[Swift4] Expanding CodableHelper with added date and JSON customisations (#3365)

* Expanding CodableHelper with a more customisable dateFormatter and JSON en-/decoder.

* Ran ./bin/swift4-petstore.sh

* Ran ./bin/swift4-petstore-all.sh again after merge from master.

* Ran ./bin/swift4-petstore-all.sh again after building.

* Ran ./bin/swift4-petstore-all.sh again after rebase latest from upstream master.

* sync master, update samples

* Built and ran ./bin/swift4-petstore-all.sh

* Re-adding code which disappeared in rebase from master.

* Fixed test

* [swift] remove old classes

modules/openapi-generator/src/main/resources/swift4/CodableHelper.mustache

@@ -11,27 +11,48 @@ import Foundation
 
 {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}open{{/nonPublicApi}} class CodableHelper {
 
-    {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} static var dateformatter: DateFormatter?
+    private static var customDateFormatter: DateFormatter?
+    private static var defaultDateFormatter: DateFormatter = {
+        let dateFormatter = DateFormatter()
+        dateFormatter.calendar = Calendar(identifier: .iso8601)
+        dateFormatter.locale = Locale(identifier: "en_US_POSIX")
+        dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
+        dateFormatter.dateFormat = Configuration.dateFormat
+        return dateFormatter
+    }()
+    private static var customJSONDecoder: JSONDecoder?
+    private static var defaultJSONDecoder: JSONDecoder = {
+        let decoder = JSONDecoder()
+        decoder.dateDecodingStrategy = .formatted(CodableHelper.dateFormatter)
+        return decoder
+    }()
+    private static var customJSONEncoder: JSONEncoder?
+    private static var defaultJSONEncoder: JSONEncoder = {
+       let encoder = JSONEncoder()
+        encoder.dateEncodingStrategy = .formatted(CodableHelper.dateFormatter)
+        encoder.outputFormatting = .prettyPrinted
+        return encoder
+    }()
+
+    {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} static var dateFormatter: DateFormatter {
+        get { return self.customDateFormatter ?? self.defaultDateFormatter }
+        set { self.customDateFormatter = newValue }
+    }
+    {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} static var jsonDecoder: JSONDecoder {
+        get { return self.customJSONDecoder ?? self.defaultJSONDecoder }
+        set { self.customJSONDecoder = newValue }
+    }
+    {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} static var jsonEncoder: JSONEncoder {
+        get { return self.customJSONEncoder ?? self.defaultJSONEncoder }
+        set { self.customJSONEncoder = newValue }
+    }
 
     {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}open{{/nonPublicApi}} class func decode<T>(_ type: T.Type, from data: Data) -> (decodableObj: T?, error: Error?) where T : Decodable {
         var returnedDecodable: T? = nil
         var returnedError: Error? = nil
 
-        let decoder = JSONDecoder()
-        if let df = self.dateformatter {
-            decoder.dateDecodingStrategy = .formatted(df)
-        } else {
-            decoder.dataDecodingStrategy = .base64
-            let formatter = DateFormatter()
-            formatter.calendar = Calendar(identifier: .iso8601)
-            formatter.locale = Locale(identifier: "en_US_POSIX")
-            formatter.timeZone = TimeZone(secondsFromGMT: 0)
-            formatter.dateFormat = Configuration.dateFormat
-            decoder.dateDecodingStrategy = .formatted(formatter)
-        }
-
         do {
-            returnedDecodable = try decoder.decode(type, from: data)
+            returnedDecodable = try self.jsonDecoder.decode(type, from: data)
         } catch {
             returnedError = error
         }
@@ -39,33 +60,16 @@ import Foundation
         return (returnedDecodable, returnedError)
     }
 
-    {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}open{{/nonPublicApi}} class func encode<T>(_ value: T, prettyPrint: Bool = false) -> EncodeResult where T : Encodable {
+    {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}open{{/nonPublicApi}} class func encode<T>(_ value: T) -> EncodeResult where T : Encodable {
         var returnedData: Data?
         var returnedError: Error? = nil
 
-        let encoder = JSONEncoder()
-        if prettyPrint {
-            encoder.outputFormatting = .prettyPrinted
-        }
-        if let df = self.dateformatter {
-            encoder.dateEncodingStrategy = .formatted(df)
-        } else {
-            encoder.dataEncodingStrategy = .base64
-            let formatter = DateFormatter()
-            formatter.calendar = Calendar(identifier: .iso8601)
-            formatter.locale = Locale(identifier: "en_US_POSIX")
-            formatter.timeZone = TimeZone(secondsFromGMT: 0)
-            formatter.dateFormat = Configuration.dateFormat
-            encoder.dateEncodingStrategy = .formatted(formatter)
-        }
-
         do {
-            returnedData = try encoder.encode(value)
+            returnedData = try self.jsonEncoder.encode(value)
         } catch {
             returnedError = error
         }
 
         return (returnedData, returnedError)
     }
-
 }

modules/openapi-generator/src/main/resources/swift4/Extensions.mustache

@@ -69,22 +69,9 @@ extension Data: JSONEncodable {
     }
 }
 
-private let dateFormatter: DateFormatter = {
-    if let formatter = CodableHelper.dateformatter {
-        return formatter
-    } else {
-        let formatter = DateFormatter()
-        formatter.calendar = Calendar(identifier: .iso8601)
-        formatter.locale = Locale(identifier: "en_US_POSIX")
-        formatter.timeZone = TimeZone(secondsFromGMT: 0)
-        formatter.dateFormat = Configuration.dateFormat
-        return formatter
-    }
-}()
-
 extension Date: JSONEncodable {
     func encodeToJSON() -> Any {
-        return dateFormatter.string(from: self) as Any
+        return CodableHelper.dateFormatter.string(from: self) as Any
     }
 }
 

modules/openapi-generator/src/main/resources/swift4/JSONEncodingHelper.mustache

@@ -15,7 +15,7 @@ import Alamofire
 
         // Encode the Encodable object
         if let encodableObj = encodableObj {
-            let encodeResult = CodableHelper.encode(encodableObj, prettyPrint: true)
+            let encodeResult = CodableHelper.encode(encodableObj)
             if encodeResult.error == nil {
                 params = JSONDataEncoding.encodingParameters(jsonData: encodeResult.data)
             }

modules/openapi-generator/src/main/resources/swift4/model.mustache

@@ -8,7 +8,6 @@
 import Foundation
 
 {{#description}}
-
 /** {{description}} */{{/description}}
 {{#isArrayModel}}
 {{> modelArray}}

modules/openapi-generator/src/main/resources/swift4/modelObject.mustache

@@ -1,4 +1,3 @@
-
 {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} struct {{classname}}: Codable {
 
 {{#allVars}}
@@ -78,5 +77,4 @@
         case {{name}}{{#vendorExtensions.x-codegen-escaped-property-name}} = "{{{baseName}}}"{{/vendorExtensions.x-codegen-escaped-property-name}}{{/allVars}}
     }
 {{/vendorExtensions.x-codegen-has-escaped-property-names}}{{/additionalPropertiesType}}
-
 }

samples/client/petstore/scala-akka/.openapi-generator/VERSION

@@ -1 +1 @@
-4.1.3-SNAPSHOT
+4.2.0-SNAPSHOT

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/ApiInvoker.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/api/PetApi.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -25,12 +25,13 @@ import com.sun.jersey.multipart.file.FileDataBodyPart
 import com.wordnik.swagger.client._
 import com.wordnik.swagger.client.ClientResponseReaders.Json4sFormatsReader._
 import com.wordnik.swagger.client.RequestWriters.Json4sFormatsWriter._
+import javax.ws.rs.core.Response.Status.Family
 
 import java.net.URI
 import java.io.File
 import java.util.Date
 import java.util.TimeZone
-import javax.ws.rs.core.MediaType
+import javax.ws.rs.core.{MediaType, Response}
 
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent._
@@ -309,7 +310,11 @@ class PetApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("POST", path, queryParams.toMap, headerParams.toMap, writer.write(body))
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -331,7 +336,11 @@ class PetApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("DELETE", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -348,7 +357,11 @@ class PetApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("GET", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -365,7 +378,11 @@ class PetApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("GET", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -381,7 +398,11 @@ class PetApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("GET", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -397,7 +418,11 @@ class PetApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("PUT", path, queryParams.toMap, headerParams.toMap, writer.write(body))
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -416,7 +441,11 @@ class PetApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("POST", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -435,7 +464,11 @@ class PetApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("POST", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/api/StoreApi.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -23,12 +23,13 @@ import com.sun.jersey.multipart.file.FileDataBodyPart
 import com.wordnik.swagger.client._
 import com.wordnik.swagger.client.ClientResponseReaders.Json4sFormatsReader._
 import com.wordnik.swagger.client.RequestWriters.Json4sFormatsWriter._
+import javax.ws.rs.core.Response.Status.Family
 
 import java.net.URI
 import java.io.File
 import java.util.Date
 import java.util.TimeZone
-import javax.ws.rs.core.MediaType
+import javax.ws.rs.core.{MediaType, Response}
 
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent._
@@ -193,7 +194,11 @@ class StoreApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extend
 
     val resFuture = client.submit("DELETE", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -208,7 +213,11 @@ class StoreApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extend
 
     val resFuture = client.submit("GET", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -224,7 +233,11 @@ class StoreApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extend
 
     val resFuture = client.submit("GET", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -240,7 +253,11 @@ class StoreApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extend
 
     val resFuture = client.submit("POST", path, queryParams.toMap, headerParams.toMap, writer.write(body))
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/api/UserApi.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -23,12 +23,13 @@ import com.sun.jersey.multipart.file.FileDataBodyPart
 import com.wordnik.swagger.client._
 import com.wordnik.swagger.client.ClientResponseReaders.Json4sFormatsReader._
 import com.wordnik.swagger.client.RequestWriters.Json4sFormatsWriter._
+import javax.ws.rs.core.Response.Status.Family
 
 import java.net.URI
 import java.io.File
 import java.util.Date
 import java.util.TimeZone
-import javax.ws.rs.core.MediaType
+import javax.ws.rs.core.{MediaType, Response}
 
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent._
@@ -299,7 +300,11 @@ class UserApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("POST", path, queryParams.toMap, headerParams.toMap, writer.write(body))
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -315,7 +320,11 @@ class UserApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("POST", path, queryParams.toMap, headerParams.toMap, writer.write(body))
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -331,7 +340,11 @@ class UserApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("POST", path, queryParams.toMap, headerParams.toMap, writer.write(body))
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -349,7 +362,11 @@ class UserApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("DELETE", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -367,7 +384,11 @@ class UserApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("GET", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -389,7 +410,11 @@ class UserApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("GET", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -404,7 +429,11 @@ class UserApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("GET", path, queryParams.toMap, headerParams.toMap, "")
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 
@@ -424,7 +453,11 @@ class UserApiAsyncHelper(client: TransportClient, config: SwaggerConfig) extends
 
     val resFuture = client.submit("PUT", path, queryParams.toMap, headerParams.toMap, writer.write(body))
     resFuture flatMap { resp =>
-      process(reader.read(resp))
+      val status = Response.Status.fromStatusCode(resp.statusCode)
+      status.getFamily match {
+        case Family.SUCCESSFUL | Family.REDIRECTION | Family.INFORMATIONAL => process(reader.read(resp))
+        case _ => throw new ApiException(resp.statusCode, resp.statusText)
+      }
     }
   }
 

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/model/ApiResponse.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/model/Category.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/model/Order.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/model/Pet.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/model/Tag.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).

samples/client/petstore/scala-httpclient/bin/org/openapitools/client/model/User.scala

@@ -2,7 +2,7 @@
  * OpenAPI Petstore
  * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
  *
- * OpenAPI spec version: 1.0.0
+ * The version of the OpenAPI document: 1.0.0
  * 
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).

samples/client/petstore/swift3/default/PetstoreClient/Classes/OpenAPIs/Models/AnimalFarm.swift

@@ -7,5 +7,4 @@
 
 import Foundation
 
-
 public typealias AnimalFarm = [Animal]

samples/client/petstore/swift3/objcCompatible/PetstoreClient/Classes/OpenAPIs/Models/AnimalFarm.swift

@@ -7,5 +7,4 @@
 
 import Foundation
 
-
 public typealias AnimalFarm = [Animal]

samples/client/petstore/swift3/rxswift/SwaggerClientTests/Pods/RxSwift/RxSwift/Disposables/Disposables.swift

@@ -10,4 +10,3 @@
 public struct Disposables {
     private init() {}
 }
-

samples/client/petstore/swift3/rxswift/SwaggerClientTests/Pods/RxSwift/RxSwift/Disposables/NopDisposable.swift

@@ -9,7 +9,7 @@
 /// Represents a disposable that does nothing on disposal.
 ///
 /// Nop = No Operation
-fileprivate struct NopDisposable : Disposable {
+private struct NopDisposable: Disposable {
 
     fileprivate static let noOp: Disposable = NopDisposable()
 

samples/client/petstore/swift3/rxswift/SwaggerClientTests/Pods/RxSwift/RxSwift/Errors.swift

@@ -10,9 +10,7 @@ let RxErrorDomain       = "RxErrorDomain"
 let RxCompositeFailures = "RxCompositeFailures"
 
 /// Generic Rx error codes.
-public enum RxError
-    : Swift.Error
-    , CustomDebugStringConvertible {
+public enum RxError: Swift.Error, CustomDebugStringConvertible {
     /// Unknown error occurred.
     case unknown
     /// Performing an action on disposed object.

samples/client/petstore/swift3/rxswift/SwaggerClientTests/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItemType.swift

@@ -6,8 +6,6 @@
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
 //
 
-protocol ScheduledItemType
-    : Cancelable
-    , InvocableType {
+protocol ScheduledItemType: Cancelable, InvocableType {
     func invoke()
 }

samples/client/petstore/swift4/default/.openapi-generator/VERSION

@@ -1 +1 @@
-4.2.2-SNAPSHOT
+4.2.3-SNAPSHOT

samples/client/petstore/swift4/default/Package.swift

@@ -9,11 +9,11 @@ let package = Package(
         // Products define the executables and libraries produced by a package, and make them visible to other packages.
         .library(
             name: "PetstoreClient",
-            targets: ["PetstoreClient"])
+            targets: ["PetstoreClient"]),
     ],
     dependencies: [
         // Dependencies declare other packages that this package depends on.
-        .package(url: "https://github.com/Alamofire/Alamofire.git", from: "4.9.0")
+        .package(url: "https://github.com/Alamofire/Alamofire.git", from: "4.9.0"),
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
@@ -22,6 +22,6 @@ let package = Package(
             name: "PetstoreClient",
             dependencies: ["Alamofire"],
             path: "PetstoreClient/Classes"
-        )
+        ),
     ]
 )

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/APIHelper.swift

@@ -22,7 +22,7 @@ public struct APIHelper {
 
     public static func rejectNilHeaders(_ source: [String:Any?]) -> [String:String] {
         return source.reduce(into: [String: String]()) { (result, item) in
-            if let collection = item.value as? [Any?] {
+            if let collection = item.value as? Array<Any?> {
                 result[item.key] = collection.filter({ $0 != nil }).map{ "\($0!)" }.joined(separator: ",")
             } else if let value: Any = item.value {
                 result[item.key] = "\(value)"
@@ -46,7 +46,7 @@ public struct APIHelper {
     }
 
     public static func mapValueToPathItem(_ source: Any) -> Any {
-        if let collection = source as? [Any?] {
+        if let collection = source as? Array<Any?> {
             return collection.filter({ $0 != nil }).map({"\($0!)"}).joined(separator: ",")
         }
         return source
@@ -54,7 +54,7 @@ public struct APIHelper {
 
     public static func mapValuesToQueryItems(_ source: [String:Any?]) -> [URLQueryItem]? {
         let destination = source.filter({ $0.value != nil}).reduce(into: [URLQueryItem]()) { (result, item) in
-            if let collection = item.value as? [Any?] {
+            if let collection = item.value as? Array<Any?> {
                 let value = collection.filter({ $0 != nil }).map({"\($0!)"}).joined(separator: ",")
                 result.append(URLQueryItem(name: item.key, value: value))
             } else if let value = item.value {
@@ -68,3 +68,4 @@ public struct APIHelper {
         return destination
     }
 }
+

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/APIs.swift

@@ -23,7 +23,7 @@ open class RequestBuilder<T> {
     public let URLString: String
 
     /// Optional block to obtain a reference to the request's progress instance when available.
-    public var onProgressReady: ((Progress) -> Void)?
+    public var onProgressReady: ((Progress) -> ())?
 
     required public init(method: String, URLString: String, parameters: [String:Any]?, isBody: Bool, headers: [String:String] = [:]) {
         self.method = method

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/APIs/AnotherFakeAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 open class AnotherFakeAPI {
     /**
      To test special tags

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/APIs/FakeAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 open class FakeAPI {
     /**
 
@@ -130,7 +132,7 @@ open class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func testBodyWithFileSchema(body: FileSchemaTestClass, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testBodyWithFileSchemaWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        testBodyWithFileSchemaWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -164,7 +166,7 @@ open class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func testBodyWithQueryParams(query: String, body: User, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testBodyWithQueryParamsWithRequestBuilder(query: query, body: body).execute { (_, error) -> Void in
+        testBodyWithQueryParamsWithRequestBuilder(query: query, body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -245,7 +247,7 @@ open class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func testEndpointParameters(number: Double, double: Double, patternWithoutDelimiter: String, byte: Data, integer: Int? = nil, int32: Int? = nil, int64: Int64? = nil, float: Float? = nil, string: String? = nil, binary: URL? = nil, date: Date? = nil, dateTime: Date? = nil, password: String? = nil, callback: String? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testEndpointParametersWithRequestBuilder(number: number, double: double, patternWithoutDelimiter: patternWithoutDelimiter, byte: byte, integer: integer, int32: int32, int64: int64, float: float, string: string, binary: binary, date: date, dateTime: dateTime, password: password, callback: callback).execute { (_, error) -> Void in
+        testEndpointParametersWithRequestBuilder(number: number, double: double, patternWithoutDelimiter: patternWithoutDelimiter, byte: byte, integer: integer, int32: int32, int64: int64, float: float, string: string, binary: binary, date: date, dateTime: dateTime, password: password, callback: callback).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -388,7 +390,7 @@ open class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func testEnumParameters(enumHeaderStringArray: [String]? = nil, enumHeaderString: EnumHeaderString_testEnumParameters? = nil, enumQueryStringArray: [String]? = nil, enumQueryString: EnumQueryString_testEnumParameters? = nil, enumQueryInteger: EnumQueryInteger_testEnumParameters? = nil, enumQueryDouble: EnumQueryDouble_testEnumParameters? = nil, enumFormStringArray: [String]? = nil, enumFormString: EnumFormString_testEnumParameters? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testEnumParametersWithRequestBuilder(enumHeaderStringArray: enumHeaderStringArray, enumHeaderString: enumHeaderString, enumQueryStringArray: enumQueryStringArray, enumQueryString: enumQueryString, enumQueryInteger: enumQueryInteger, enumQueryDouble: enumQueryDouble, enumFormStringArray: enumFormStringArray, enumFormString: enumFormString).execute { (_, error) -> Void in
+        testEnumParametersWithRequestBuilder(enumHeaderStringArray: enumHeaderStringArray, enumHeaderString: enumHeaderString, enumQueryStringArray: enumQueryStringArray, enumQueryString: enumQueryString, enumQueryInteger: enumQueryInteger, enumQueryDouble: enumQueryDouble, enumFormStringArray: enumFormStringArray, enumFormString: enumFormString).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -452,7 +454,7 @@ open class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func testGroupParameters(requiredStringGroup: Int, requiredBooleanGroup: Bool, requiredInt64Group: Int64, stringGroup: Int? = nil, booleanGroup: Bool? = nil, int64Group: Int64? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testGroupParametersWithRequestBuilder(requiredStringGroup: requiredStringGroup, requiredBooleanGroup: requiredBooleanGroup, requiredInt64Group: requiredInt64Group, stringGroup: stringGroup, booleanGroup: booleanGroup, int64Group: int64Group).execute { (_, error) -> Void in
+        testGroupParametersWithRequestBuilder(requiredStringGroup: requiredStringGroup, requiredBooleanGroup: requiredBooleanGroup, requiredInt64Group: requiredInt64Group, stringGroup: stringGroup, booleanGroup: booleanGroup, int64Group: int64Group).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -503,7 +505,7 @@ open class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func testInlineAdditionalProperties(param: [String:String], completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testInlineAdditionalPropertiesWithRequestBuilder(param: param).execute { (_, error) -> Void in
+        testInlineAdditionalPropertiesWithRequestBuilder(param: param).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -538,7 +540,7 @@ open class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func testJsonFormData(param: String, param2: String, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testJsonFormDataWithRequestBuilder(param: param, param2: param2).execute { (_, error) -> Void in
+        testJsonFormDataWithRequestBuilder(param: param, param2: param2).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/APIs/FakeClassnameTags123API.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 open class FakeClassnameTags123API {
     /**
      To test class name in snake case

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/APIs/PetAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 open class PetAPI {
     /**
      Add a new pet to the store
@@ -15,7 +17,7 @@ open class PetAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func addPet(body: Pet, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        addPetWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        addPetWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -53,7 +55,7 @@ open class PetAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func deletePet(petId: Int64, apiKey: String? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        deletePetWithRequestBuilder(petId: petId, apiKey: apiKey).execute { (_, error) -> Void in
+        deletePetWithRequestBuilder(petId: petId, apiKey: apiKey).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -218,7 +220,7 @@ open class PetAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func updatePet(body: Pet, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        updatePetWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        updatePetWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -257,7 +259,7 @@ open class PetAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func updatePetWithForm(petId: Int64, name: String? = nil, status: String? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        updatePetWithFormWithRequestBuilder(petId: petId, name: name, status: status).execute { (_, error) -> Void in
+        updatePetWithFormWithRequestBuilder(petId: petId, name: name, status: status).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/APIs/StoreAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 open class StoreAPI {
     /**
      Delete purchase order by ID
@@ -15,7 +17,7 @@ open class StoreAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func deleteOrder(orderId: String, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        deleteOrderWithRequestBuilder(orderId: orderId).execute { (_, error) -> Void in
+        deleteOrderWithRequestBuilder(orderId: orderId).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/APIs/UserAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 open class UserAPI {
     /**
      Create user
@@ -15,7 +17,7 @@ open class UserAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func createUser(body: User, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        createUserWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        createUserWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -50,7 +52,7 @@ open class UserAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func createUsersWithArrayInput(body: [User], completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        createUsersWithArrayInputWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        createUsersWithArrayInputWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -84,7 +86,7 @@ open class UserAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func createUsersWithListInput(body: [User], completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        createUsersWithListInputWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        createUsersWithListInputWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -118,7 +120,7 @@ open class UserAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func deleteUser(username: String, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        deleteUserWithRequestBuilder(username: username).execute { (_, error) -> Void in
+        deleteUserWithRequestBuilder(username: username).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -225,7 +227,7 @@ open class UserAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func logoutUser(completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        logoutUserWithRequestBuilder().execute { (_, error) -> Void in
+        logoutUserWithRequestBuilder().execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -259,7 +261,7 @@ open class UserAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     open class func updateUser(username: String, body: User, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        updateUserWithRequestBuilder(username: username, body: body).execute { (_, error) -> Void in
+        updateUserWithRequestBuilder(username: username, body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/AlamofireImplementations.swift

@@ -111,7 +111,8 @@ open class AlamofireRequestBuilder<T>: RequestBuilder<T> {
                     case let fileURL as URL:
                         if let mimeType = self.contentTypeForFormPart(fileURL: fileURL) {
                             mpForm.append(fileURL, withName: k, fileName: fileURL.lastPathComponent, mimeType: mimeType)
-                        } else {
+                        }
+                        else {
                             mpForm.append(fileURL, withName: k)
                         }
                     case let string as String:
@@ -283,7 +284,7 @@ open class AlamofireRequestBuilder<T>: RequestBuilder<T> {
 
         let items = contentDisposition.components(separatedBy: ";")
 
-        var filename: String?
+        var filename : String? = nil
 
         for contentItem in items {
 
@@ -328,7 +329,7 @@ open class AlamofireRequestBuilder<T>: RequestBuilder<T> {
 
 }
 
-private enum DownloadException: Error {
+fileprivate enum DownloadException : Error {
     case responseDataMissing
     case responseFailed
     case requestMissing
@@ -435,7 +436,7 @@ open class AlamofireDecodableRequestBuilder<T: Decodable>: AlamofireRequestBuild
                     return
                 }
 
-                var responseObj: Response<T>?
+                var responseObj: Response<T>? = nil
 
                 let decodeResult: (decodableObj: T?, error: Error?) = CodableHelper.decode(T.self, from: data)
                 if decodeResult.error == nil {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/CodableHelper.swift

@@ -11,27 +11,48 @@ public typealias EncodeResult = (data: Data?, error: Error?)
 
 open class CodableHelper {
 
-    public static var dateformatter: DateFormatter?
-
-    open class func decode<T>(_ type: T.Type, from data: Data) -> (decodableObj: T?, error: Error?) where T: Decodable {
-        var returnedDecodable: T?
-        var returnedError: Error?
-
+    private static var customDateFormatter: DateFormatter?
+    private static var defaultDateFormatter: DateFormatter = {
+        let dateFormatter = DateFormatter()
+        dateFormatter.calendar = Calendar(identifier: .iso8601)
+        dateFormatter.locale = Locale(identifier: "en_US_POSIX")
+        dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
+        dateFormatter.dateFormat = Configuration.dateFormat
+        return dateFormatter
+    }()
+    private static var customJSONDecoder: JSONDecoder?
+    private static var defaultJSONDecoder: JSONDecoder = {
         let decoder = JSONDecoder()
-        if let df = self.dateformatter {
-            decoder.dateDecodingStrategy = .formatted(df)
-        } else {
-            decoder.dataDecodingStrategy = .base64
-            let formatter = DateFormatter()
-            formatter.calendar = Calendar(identifier: .iso8601)
-            formatter.locale = Locale(identifier: "en_US_POSIX")
-            formatter.timeZone = TimeZone(secondsFromGMT: 0)
-            formatter.dateFormat = Configuration.dateFormat
-            decoder.dateDecodingStrategy = .formatted(formatter)
+        decoder.dateDecodingStrategy = .formatted(CodableHelper.dateFormatter)
+        return decoder
+    }()
+    private static var customJSONEncoder: JSONEncoder?
+    private static var defaultJSONEncoder: JSONEncoder = {
+       let encoder = JSONEncoder()
+        encoder.dateEncodingStrategy = .formatted(CodableHelper.dateFormatter)
+        encoder.outputFormatting = .prettyPrinted
+        return encoder
+    }()
+
+    public static var dateFormatter: DateFormatter {
+        get { return self.customDateFormatter ?? self.defaultDateFormatter }
+        set { self.customDateFormatter = newValue }
+    }
+    public static var jsonDecoder: JSONDecoder {
+        get { return self.customJSONDecoder ?? self.defaultJSONDecoder }
+        set { self.customJSONDecoder = newValue }
+    }
+    public static var jsonEncoder: JSONEncoder {
+        get { return self.customJSONEncoder ?? self.defaultJSONEncoder }
+        set { self.customJSONEncoder = newValue }
     }
 
+    open class func decode<T>(_ type: T.Type, from data: Data) -> (decodableObj: T?, error: Error?) where T : Decodable {
+        var returnedDecodable: T? = nil
+        var returnedError: Error? = nil
+
         do {
-            returnedDecodable = try decoder.decode(type, from: data)
+            returnedDecodable = try self.jsonDecoder.decode(type, from: data)
         } catch {
             returnedError = error
         }
@@ -39,33 +60,16 @@ open class CodableHelper {
         return (returnedDecodable, returnedError)
     }
 
-    open class func encode<T>(_ value: T, prettyPrint: Bool = false) -> EncodeResult where T: Encodable {
+    open class func encode<T>(_ value: T) -> EncodeResult where T : Encodable {
         var returnedData: Data?
-        var returnedError: Error?
-
-        let encoder = JSONEncoder()
-        if prettyPrint {
-            encoder.outputFormatting = .prettyPrinted
-        }
-        if let df = self.dateformatter {
-            encoder.dateEncodingStrategy = .formatted(df)
-        } else {
-            encoder.dataEncodingStrategy = .base64
-            let formatter = DateFormatter()
-            formatter.calendar = Calendar(identifier: .iso8601)
-            formatter.locale = Locale(identifier: "en_US_POSIX")
-            formatter.timeZone = TimeZone(secondsFromGMT: 0)
-            formatter.dateFormat = Configuration.dateFormat
-            encoder.dateEncodingStrategy = .formatted(formatter)
-        }
+        var returnedError: Error? = nil
 
         do {
-            returnedData = try encoder.encode(value)
+            returnedData = try self.jsonEncoder.encode(value)
         } catch {
             returnedError = error
         }
 
         return (returnedData, returnedError)
     }
-
 }

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Extensions.swift

@@ -68,22 +68,9 @@ extension Data: JSONEncodable {
     }
 }
 
-private let dateFormatter: DateFormatter = {
-    if let formatter = CodableHelper.dateformatter {
-        return formatter
-    } else {
-        let formatter = DateFormatter()
-        formatter.calendar = Calendar(identifier: .iso8601)
-        formatter.locale = Locale(identifier: "en_US_POSIX")
-        formatter.timeZone = TimeZone(secondsFromGMT: 0)
-        formatter.dateFormat = Configuration.dateFormat
-        return formatter
-    }
-}()
-
 extension Date: JSONEncodable {
     func encodeToJSON() -> Any {
-        return dateFormatter.string(from: self) as Any
+        return CodableHelper.dateFormatter.string(from: self) as Any
     }
 }
 
@@ -161,7 +148,7 @@ extension KeyedDecodingContainerProtocol {
     }
 
     public func decodeArrayIfPresent<T>(_ type: T.Type, forKey key: Self.Key) throws -> [T]? where T : Decodable {
-        var tmpArray: [T]?
+        var tmpArray: [T]? = nil
 
         if contains(key) {
             tmpArray = try decodeArray(T.self, forKey: key)
@@ -184,3 +171,5 @@ extension KeyedDecodingContainerProtocol {
     }
 
 }
+
+

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/JSONEncodableEncoding.swift

@@ -42,7 +42,7 @@ public struct JSONDataEncoding: ParameterEncoding {
     }
 
     public static func encodingParameters(jsonData: Data?) -> Parameters? {
-        var returnedParams: Parameters?
+        var returnedParams: Parameters? = nil
         if let jsonData = jsonData, !jsonData.isEmpty {
             var params = Parameters()
             params[jsonDataKey] = jsonData

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/JSONEncodingHelper.swift

@@ -11,11 +11,11 @@ import Alamofire
 open class JSONEncodingHelper {
 
     open class func encodingParameters<T:Encodable>(forEncodableObject encodableObj: T?) -> Parameters? {
-        var params: Parameters?
+        var params: Parameters? = nil
 
         // Encode the Encodable object
         if let encodableObj = encodableObj {
-            let encodeResult = CodableHelper.encode(encodableObj, prettyPrint: true)
+            let encodeResult = CodableHelper.encode(encodableObj)
             if encodeResult.error == nil {
                 params = JSONDataEncoding.encodingParameters(jsonData: encodeResult.data)
             }
@@ -25,7 +25,7 @@ open class JSONEncodingHelper {
     }
 
     open class func encodingParameters(forEncodableObject encodableObj: Any?) -> Parameters? {
-        var params: Parameters?
+        var params: Parameters? = nil
 
         if let encodableObj = encodableObj {
             do {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/AdditionalPropertiesClass.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct AdditionalPropertiesClass: Codable {
 
     public var mapString: [String:String]?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Animal.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Animal: Codable {
 
     public var className: String

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/AnimalFarm.swift

@@ -7,4 +7,5 @@
 
 import Foundation
 
+
 public typealias AnimalFarm = [Animal]

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/ApiResponse.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct ApiResponse: Codable {
 
     public var code: Int?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/ArrayOfArrayOfNumberOnly.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct ArrayOfArrayOfNumberOnly: Codable {
 
     public var arrayArrayNumber: [[Double]]?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/ArrayOfNumberOnly.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct ArrayOfNumberOnly: Codable {
 
     public var arrayNumber: [Double]?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/ArrayTest.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct ArrayTest: Codable {
 
     public var arrayOfString: [String]?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Capitalization.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Capitalization: Codable {
 
     public var smallCamel: String?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Cat.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Cat: Codable {
 
     public var className: String

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/CatAllOf.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct CatAllOf: Codable {
 
     public var declawed: Bool?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Category.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Category: Codable {
 
     public var id: Int64?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/ClassModel.swift

@@ -8,7 +8,6 @@
 import Foundation
 
 /** Model for testing model with \"_class\" property */
-
 public struct ClassModel: Codable {
 
     public var _class: String?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Client.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Client: Codable {
 
     public var client: String?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Dog.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Dog: Codable {
 
     public var className: String

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/DogAllOf.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct DogAllOf: Codable {
 
     public var breed: String?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/EnumArrays.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct EnumArrays: Codable {
 
     public enum JustSymbol: String, Codable {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/EnumClass.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public enum EnumClass: String, Codable {
     case abc = "_abc"
     case efg = "-efg"

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/EnumTest.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct EnumTest: Codable {
 
     public enum EnumString: String, Codable {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/File.swift

@@ -8,7 +8,6 @@
 import Foundation
 
 /** Must be named `File` for test. */
-
 public struct File: Codable {
 
     /** Test capitalization */

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/FileSchemaTestClass.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct FileSchemaTestClass: Codable {
 
     public var file: File?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/FormatTest.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct FormatTest: Codable {
 
     public var integer: Int?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/HasOnlyReadOnly.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct HasOnlyReadOnly: Codable {
 
     public var bar: String?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/List.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct List: Codable {
 
     public var _123list: String?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/MapTest.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct MapTest: Codable {
 
     public enum MapOfEnumString: String, Codable {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/MixedPropertiesAndAdditionalPropertiesClass.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct MixedPropertiesAndAdditionalPropertiesClass: Codable {
 
     public var uuid: UUID?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Model200Response.swift

@@ -8,7 +8,6 @@
 import Foundation
 
 /** Model for testing model name starting with number */
-
 public struct Model200Response: Codable {
 
     public var name: Int?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Name.swift

@@ -8,7 +8,6 @@
 import Foundation
 
 /** Model for testing model name same as property name */
-
 public struct Name: Codable {
 
     public var name: Int

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/NumberOnly.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct NumberOnly: Codable {
 
     public var justNumber: Double?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Order.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Order: Codable {
 
     public enum Status: String, Codable {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/OuterComposite.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct OuterComposite: Codable {
 
     public var myNumber: Double?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/OuterEnum.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public enum OuterEnum: String, Codable {
     case placed = "placed"
     case approved = "approved"

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Pet.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Pet: Codable {
 
     public enum Status: String, Codable {

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/ReadOnlyFirst.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct ReadOnlyFirst: Codable {
 
     public var bar: String?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Return.swift

@@ -8,7 +8,6 @@
 import Foundation
 
 /** Model for testing reserved words */
-
 public struct Return: Codable {
 
     public var _return: Int?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/SpecialModelName.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct SpecialModelName: Codable {
 
     public var specialPropertyName: Int64?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/StringBooleanMap.swift

@@ -7,8 +7,10 @@
 
 import Foundation
 
+
 public struct StringBooleanMap: Codable {
 
+
     public var additionalProperties: [String:Bool] = [:]
 
     public subscript(key: String) -> Bool? {
@@ -42,4 +44,5 @@ public struct StringBooleanMap: Codable {
         additionalProperties = try container.decodeMap(Bool.self, excludedKeys: nonAdditionalPropertyKeys)
     }
 
+
 }

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/Tag.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct Tag: Codable {
 
     public var id: Int64?

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/TypeHolderDefault.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct TypeHolderDefault: Codable {
 
     public var stringItem: String = "what"

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/TypeHolderExample.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct TypeHolderExample: Codable {
 
     public var stringItem: String

samples/client/petstore/swift4/default/PetstoreClient/Classes/OpenAPIs/Models/User.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+
 public struct User: Codable {
 
     public var id: Int64?

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/Alamofire.swift

@@ -0,0 +1,456 @@
+//
+//  Alamofire.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Types adopting the `URLConvertible` protocol can be used to construct URLs, which are then used to construct
+/// URL requests.
+public protocol URLConvertible {
+    /// Returns a URL that conforms to RFC 2396 or throws an `Error`.
+    ///
+    /// - throws: An `Error` if the type cannot be converted to a `URL`.
+    ///
+    /// - returns: A URL or throws an `Error`.
+    func asURL() throws -> URL
+}
+
+extension String: URLConvertible {
+    /// Returns a URL if `self` represents a valid URL string that conforms to RFC 2396 or throws an `AFError`.
+    ///
+    /// - throws: An `AFError.invalidURL` if `self` is not a valid URL string.
+    ///
+    /// - returns: A URL or throws an `AFError`.
+    public func asURL() throws -> URL {
+        guard let url = URL(string: self) else { throw AFError.invalidURL(url: self) }
+        return url
+    }
+}
+
+extension URL: URLConvertible {
+    /// Returns self.
+    public func asURL() throws -> URL { return self }
+}
+
+extension URLComponents: URLConvertible {
+    /// Returns a URL if `url` is not nil, otherwise throws an `Error`.
+    ///
+    /// - throws: An `AFError.invalidURL` if `url` is `nil`.
+    ///
+    /// - returns: A URL or throws an `AFError`.
+    public func asURL() throws -> URL {
+        guard let url = url else { throw AFError.invalidURL(url: self) }
+        return url
+    }
+}
+
+// MARK: -
+
+/// Types adopting the `URLRequestConvertible` protocol can be used to construct URL requests.
+public protocol URLRequestConvertible {
+    /// Returns a URL request or throws if an `Error` was encountered.
+    ///
+    /// - throws: An `Error` if the underlying `URLRequest` is `nil`.
+    ///
+    /// - returns: A URL request.
+    func asURLRequest() throws -> URLRequest
+}
+
+extension URLRequestConvertible {
+    /// The URL request.
+    public var urlRequest: URLRequest? { return try? asURLRequest() }
+}
+
+extension URLRequest: URLRequestConvertible {
+    /// Returns a URL request or throws if an `Error` was encountered.
+    public func asURLRequest() throws -> URLRequest { return self }
+}
+
+// MARK: -
+
+extension URLRequest {
+    /// Creates an instance with the specified `method`, `urlString` and `headers`.
+    ///
+    /// - parameter url:     The URL.
+    /// - parameter method:  The HTTP method.
+    /// - parameter headers: The HTTP headers. `nil` by default.
+    ///
+    /// - returns: The new `URLRequest` instance.
+    public init(url: URLConvertible, method: HTTPMethod, headers: HTTPHeaders? = nil) throws {
+        let url = try url.asURL()
+
+        self.init(url: url)
+
+        httpMethod = method.rawValue
+
+        if let headers = headers {
+            for (headerField, headerValue) in headers {
+                setValue(headerValue, forHTTPHeaderField: headerField)
+            }
+        }
+    }
+
+    func adapt(using adapter: RequestAdapter?) throws -> URLRequest {
+        guard let adapter = adapter else { return self }
+        return try adapter.adapt(self)
+    }
+}
+
+// MARK: - Data Request
+
+/// Creates a `DataRequest` using the default `SessionManager` to retrieve the contents of the specified `url`,
+/// `method`, `parameters`, `encoding` and `headers`.
+///
+/// - parameter url:        The URL.
+/// - parameter method:     The HTTP method. `.get` by default.
+/// - parameter parameters: The parameters. `nil` by default.
+/// - parameter encoding:   The parameter encoding. `URLEncoding.default` by default.
+/// - parameter headers:    The HTTP headers. `nil` by default.
+///
+/// - returns: The created `DataRequest`.
+@discardableResult
+public func request(
+    _ url: URLConvertible,
+    method: HTTPMethod = .get,
+    parameters: Parameters? = nil,
+    encoding: ParameterEncoding = URLEncoding.default,
+    headers: HTTPHeaders? = nil)
+    -> DataRequest {
+    return SessionManager.default.request(
+        url,
+        method: method,
+        parameters: parameters,
+        encoding: encoding,
+        headers: headers
+    )
+}
+
+/// Creates a `DataRequest` using the default `SessionManager` to retrieve the contents of a URL based on the
+/// specified `urlRequest`.
+///
+/// - parameter urlRequest: The URL request
+///
+/// - returns: The created `DataRequest`.
+@discardableResult
+public func request(_ urlRequest: URLRequestConvertible) -> DataRequest {
+    return SessionManager.default.request(urlRequest)
+}
+
+// MARK: - Download Request
+
+// MARK: URL Request
+
+/// Creates a `DownloadRequest` using the default `SessionManager` to retrieve the contents of the specified `url`,
+/// `method`, `parameters`, `encoding`, `headers` and save them to the `destination`.
+///
+/// If `destination` is not specified, the contents will remain in the temporary location determined by the
+/// underlying URL session.
+///
+/// - parameter url:         The URL.
+/// - parameter method:      The HTTP method. `.get` by default.
+/// - parameter parameters:  The parameters. `nil` by default.
+/// - parameter encoding:    The parameter encoding. `URLEncoding.default` by default.
+/// - parameter headers:     The HTTP headers. `nil` by default.
+/// - parameter destination: The closure used to determine the destination of the downloaded file. `nil` by default.
+///
+/// - returns: The created `DownloadRequest`.
+@discardableResult
+public func download(
+    _ url: URLConvertible,
+    method: HTTPMethod = .get,
+    parameters: Parameters? = nil,
+    encoding: ParameterEncoding = URLEncoding.default,
+    headers: HTTPHeaders? = nil,
+    to destination: DownloadRequest.DownloadFileDestination? = nil)
+    -> DownloadRequest {
+    return SessionManager.default.download(
+        url,
+        method: method,
+        parameters: parameters,
+        encoding: encoding,
+        headers: headers,
+        to: destination
+    )
+}
+
+/// Creates a `DownloadRequest` using the default `SessionManager` to retrieve the contents of a URL based on the
+/// specified `urlRequest` and save them to the `destination`.
+///
+/// If `destination` is not specified, the contents will remain in the temporary location determined by the
+/// underlying URL session.
+///
+/// - parameter urlRequest:  The URL request.
+/// - parameter destination: The closure used to determine the destination of the downloaded file. `nil` by default.
+///
+/// - returns: The created `DownloadRequest`.
+@discardableResult
+public func download(
+    _ urlRequest: URLRequestConvertible,
+    to destination: DownloadRequest.DownloadFileDestination? = nil)
+    -> DownloadRequest {
+    return SessionManager.default.download(urlRequest, to: destination)
+}
+
+// MARK: Resume Data
+
+/// Creates a `DownloadRequest` using the default `SessionManager` from the `resumeData` produced from a
+/// previous request cancellation to retrieve the contents of the original request and save them to the `destination`.
+///
+/// If `destination` is not specified, the contents will remain in the temporary location determined by the
+/// underlying URL session.
+///
+/// On the latest release of all the Apple platforms (iOS 10, macOS 10.12, tvOS 10, watchOS 3), `resumeData` is broken
+/// on background URL session configurations. There's an underlying bug in the `resumeData` generation logic where the
+/// data is written incorrectly and will always fail to resume the download. For more information about the bug and
+/// possible workarounds, please refer to the following Stack Overflow post:
+///
+///    - http://stackoverflow.com/a/39347461/1342462
+///
+/// - parameter resumeData:  The resume data. This is an opaque data blob produced by `URLSessionDownloadTask`
+///                          when a task is cancelled. See `URLSession -downloadTask(withResumeData:)` for additional
+///                          information.
+/// - parameter destination: The closure used to determine the destination of the downloaded file. `nil` by default.
+///
+/// - returns: The created `DownloadRequest`.
+@discardableResult
+public func download(
+    resumingWith resumeData: Data,
+    to destination: DownloadRequest.DownloadFileDestination? = nil)
+    -> DownloadRequest {
+    return SessionManager.default.download(resumingWith: resumeData, to: destination)
+}
+
+// MARK: - Upload Request
+
+// MARK: File
+
+/// Creates an `UploadRequest` using the default `SessionManager` from the specified `url`, `method` and `headers`
+/// for uploading the `file`.
+///
+/// - parameter file:    The file to upload.
+/// - parameter url:     The URL.
+/// - parameter method:  The HTTP method. `.post` by default.
+/// - parameter headers: The HTTP headers. `nil` by default.
+///
+/// - returns: The created `UploadRequest`.
+@discardableResult
+public func upload(
+    _ fileURL: URL,
+    to url: URLConvertible,
+    method: HTTPMethod = .post,
+    headers: HTTPHeaders? = nil)
+    -> UploadRequest {
+    return SessionManager.default.upload(fileURL, to: url, method: method, headers: headers)
+}
+
+/// Creates a `UploadRequest` using the default `SessionManager` from the specified `urlRequest` for
+/// uploading the `file`.
+///
+/// - parameter file:       The file to upload.
+/// - parameter urlRequest: The URL request.
+///
+/// - returns: The created `UploadRequest`.
+@discardableResult
+public func upload(_ fileURL: URL, with urlRequest: URLRequestConvertible) -> UploadRequest {
+    return SessionManager.default.upload(fileURL, with: urlRequest)
+}
+
+// MARK: Data
+
+/// Creates an `UploadRequest` using the default `SessionManager` from the specified `url`, `method` and `headers`
+/// for uploading the `data`.
+///
+/// - parameter data:    The data to upload.
+/// - parameter url:     The URL.
+/// - parameter method:  The HTTP method. `.post` by default.
+/// - parameter headers: The HTTP headers. `nil` by default.
+///
+/// - returns: The created `UploadRequest`.
+@discardableResult
+public func upload(
+    _ data: Data,
+    to url: URLConvertible,
+    method: HTTPMethod = .post,
+    headers: HTTPHeaders? = nil)
+    -> UploadRequest {
+    return SessionManager.default.upload(data, to: url, method: method, headers: headers)
+}
+
+/// Creates an `UploadRequest` using the default `SessionManager` from the specified `urlRequest` for
+/// uploading the `data`.
+///
+/// - parameter data:       The data to upload.
+/// - parameter urlRequest: The URL request.
+///
+/// - returns: The created `UploadRequest`.
+@discardableResult
+public func upload(_ data: Data, with urlRequest: URLRequestConvertible) -> UploadRequest {
+    return SessionManager.default.upload(data, with: urlRequest)
+}
+
+// MARK: InputStream
+
+/// Creates an `UploadRequest` using the default `SessionManager` from the specified `url`, `method` and `headers`
+/// for uploading the `stream`.
+///
+/// - parameter stream:  The stream to upload.
+/// - parameter url:     The URL.
+/// - parameter method:  The HTTP method. `.post` by default.
+/// - parameter headers: The HTTP headers. `nil` by default.
+///
+/// - returns: The created `UploadRequest`.
+@discardableResult
+public func upload(
+    _ stream: InputStream,
+    to url: URLConvertible,
+    method: HTTPMethod = .post,
+    headers: HTTPHeaders? = nil)
+    -> UploadRequest {
+    return SessionManager.default.upload(stream, to: url, method: method, headers: headers)
+}
+
+/// Creates an `UploadRequest` using the default `SessionManager` from the specified `urlRequest` for
+/// uploading the `stream`.
+///
+/// - parameter urlRequest: The URL request.
+/// - parameter stream:     The stream to upload.
+///
+/// - returns: The created `UploadRequest`.
+@discardableResult
+public func upload(_ stream: InputStream, with urlRequest: URLRequestConvertible) -> UploadRequest {
+    return SessionManager.default.upload(stream, with: urlRequest)
+}
+
+// MARK: MultipartFormData
+
+/// Encodes `multipartFormData` using `encodingMemoryThreshold` with the default `SessionManager` and calls
+/// `encodingCompletion` with new `UploadRequest` using the `url`, `method` and `headers`.
+///
+/// It is important to understand the memory implications of uploading `MultipartFormData`. If the cummulative
+/// payload is small, encoding the data in-memory and directly uploading to a server is the by far the most
+/// efficient approach. However, if the payload is too large, encoding the data in-memory could cause your app to
+/// be terminated. Larger payloads must first be written to disk using input and output streams to keep the memory
+/// footprint low, then the data can be uploaded as a stream from the resulting file. Streaming from disk MUST be
+/// used for larger payloads such as video content.
+///
+/// The `encodingMemoryThreshold` parameter allows Alamofire to automatically determine whether to encode in-memory
+/// or stream from disk. If the content length of the `MultipartFormData` is below the `encodingMemoryThreshold`,
+/// encoding takes place in-memory. If the content length exceeds the threshold, the data is streamed to disk
+/// during the encoding process. Then the result is uploaded as data or as a stream depending on which encoding
+/// technique was used.
+///
+/// - parameter multipartFormData:       The closure used to append body parts to the `MultipartFormData`.
+/// - parameter encodingMemoryThreshold: The encoding memory threshold in bytes.
+///                                      `multipartFormDataEncodingMemoryThreshold` by default.
+/// - parameter url:                     The URL.
+/// - parameter method:                  The HTTP method. `.post` by default.
+/// - parameter headers:                 The HTTP headers. `nil` by default.
+/// - parameter encodingCompletion:      The closure called when the `MultipartFormData` encoding is complete.
+public func upload(
+    multipartFormData: @escaping (MultipartFormData) -> Void,
+    usingThreshold encodingMemoryThreshold: UInt64 = SessionManager.multipartFormDataEncodingMemoryThreshold,
+    to url: URLConvertible,
+    method: HTTPMethod = .post,
+    headers: HTTPHeaders? = nil,
+    encodingCompletion: ((SessionManager.MultipartFormDataEncodingResult) -> Void)?) {
+    return SessionManager.default.upload(
+        multipartFormData: multipartFormData,
+        usingThreshold: encodingMemoryThreshold,
+        to: url,
+        method: method,
+        headers: headers,
+        encodingCompletion: encodingCompletion
+    )
+}
+
+/// Encodes `multipartFormData` using `encodingMemoryThreshold` and the default `SessionManager` and
+/// calls `encodingCompletion` with new `UploadRequest` using the `urlRequest`.
+///
+/// It is important to understand the memory implications of uploading `MultipartFormData`. If the cummulative
+/// payload is small, encoding the data in-memory and directly uploading to a server is the by far the most
+/// efficient approach. However, if the payload is too large, encoding the data in-memory could cause your app to
+/// be terminated. Larger payloads must first be written to disk using input and output streams to keep the memory
+/// footprint low, then the data can be uploaded as a stream from the resulting file. Streaming from disk MUST be
+/// used for larger payloads such as video content.
+///
+/// The `encodingMemoryThreshold` parameter allows Alamofire to automatically determine whether to encode in-memory
+/// or stream from disk. If the content length of the `MultipartFormData` is below the `encodingMemoryThreshold`,
+/// encoding takes place in-memory. If the content length exceeds the threshold, the data is streamed to disk
+/// during the encoding process. Then the result is uploaded as data or as a stream depending on which encoding
+/// technique was used.
+///
+/// - parameter multipartFormData:       The closure used to append body parts to the `MultipartFormData`.
+/// - parameter encodingMemoryThreshold: The encoding memory threshold in bytes.
+///                                      `multipartFormDataEncodingMemoryThreshold` by default.
+/// - parameter urlRequest:              The URL request.
+/// - parameter encodingCompletion:      The closure called when the `MultipartFormData` encoding is complete.
+public func upload(
+    multipartFormData: @escaping (MultipartFormData) -> Void,
+    usingThreshold encodingMemoryThreshold: UInt64 = SessionManager.multipartFormDataEncodingMemoryThreshold,
+    with urlRequest: URLRequestConvertible,
+    encodingCompletion: ((SessionManager.MultipartFormDataEncodingResult) -> Void)?) {
+    return SessionManager.default.upload(
+        multipartFormData: multipartFormData,
+        usingThreshold: encodingMemoryThreshold,
+        with: urlRequest,
+        encodingCompletion: encodingCompletion
+    )
+}
+
+#if !os(watchOS)
+
+// MARK: - Stream Request
+
+// MARK: Hostname and Port
+
+/// Creates a `StreamRequest` using the default `SessionManager` for bidirectional streaming with the `hostname`
+/// and `port`.
+///
+/// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+///
+/// - parameter hostName: The hostname of the server to connect to.
+/// - parameter port:     The port of the server to connect to.
+///
+/// - returns: The created `StreamRequest`.
+@discardableResult
+@available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+public func stream(withHostName hostName: String, port: Int) -> StreamRequest {
+    return SessionManager.default.stream(withHostName: hostName, port: port)
+}
+
+// MARK: NetService
+
+/// Creates a `StreamRequest` using the default `SessionManager` for bidirectional streaming with the `netService`.
+///
+/// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+///
+/// - parameter netService: The net service used to identify the endpoint.
+///
+/// - returns: The created `StreamRequest`.
+@discardableResult
+@available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+public func stream(with netService: NetService) -> StreamRequest {
+    return SessionManager.default.stream(with: netService)
+}
+
+#endif

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/MultipartFormData.swift

@@ -0,0 +1,578 @@
+//
+//  MultipartFormData.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+#if os(iOS) || os(watchOS) || os(tvOS)
+import MobileCoreServices
+#elseif os(macOS)
+import CoreServices
+#endif
+
+/// Constructs `multipart/form-data` for uploads within an HTTP or HTTPS body. There are currently two ways to encode
+/// multipart form data. The first way is to encode the data directly in memory. This is very efficient, but can lead
+/// to memory issues if the dataset is too large. The second way is designed for larger datasets and will write all the
+/// data to a single file on disk with all the proper boundary segmentation. The second approach MUST be used for
+/// larger datasets such as video content, otherwise your app may run out of memory when trying to encode the dataset.
+///
+/// For more information on `multipart/form-data` in general, please refer to the RFC-2388 and RFC-2045 specs as well
+/// and the w3 form documentation.
+///
+/// - https://www.ietf.org/rfc/rfc2388.txt
+/// - https://www.ietf.org/rfc/rfc2045.txt
+/// - https://www.w3.org/TR/html401/interact/forms.html#h-17.13
+open class MultipartFormData {
+
+    // MARK: - Helper Types
+
+    struct EncodingCharacters {
+        static let crlf = "\r\n"
+    }
+
+    struct BoundaryGenerator {
+        enum BoundaryType {
+            case initial, encapsulated, final
+        }
+
+        static func randomBoundary() -> String {
+            return String(format: "alamofire.boundary.%08x%08x", arc4random(), arc4random())
+        }
+
+        static func boundaryData(forBoundaryType boundaryType: BoundaryType, boundary: String) -> Data {
+            let boundaryText: String
+
+            switch boundaryType {
+            case .initial:
+                boundaryText = "--\(boundary)\(EncodingCharacters.crlf)"
+            case .encapsulated:
+                boundaryText = "\(EncodingCharacters.crlf)--\(boundary)\(EncodingCharacters.crlf)"
+            case .final:
+                boundaryText = "\(EncodingCharacters.crlf)--\(boundary)--\(EncodingCharacters.crlf)"
+            }
+
+            return boundaryText.data(using: String.Encoding.utf8, allowLossyConversion: false)!
+        }
+    }
+
+    class BodyPart {
+        let headers: HTTPHeaders
+        let bodyStream: InputStream
+        let bodyContentLength: UInt64
+        var hasInitialBoundary = false
+        var hasFinalBoundary = false
+
+        init(headers: HTTPHeaders, bodyStream: InputStream, bodyContentLength: UInt64) {
+            self.headers = headers
+            self.bodyStream = bodyStream
+            self.bodyContentLength = bodyContentLength
+        }
+    }
+
+    // MARK: - Properties
+
+    /// The `Content-Type` header value containing the boundary used to generate the `multipart/form-data`.
+    open lazy var contentType: String = "multipart/form-data; boundary=\(self.boundary)"
+
+    /// The content length of all body parts used to generate the `multipart/form-data` not including the boundaries.
+    public var contentLength: UInt64 { return bodyParts.reduce(0) { $0 + $1.bodyContentLength } }
+
+    /// The boundary used to separate the body parts in the encoded form data.
+    public var boundary: String
+
+    private var bodyParts: [BodyPart]
+    private var bodyPartError: AFError?
+    private let streamBufferSize: Int
+
+    // MARK: - Lifecycle
+
+    /// Creates a multipart form data object.
+    ///
+    /// - returns: The multipart form data object.
+    public init() {
+        self.boundary = BoundaryGenerator.randomBoundary()
+        self.bodyParts = []
+
+        ///
+        /// The optimal read/write buffer size in bytes for input and output streams is 1024 (1KB). For more
+        /// information, please refer to the following article:
+        ///   - https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/Streams/Articles/ReadingInputStreams.html
+        ///
+
+        self.streamBufferSize = 1024
+    }
+
+    // MARK: - Body Parts
+
+    /// Creates a body part from the data and appends it to the multipart form data object.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - `Content-Disposition: form-data; name=#{name}` (HTTP Header)
+    /// - Encoded data
+    /// - Multipart form boundary
+    ///
+    /// - parameter data: The data to encode into the multipart form data.
+    /// - parameter name: The name to associate with the data in the `Content-Disposition` HTTP header.
+    public func append(_ data: Data, withName name: String) {
+        let headers = contentHeaders(withName: name)
+        let stream = InputStream(data: data)
+        let length = UInt64(data.count)
+
+        append(stream, withLength: length, headers: headers)
+    }
+
+    /// Creates a body part from the data and appends it to the multipart form data object.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - `Content-Disposition: form-data; name=#{name}` (HTTP Header)
+    /// - `Content-Type: #{generated mimeType}` (HTTP Header)
+    /// - Encoded data
+    /// - Multipart form boundary
+    ///
+    /// - parameter data:     The data to encode into the multipart form data.
+    /// - parameter name:     The name to associate with the data in the `Content-Disposition` HTTP header.
+    /// - parameter mimeType: The MIME type to associate with the data content type in the `Content-Type` HTTP header.
+    public func append(_ data: Data, withName name: String, mimeType: String) {
+        let headers = contentHeaders(withName: name, mimeType: mimeType)
+        let stream = InputStream(data: data)
+        let length = UInt64(data.count)
+
+        append(stream, withLength: length, headers: headers)
+    }
+
+    /// Creates a body part from the data and appends it to the multipart form data object.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - `Content-Disposition: form-data; name=#{name}; filename=#{filename}` (HTTP Header)
+    /// - `Content-Type: #{mimeType}` (HTTP Header)
+    /// - Encoded file data
+    /// - Multipart form boundary
+    ///
+    /// - parameter data:     The data to encode into the multipart form data.
+    /// - parameter name:     The name to associate with the data in the `Content-Disposition` HTTP header.
+    /// - parameter fileName: The filename to associate with the data in the `Content-Disposition` HTTP header.
+    /// - parameter mimeType: The MIME type to associate with the data in the `Content-Type` HTTP header.
+    public func append(_ data: Data, withName name: String, fileName: String, mimeType: String) {
+        let headers = contentHeaders(withName: name, fileName: fileName, mimeType: mimeType)
+        let stream = InputStream(data: data)
+        let length = UInt64(data.count)
+
+        append(stream, withLength: length, headers: headers)
+    }
+
+    /// Creates a body part from the file and appends it to the multipart form data object.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - `Content-Disposition: form-data; name=#{name}; filename=#{generated filename}` (HTTP Header)
+    /// - `Content-Type: #{generated mimeType}` (HTTP Header)
+    /// - Encoded file data
+    /// - Multipart form boundary
+    ///
+    /// The filename in the `Content-Disposition` HTTP header is generated from the last path component of the
+    /// `fileURL`. The `Content-Type` HTTP header MIME type is generated by mapping the `fileURL` extension to the
+    /// system associated MIME type.
+    ///
+    /// - parameter fileURL: The URL of the file whose content will be encoded into the multipart form data.
+    /// - parameter name:    The name to associate with the file content in the `Content-Disposition` HTTP header.
+    public func append(_ fileURL: URL, withName name: String) {
+        let fileName = fileURL.lastPathComponent
+        let pathExtension = fileURL.pathExtension
+
+        if !fileName.isEmpty && !pathExtension.isEmpty {
+            let mime = mimeType(forPathExtension: pathExtension)
+            append(fileURL, withName: name, fileName: fileName, mimeType: mime)
+        } else {
+            setBodyPartError(withReason: .bodyPartFilenameInvalid(in: fileURL))
+        }
+    }
+
+    /// Creates a body part from the file and appends it to the multipart form data object.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - Content-Disposition: form-data; name=#{name}; filename=#{filename} (HTTP Header)
+    /// - Content-Type: #{mimeType} (HTTP Header)
+    /// - Encoded file data
+    /// - Multipart form boundary
+    ///
+    /// - parameter fileURL:  The URL of the file whose content will be encoded into the multipart form data.
+    /// - parameter name:     The name to associate with the file content in the `Content-Disposition` HTTP header.
+    /// - parameter fileName: The filename to associate with the file content in the `Content-Disposition` HTTP header.
+    /// - parameter mimeType: The MIME type to associate with the file content in the `Content-Type` HTTP header.
+    public func append(_ fileURL: URL, withName name: String, fileName: String, mimeType: String) {
+        let headers = contentHeaders(withName: name, fileName: fileName, mimeType: mimeType)
+
+        //============================================================
+        //                 Check 1 - is file URL?
+        //============================================================
+
+        guard fileURL.isFileURL else {
+            setBodyPartError(withReason: .bodyPartURLInvalid(url: fileURL))
+            return
+        }
+
+        //============================================================
+        //              Check 2 - is file URL reachable?
+        //============================================================
+
+        do {
+            let isReachable = try fileURL.checkPromisedItemIsReachable()
+            guard isReachable else {
+                setBodyPartError(withReason: .bodyPartFileNotReachable(at: fileURL))
+                return
+            }
+        } catch {
+            setBodyPartError(withReason: .bodyPartFileNotReachableWithError(atURL: fileURL, error: error))
+            return
+        }
+
+        //============================================================
+        //            Check 3 - is file URL a directory?
+        //============================================================
+
+        var isDirectory: ObjCBool = false
+        let path = fileURL.path
+
+        guard FileManager.default.fileExists(atPath: path, isDirectory: &isDirectory) && !isDirectory.boolValue else {
+            setBodyPartError(withReason: .bodyPartFileIsDirectory(at: fileURL))
+            return
+        }
+
+        //============================================================
+        //          Check 4 - can the file size be extracted?
+        //============================================================
+
+        let bodyContentLength: UInt64
+
+        do {
+            guard let fileSize = try FileManager.default.attributesOfItem(atPath: path)[.size] as? NSNumber else {
+                setBodyPartError(withReason: .bodyPartFileSizeNotAvailable(at: fileURL))
+                return
+            }
+
+            bodyContentLength = fileSize.uint64Value
+        } catch {
+            setBodyPartError(withReason: .bodyPartFileSizeQueryFailedWithError(forURL: fileURL, error: error))
+            return
+        }
+
+        //============================================================
+        //       Check 5 - can a stream be created from file URL?
+        //============================================================
+
+        guard let stream = InputStream(url: fileURL) else {
+            setBodyPartError(withReason: .bodyPartInputStreamCreationFailed(for: fileURL))
+            return
+        }
+
+        append(stream, withLength: bodyContentLength, headers: headers)
+    }
+
+    /// Creates a body part from the stream and appends it to the multipart form data object.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - `Content-Disposition: form-data; name=#{name}; filename=#{filename}` (HTTP Header)
+    /// - `Content-Type: #{mimeType}` (HTTP Header)
+    /// - Encoded stream data
+    /// - Multipart form boundary
+    ///
+    /// - parameter stream:   The input stream to encode in the multipart form data.
+    /// - parameter length:   The content length of the stream.
+    /// - parameter name:     The name to associate with the stream content in the `Content-Disposition` HTTP header.
+    /// - parameter fileName: The filename to associate with the stream content in the `Content-Disposition` HTTP header.
+    /// - parameter mimeType: The MIME type to associate with the stream content in the `Content-Type` HTTP header.
+    public func append(
+        _ stream: InputStream,
+        withLength length: UInt64,
+        name: String,
+        fileName: String,
+        mimeType: String) {
+        let headers = contentHeaders(withName: name, fileName: fileName, mimeType: mimeType)
+        append(stream, withLength: length, headers: headers)
+    }
+
+    /// Creates a body part with the headers, stream and length and appends it to the multipart form data object.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - HTTP headers
+    /// - Encoded stream data
+    /// - Multipart form boundary
+    ///
+    /// - parameter stream:  The input stream to encode in the multipart form data.
+    /// - parameter length:  The content length of the stream.
+    /// - parameter headers: The HTTP headers for the body part.
+    public func append(_ stream: InputStream, withLength length: UInt64, headers: HTTPHeaders) {
+        let bodyPart = BodyPart(headers: headers, bodyStream: stream, bodyContentLength: length)
+        bodyParts.append(bodyPart)
+    }
+
+    // MARK: - Data Encoding
+
+    /// Encodes all the appended body parts into a single `Data` value.
+    ///
+    /// It is important to note that this method will load all the appended body parts into memory all at the same
+    /// time. This method should only be used when the encoded data will have a small memory footprint. For large data
+    /// cases, please use the `writeEncodedDataToDisk(fileURL:completionHandler:)` method.
+    ///
+    /// - throws: An `AFError` if encoding encounters an error.
+    ///
+    /// - returns: The encoded `Data` if encoding is successful.
+    public func encode() throws -> Data {
+        if let bodyPartError = bodyPartError {
+            throw bodyPartError
+        }
+
+        var encoded = Data()
+
+        bodyParts.first?.hasInitialBoundary = true
+        bodyParts.last?.hasFinalBoundary = true
+
+        for bodyPart in bodyParts {
+            let encodedData = try encode(bodyPart)
+            encoded.append(encodedData)
+        }
+
+        return encoded
+    }
+
+    /// Writes the appended body parts into the given file URL.
+    ///
+    /// This process is facilitated by reading and writing with input and output streams, respectively. Thus,
+    /// this approach is very memory efficient and should be used for large body part data.
+    ///
+    /// - parameter fileURL: The file URL to write the multipart form data into.
+    ///
+    /// - throws: An `AFError` if encoding encounters an error.
+    public func writeEncodedData(to fileURL: URL) throws {
+        if let bodyPartError = bodyPartError {
+            throw bodyPartError
+        }
+
+        if FileManager.default.fileExists(atPath: fileURL.path) {
+            throw AFError.multipartEncodingFailed(reason: .outputStreamFileAlreadyExists(at: fileURL))
+        } else if !fileURL.isFileURL {
+            throw AFError.multipartEncodingFailed(reason: .outputStreamURLInvalid(url: fileURL))
+        }
+
+        guard let outputStream = OutputStream(url: fileURL, append: false) else {
+            throw AFError.multipartEncodingFailed(reason: .outputStreamCreationFailed(for: fileURL))
+        }
+
+        outputStream.open()
+        defer { outputStream.close() }
+
+        self.bodyParts.first?.hasInitialBoundary = true
+        self.bodyParts.last?.hasFinalBoundary = true
+
+        for bodyPart in self.bodyParts {
+            try write(bodyPart, to: outputStream)
+        }
+    }
+
+    // MARK: - Private - Body Part Encoding
+
+    private func encode(_ bodyPart: BodyPart) throws -> Data {
+        var encoded = Data()
+
+        let initialData = bodyPart.hasInitialBoundary ? initialBoundaryData() : encapsulatedBoundaryData()
+        encoded.append(initialData)
+
+        let headerData = encodeHeaders(for: bodyPart)
+        encoded.append(headerData)
+
+        let bodyStreamData = try encodeBodyStream(for: bodyPart)
+        encoded.append(bodyStreamData)
+
+        if bodyPart.hasFinalBoundary {
+            encoded.append(finalBoundaryData())
+        }
+
+        return encoded
+    }
+
+    private func encodeHeaders(for bodyPart: BodyPart) -> Data {
+        var headerText = ""
+
+        for (key, value) in bodyPart.headers {
+            headerText += "\(key): \(value)\(EncodingCharacters.crlf)"
+        }
+        headerText += EncodingCharacters.crlf
+
+        return headerText.data(using: String.Encoding.utf8, allowLossyConversion: false)!
+    }
+
+    private func encodeBodyStream(for bodyPart: BodyPart) throws -> Data {
+        let inputStream = bodyPart.bodyStream
+        inputStream.open()
+        defer { inputStream.close() }
+
+        var encoded = Data()
+
+        while inputStream.hasBytesAvailable {
+            var buffer = [UInt8](repeating: 0, count: streamBufferSize)
+            let bytesRead = inputStream.read(&buffer, maxLength: streamBufferSize)
+
+            if let error = inputStream.streamError {
+                throw AFError.multipartEncodingFailed(reason: .inputStreamReadFailed(error: error))
+            }
+
+            if bytesRead > 0 {
+                encoded.append(buffer, count: bytesRead)
+            } else {
+                break
+            }
+        }
+
+        return encoded
+    }
+
+    // MARK: - Private - Writing Body Part to Output Stream
+
+    private func write(_ bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        try writeInitialBoundaryData(for: bodyPart, to: outputStream)
+        try writeHeaderData(for: bodyPart, to: outputStream)
+        try writeBodyStream(for: bodyPart, to: outputStream)
+        try writeFinalBoundaryData(for: bodyPart, to: outputStream)
+    }
+
+    private func writeInitialBoundaryData(for bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        let initialData = bodyPart.hasInitialBoundary ? initialBoundaryData() : encapsulatedBoundaryData()
+        return try write(initialData, to: outputStream)
+    }
+
+    private func writeHeaderData(for bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        let headerData = encodeHeaders(for: bodyPart)
+        return try write(headerData, to: outputStream)
+    }
+
+    private func writeBodyStream(for bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        let inputStream = bodyPart.bodyStream
+
+        inputStream.open()
+        defer { inputStream.close() }
+
+        while inputStream.hasBytesAvailable {
+            var buffer = [UInt8](repeating: 0, count: streamBufferSize)
+            let bytesRead = inputStream.read(&buffer, maxLength: streamBufferSize)
+
+            if let streamError = inputStream.streamError {
+                throw AFError.multipartEncodingFailed(reason: .inputStreamReadFailed(error: streamError))
+            }
+
+            if bytesRead > 0 {
+                if buffer.count != bytesRead {
+                    buffer = Array(buffer[0..<bytesRead])
+                }
+
+                try write(&buffer, to: outputStream)
+            } else {
+                break
+            }
+        }
+    }
+
+    private func writeFinalBoundaryData(for bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        if bodyPart.hasFinalBoundary {
+            return try write(finalBoundaryData(), to: outputStream)
+        }
+    }
+
+    // MARK: - Private - Writing Buffered Data to Output Stream
+
+    private func write(_ data: Data, to outputStream: OutputStream) throws {
+        var buffer = [UInt8](repeating: 0, count: data.count)
+        data.copyBytes(to: &buffer, count: data.count)
+
+        return try write(&buffer, to: outputStream)
+    }
+
+    private func write(_ buffer: inout [UInt8], to outputStream: OutputStream) throws {
+        var bytesToWrite = buffer.count
+
+        while bytesToWrite > 0, outputStream.hasSpaceAvailable {
+            let bytesWritten = outputStream.write(buffer, maxLength: bytesToWrite)
+
+            if let error = outputStream.streamError {
+                throw AFError.multipartEncodingFailed(reason: .outputStreamWriteFailed(error: error))
+            }
+
+            bytesToWrite -= bytesWritten
+
+            if bytesToWrite > 0 {
+                buffer = Array(buffer[bytesWritten..<buffer.count])
+            }
+        }
+    }
+
+    // MARK: - Private - Mime Type
+
+    private func mimeType(forPathExtension pathExtension: String) -> String {
+        if
+            let id = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, pathExtension as CFString, nil)?.takeRetainedValue(),
+            let contentType = UTTypeCopyPreferredTagWithClass(id, kUTTagClassMIMEType)?.takeRetainedValue()
+        {
+            return contentType as String
+        }
+
+        return "application/octet-stream"
+    }
+
+    // MARK: - Private - Content Headers
+
+    private func contentHeaders(withName name: String, fileName: String? = nil, mimeType: String? = nil) -> [String: String] {
+        var disposition = "form-data; name=\"\(name)\""
+        if let fileName = fileName { disposition += "; filename=\"\(fileName)\"" }
+
+        var headers = ["Content-Disposition": disposition]
+        if let mimeType = mimeType { headers["Content-Type"] = mimeType }
+
+        return headers
+    }
+
+    // MARK: - Private - Boundary Encoding
+
+    private func initialBoundaryData() -> Data {
+        return BoundaryGenerator.boundaryData(forBoundaryType: .initial, boundary: boundary)
+    }
+
+    private func encapsulatedBoundaryData() -> Data {
+        return BoundaryGenerator.boundaryData(forBoundaryType: .encapsulated, boundary: boundary)
+    }
+
+    private func finalBoundaryData() -> Data {
+        return BoundaryGenerator.boundaryData(forBoundaryType: .final, boundary: boundary)
+    }
+
+    // MARK: - Private - Errors
+
+    private func setBodyPartError(withReason reason: AFError.MultipartEncodingFailureReason) {
+        guard bodyPartError == nil else { return }
+        bodyPartError = AFError.multipartEncodingFailed(reason: reason)
+    }
+}

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/NetworkReachabilityManager.swift

@@ -0,0 +1,236 @@
+//
+//  NetworkReachabilityManager.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#if !os(watchOS)
+
+import Foundation
+import SystemConfiguration
+
+/// The `NetworkReachabilityManager` class listens for reachability changes of hosts and addresses for both WWAN and
+/// WiFi network interfaces.
+///
+/// Reachability can be used to determine background information about why a network operation failed, or to retry
+/// network requests when a connection is established. It should not be used to prevent a user from initiating a network
+/// request, as it's possible that an initial request may be required to establish reachability.
+open class NetworkReachabilityManager {
+    /// Defines the various states of network reachability.
+    ///
+    /// - unknown:      It is unknown whether the network is reachable.
+    /// - notReachable: The network is not reachable.
+    /// - reachable:    The network is reachable.
+    public enum NetworkReachabilityStatus {
+        case unknown
+        case notReachable
+        case reachable(ConnectionType)
+    }
+
+    /// Defines the various connection types detected by reachability flags.
+    ///
+    /// - ethernetOrWiFi: The connection type is either over Ethernet or WiFi.
+    /// - wwan:           The connection type is a WWAN connection.
+    public enum ConnectionType {
+        case ethernetOrWiFi
+        case wwan
+    }
+
+    /// A closure executed when the network reachability status changes. The closure takes a single argument: the
+    /// network reachability status.
+    public typealias Listener = (NetworkReachabilityStatus) -> Void
+
+    // MARK: - Properties
+
+    /// Whether the network is currently reachable.
+    open var isReachable: Bool { return isReachableOnWWAN || isReachableOnEthernetOrWiFi }
+
+    /// Whether the network is currently reachable over the WWAN interface.
+    open var isReachableOnWWAN: Bool { return networkReachabilityStatus == .reachable(.wwan) }
+
+    /// Whether the network is currently reachable over Ethernet or WiFi interface.
+    open var isReachableOnEthernetOrWiFi: Bool { return networkReachabilityStatus == .reachable(.ethernetOrWiFi) }
+
+    /// The current network reachability status.
+    open var networkReachabilityStatus: NetworkReachabilityStatus {
+        guard let flags = self.flags else { return .unknown }
+        return networkReachabilityStatusForFlags(flags)
+    }
+
+    /// The dispatch queue to execute the `listener` closure on.
+    open var listenerQueue: DispatchQueue = DispatchQueue.main
+
+    /// A closure executed when the network reachability status changes.
+    open var listener: Listener?
+
+    open var flags: SCNetworkReachabilityFlags? {
+        var flags = SCNetworkReachabilityFlags()
+
+        if SCNetworkReachabilityGetFlags(reachability, &flags) {
+            return flags
+        }
+
+        return nil
+    }
+
+    private let reachability: SCNetworkReachability
+    open var previousFlags: SCNetworkReachabilityFlags
+
+    // MARK: - Initialization
+
+    /// Creates a `NetworkReachabilityManager` instance with the specified host.
+    ///
+    /// - parameter host: The host used to evaluate network reachability.
+    ///
+    /// - returns: The new `NetworkReachabilityManager` instance.
+    public convenience init?(host: String) {
+        guard let reachability = SCNetworkReachabilityCreateWithName(nil, host) else { return nil }
+        self.init(reachability: reachability)
+    }
+
+    /// Creates a `NetworkReachabilityManager` instance that monitors the address 0.0.0.0.
+    ///
+    /// Reachability treats the 0.0.0.0 address as a special token that causes it to monitor the general routing
+    /// status of the device, both IPv4 and IPv6.
+    ///
+    /// - returns: The new `NetworkReachabilityManager` instance.
+    public convenience init?() {
+        var address = sockaddr_in()
+        address.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
+        address.sin_family = sa_family_t(AF_INET)
+
+        guard let reachability = withUnsafePointer(to: &address, { pointer in
+            return pointer.withMemoryRebound(to: sockaddr.self, capacity: MemoryLayout<sockaddr>.size) {
+                return SCNetworkReachabilityCreateWithAddress(nil, $0)
+            }
+        }) else { return nil }
+
+        self.init(reachability: reachability)
+    }
+
+    private init(reachability: SCNetworkReachability) {
+        self.reachability = reachability
+
+        // Set the previous flags to an unreserved value to represent unknown status
+        self.previousFlags = SCNetworkReachabilityFlags(rawValue: 1 << 30)
+    }
+
+    deinit {
+        stopListening()
+    }
+
+    // MARK: - Listening
+
+    /// Starts listening for changes in network reachability status.
+    ///
+    /// - returns: `true` if listening was started successfully, `false` otherwise.
+    @discardableResult
+    open func startListening() -> Bool {
+        var context = SCNetworkReachabilityContext(version: 0, info: nil, retain: nil, release: nil, copyDescription: nil)
+        context.info = Unmanaged.passUnretained(self).toOpaque()
+
+        let callbackEnabled = SCNetworkReachabilitySetCallback(
+            reachability, { (_, flags, info) in
+                let reachability = Unmanaged<NetworkReachabilityManager>.fromOpaque(info!).takeUnretainedValue()
+                reachability.notifyListener(flags)
+            },
+            &context
+        )
+
+        let queueEnabled = SCNetworkReachabilitySetDispatchQueue(reachability, listenerQueue)
+
+        listenerQueue.async {
+            self.previousFlags = SCNetworkReachabilityFlags(rawValue: 1 << 30)
+
+            guard let flags = self.flags else { return }
+
+            self.notifyListener(flags)
+        }
+
+        return callbackEnabled && queueEnabled
+    }
+
+    /// Stops listening for changes in network reachability status.
+    open func stopListening() {
+        SCNetworkReachabilitySetCallback(reachability, nil, nil)
+        SCNetworkReachabilitySetDispatchQueue(reachability, nil)
+    }
+
+    // MARK: - Internal - Listener Notification
+
+    func notifyListener(_ flags: SCNetworkReachabilityFlags) {
+        guard previousFlags != flags else { return }
+        previousFlags = flags
+
+        listener?(networkReachabilityStatusForFlags(flags))
+    }
+
+    // MARK: - Internal - Network Reachability Status
+
+    func networkReachabilityStatusForFlags(_ flags: SCNetworkReachabilityFlags) -> NetworkReachabilityStatus {
+        guard isNetworkReachable(with: flags) else { return .notReachable }
+
+        var networkStatus: NetworkReachabilityStatus = .reachable(.ethernetOrWiFi)
+
+    #if os(iOS)
+        if flags.contains(.isWWAN) { networkStatus = .reachable(.wwan) }
+    #endif
+
+        return networkStatus
+    }
+
+    func isNetworkReachable(with flags: SCNetworkReachabilityFlags) -> Bool {
+        let isReachable = flags.contains(.reachable)
+        let needsConnection = flags.contains(.connectionRequired)
+        let canConnectAutomatically = flags.contains(.connectionOnDemand) || flags.contains(.connectionOnTraffic)
+        let canConnectWithoutUserInteraction = canConnectAutomatically && !flags.contains(.interventionRequired)
+
+        return isReachable && (!needsConnection || canConnectWithoutUserInteraction)
+    }
+}
+
+// MARK: -
+
+extension NetworkReachabilityManager.NetworkReachabilityStatus: Equatable {}
+
+/// Returns whether the two network reachability status values are equal.
+///
+/// - parameter lhs: The left-hand side value to compare.
+/// - parameter rhs: The right-hand side value to compare.
+///
+/// - returns: `true` if the two values are equal, `false` otherwise.
+public func ==(
+    lhs: NetworkReachabilityManager.NetworkReachabilityStatus,
+    rhs: NetworkReachabilityManager.NetworkReachabilityStatus)
+    -> Bool {
+    switch (lhs, rhs) {
+    case (.unknown, .unknown):
+        return true
+    case (.notReachable, .notReachable):
+        return true
+    case let (.reachable(lhsConnectionType), .reachable(rhsConnectionType)):
+        return lhsConnectionType == rhsConnectionType
+    default:
+        return false
+    }
+}
+
+#endif

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/ParameterEncoding.swift

@@ -0,0 +1,482 @@
+//
+//  ParameterEncoding.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// HTTP method definitions.
+///
+/// See https://tools.ietf.org/html/rfc7231#section-4.3
+public enum HTTPMethod: String {
+    case options = "OPTIONS"
+    case get     = "GET"
+    case head    = "HEAD"
+    case post    = "POST"
+    case put     = "PUT"
+    case patch   = "PATCH"
+    case delete  = "DELETE"
+    case trace   = "TRACE"
+    case connect = "CONNECT"
+}
+
+// MARK: -
+
+/// A dictionary of parameters to apply to a `URLRequest`.
+public typealias Parameters = [String: Any]
+
+/// A type used to define how a set of parameters are applied to a `URLRequest`.
+public protocol ParameterEncoding {
+    /// Creates a URL request by encoding parameters and applying them onto an existing request.
+    ///
+    /// - parameter urlRequest: The request to have parameters applied.
+    /// - parameter parameters: The parameters to apply.
+    ///
+    /// - throws: An `AFError.parameterEncodingFailed` error if encoding fails.
+    ///
+    /// - returns: The encoded request.
+    func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest
+}
+
+// MARK: -
+
+/// Creates a url-encoded query string to be set as or appended to any existing URL query string or set as the HTTP
+/// body of the URL request. Whether the query string is set or appended to any existing URL query string or set as
+/// the HTTP body depends on the destination of the encoding.
+///
+/// The `Content-Type` HTTP header field of an encoded request with HTTP body is set to
+/// `application/x-www-form-urlencoded; charset=utf-8`.
+///
+/// There is no published specification for how to encode collection types. By default the convention of appending
+/// `[]` to the key for array values (`foo[]=1&foo[]=2`), and appending the key surrounded by square brackets for
+/// nested dictionary values (`foo[bar]=baz`) is used. Optionally, `ArrayEncoding` can be used to omit the
+/// square brackets appended to array keys.
+///
+/// `BoolEncoding` can be used to configure how boolean values are encoded. The default behavior is to encode
+/// `true` as 1 and `false` as 0.
+public struct URLEncoding: ParameterEncoding {
+
+    // MARK: Helper Types
+
+    /// Defines whether the url-encoded query string is applied to the existing query string or HTTP body of the
+    /// resulting URL request.
+    ///
+    /// - methodDependent: Applies encoded query string result to existing query string for `GET`, `HEAD` and `DELETE`
+    ///                    requests and sets as the HTTP body for requests with any other HTTP method.
+    /// - queryString:     Sets or appends encoded query string result to existing query string.
+    /// - httpBody:        Sets encoded query string result as the HTTP body of the URL request.
+    public enum Destination {
+        case methodDependent, queryString, httpBody
+    }
+
+    /// Configures how `Array` parameters are encoded.
+    ///
+    /// - brackets:        An empty set of square brackets is appended to the key for every value.
+    ///                    This is the default behavior.
+    /// - noBrackets:      No brackets are appended. The key is encoded as is.
+    public enum ArrayEncoding {
+        case brackets, noBrackets
+
+        func encode(key: String) -> String {
+            switch self {
+            case .brackets:
+                return "\(key)[]"
+            case .noBrackets:
+                return key
+            }
+        }
+    }
+
+    /// Configures how `Bool` parameters are encoded.
+    ///
+    /// - numeric:         Encode `true` as `1` and `false` as `0`. This is the default behavior.
+    /// - literal:         Encode `true` and `false` as string literals.
+    public enum BoolEncoding {
+        case numeric, literal
+
+        func encode(value: Bool) -> String {
+            switch self {
+            case .numeric:
+                return value ? "1" : "0"
+            case .literal:
+                return value ? "true" : "false"
+            }
+        }
+    }
+
+    // MARK: Properties
+
+    /// Returns a default `URLEncoding` instance.
+    public static var `default`: URLEncoding { return URLEncoding() }
+
+    /// Returns a `URLEncoding` instance with a `.methodDependent` destination.
+    public static var methodDependent: URLEncoding { return URLEncoding() }
+
+    /// Returns a `URLEncoding` instance with a `.queryString` destination.
+    public static var queryString: URLEncoding { return URLEncoding(destination: .queryString) }
+
+    /// Returns a `URLEncoding` instance with an `.httpBody` destination.
+    public static var httpBody: URLEncoding { return URLEncoding(destination: .httpBody) }
+
+    /// The destination defining where the encoded query string is to be applied to the URL request.
+    public let destination: Destination
+
+    /// The encoding to use for `Array` parameters.
+    public let arrayEncoding: ArrayEncoding
+
+    /// The encoding to use for `Bool` parameters.
+    public let boolEncoding: BoolEncoding
+
+    // MARK: Initialization
+
+    /// Creates a `URLEncoding` instance using the specified destination.
+    ///
+    /// - parameter destination: The destination defining where the encoded query string is to be applied.
+    /// - parameter arrayEncoding: The encoding to use for `Array` parameters.
+    /// - parameter boolEncoding: The encoding to use for `Bool` parameters.
+    ///
+    /// - returns: The new `URLEncoding` instance.
+    public init(destination: Destination = .methodDependent, arrayEncoding: ArrayEncoding = .brackets, boolEncoding: BoolEncoding = .numeric) {
+        self.destination = destination
+        self.arrayEncoding = arrayEncoding
+        self.boolEncoding = boolEncoding
+    }
+
+    // MARK: Encoding
+
+    /// Creates a URL request by encoding parameters and applying them onto an existing request.
+    ///
+    /// - parameter urlRequest: The request to have parameters applied.
+    /// - parameter parameters: The parameters to apply.
+    ///
+    /// - throws: An `Error` if the encoding process encounters an error.
+    ///
+    /// - returns: The encoded request.
+    public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
+        var urlRequest = try urlRequest.asURLRequest()
+
+        guard let parameters = parameters else { return urlRequest }
+
+        if let method = HTTPMethod(rawValue: urlRequest.httpMethod ?? "GET"), encodesParametersInURL(with: method) {
+            guard let url = urlRequest.url else {
+                throw AFError.parameterEncodingFailed(reason: .missingURL)
+            }
+
+            if var urlComponents = URLComponents(url: url, resolvingAgainstBaseURL: false), !parameters.isEmpty {
+                let percentEncodedQuery = (urlComponents.percentEncodedQuery.map { $0 + "&" } ?? "") + query(parameters)
+                urlComponents.percentEncodedQuery = percentEncodedQuery
+                urlRequest.url = urlComponents.url
+            }
+        } else {
+            if urlRequest.value(forHTTPHeaderField: "Content-Type") == nil {
+                urlRequest.setValue("application/x-www-form-urlencoded; charset=utf-8", forHTTPHeaderField: "Content-Type")
+            }
+
+            urlRequest.httpBody = query(parameters).data(using: .utf8, allowLossyConversion: false)
+        }
+
+        return urlRequest
+    }
+
+    /// Creates percent-escaped, URL encoded query string components from the given key-value pair using recursion.
+    ///
+    /// - parameter key:   The key of the query component.
+    /// - parameter value: The value of the query component.
+    ///
+    /// - returns: The percent-escaped, URL encoded query string components.
+    public func queryComponents(fromKey key: String, value: Any) -> [(String, String)] {
+        var components: [(String, String)] = []
+
+        if let dictionary = value as? [String: Any] {
+            for (nestedKey, value) in dictionary {
+                components += queryComponents(fromKey: "\(key)[\(nestedKey)]", value: value)
+            }
+        } else if let array = value as? [Any] {
+            for value in array {
+                components += queryComponents(fromKey: arrayEncoding.encode(key: key), value: value)
+            }
+        } else if let value = value as? NSNumber {
+            if value.isBool {
+                components.append((escape(key), escape(boolEncoding.encode(value: value.boolValue))))
+            } else {
+                components.append((escape(key), escape("\(value)")))
+            }
+        } else if let bool = value as? Bool {
+            components.append((escape(key), escape(boolEncoding.encode(value: bool))))
+        } else {
+            components.append((escape(key), escape("\(value)")))
+        }
+
+        return components
+    }
+
+    /// Returns a percent-escaped string following RFC 3986 for a query string key or value.
+    ///
+    /// RFC 3986 states that the following characters are "reserved" characters.
+    ///
+    /// - General Delimiters: ":", "#", "[", "]", "@", "?", "/"
+    /// - Sub-Delimiters: "!", "$", "&", "'", "(", ")", "*", "+", ",", ";", "="
+    ///
+    /// In RFC 3986 - Section 3.4, it states that the "?" and "/" characters should not be escaped to allow
+    /// query strings to include a URL. Therefore, all "reserved" characters with the exception of "?" and "/"
+    /// should be percent-escaped in the query string.
+    ///
+    /// - parameter string: The string to be percent-escaped.
+    ///
+    /// - returns: The percent-escaped string.
+    public func escape(_ string: String) -> String {
+        let generalDelimitersToEncode = ":#[]@" // does not include "?" or "/" due to RFC 3986 - Section 3.4
+        let subDelimitersToEncode = "!$&'()*+,;="
+
+        var allowedCharacterSet = CharacterSet.urlQueryAllowed
+        allowedCharacterSet.remove(charactersIn: "\(generalDelimitersToEncode)\(subDelimitersToEncode)")
+
+        var escaped = ""
+
+        //==========================================================================================================
+        //
+        //  Batching is required for escaping due to an internal bug in iOS 8.1 and 8.2. Encoding more than a few
+        //  hundred Chinese characters causes various malloc error crashes. To avoid this issue until iOS 8 is no
+        //  longer supported, batching MUST be used for encoding. This introduces roughly a 20% overhead. For more
+        //  info, please refer to:
+        //
+        //      - https://github.com/Alamofire/Alamofire/issues/206
+        //
+        //==========================================================================================================
+
+        if #available(iOS 8.3, *) {
+            escaped = string.addingPercentEncoding(withAllowedCharacters: allowedCharacterSet) ?? string
+        } else {
+            let batchSize = 50
+            var index = string.startIndex
+
+            while index != string.endIndex {
+                let startIndex = index
+                let endIndex = string.index(index, offsetBy: batchSize, limitedBy: string.endIndex) ?? string.endIndex
+                let range = startIndex..<endIndex
+
+                let substring = string[range]
+
+                escaped += substring.addingPercentEncoding(withAllowedCharacters: allowedCharacterSet) ?? String(substring)
+
+                index = endIndex
+            }
+        }
+
+        return escaped
+    }
+
+    private func query(_ parameters: [String: Any]) -> String {
+        var components: [(String, String)] = []
+
+        for key in parameters.keys.sorted(by: <) {
+            let value = parameters[key]!
+            components += queryComponents(fromKey: key, value: value)
+        }
+        return components.map { "\($0)=\($1)" }.joined(separator: "&")
+    }
+
+    private func encodesParametersInURL(with method: HTTPMethod) -> Bool {
+        switch destination {
+        case .queryString:
+            return true
+        case .httpBody:
+            return false
+        default:
+            break
+        }
+
+        switch method {
+        case .get, .head, .delete:
+            return true
+        default:
+            return false
+        }
+    }
+}
+
+// MARK: -
+
+/// Uses `JSONSerialization` to create a JSON representation of the parameters object, which is set as the body of the
+/// request. The `Content-Type` HTTP header field of an encoded request is set to `application/json`.
+public struct JSONEncoding: ParameterEncoding {
+
+    // MARK: Properties
+
+    /// Returns a `JSONEncoding` instance with default writing options.
+    public static var `default`: JSONEncoding { return JSONEncoding() }
+
+    /// Returns a `JSONEncoding` instance with `.prettyPrinted` writing options.
+    public static var prettyPrinted: JSONEncoding { return JSONEncoding(options: .prettyPrinted) }
+
+    /// The options for writing the parameters as JSON data.
+    public let options: JSONSerialization.WritingOptions
+
+    // MARK: Initialization
+
+    /// Creates a `JSONEncoding` instance using the specified options.
+    ///
+    /// - parameter options: The options for writing the parameters as JSON data.
+    ///
+    /// - returns: The new `JSONEncoding` instance.
+    public init(options: JSONSerialization.WritingOptions = []) {
+        self.options = options
+    }
+
+    // MARK: Encoding
+
+    /// Creates a URL request by encoding parameters and applying them onto an existing request.
+    ///
+    /// - parameter urlRequest: The request to have parameters applied.
+    /// - parameter parameters: The parameters to apply.
+    ///
+    /// - throws: An `Error` if the encoding process encounters an error.
+    ///
+    /// - returns: The encoded request.
+    public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
+        var urlRequest = try urlRequest.asURLRequest()
+
+        guard let parameters = parameters else { return urlRequest }
+
+        do {
+            let data = try JSONSerialization.data(withJSONObject: parameters, options: options)
+
+            if urlRequest.value(forHTTPHeaderField: "Content-Type") == nil {
+                urlRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
+            }
+
+            urlRequest.httpBody = data
+        } catch {
+            throw AFError.parameterEncodingFailed(reason: .jsonEncodingFailed(error: error))
+        }
+
+        return urlRequest
+    }
+
+    /// Creates a URL request by encoding the JSON object and setting the resulting data on the HTTP body.
+    ///
+    /// - parameter urlRequest: The request to apply the JSON object to.
+    /// - parameter jsonObject: The JSON object to apply to the request.
+    ///
+    /// - throws: An `Error` if the encoding process encounters an error.
+    ///
+    /// - returns: The encoded request.
+    public func encode(_ urlRequest: URLRequestConvertible, withJSONObject jsonObject: Any? = nil) throws -> URLRequest {
+        var urlRequest = try urlRequest.asURLRequest()
+
+        guard let jsonObject = jsonObject else { return urlRequest }
+
+        do {
+            let data = try JSONSerialization.data(withJSONObject: jsonObject, options: options)
+
+            if urlRequest.value(forHTTPHeaderField: "Content-Type") == nil {
+                urlRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
+            }
+
+            urlRequest.httpBody = data
+        } catch {
+            throw AFError.parameterEncodingFailed(reason: .jsonEncodingFailed(error: error))
+        }
+
+        return urlRequest
+    }
+}
+
+// MARK: -
+
+/// Uses `PropertyListSerialization` to create a plist representation of the parameters object, according to the
+/// associated format and write options values, which is set as the body of the request. The `Content-Type` HTTP header
+/// field of an encoded request is set to `application/x-plist`.
+public struct PropertyListEncoding: ParameterEncoding {
+
+    // MARK: Properties
+
+    /// Returns a default `PropertyListEncoding` instance.
+    public static var `default`: PropertyListEncoding { return PropertyListEncoding() }
+
+    /// Returns a `PropertyListEncoding` instance with xml formatting and default writing options.
+    public static var xml: PropertyListEncoding { return PropertyListEncoding(format: .xml) }
+
+    /// Returns a `PropertyListEncoding` instance with binary formatting and default writing options.
+    public static var binary: PropertyListEncoding { return PropertyListEncoding(format: .binary) }
+
+    /// The property list serialization format.
+    public let format: PropertyListSerialization.PropertyListFormat
+
+    /// The options for writing the parameters as plist data.
+    public let options: PropertyListSerialization.WriteOptions
+
+    // MARK: Initialization
+
+    /// Creates a `PropertyListEncoding` instance using the specified format and options.
+    ///
+    /// - parameter format:  The property list serialization format.
+    /// - parameter options: The options for writing the parameters as plist data.
+    ///
+    /// - returns: The new `PropertyListEncoding` instance.
+    public init(
+        format: PropertyListSerialization.PropertyListFormat = .xml,
+        options: PropertyListSerialization.WriteOptions = 0) {
+        self.format = format
+        self.options = options
+    }
+
+    // MARK: Encoding
+
+    /// Creates a URL request by encoding parameters and applying them onto an existing request.
+    ///
+    /// - parameter urlRequest: The request to have parameters applied.
+    /// - parameter parameters: The parameters to apply.
+    ///
+    /// - throws: An `Error` if the encoding process encounters an error.
+    ///
+    /// - returns: The encoded request.
+    public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
+        var urlRequest = try urlRequest.asURLRequest()
+
+        guard let parameters = parameters else { return urlRequest }
+
+        do {
+            let data = try PropertyListSerialization.data(
+                fromPropertyList: parameters,
+                format: format,
+                options: options
+            )
+
+            if urlRequest.value(forHTTPHeaderField: "Content-Type") == nil {
+                urlRequest.setValue("application/x-plist", forHTTPHeaderField: "Content-Type")
+            }
+
+            urlRequest.httpBody = data
+        } catch {
+            throw AFError.parameterEncodingFailed(reason: .propertyListEncodingFailed(error: error))
+        }
+
+        return urlRequest
+    }
+}
+
+// MARK: -
+
+extension NSNumber {
+    fileprivate var isBool: Bool { return CFBooleanGetTypeID() == CFGetTypeID(self) }
+}

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/Request.swift

@@ -0,0 +1,658 @@
+//
+//  Request.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// A type that can inspect and optionally adapt a `URLRequest` in some manner if necessary.
+public protocol RequestAdapter {
+    /// Inspects and adapts the specified `URLRequest` in some manner if necessary and returns the result.
+    ///
+    /// - parameter urlRequest: The URL request to adapt.
+    ///
+    /// - throws: An `Error` if the adaptation encounters an error.
+    ///
+    /// - returns: The adapted `URLRequest`.
+    func adapt(_ urlRequest: URLRequest) throws -> URLRequest
+}
+
+// MARK: -
+
+/// A closure executed when the `RequestRetrier` determines whether a `Request` should be retried or not.
+public typealias RequestRetryCompletion = (_ shouldRetry: Bool, _ timeDelay: TimeInterval) -> Void
+
+/// A type that determines whether a request should be retried after being executed by the specified session manager
+/// and encountering an error.
+public protocol RequestRetrier {
+    /// Determines whether the `Request` should be retried by calling the `completion` closure.
+    ///
+    /// This operation is fully asynchronous. Any amount of time can be taken to determine whether the request needs
+    /// to be retried. The one requirement is that the completion closure is called to ensure the request is properly
+    /// cleaned up after.
+    ///
+    /// - parameter manager:    The session manager the request was executed on.
+    /// - parameter request:    The request that failed due to the encountered error.
+    /// - parameter error:      The error encountered when executing the request.
+    /// - parameter completion: The completion closure to be executed when retry decision has been determined.
+    func should(_ manager: SessionManager, retry request: Request, with error: Error, completion: @escaping RequestRetryCompletion)
+}
+
+// MARK: -
+
+protocol TaskConvertible {
+    func task(session: URLSession, adapter: RequestAdapter?, queue: DispatchQueue) throws -> URLSessionTask
+}
+
+/// A dictionary of headers to apply to a `URLRequest`.
+public typealias HTTPHeaders = [String: String]
+
+// MARK: -
+
+/// Responsible for sending a request and receiving the response and associated data from the server, as well as
+/// managing its underlying `URLSessionTask`.
+open class Request {
+
+    // MARK: Helper Types
+
+    /// A closure executed when monitoring upload or download progress of a request.
+    public typealias ProgressHandler = (Progress) -> Void
+
+    enum RequestTask {
+        case data(TaskConvertible?, URLSessionTask?)
+        case download(TaskConvertible?, URLSessionTask?)
+        case upload(TaskConvertible?, URLSessionTask?)
+        case stream(TaskConvertible?, URLSessionTask?)
+    }
+
+    // MARK: Properties
+
+    /// The delegate for the underlying task.
+    open internal(set) var delegate: TaskDelegate {
+        get {
+            taskDelegateLock.lock() ; defer { taskDelegateLock.unlock() }
+            return taskDelegate
+        }
+        set {
+            taskDelegateLock.lock() ; defer { taskDelegateLock.unlock() }
+            taskDelegate = newValue
+        }
+    }
+
+    /// The underlying task.
+    open var task: URLSessionTask? { return delegate.task }
+
+    /// The session belonging to the underlying task.
+    public let session: URLSession
+
+    /// The request sent or to be sent to the server.
+    open var request: URLRequest? { return task?.originalRequest }
+
+    /// The response received from the server, if any.
+    open var response: HTTPURLResponse? { return task?.response as? HTTPURLResponse }
+
+    /// The number of times the request has been retried.
+    open internal(set) var retryCount: UInt = 0
+
+    let originalTask: TaskConvertible?
+
+    var startTime: CFAbsoluteTime?
+    var endTime: CFAbsoluteTime?
+
+    var validations: [() -> Void] = []
+
+    private var taskDelegate: TaskDelegate
+    private var taskDelegateLock = NSLock()
+
+    // MARK: Lifecycle
+
+    init(session: URLSession, requestTask: RequestTask, error: Error? = nil) {
+        self.session = session
+
+        switch requestTask {
+        case .data(let originalTask, let task):
+            taskDelegate = DataTaskDelegate(task: task)
+            self.originalTask = originalTask
+        case .download(let originalTask, let task):
+            taskDelegate = DownloadTaskDelegate(task: task)
+            self.originalTask = originalTask
+        case .upload(let originalTask, let task):
+            taskDelegate = UploadTaskDelegate(task: task)
+            self.originalTask = originalTask
+        case .stream(let originalTask, let task):
+            taskDelegate = TaskDelegate(task: task)
+            self.originalTask = originalTask
+        }
+
+        delegate.error = error
+        delegate.queue.addOperation { self.endTime = CFAbsoluteTimeGetCurrent() }
+    }
+
+    // MARK: Authentication
+
+    /// Associates an HTTP Basic credential with the request.
+    ///
+    /// - parameter user:        The user.
+    /// - parameter password:    The password.
+    /// - parameter persistence: The URL credential persistence. `.ForSession` by default.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    open func authenticate(
+        user: String,
+        password: String,
+        persistence: URLCredential.Persistence = .forSession)
+        -> Self {
+        let credential = URLCredential(user: user, password: password, persistence: persistence)
+        return authenticate(usingCredential: credential)
+    }
+
+    /// Associates a specified credential with the request.
+    ///
+    /// - parameter credential: The credential.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    open func authenticate(usingCredential credential: URLCredential) -> Self {
+        delegate.credential = credential
+        return self
+    }
+
+    /// Returns a base64 encoded basic authentication credential as an authorization header tuple.
+    ///
+    /// - parameter user:     The user.
+    /// - parameter password: The password.
+    ///
+    /// - returns: A tuple with Authorization header and credential value if encoding succeeds, `nil` otherwise.
+    open class func authorizationHeader(user: String, password: String) -> (key: String, value: String)? {
+        guard let data = "\(user):\(password)".data(using: .utf8) else { return nil }
+
+        let credential = data.base64EncodedString(options: [])
+
+        return (key: "Authorization", value: "Basic \(credential)")
+    }
+
+    // MARK: State
+
+    /// Resumes the request.
+    open func resume() {
+        guard let task = task else { delegate.queue.isSuspended = false ; return }
+
+        if startTime == nil { startTime = CFAbsoluteTimeGetCurrent() }
+
+        task.resume()
+
+        NotificationCenter.default.post(
+            name: Notification.Name.Task.DidResume,
+            object: self,
+            userInfo: [Notification.Key.Task: task]
+        )
+    }
+
+    /// Suspends the request.
+    open func suspend() {
+        guard let task = task else { return }
+
+        task.suspend()
+
+        NotificationCenter.default.post(
+            name: Notification.Name.Task.DidSuspend,
+            object: self,
+            userInfo: [Notification.Key.Task: task]
+        )
+    }
+
+    /// Cancels the request.
+    open func cancel() {
+        guard let task = task else { return }
+
+        task.cancel()
+
+        NotificationCenter.default.post(
+            name: Notification.Name.Task.DidCancel,
+            object: self,
+            userInfo: [Notification.Key.Task: task]
+        )
+    }
+}
+
+// MARK: - CustomStringConvertible
+
+extension Request: CustomStringConvertible {
+    /// The textual representation used when written to an output stream, which includes the HTTP method and URL, as
+    /// well as the response status code if a response has been received.
+    open var description: String {
+        var components: [String] = []
+
+        if let HTTPMethod = request?.httpMethod {
+            components.append(HTTPMethod)
+        }
+
+        if let urlString = request?.url?.absoluteString {
+            components.append(urlString)
+        }
+
+        if let response = response {
+            components.append("(\(response.statusCode))")
+        }
+
+        return components.joined(separator: " ")
+    }
+}
+
+// MARK: - CustomDebugStringConvertible
+
+extension Request: CustomDebugStringConvertible {
+    /// The textual representation used when written to an output stream, in the form of a cURL command.
+    open var debugDescription: String {
+        return cURLRepresentation()
+    }
+
+    func cURLRepresentation() -> String {
+        var components = ["$ curl -v"]
+
+        guard let request = self.request,
+              let url = request.url,
+              let host = url.host
+        else {
+            return "$ curl command could not be created"
+        }
+
+        if let httpMethod = request.httpMethod, httpMethod != "GET" {
+            components.append("-X \(httpMethod)")
+        }
+
+        if let credentialStorage = self.session.configuration.urlCredentialStorage {
+            let protectionSpace = URLProtectionSpace(
+                host: host,
+                port: url.port ?? 0,
+                protocol: url.scheme,
+                realm: host,
+                authenticationMethod: NSURLAuthenticationMethodHTTPBasic
+            )
+
+            if let credentials = credentialStorage.credentials(for: protectionSpace)?.values {
+                for credential in credentials {
+                    guard let user = credential.user, let password = credential.password else { continue }
+                    components.append("-u \(user):\(password)")
+                }
+            } else {
+                if let credential = delegate.credential, let user = credential.user, let password = credential.password {
+                    components.append("-u \(user):\(password)")
+                }
+            }
+        }
+
+        if session.configuration.httpShouldSetCookies {
+            if
+                let cookieStorage = session.configuration.httpCookieStorage,
+                let cookies = cookieStorage.cookies(for: url), !cookies.isEmpty
+            {
+                let string = cookies.reduce("") { $0 + "\($1.name)=\($1.value);" }
+
+            #if swift(>=3.2)
+                components.append("-b \"\(string[..<string.index(before: string.endIndex)])\"")
+            #else
+                components.append("-b \"\(string.substring(to: string.characters.index(before: string.endIndex)))\"")
+            #endif
+            }
+        }
+
+        var headers: [AnyHashable: Any] = [:]
+
+        session.configuration.httpAdditionalHeaders?.filter {  $0.0 != AnyHashable("Cookie") }
+                                                    .forEach { headers[$0.0] = $0.1 }
+
+        request.allHTTPHeaderFields?.filter { $0.0 != "Cookie" }
+                                    .forEach { headers[$0.0] = $0.1 }
+
+        components += headers.map {
+            let escapedValue = String(describing: $0.value).replacingOccurrences(of: "\"", with: "\\\"")
+
+            return "-H \"\($0.key): \(escapedValue)\""
+        }
+
+        if let httpBodyData = request.httpBody, let httpBody = String(data: httpBodyData, encoding: .utf8) {
+            var escapedBody = httpBody.replacingOccurrences(of: "\\\"", with: "\\\\\"")
+            escapedBody = escapedBody.replacingOccurrences(of: "\"", with: "\\\"")
+
+            components.append("-d \"\(escapedBody)\"")
+        }
+
+        components.append("\"\(url.absoluteString)\"")
+
+        return components.joined(separator: " \\\n\t")
+    }
+}
+
+// MARK: -
+
+/// Specific type of `Request` that manages an underlying `URLSessionDataTask`.
+open class DataRequest: Request {
+
+    // MARK: Helper Types
+
+    struct Requestable: TaskConvertible {
+        let urlRequest: URLRequest
+
+        func task(session: URLSession, adapter: RequestAdapter?, queue: DispatchQueue) throws -> URLSessionTask {
+            do {
+                let urlRequest = try self.urlRequest.adapt(using: adapter)
+                return queue.sync { session.dataTask(with: urlRequest) }
+            } catch {
+                throw AdaptError(error: error)
+            }
+        }
+    }
+
+    // MARK: Properties
+
+    /// The request sent or to be sent to the server.
+    open override var request: URLRequest? {
+        if let request = super.request { return request }
+        if let requestable = originalTask as? Requestable { return requestable.urlRequest }
+
+        return nil
+    }
+
+    /// The progress of fetching the response data from the server for the request.
+    open var progress: Progress { return dataDelegate.progress }
+
+    var dataDelegate: DataTaskDelegate { return delegate as! DataTaskDelegate }
+
+    // MARK: Stream
+
+    /// Sets a closure to be called periodically during the lifecycle of the request as data is read from the server.
+    ///
+    /// This closure returns the bytes most recently received from the server, not including data from previous calls.
+    /// If this closure is set, data will only be available within this closure, and will not be saved elsewhere. It is
+    /// also important to note that the server data in any `Response` object will be `nil`.
+    ///
+    /// - parameter closure: The code to be executed periodically during the lifecycle of the request.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    open func stream(closure: ((Data) -> Void)? = nil) -> Self {
+        dataDelegate.dataStream = closure
+        return self
+    }
+
+    // MARK: Progress
+
+    /// Sets a closure to be called periodically during the lifecycle of the `Request` as data is read from the server.
+    ///
+    /// - parameter queue:   The dispatch queue to execute the closure on.
+    /// - parameter closure: The code to be executed periodically as data is read from the server.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    open func downloadProgress(queue: DispatchQueue = DispatchQueue.main, closure: @escaping ProgressHandler) -> Self {
+        dataDelegate.progressHandler = (closure, queue)
+        return self
+    }
+}
+
+// MARK: -
+
+/// Specific type of `Request` that manages an underlying `URLSessionDownloadTask`.
+open class DownloadRequest: Request {
+
+    // MARK: Helper Types
+
+    /// A collection of options to be executed prior to moving a downloaded file from the temporary URL to the
+    /// destination URL.
+    public struct DownloadOptions: OptionSet {
+        /// Returns the raw bitmask value of the option and satisfies the `RawRepresentable` protocol.
+        public let rawValue: UInt
+
+        /// A `DownloadOptions` flag that creates intermediate directories for the destination URL if specified.
+        public static let createIntermediateDirectories = DownloadOptions(rawValue: 1 << 0)
+
+        /// A `DownloadOptions` flag that removes a previous file from the destination URL if specified.
+        public static let removePreviousFile = DownloadOptions(rawValue: 1 << 1)
+
+        /// Creates a `DownloadFileDestinationOptions` instance with the specified raw value.
+        ///
+        /// - parameter rawValue: The raw bitmask value for the option.
+        ///
+        /// - returns: A new log level instance.
+        public init(rawValue: UInt) {
+            self.rawValue = rawValue
+        }
+    }
+
+    /// A closure executed once a download request has successfully completed in order to determine where to move the
+    /// temporary file written to during the download process. The closure takes two arguments: the temporary file URL
+    /// and the URL response, and returns a two arguments: the file URL where the temporary file should be moved and
+    /// the options defining how the file should be moved.
+    public typealias DownloadFileDestination = (
+        _ temporaryURL: URL,
+        _ response: HTTPURLResponse)
+        -> (destinationURL: URL, options: DownloadOptions)
+
+    enum Downloadable: TaskConvertible {
+        case request(URLRequest)
+        case resumeData(Data)
+
+        func task(session: URLSession, adapter: RequestAdapter?, queue: DispatchQueue) throws -> URLSessionTask {
+            do {
+                let task: URLSessionTask
+
+                switch self {
+                case let .request(urlRequest):
+                    let urlRequest = try urlRequest.adapt(using: adapter)
+                    task = queue.sync { session.downloadTask(with: urlRequest) }
+                case let .resumeData(resumeData):
+                    task = queue.sync { session.downloadTask(withResumeData: resumeData) }
+                }
+
+                return task
+            } catch {
+                throw AdaptError(error: error)
+            }
+        }
+    }
+
+    // MARK: Properties
+
+    /// The request sent or to be sent to the server.
+    open override var request: URLRequest? {
+        if let request = super.request { return request }
+
+        if let downloadable = originalTask as? Downloadable, case let .request(urlRequest) = downloadable {
+            return urlRequest
+        }
+
+        return nil
+    }
+
+    /// The resume data of the underlying download task if available after a failure.
+    open var resumeData: Data? { return downloadDelegate.resumeData }
+
+    /// The progress of downloading the response data from the server for the request.
+    open var progress: Progress { return downloadDelegate.progress }
+
+    var downloadDelegate: DownloadTaskDelegate { return delegate as! DownloadTaskDelegate }
+
+    // MARK: State
+
+    /// Cancels the request.
+    override open func cancel() {
+        cancel(createResumeData: true)
+    }
+
+    /// Cancels the request.
+    ///
+    /// - parameter createResumeData: Determines whether resume data is created via the underlying download task or not.
+    open func cancel(createResumeData: Bool) {
+        if createResumeData {
+            downloadDelegate.downloadTask.cancel { self.downloadDelegate.resumeData = $0 }
+        } else {
+            downloadDelegate.downloadTask.cancel()
+        }
+
+        NotificationCenter.default.post(
+            name: Notification.Name.Task.DidCancel,
+            object: self,
+            userInfo: [Notification.Key.Task: task as Any]
+        )
+    }
+
+    // MARK: Progress
+
+    /// Sets a closure to be called periodically during the lifecycle of the `Request` as data is read from the server.
+    ///
+    /// - parameter queue:   The dispatch queue to execute the closure on.
+    /// - parameter closure: The code to be executed periodically as data is read from the server.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    open func downloadProgress(queue: DispatchQueue = DispatchQueue.main, closure: @escaping ProgressHandler) -> Self {
+        downloadDelegate.progressHandler = (closure, queue)
+        return self
+    }
+
+    // MARK: Destination
+
+    /// Creates a download file destination closure which uses the default file manager to move the temporary file to a
+    /// file URL in the first available directory with the specified search path directory and search path domain mask.
+    ///
+    /// - parameter directory: The search path directory. `.DocumentDirectory` by default.
+    /// - parameter domain:    The search path domain mask. `.UserDomainMask` by default.
+    ///
+    /// - returns: A download file destination closure.
+    open class func suggestedDownloadDestination(
+        for directory: FileManager.SearchPathDirectory = .documentDirectory,
+        in domain: FileManager.SearchPathDomainMask = .userDomainMask)
+        -> DownloadFileDestination {
+        return { temporaryURL, response in
+            let directoryURLs = FileManager.default.urls(for: directory, in: domain)
+
+            if !directoryURLs.isEmpty {
+                return (directoryURLs[0].appendingPathComponent(response.suggestedFilename!), [])
+            }
+
+            return (temporaryURL, [])
+        }
+    }
+}
+
+// MARK: -
+
+/// Specific type of `Request` that manages an underlying `URLSessionUploadTask`.
+open class UploadRequest: DataRequest {
+
+    // MARK: Helper Types
+
+    enum Uploadable: TaskConvertible {
+        case data(Data, URLRequest)
+        case file(URL, URLRequest)
+        case stream(InputStream, URLRequest)
+
+        func task(session: URLSession, adapter: RequestAdapter?, queue: DispatchQueue) throws -> URLSessionTask {
+            do {
+                let task: URLSessionTask
+
+                switch self {
+                case let .data(data, urlRequest):
+                    let urlRequest = try urlRequest.adapt(using: adapter)
+                    task = queue.sync { session.uploadTask(with: urlRequest, from: data) }
+                case let .file(url, urlRequest):
+                    let urlRequest = try urlRequest.adapt(using: adapter)
+                    task = queue.sync { session.uploadTask(with: urlRequest, fromFile: url) }
+                case let .stream(_, urlRequest):
+                    let urlRequest = try urlRequest.adapt(using: adapter)
+                    task = queue.sync { session.uploadTask(withStreamedRequest: urlRequest) }
+                }
+
+                return task
+            } catch {
+                throw AdaptError(error: error)
+            }
+        }
+    }
+
+    // MARK: Properties
+
+    /// The request sent or to be sent to the server.
+    open override var request: URLRequest? {
+        if let request = super.request { return request }
+
+        guard let uploadable = originalTask as? Uploadable else { return nil }
+
+        switch uploadable {
+        case .data(_, let urlRequest), .file(_, let urlRequest), .stream(_, let urlRequest):
+            return urlRequest
+        }
+    }
+
+    /// The progress of uploading the payload to the server for the upload request.
+    open var uploadProgress: Progress { return uploadDelegate.uploadProgress }
+
+    var uploadDelegate: UploadTaskDelegate { return delegate as! UploadTaskDelegate }
+
+    // MARK: Upload Progress
+
+    /// Sets a closure to be called periodically during the lifecycle of the `UploadRequest` as data is sent to
+    /// the server.
+    ///
+    /// After the data is sent to the server, the `progress(queue:closure:)` APIs can be used to monitor the progress
+    /// of data being read from the server.
+    ///
+    /// - parameter queue:   The dispatch queue to execute the closure on.
+    /// - parameter closure: The code to be executed periodically as data is sent to the server.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    open func uploadProgress(queue: DispatchQueue = DispatchQueue.main, closure: @escaping ProgressHandler) -> Self {
+        uploadDelegate.uploadProgressHandler = (closure, queue)
+        return self
+    }
+}
+
+// MARK: -
+
+#if !os(watchOS)
+
+/// Specific type of `Request` that manages an underlying `URLSessionStreamTask`.
+@available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+open class StreamRequest: Request {
+    enum Streamable: TaskConvertible {
+        case stream(hostName: String, port: Int)
+        case netService(NetService)
+
+        func task(session: URLSession, adapter: RequestAdapter?, queue: DispatchQueue) throws -> URLSessionTask {
+            let task: URLSessionTask
+
+            switch self {
+            case let .stream(hostName, port):
+                task = queue.sync { session.streamTask(withHostName: hostName, port: port) }
+            case let .netService(netService):
+                task = queue.sync { session.streamTask(with: netService) }
+            }
+
+            return task
+        }
+    }
+}
+
+#endif

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/Response.swift

@@ -0,0 +1,563 @@
+//
+//  Response.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Used to store all data associated with an non-serialized response of a data or upload request.
+public struct DefaultDataResponse {
+    /// The URL request sent to the server.
+    public let request: URLRequest?
+
+    /// The server's response to the URL request.
+    public let response: HTTPURLResponse?
+
+    /// The data returned by the server.
+    public let data: Data?
+
+    /// The error encountered while executing or validating the request.
+    public let error: Error?
+
+    /// The timeline of the complete lifecycle of the request.
+    public let timeline: Timeline
+
+    var _metrics: AnyObject?
+
+    /// Creates a `DefaultDataResponse` instance from the specified parameters.
+    ///
+    /// - Parameters:
+    ///   - request:  The URL request sent to the server.
+    ///   - response: The server's response to the URL request.
+    ///   - data:     The data returned by the server.
+    ///   - error:    The error encountered while executing or validating the request.
+    ///   - timeline: The timeline of the complete lifecycle of the request. `Timeline()` by default.
+    ///   - metrics:  The task metrics containing the request / response statistics. `nil` by default.
+    public init(
+        request: URLRequest?,
+        response: HTTPURLResponse?,
+        data: Data?,
+        error: Error?,
+        timeline: Timeline = Timeline(),
+        metrics: AnyObject? = nil) {
+        self.request = request
+        self.response = response
+        self.data = data
+        self.error = error
+        self.timeline = timeline
+    }
+}
+
+// MARK: -
+
+/// Used to store all data associated with a serialized response of a data or upload request.
+public struct DataResponse<Value> {
+    /// The URL request sent to the server.
+    public let request: URLRequest?
+
+    /// The server's response to the URL request.
+    public let response: HTTPURLResponse?
+
+    /// The data returned by the server.
+    public let data: Data?
+
+    /// The result of response serialization.
+    public let result: Result<Value>
+
+    /// The timeline of the complete lifecycle of the request.
+    public let timeline: Timeline
+
+    /// Returns the associated value of the result if it is a success, `nil` otherwise.
+    public var value: Value? { return result.value }
+
+    /// Returns the associated error value if the result if it is a failure, `nil` otherwise.
+    public var error: Error? { return result.error }
+
+    var _metrics: AnyObject?
+
+    /// Creates a `DataResponse` instance with the specified parameters derived from response serialization.
+    ///
+    /// - parameter request:  The URL request sent to the server.
+    /// - parameter response: The server's response to the URL request.
+    /// - parameter data:     The data returned by the server.
+    /// - parameter result:   The result of response serialization.
+    /// - parameter timeline: The timeline of the complete lifecycle of the `Request`. Defaults to `Timeline()`.
+    ///
+    /// - returns: The new `DataResponse` instance.
+    public init(
+        request: URLRequest?,
+        response: HTTPURLResponse?,
+        data: Data?,
+        result: Result<Value>,
+        timeline: Timeline = Timeline()) {
+        self.request = request
+        self.response = response
+        self.data = data
+        self.result = result
+        self.timeline = timeline
+    }
+}
+
+// MARK: -
+
+extension DataResponse: CustomStringConvertible, CustomDebugStringConvertible {
+    /// The textual representation used when written to an output stream, which includes whether the result was a
+    /// success or failure.
+    public var description: String {
+        return result.debugDescription
+    }
+
+    /// The debug textual representation used when written to an output stream, which includes the URL request, the URL
+    /// response, the server data, the response serialization result and the timeline.
+    public var debugDescription: String {
+        var output: [String] = []
+
+        output.append(request != nil ? "[Request]: \(request!.httpMethod ?? "GET") \(request!)" : "[Request]: nil")
+        output.append(response != nil ? "[Response]: \(response!)" : "[Response]: nil")
+        output.append("[Data]: \(data?.count ?? 0) bytes")
+        output.append("[Result]: \(result.debugDescription)")
+        output.append("[Timeline]: \(timeline.debugDescription)")
+
+        return output.joined(separator: "\n")
+    }
+}
+
+// MARK: -
+
+extension DataResponse {
+    /// Evaluates the specified closure when the result of this `DataResponse` is a success, passing the unwrapped
+    /// result value as a parameter.
+    ///
+    /// Use the `map` method with a closure that does not throw. For example:
+    ///
+    ///     let possibleData: DataResponse<Data> = ...
+    ///     let possibleInt = possibleData.map { $0.count }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance's result.
+    ///
+    /// - returns: A `DataResponse` whose result wraps the value returned by the given closure. If this instance's
+    ///            result is a failure, returns a response wrapping the same failure.
+    public func map<T>(_ transform: (Value) -> T) -> DataResponse<T> {
+        var response = DataResponse<T>(
+            request: request,
+            response: self.response,
+            data: data,
+            result: result.map(transform),
+            timeline: timeline
+        )
+
+        response._metrics = _metrics
+
+        return response
+    }
+
+    /// Evaluates the given closure when the result of this `DataResponse` is a success, passing the unwrapped result
+    /// value as a parameter.
+    ///
+    /// Use the `flatMap` method with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: DataResponse<Data> = ...
+    ///     let possibleObject = possibleData.flatMap {
+    ///         try JSONSerialization.jsonObject(with: $0)
+    ///     }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance's result.
+    ///
+    /// - returns: A success or failure `DataResponse` depending on the result of the given closure. If this instance's
+    ///            result is a failure, returns the same failure.
+    public func flatMap<T>(_ transform: (Value) throws -> T) -> DataResponse<T> {
+        var response = DataResponse<T>(
+            request: request,
+            response: self.response,
+            data: data,
+            result: result.flatMap(transform),
+            timeline: timeline
+        )
+
+        response._metrics = _metrics
+
+        return response
+    }
+
+    /// Evaluates the specified closure when the `DataResponse` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `mapError` function with a closure that does not throw. For example:
+    ///
+    ///     let possibleData: DataResponse<Data> = ...
+    ///     let withMyError = possibleData.mapError { MyError.error($0) }
+    ///
+    /// - Parameter transform: A closure that takes the error of the instance.
+    /// - Returns: A `DataResponse` instance containing the result of the transform.
+    public func mapError<E: Error>(_ transform: (Error) -> E) -> DataResponse {
+        var response = DataResponse(
+            request: request,
+            response: self.response,
+            data: data,
+            result: result.mapError(transform),
+            timeline: timeline
+        )
+
+        response._metrics = _metrics
+
+        return response
+    }
+
+    /// Evaluates the specified closure when the `DataResponse` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `flatMapError` function with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: DataResponse<Data> = ...
+    ///     let possibleObject = possibleData.flatMapError {
+    ///         try someFailableFunction(taking: $0)
+    ///     }
+    ///
+    /// - Parameter transform: A throwing closure that takes the error of the instance.
+    ///
+    /// - Returns: A `DataResponse` instance containing the result of the transform.
+    public func flatMapError<E: Error>(_ transform: (Error) throws -> E) -> DataResponse {
+        var response = DataResponse(
+            request: request,
+            response: self.response,
+            data: data,
+            result: result.flatMapError(transform),
+            timeline: timeline
+        )
+
+        response._metrics = _metrics
+
+        return response
+    }
+}
+
+// MARK: -
+
+/// Used to store all data associated with an non-serialized response of a download request.
+public struct DefaultDownloadResponse {
+    /// The URL request sent to the server.
+    public let request: URLRequest?
+
+    /// The server's response to the URL request.
+    public let response: HTTPURLResponse?
+
+    /// The temporary destination URL of the data returned from the server.
+    public let temporaryURL: URL?
+
+    /// The final destination URL of the data returned from the server if it was moved.
+    public let destinationURL: URL?
+
+    /// The resume data generated if the request was cancelled.
+    public let resumeData: Data?
+
+    /// The error encountered while executing or validating the request.
+    public let error: Error?
+
+    /// The timeline of the complete lifecycle of the request.
+    public let timeline: Timeline
+
+    var _metrics: AnyObject?
+
+    /// Creates a `DefaultDownloadResponse` instance from the specified parameters.
+    ///
+    /// - Parameters:
+    ///   - request:        The URL request sent to the server.
+    ///   - response:       The server's response to the URL request.
+    ///   - temporaryURL:   The temporary destination URL of the data returned from the server.
+    ///   - destinationURL: The final destination URL of the data returned from the server if it was moved.
+    ///   - resumeData:     The resume data generated if the request was cancelled.
+    ///   - error:          The error encountered while executing or validating the request.
+    ///   - timeline:       The timeline of the complete lifecycle of the request. `Timeline()` by default.
+    ///   - metrics:        The task metrics containing the request / response statistics. `nil` by default.
+    public init(
+        request: URLRequest?,
+        response: HTTPURLResponse?,
+        temporaryURL: URL?,
+        destinationURL: URL?,
+        resumeData: Data?,
+        error: Error?,
+        timeline: Timeline = Timeline(),
+        metrics: AnyObject? = nil) {
+        self.request = request
+        self.response = response
+        self.temporaryURL = temporaryURL
+        self.destinationURL = destinationURL
+        self.resumeData = resumeData
+        self.error = error
+        self.timeline = timeline
+    }
+}
+
+// MARK: -
+
+/// Used to store all data associated with a serialized response of a download request.
+public struct DownloadResponse<Value> {
+    /// The URL request sent to the server.
+    public let request: URLRequest?
+
+    /// The server's response to the URL request.
+    public let response: HTTPURLResponse?
+
+    /// The temporary destination URL of the data returned from the server.
+    public let temporaryURL: URL?
+
+    /// The final destination URL of the data returned from the server if it was moved.
+    public let destinationURL: URL?
+
+    /// The resume data generated if the request was cancelled.
+    public let resumeData: Data?
+
+    /// The result of response serialization.
+    public let result: Result<Value>
+
+    /// The timeline of the complete lifecycle of the request.
+    public let timeline: Timeline
+
+    /// Returns the associated value of the result if it is a success, `nil` otherwise.
+    public var value: Value? { return result.value }
+
+    /// Returns the associated error value if the result if it is a failure, `nil` otherwise.
+    public var error: Error? { return result.error }
+
+    var _metrics: AnyObject?
+
+    /// Creates a `DownloadResponse` instance with the specified parameters derived from response serialization.
+    ///
+    /// - parameter request:        The URL request sent to the server.
+    /// - parameter response:       The server's response to the URL request.
+    /// - parameter temporaryURL:   The temporary destination URL of the data returned from the server.
+    /// - parameter destinationURL: The final destination URL of the data returned from the server if it was moved.
+    /// - parameter resumeData:     The resume data generated if the request was cancelled.
+    /// - parameter result:         The result of response serialization.
+    /// - parameter timeline:       The timeline of the complete lifecycle of the `Request`. Defaults to `Timeline()`.
+    ///
+    /// - returns: The new `DownloadResponse` instance.
+    public init(
+        request: URLRequest?,
+        response: HTTPURLResponse?,
+        temporaryURL: URL?,
+        destinationURL: URL?,
+        resumeData: Data?,
+        result: Result<Value>,
+        timeline: Timeline = Timeline()) {
+        self.request = request
+        self.response = response
+        self.temporaryURL = temporaryURL
+        self.destinationURL = destinationURL
+        self.resumeData = resumeData
+        self.result = result
+        self.timeline = timeline
+    }
+}
+
+// MARK: -
+
+extension DownloadResponse: CustomStringConvertible, CustomDebugStringConvertible {
+    /// The textual representation used when written to an output stream, which includes whether the result was a
+    /// success or failure.
+    public var description: String {
+        return result.debugDescription
+    }
+
+    /// The debug textual representation used when written to an output stream, which includes the URL request, the URL
+    /// response, the temporary and destination URLs, the resume data, the response serialization result and the
+    /// timeline.
+    public var debugDescription: String {
+        var output: [String] = []
+
+        output.append(request != nil ? "[Request]: \(request!.httpMethod ?? "GET") \(request!)" : "[Request]: nil")
+        output.append(response != nil ? "[Response]: \(response!)" : "[Response]: nil")
+        output.append("[TemporaryURL]: \(temporaryURL?.path ?? "nil")")
+        output.append("[DestinationURL]: \(destinationURL?.path ?? "nil")")
+        output.append("[ResumeData]: \(resumeData?.count ?? 0) bytes")
+        output.append("[Result]: \(result.debugDescription)")
+        output.append("[Timeline]: \(timeline.debugDescription)")
+
+        return output.joined(separator: "\n")
+    }
+}
+
+// MARK: -
+
+extension DownloadResponse {
+    /// Evaluates the given closure when the result of this `DownloadResponse` is a success, passing the unwrapped
+    /// result value as a parameter.
+    ///
+    /// Use the `map` method with a closure that does not throw. For example:
+    ///
+    ///     let possibleData: DownloadResponse<Data> = ...
+    ///     let possibleInt = possibleData.map { $0.count }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance's result.
+    ///
+    /// - returns: A `DownloadResponse` whose result wraps the value returned by the given closure. If this instance's
+    ///            result is a failure, returns a response wrapping the same failure.
+    public func map<T>(_ transform: (Value) -> T) -> DownloadResponse<T> {
+        var response = DownloadResponse<T>(
+            request: request,
+            response: self.response,
+            temporaryURL: temporaryURL,
+            destinationURL: destinationURL,
+            resumeData: resumeData,
+            result: result.map(transform),
+            timeline: timeline
+        )
+
+        response._metrics = _metrics
+
+        return response
+    }
+
+    /// Evaluates the given closure when the result of this `DownloadResponse` is a success, passing the unwrapped
+    /// result value as a parameter.
+    ///
+    /// Use the `flatMap` method with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: DownloadResponse<Data> = ...
+    ///     let possibleObject = possibleData.flatMap {
+    ///         try JSONSerialization.jsonObject(with: $0)
+    ///     }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance's result.
+    ///
+    /// - returns: A success or failure `DownloadResponse` depending on the result of the given closure. If this
+    /// instance's result is a failure, returns the same failure.
+    public func flatMap<T>(_ transform: (Value) throws -> T) -> DownloadResponse<T> {
+        var response = DownloadResponse<T>(
+            request: request,
+            response: self.response,
+            temporaryURL: temporaryURL,
+            destinationURL: destinationURL,
+            resumeData: resumeData,
+            result: result.flatMap(transform),
+            timeline: timeline
+        )
+
+        response._metrics = _metrics
+
+        return response
+    }
+
+    /// Evaluates the specified closure when the `DownloadResponse` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `mapError` function with a closure that does not throw. For example:
+    ///
+    ///     let possibleData: DownloadResponse<Data> = ...
+    ///     let withMyError = possibleData.mapError { MyError.error($0) }
+    ///
+    /// - Parameter transform: A closure that takes the error of the instance.
+    /// - Returns: A `DownloadResponse` instance containing the result of the transform.
+    public func mapError<E: Error>(_ transform: (Error) -> E) -> DownloadResponse {
+        var response = DownloadResponse(
+            request: request,
+            response: self.response,
+            temporaryURL: temporaryURL,
+            destinationURL: destinationURL,
+            resumeData: resumeData,
+            result: result.mapError(transform),
+            timeline: timeline
+        )
+
+        response._metrics = _metrics
+
+        return response
+    }
+
+    /// Evaluates the specified closure when the `DownloadResponse` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `flatMapError` function with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: DownloadResponse<Data> = ...
+    ///     let possibleObject = possibleData.flatMapError {
+    ///         try someFailableFunction(taking: $0)
+    ///     }
+    ///
+    /// - Parameter transform: A throwing closure that takes the error of the instance.
+    ///
+    /// - Returns: A `DownloadResponse` instance containing the result of the transform.
+    public func flatMapError<E: Error>(_ transform: (Error) throws -> E) -> DownloadResponse {
+        var response = DownloadResponse(
+            request: request,
+            response: self.response,
+            temporaryURL: temporaryURL,
+            destinationURL: destinationURL,
+            resumeData: resumeData,
+            result: result.flatMapError(transform),
+            timeline: timeline
+        )
+
+        response._metrics = _metrics
+
+        return response
+    }
+}
+
+// MARK: -
+
+protocol Response {
+    /// The task metrics containing the request / response statistics.
+    var _metrics: AnyObject? { get set }
+    mutating func add(_ metrics: AnyObject?)
+}
+
+extension Response {
+    mutating func add(_ metrics: AnyObject?) {
+        #if !os(watchOS)
+            guard #available(iOS 10.0, macOS 10.12, tvOS 10.0, *) else { return }
+            guard let metrics = metrics as? URLSessionTaskMetrics else { return }
+
+            _metrics = metrics
+        #endif
+    }
+}
+
+// MARK: -
+
+@available(iOS 10.0, macOS 10.12, tvOS 10.0, *)
+extension DefaultDataResponse: Response {
+#if !os(watchOS)
+    /// The task metrics containing the request / response statistics.
+    public var metrics: URLSessionTaskMetrics? { return _metrics as? URLSessionTaskMetrics }
+#endif
+}
+
+@available(iOS 10.0, macOS 10.12, tvOS 10.0, *)
+extension DataResponse: Response {
+#if !os(watchOS)
+    /// The task metrics containing the request / response statistics.
+    public var metrics: URLSessionTaskMetrics? { return _metrics as? URLSessionTaskMetrics }
+#endif
+}
+
+@available(iOS 10.0, macOS 10.12, tvOS 10.0, *)
+extension DefaultDownloadResponse: Response {
+#if !os(watchOS)
+    /// The task metrics containing the request / response statistics.
+    public var metrics: URLSessionTaskMetrics? { return _metrics as? URLSessionTaskMetrics }
+#endif
+}
+
+@available(iOS 10.0, macOS 10.12, tvOS 10.0, *)
+extension DownloadResponse: Response {
+#if !os(watchOS)
+    /// The task metrics containing the request / response statistics.
+    public var metrics: URLSessionTaskMetrics? { return _metrics as? URLSessionTaskMetrics }
+#endif
+}

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/ResponseSerialization.swift

@@ -0,0 +1,697 @@
+//
+//  ResponseSerialization.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// The type in which all data response serializers must conform to in order to serialize a response.
+public protocol DataResponseSerializerProtocol {
+    /// The type of serialized object to be created by this `DataResponseSerializerType`.
+    associatedtype SerializedObject
+
+    /// A closure used by response handlers that takes a request, response, data and error and returns a result.
+    var serializeResponse: (URLRequest?, HTTPURLResponse?, Data?, Error?) -> Result<SerializedObject> { get }
+}
+
+// MARK: -
+
+/// A generic `DataResponseSerializerType` used to serialize a request, response, and data into a serialized object.
+public struct DataResponseSerializer<Value>: DataResponseSerializerProtocol {
+    /// The type of serialized object to be created by this `DataResponseSerializer`.
+    public typealias SerializedObject = Value
+
+    /// A closure used by response handlers that takes a request, response, data and error and returns a result.
+    public var serializeResponse: (URLRequest?, HTTPURLResponse?, Data?, Error?) -> Result<Value>
+
+    /// Initializes the `ResponseSerializer` instance with the given serialize response closure.
+    ///
+    /// - parameter serializeResponse: The closure used to serialize the response.
+    ///
+    /// - returns: The new generic response serializer instance.
+    public init(serializeResponse: @escaping (URLRequest?, HTTPURLResponse?, Data?, Error?) -> Result<Value>) {
+        self.serializeResponse = serializeResponse
+    }
+}
+
+// MARK: -
+
+/// The type in which all download response serializers must conform to in order to serialize a response.
+public protocol DownloadResponseSerializerProtocol {
+    /// The type of serialized object to be created by this `DownloadResponseSerializerType`.
+    associatedtype SerializedObject
+
+    /// A closure used by response handlers that takes a request, response, url and error and returns a result.
+    var serializeResponse: (URLRequest?, HTTPURLResponse?, URL?, Error?) -> Result<SerializedObject> { get }
+}
+
+// MARK: -
+
+/// A generic `DownloadResponseSerializerType` used to serialize a request, response, and data into a serialized object.
+public struct DownloadResponseSerializer<Value>: DownloadResponseSerializerProtocol {
+    /// The type of serialized object to be created by this `DownloadResponseSerializer`.
+    public typealias SerializedObject = Value
+
+    /// A closure used by response handlers that takes a request, response, url and error and returns a result.
+    public var serializeResponse: (URLRequest?, HTTPURLResponse?, URL?, Error?) -> Result<Value>
+
+    /// Initializes the `ResponseSerializer` instance with the given serialize response closure.
+    ///
+    /// - parameter serializeResponse: The closure used to serialize the response.
+    ///
+    /// - returns: The new generic response serializer instance.
+    public init(serializeResponse: @escaping (URLRequest?, HTTPURLResponse?, URL?, Error?) -> Result<Value>) {
+        self.serializeResponse = serializeResponse
+    }
+}
+
+// MARK: - Timeline
+
+extension Request {
+    var timeline: Timeline {
+        let requestStartTime = self.startTime ?? CFAbsoluteTimeGetCurrent()
+        let requestCompletedTime = self.endTime ?? CFAbsoluteTimeGetCurrent()
+        let initialResponseTime = self.delegate.initialResponseTime ?? requestCompletedTime
+
+        return Timeline(
+            requestStartTime: requestStartTime,
+            initialResponseTime: initialResponseTime,
+            requestCompletedTime: requestCompletedTime,
+            serializationCompletedTime: CFAbsoluteTimeGetCurrent()
+        )
+    }
+}
+
+// MARK: - Default
+
+extension DataRequest {
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter queue:             The queue on which the completion handler is dispatched.
+    /// - parameter completionHandler: The code to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func response(queue: DispatchQueue? = nil, completionHandler: @escaping (DefaultDataResponse) -> Void) -> Self {
+        delegate.queue.addOperation {
+            (queue ?? DispatchQueue.main).async {
+                var dataResponse = DefaultDataResponse(
+                    request: self.request,
+                    response: self.response,
+                    data: self.delegate.data,
+                    error: self.delegate.error,
+                    timeline: self.timeline
+                )
+
+                dataResponse.add(self.delegate.metrics)
+
+                completionHandler(dataResponse)
+            }
+        }
+
+        return self
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter queue:              The queue on which the completion handler is dispatched.
+    /// - parameter responseSerializer: The response serializer responsible for serializing the request, response,
+    ///                                 and data.
+    /// - parameter completionHandler:  The code to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func response<T: DataResponseSerializerProtocol>(
+        queue: DispatchQueue? = nil,
+        responseSerializer: T,
+        completionHandler: @escaping (DataResponse<T.SerializedObject>) -> Void)
+        -> Self {
+        delegate.queue.addOperation {
+            let result = responseSerializer.serializeResponse(
+                self.request,
+                self.response,
+                self.delegate.data,
+                self.delegate.error
+            )
+
+            var dataResponse = DataResponse<T.SerializedObject>(
+                request: self.request,
+                response: self.response,
+                data: self.delegate.data,
+                result: result,
+                timeline: self.timeline
+            )
+
+            dataResponse.add(self.delegate.metrics)
+
+            (queue ?? DispatchQueue.main).async { completionHandler(dataResponse) }
+        }
+
+        return self
+    }
+}
+
+extension DownloadRequest {
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter queue:             The queue on which the completion handler is dispatched.
+    /// - parameter completionHandler: The code to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func response(
+        queue: DispatchQueue? = nil,
+        completionHandler: @escaping (DefaultDownloadResponse) -> Void)
+        -> Self {
+        delegate.queue.addOperation {
+            (queue ?? DispatchQueue.main).async {
+                var downloadResponse = DefaultDownloadResponse(
+                    request: self.request,
+                    response: self.response,
+                    temporaryURL: self.downloadDelegate.temporaryURL,
+                    destinationURL: self.downloadDelegate.destinationURL,
+                    resumeData: self.downloadDelegate.resumeData,
+                    error: self.downloadDelegate.error,
+                    timeline: self.timeline
+                )
+
+                downloadResponse.add(self.delegate.metrics)
+
+                completionHandler(downloadResponse)
+            }
+        }
+
+        return self
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter queue:              The queue on which the completion handler is dispatched.
+    /// - parameter responseSerializer: The response serializer responsible for serializing the request, response,
+    ///                                 and data contained in the destination url.
+    /// - parameter completionHandler:  The code to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func response<T: DownloadResponseSerializerProtocol>(
+        queue: DispatchQueue? = nil,
+        responseSerializer: T,
+        completionHandler: @escaping (DownloadResponse<T.SerializedObject>) -> Void)
+        -> Self {
+        delegate.queue.addOperation {
+            let result = responseSerializer.serializeResponse(
+                self.request,
+                self.response,
+                self.downloadDelegate.fileURL,
+                self.downloadDelegate.error
+            )
+
+            var downloadResponse = DownloadResponse<T.SerializedObject>(
+                request: self.request,
+                response: self.response,
+                temporaryURL: self.downloadDelegate.temporaryURL,
+                destinationURL: self.downloadDelegate.destinationURL,
+                resumeData: self.downloadDelegate.resumeData,
+                result: result,
+                timeline: self.timeline
+            )
+
+            downloadResponse.add(self.delegate.metrics)
+
+            (queue ?? DispatchQueue.main).async { completionHandler(downloadResponse) }
+        }
+
+        return self
+    }
+}
+
+// MARK: - Data
+
+extension Request {
+    /// Returns a result data type that contains the response data as-is.
+    ///
+    /// - parameter response: The response from the server.
+    /// - parameter data:     The data returned from the server.
+    /// - parameter error:    The error already encountered if it exists.
+    ///
+    /// - returns: The result data type.
+    public static func serializeResponseData(response: HTTPURLResponse?, data: Data?, error: Error?) -> Result<Data> {
+        guard error == nil else { return .failure(error!) }
+
+        if let response = response, emptyDataStatusCodes.contains(response.statusCode) { return .success(Data()) }
+
+        guard let validData = data else {
+            return .failure(AFError.responseSerializationFailed(reason: .inputDataNil))
+        }
+
+        return .success(validData)
+    }
+}
+
+extension DataRequest {
+    /// Creates a response serializer that returns the associated data as-is.
+    ///
+    /// - returns: A data response serializer.
+    public static func dataResponseSerializer() -> DataResponseSerializer<Data> {
+        return DataResponseSerializer { _, response, data, error in
+            return Request.serializeResponseData(response: response, data: data, error: error)
+        }
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter completionHandler: The code to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func responseData(
+        queue: DispatchQueue? = nil,
+        completionHandler: @escaping (DataResponse<Data>) -> Void)
+        -> Self {
+        return response(
+            queue: queue,
+            responseSerializer: DataRequest.dataResponseSerializer(),
+            completionHandler: completionHandler
+        )
+    }
+}
+
+extension DownloadRequest {
+    /// Creates a response serializer that returns the associated data as-is.
+    ///
+    /// - returns: A data response serializer.
+    public static func dataResponseSerializer() -> DownloadResponseSerializer<Data> {
+        return DownloadResponseSerializer { _, response, fileURL, error in
+            guard error == nil else { return .failure(error!) }
+
+            guard let fileURL = fileURL else {
+                return .failure(AFError.responseSerializationFailed(reason: .inputFileNil))
+            }
+
+            do {
+                let data = try Data(contentsOf: fileURL)
+                return Request.serializeResponseData(response: response, data: data, error: error)
+            } catch {
+                return .failure(AFError.responseSerializationFailed(reason: .inputFileReadFailed(at: fileURL)))
+            }
+        }
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter completionHandler: The code to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func responseData(
+        queue: DispatchQueue? = nil,
+        completionHandler: @escaping (DownloadResponse<Data>) -> Void)
+        -> Self {
+        return response(
+            queue: queue,
+            responseSerializer: DownloadRequest.dataResponseSerializer(),
+            completionHandler: completionHandler
+        )
+    }
+}
+
+// MARK: - String
+
+extension Request {
+    /// Returns a result string type initialized from the response data with the specified string encoding.
+    ///
+    /// - parameter encoding: The string encoding. If `nil`, the string encoding will be determined from the server
+    ///                       response, falling back to the default HTTP default character set, ISO-8859-1.
+    /// - parameter response: The response from the server.
+    /// - parameter data:     The data returned from the server.
+    /// - parameter error:    The error already encountered if it exists.
+    ///
+    /// - returns: The result data type.
+    public static func serializeResponseString(
+        encoding: String.Encoding?,
+        response: HTTPURLResponse?,
+        data: Data?,
+        error: Error?)
+        -> Result<String> {
+        guard error == nil else { return .failure(error!) }
+
+        if let response = response, emptyDataStatusCodes.contains(response.statusCode) { return .success("") }
+
+        guard let validData = data else {
+            return .failure(AFError.responseSerializationFailed(reason: .inputDataNil))
+        }
+
+        var convertedEncoding = encoding
+
+        if let encodingName = response?.textEncodingName as CFString?, convertedEncoding == nil {
+            convertedEncoding = String.Encoding(rawValue: CFStringConvertEncodingToNSStringEncoding(
+                CFStringConvertIANACharSetNameToEncoding(encodingName))
+            )
+        }
+
+        let actualEncoding = convertedEncoding ?? .isoLatin1
+
+        if let string = String(data: validData, encoding: actualEncoding) {
+            return .success(string)
+        } else {
+            return .failure(AFError.responseSerializationFailed(reason: .stringSerializationFailed(encoding: actualEncoding)))
+        }
+    }
+}
+
+extension DataRequest {
+    /// Creates a response serializer that returns a result string type initialized from the response data with
+    /// the specified string encoding.
+    ///
+    /// - parameter encoding: The string encoding. If `nil`, the string encoding will be determined from the server
+    ///                       response, falling back to the default HTTP default character set, ISO-8859-1.
+    ///
+    /// - returns: A string response serializer.
+    public static func stringResponseSerializer(encoding: String.Encoding? = nil) -> DataResponseSerializer<String> {
+        return DataResponseSerializer { _, response, data, error in
+            return Request.serializeResponseString(encoding: encoding, response: response, data: data, error: error)
+        }
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter encoding:          The string encoding. If `nil`, the string encoding will be determined from the
+    ///                                server response, falling back to the default HTTP default character set,
+    ///                                ISO-8859-1.
+    /// - parameter completionHandler: A closure to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func responseString(
+        queue: DispatchQueue? = nil,
+        encoding: String.Encoding? = nil,
+        completionHandler: @escaping (DataResponse<String>) -> Void)
+        -> Self {
+        return response(
+            queue: queue,
+            responseSerializer: DataRequest.stringResponseSerializer(encoding: encoding),
+            completionHandler: completionHandler
+        )
+    }
+}
+
+extension DownloadRequest {
+    /// Creates a response serializer that returns a result string type initialized from the response data with
+    /// the specified string encoding.
+    ///
+    /// - parameter encoding: The string encoding. If `nil`, the string encoding will be determined from the server
+    ///                       response, falling back to the default HTTP default character set, ISO-8859-1.
+    ///
+    /// - returns: A string response serializer.
+    public static func stringResponseSerializer(encoding: String.Encoding? = nil) -> DownloadResponseSerializer<String> {
+        return DownloadResponseSerializer { _, response, fileURL, error in
+            guard error == nil else { return .failure(error!) }
+
+            guard let fileURL = fileURL else {
+                return .failure(AFError.responseSerializationFailed(reason: .inputFileNil))
+            }
+
+            do {
+                let data = try Data(contentsOf: fileURL)
+                return Request.serializeResponseString(encoding: encoding, response: response, data: data, error: error)
+            } catch {
+                return .failure(AFError.responseSerializationFailed(reason: .inputFileReadFailed(at: fileURL)))
+            }
+        }
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter encoding:          The string encoding. If `nil`, the string encoding will be determined from the
+    ///                                server response, falling back to the default HTTP default character set,
+    ///                                ISO-8859-1.
+    /// - parameter completionHandler: A closure to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func responseString(
+        queue: DispatchQueue? = nil,
+        encoding: String.Encoding? = nil,
+        completionHandler: @escaping (DownloadResponse<String>) -> Void)
+        -> Self {
+        return response(
+            queue: queue,
+            responseSerializer: DownloadRequest.stringResponseSerializer(encoding: encoding),
+            completionHandler: completionHandler
+        )
+    }
+}
+
+// MARK: - JSON
+
+extension Request {
+    /// Returns a JSON object contained in a result type constructed from the response data using `JSONSerialization`
+    /// with the specified reading options.
+    ///
+    /// - parameter options:  The JSON serialization reading options. Defaults to `.allowFragments`.
+    /// - parameter response: The response from the server.
+    /// - parameter data:     The data returned from the server.
+    /// - parameter error:    The error already encountered if it exists.
+    ///
+    /// - returns: The result data type.
+    public static func serializeResponseJSON(
+        options: JSONSerialization.ReadingOptions,
+        response: HTTPURLResponse?,
+        data: Data?,
+        error: Error?)
+        -> Result<Any> {
+        guard error == nil else { return .failure(error!) }
+
+        if let response = response, emptyDataStatusCodes.contains(response.statusCode) { return .success(NSNull()) }
+
+        guard let validData = data, validData.count > 0 else {
+            return .failure(AFError.responseSerializationFailed(reason: .inputDataNilOrZeroLength))
+        }
+
+        do {
+            let json = try JSONSerialization.jsonObject(with: validData, options: options)
+            return .success(json)
+        } catch {
+            return .failure(AFError.responseSerializationFailed(reason: .jsonSerializationFailed(error: error)))
+        }
+    }
+}
+
+extension DataRequest {
+    /// Creates a response serializer that returns a JSON object result type constructed from the response data using
+    /// `JSONSerialization` with the specified reading options.
+    ///
+    /// - parameter options: The JSON serialization reading options. Defaults to `.allowFragments`.
+    ///
+    /// - returns: A JSON object response serializer.
+    public static func jsonResponseSerializer(
+        options: JSONSerialization.ReadingOptions = .allowFragments)
+        -> DataResponseSerializer<Any> {
+        return DataResponseSerializer { _, response, data, error in
+            return Request.serializeResponseJSON(options: options, response: response, data: data, error: error)
+        }
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter options:           The JSON serialization reading options. Defaults to `.allowFragments`.
+    /// - parameter completionHandler: A closure to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func responseJSON(
+        queue: DispatchQueue? = nil,
+        options: JSONSerialization.ReadingOptions = .allowFragments,
+        completionHandler: @escaping (DataResponse<Any>) -> Void)
+        -> Self {
+        return response(
+            queue: queue,
+            responseSerializer: DataRequest.jsonResponseSerializer(options: options),
+            completionHandler: completionHandler
+        )
+    }
+}
+
+extension DownloadRequest {
+    /// Creates a response serializer that returns a JSON object result type constructed from the response data using
+    /// `JSONSerialization` with the specified reading options.
+    ///
+    /// - parameter options: The JSON serialization reading options. Defaults to `.allowFragments`.
+    ///
+    /// - returns: A JSON object response serializer.
+    public static func jsonResponseSerializer(
+        options: JSONSerialization.ReadingOptions = .allowFragments)
+        -> DownloadResponseSerializer<Any> {
+        return DownloadResponseSerializer { _, response, fileURL, error in
+            guard error == nil else { return .failure(error!) }
+
+            guard let fileURL = fileURL else {
+                return .failure(AFError.responseSerializationFailed(reason: .inputFileNil))
+            }
+
+            do {
+                let data = try Data(contentsOf: fileURL)
+                return Request.serializeResponseJSON(options: options, response: response, data: data, error: error)
+            } catch {
+                return .failure(AFError.responseSerializationFailed(reason: .inputFileReadFailed(at: fileURL)))
+            }
+        }
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter options:           The JSON serialization reading options. Defaults to `.allowFragments`.
+    /// - parameter completionHandler: A closure to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func responseJSON(
+        queue: DispatchQueue? = nil,
+        options: JSONSerialization.ReadingOptions = .allowFragments,
+        completionHandler: @escaping (DownloadResponse<Any>) -> Void)
+        -> Self {
+        return response(
+            queue: queue,
+            responseSerializer: DownloadRequest.jsonResponseSerializer(options: options),
+            completionHandler: completionHandler
+        )
+    }
+}
+
+// MARK: - Property List
+
+extension Request {
+    /// Returns a plist object contained in a result type constructed from the response data using
+    /// `PropertyListSerialization` with the specified reading options.
+    ///
+    /// - parameter options:  The property list reading options. Defaults to `[]`.
+    /// - parameter response: The response from the server.
+    /// - parameter data:     The data returned from the server.
+    /// - parameter error:    The error already encountered if it exists.
+    ///
+    /// - returns: The result data type.
+    public static func serializeResponsePropertyList(
+        options: PropertyListSerialization.ReadOptions,
+        response: HTTPURLResponse?,
+        data: Data?,
+        error: Error?)
+        -> Result<Any> {
+        guard error == nil else { return .failure(error!) }
+
+        if let response = response, emptyDataStatusCodes.contains(response.statusCode) { return .success(NSNull()) }
+
+        guard let validData = data, validData.count > 0 else {
+            return .failure(AFError.responseSerializationFailed(reason: .inputDataNilOrZeroLength))
+        }
+
+        do {
+            let plist = try PropertyListSerialization.propertyList(from: validData, options: options, format: nil)
+            return .success(plist)
+        } catch {
+            return .failure(AFError.responseSerializationFailed(reason: .propertyListSerializationFailed(error: error)))
+        }
+    }
+}
+
+extension DataRequest {
+    /// Creates a response serializer that returns an object constructed from the response data using
+    /// `PropertyListSerialization` with the specified reading options.
+    ///
+    /// - parameter options: The property list reading options. Defaults to `[]`.
+    ///
+    /// - returns: A property list object response serializer.
+    public static func propertyListResponseSerializer(
+        options: PropertyListSerialization.ReadOptions = [])
+        -> DataResponseSerializer<Any> {
+        return DataResponseSerializer { _, response, data, error in
+            return Request.serializeResponsePropertyList(options: options, response: response, data: data, error: error)
+        }
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter options:           The property list reading options. Defaults to `[]`.
+    /// - parameter completionHandler: A closure to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func responsePropertyList(
+        queue: DispatchQueue? = nil,
+        options: PropertyListSerialization.ReadOptions = [],
+        completionHandler: @escaping (DataResponse<Any>) -> Void)
+        -> Self {
+        return response(
+            queue: queue,
+            responseSerializer: DataRequest.propertyListResponseSerializer(options: options),
+            completionHandler: completionHandler
+        )
+    }
+}
+
+extension DownloadRequest {
+    /// Creates a response serializer that returns an object constructed from the response data using
+    /// `PropertyListSerialization` with the specified reading options.
+    ///
+    /// - parameter options: The property list reading options. Defaults to `[]`.
+    ///
+    /// - returns: A property list object response serializer.
+    public static func propertyListResponseSerializer(
+        options: PropertyListSerialization.ReadOptions = [])
+        -> DownloadResponseSerializer<Any> {
+        return DownloadResponseSerializer { _, response, fileURL, error in
+            guard error == nil else { return .failure(error!) }
+
+            guard let fileURL = fileURL else {
+                return .failure(AFError.responseSerializationFailed(reason: .inputFileNil))
+            }
+
+            do {
+                let data = try Data(contentsOf: fileURL)
+                return Request.serializeResponsePropertyList(options: options, response: response, data: data, error: error)
+            } catch {
+                return .failure(AFError.responseSerializationFailed(reason: .inputFileReadFailed(at: fileURL)))
+            }
+        }
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - parameter options:           The property list reading options. Defaults to `[]`.
+    /// - parameter completionHandler: A closure to be executed once the request has finished.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func responsePropertyList(
+        queue: DispatchQueue? = nil,
+        options: PropertyListSerialization.ReadOptions = [],
+        completionHandler: @escaping (DownloadResponse<Any>) -> Void)
+        -> Self {
+        return response(
+            queue: queue,
+            responseSerializer: DownloadRequest.propertyListResponseSerializer(options: options),
+            completionHandler: completionHandler
+        )
+    }
+}
+
+/// A set of HTTP response status code that do not contain response data.
+private let emptyDataStatusCodes: Set<Int> = [204, 205]

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/ServerTrustPolicy.swift

@@ -0,0 +1,306 @@
+//
+//  ServerTrustPolicy.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Responsible for managing the mapping of `ServerTrustPolicy` objects to a given host.
+open class ServerTrustPolicyManager {
+    /// The dictionary of policies mapped to a particular host.
+    public let policies: [String: ServerTrustPolicy]
+
+    /// Initializes the `ServerTrustPolicyManager` instance with the given policies.
+    ///
+    /// Since different servers and web services can have different leaf certificates, intermediate and even root
+    /// certficates, it is important to have the flexibility to specify evaluation policies on a per host basis. This
+    /// allows for scenarios such as using default evaluation for host1, certificate pinning for host2, public key
+    /// pinning for host3 and disabling evaluation for host4.
+    ///
+    /// - parameter policies: A dictionary of all policies mapped to a particular host.
+    ///
+    /// - returns: The new `ServerTrustPolicyManager` instance.
+    public init(policies: [String: ServerTrustPolicy]) {
+        self.policies = policies
+    }
+
+    /// Returns the `ServerTrustPolicy` for the given host if applicable.
+    ///
+    /// By default, this method will return the policy that perfectly matches the given host. Subclasses could override
+    /// this method and implement more complex mapping implementations such as wildcards.
+    ///
+    /// - parameter host: The host to use when searching for a matching policy.
+    ///
+    /// - returns: The server trust policy for the given host if found.
+    open func serverTrustPolicy(forHost host: String) -> ServerTrustPolicy? {
+        return policies[host]
+    }
+}
+
+// MARK: -
+
+extension URLSession {
+    private struct AssociatedKeys {
+        static var managerKey = "URLSession.ServerTrustPolicyManager"
+    }
+
+    var serverTrustPolicyManager: ServerTrustPolicyManager? {
+        get {
+            return objc_getAssociatedObject(self, &AssociatedKeys.managerKey) as? ServerTrustPolicyManager
+        }
+        set (manager) {
+            objc_setAssociatedObject(self, &AssociatedKeys.managerKey, manager, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+}
+
+// MARK: - ServerTrustPolicy
+
+/// The `ServerTrustPolicy` evaluates the server trust generally provided by an `NSURLAuthenticationChallenge` when
+/// connecting to a server over a secure HTTPS connection. The policy configuration then evaluates the server trust
+/// with a given set of criteria to determine whether the server trust is valid and the connection should be made.
+///
+/// Using pinned certificates or public keys for evaluation helps prevent man-in-the-middle (MITM) attacks and other
+/// vulnerabilities. Applications dealing with sensitive customer data or financial information are strongly encouraged
+/// to route all communication over an HTTPS connection with pinning enabled.
+///
+/// - performDefaultEvaluation: Uses the default server trust evaluation while allowing you to control whether to
+///                             validate the host provided by the challenge. Applications are encouraged to always
+///                             validate the host in production environments to guarantee the validity of the server's
+///                             certificate chain.
+///
+/// - performRevokedEvaluation: Uses the default and revoked server trust evaluations allowing you to control whether to
+///                             validate the host provided by the challenge as well as specify the revocation flags for
+///                             testing for revoked certificates. Apple platforms did not start testing for revoked
+///                             certificates automatically until iOS 10.1, macOS 10.12 and tvOS 10.1 which is
+///                             demonstrated in our TLS tests. Applications are encouraged to always validate the host
+///                             in production environments to guarantee the validity of the server's certificate chain.
+///
+/// - pinCertificates:          Uses the pinned certificates to validate the server trust. The server trust is
+///                             considered valid if one of the pinned certificates match one of the server certificates.
+///                             By validating both the certificate chain and host, certificate pinning provides a very
+///                             secure form of server trust validation mitigating most, if not all, MITM attacks.
+///                             Applications are encouraged to always validate the host and require a valid certificate
+///                             chain in production environments.
+///
+/// - pinPublicKeys:            Uses the pinned public keys to validate the server trust. The server trust is considered
+///                             valid if one of the pinned public keys match one of the server certificate public keys.
+///                             By validating both the certificate chain and host, public key pinning provides a very
+///                             secure form of server trust validation mitigating most, if not all, MITM attacks.
+///                             Applications are encouraged to always validate the host and require a valid certificate
+///                             chain in production environments.
+///
+/// - disableEvaluation:        Disables all evaluation which in turn will always consider any server trust as valid.
+///
+/// - customEvaluation:         Uses the associated closure to evaluate the validity of the server trust.
+public enum ServerTrustPolicy {
+    case performDefaultEvaluation(validateHost: Bool)
+    case performRevokedEvaluation(validateHost: Bool, revocationFlags: CFOptionFlags)
+    case pinCertificates(certificates: [SecCertificate], validateCertificateChain: Bool, validateHost: Bool)
+    case pinPublicKeys(publicKeys: [SecKey], validateCertificateChain: Bool, validateHost: Bool)
+    case disableEvaluation
+    case customEvaluation((_ serverTrust: SecTrust, _ host: String) -> Bool)
+
+    // MARK: - Bundle Location
+
+    /// Returns all certificates within the given bundle with a `.cer` file extension.
+    ///
+    /// - parameter bundle: The bundle to search for all `.cer` files.
+    ///
+    /// - returns: All certificates within the given bundle.
+    public static func certificates(in bundle: Bundle = Bundle.main) -> [SecCertificate] {
+        var certificates: [SecCertificate] = []
+
+        let paths = Set([".cer", ".CER", ".crt", ".CRT", ".der", ".DER"].map { fileExtension in
+            bundle.paths(forResourcesOfType: fileExtension, inDirectory: nil)
+        }.joined())
+
+        for path in paths {
+            if
+                let certificateData = try? Data(contentsOf: URL(fileURLWithPath: path)) as CFData,
+                let certificate = SecCertificateCreateWithData(nil, certificateData)
+            {
+                certificates.append(certificate)
+            }
+        }
+
+        return certificates
+    }
+
+    /// Returns all public keys within the given bundle with a `.cer` file extension.
+    ///
+    /// - parameter bundle: The bundle to search for all `*.cer` files.
+    ///
+    /// - returns: All public keys within the given bundle.
+    public static func publicKeys(in bundle: Bundle = Bundle.main) -> [SecKey] {
+        var publicKeys: [SecKey] = []
+
+        for certificate in certificates(in: bundle) {
+            if let publicKey = publicKey(for: certificate) {
+                publicKeys.append(publicKey)
+            }
+        }
+
+        return publicKeys
+    }
+
+    // MARK: - Evaluation
+
+    /// Evaluates whether the server trust is valid for the given host.
+    ///
+    /// - parameter serverTrust: The server trust to evaluate.
+    /// - parameter host:        The host of the challenge protection space.
+    ///
+    /// - returns: Whether the server trust is valid.
+    public func evaluate(_ serverTrust: SecTrust, forHost host: String) -> Bool {
+        var serverTrustIsValid = false
+
+        switch self {
+        case let .performDefaultEvaluation(validateHost):
+            let policy = SecPolicyCreateSSL(true, validateHost ? host as CFString : nil)
+            SecTrustSetPolicies(serverTrust, policy)
+
+            serverTrustIsValid = trustIsValid(serverTrust)
+        case let .performRevokedEvaluation(validateHost, revocationFlags):
+            let defaultPolicy = SecPolicyCreateSSL(true, validateHost ? host as CFString : nil)
+            let revokedPolicy = SecPolicyCreateRevocation(revocationFlags)
+            SecTrustSetPolicies(serverTrust, [defaultPolicy, revokedPolicy] as CFTypeRef)
+
+            serverTrustIsValid = trustIsValid(serverTrust)
+        case let .pinCertificates(pinnedCertificates, validateCertificateChain, validateHost):
+            if validateCertificateChain {
+                let policy = SecPolicyCreateSSL(true, validateHost ? host as CFString : nil)
+                SecTrustSetPolicies(serverTrust, policy)
+
+                SecTrustSetAnchorCertificates(serverTrust, pinnedCertificates as CFArray)
+                SecTrustSetAnchorCertificatesOnly(serverTrust, true)
+
+                serverTrustIsValid = trustIsValid(serverTrust)
+            } else {
+                let serverCertificatesDataArray = certificateData(for: serverTrust)
+                let pinnedCertificatesDataArray = certificateData(for: pinnedCertificates)
+
+                outerLoop: for serverCertificateData in serverCertificatesDataArray {
+                    for pinnedCertificateData in pinnedCertificatesDataArray {
+                        if serverCertificateData == pinnedCertificateData {
+                            serverTrustIsValid = true
+                            break outerLoop
+                        }
+                    }
+                }
+            }
+        case let .pinPublicKeys(pinnedPublicKeys, validateCertificateChain, validateHost):
+            var certificateChainEvaluationPassed = true
+
+            if validateCertificateChain {
+                let policy = SecPolicyCreateSSL(true, validateHost ? host as CFString : nil)
+                SecTrustSetPolicies(serverTrust, policy)
+
+                certificateChainEvaluationPassed = trustIsValid(serverTrust)
+            }
+
+            if certificateChainEvaluationPassed {
+                outerLoop: for serverPublicKey in ServerTrustPolicy.publicKeys(for: serverTrust) as [AnyObject] {
+                    for pinnedPublicKey in pinnedPublicKeys as [AnyObject] {
+                        if serverPublicKey.isEqual(pinnedPublicKey) {
+                            serverTrustIsValid = true
+                            break outerLoop
+                        }
+                    }
+                }
+            }
+        case .disableEvaluation:
+            serverTrustIsValid = true
+        case let .customEvaluation(closure):
+            serverTrustIsValid = closure(serverTrust, host)
+        }
+
+        return serverTrustIsValid
+    }
+
+    // MARK: - Private - Trust Validation
+
+    private func trustIsValid(_ trust: SecTrust) -> Bool {
+        var isValid = false
+
+        var result = SecTrustResultType.invalid
+        let status = SecTrustEvaluate(trust, &result)
+
+        if status == errSecSuccess {
+            let unspecified = SecTrustResultType.unspecified
+            let proceed = SecTrustResultType.proceed
+
+            isValid = result == unspecified || result == proceed
+        }
+
+        return isValid
+    }
+
+    // MARK: - Private - Certificate Data
+
+    private func certificateData(for trust: SecTrust) -> [Data] {
+        var certificates: [SecCertificate] = []
+
+        for index in 0..<SecTrustGetCertificateCount(trust) {
+            if let certificate = SecTrustGetCertificateAtIndex(trust, index) {
+                certificates.append(certificate)
+            }
+        }
+
+        return certificateData(for: certificates)
+    }
+
+    private func certificateData(for certificates: [SecCertificate]) -> [Data] {
+        return certificates.map { SecCertificateCopyData($0) as Data }
+    }
+
+    // MARK: - Private - Public Key Extraction
+
+    private static func publicKeys(for trust: SecTrust) -> [SecKey] {
+        var publicKeys: [SecKey] = []
+
+        for index in 0..<SecTrustGetCertificateCount(trust) {
+            if
+                let certificate = SecTrustGetCertificateAtIndex(trust, index),
+                let publicKey = publicKey(for: certificate)
+            {
+                publicKeys.append(publicKey)
+            }
+        }
+
+        return publicKeys
+    }
+
+    private static func publicKey(for certificate: SecCertificate) -> SecKey? {
+        var publicKey: SecKey?
+
+        let policy = SecPolicyCreateBasicX509()
+        var trust: SecTrust?
+        let trustCreationStatus = SecTrustCreateWithCertificates(certificate, policy, &trust)
+
+        if let trust = trust, trustCreationStatus == errSecSuccess {
+            publicKey = SecTrustCopyPublicKey(trust)
+        }
+
+        return publicKey
+    }
+}

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/SessionDelegate.swift

@@ -0,0 +1,713 @@
+//
+//  SessionDelegate.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Responsible for handling all delegate callbacks for the underlying session.
+open class SessionDelegate: NSObject {
+
+    // MARK: URLSessionDelegate Overrides
+
+    /// Overrides default behavior for URLSessionDelegate method `urlSession(_:didBecomeInvalidWithError:)`.
+    open var sessionDidBecomeInvalidWithError: ((URLSession, Error?) -> Void)?
+
+    /// Overrides default behavior for URLSessionDelegate method `urlSession(_:didReceive:completionHandler:)`.
+    open var sessionDidReceiveChallenge: ((URLSession, URLAuthenticationChallenge) -> (URLSession.AuthChallengeDisposition, URLCredential?))?
+
+    /// Overrides all behavior for URLSessionDelegate method `urlSession(_:didReceive:completionHandler:)` and requires the caller to call the `completionHandler`.
+    open var sessionDidReceiveChallengeWithCompletion: ((URLSession, URLAuthenticationChallenge, @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) -> Void)?
+
+    /// Overrides default behavior for URLSessionDelegate method `urlSessionDidFinishEvents(forBackgroundURLSession:)`.
+    open var sessionDidFinishEventsForBackgroundURLSession: ((URLSession) -> Void)?
+
+    // MARK: URLSessionTaskDelegate Overrides
+
+    /// Overrides default behavior for URLSessionTaskDelegate method `urlSession(_:task:willPerformHTTPRedirection:newRequest:completionHandler:)`.
+    open var taskWillPerformHTTPRedirection: ((URLSession, URLSessionTask, HTTPURLResponse, URLRequest) -> URLRequest?)?
+
+    /// Overrides all behavior for URLSessionTaskDelegate method `urlSession(_:task:willPerformHTTPRedirection:newRequest:completionHandler:)` and
+    /// requires the caller to call the `completionHandler`.
+    open var taskWillPerformHTTPRedirectionWithCompletion: ((URLSession, URLSessionTask, HTTPURLResponse, URLRequest, @escaping (URLRequest?) -> Void) -> Void)?
+
+    /// Overrides default behavior for URLSessionTaskDelegate method `urlSession(_:task:didReceive:completionHandler:)`.
+    open var taskDidReceiveChallenge: ((URLSession, URLSessionTask, URLAuthenticationChallenge) -> (URLSession.AuthChallengeDisposition, URLCredential?))?
+
+    /// Overrides all behavior for URLSessionTaskDelegate method `urlSession(_:task:didReceive:completionHandler:)` and
+    /// requires the caller to call the `completionHandler`.
+    open var taskDidReceiveChallengeWithCompletion: ((URLSession, URLSessionTask, URLAuthenticationChallenge, @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) -> Void)?
+
+    /// Overrides default behavior for URLSessionTaskDelegate method `urlSession(_:task:needNewBodyStream:)`.
+    open var taskNeedNewBodyStream: ((URLSession, URLSessionTask) -> InputStream?)?
+
+    /// Overrides all behavior for URLSessionTaskDelegate method `urlSession(_:task:needNewBodyStream:)` and
+    /// requires the caller to call the `completionHandler`.
+    open var taskNeedNewBodyStreamWithCompletion: ((URLSession, URLSessionTask, @escaping (InputStream?) -> Void) -> Void)?
+
+    /// Overrides default behavior for URLSessionTaskDelegate method `urlSession(_:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:)`.
+    open var taskDidSendBodyData: ((URLSession, URLSessionTask, Int64, Int64, Int64) -> Void)?
+
+    /// Overrides default behavior for URLSessionTaskDelegate method `urlSession(_:task:didCompleteWithError:)`.
+    open var taskDidComplete: ((URLSession, URLSessionTask, Error?) -> Void)?
+
+    // MARK: URLSessionDataDelegate Overrides
+
+    /// Overrides default behavior for URLSessionDataDelegate method `urlSession(_:dataTask:didReceive:completionHandler:)`.
+    open var dataTaskDidReceiveResponse: ((URLSession, URLSessionDataTask, URLResponse) -> URLSession.ResponseDisposition)?
+
+    /// Overrides all behavior for URLSessionDataDelegate method `urlSession(_:dataTask:didReceive:completionHandler:)` and
+    /// requires caller to call the `completionHandler`.
+    open var dataTaskDidReceiveResponseWithCompletion: ((URLSession, URLSessionDataTask, URLResponse, @escaping (URLSession.ResponseDisposition) -> Void) -> Void)?
+
+    /// Overrides default behavior for URLSessionDataDelegate method `urlSession(_:dataTask:didBecome:)`.
+    open var dataTaskDidBecomeDownloadTask: ((URLSession, URLSessionDataTask, URLSessionDownloadTask) -> Void)?
+
+    /// Overrides default behavior for URLSessionDataDelegate method `urlSession(_:dataTask:didReceive:)`.
+    open var dataTaskDidReceiveData: ((URLSession, URLSessionDataTask, Data) -> Void)?
+
+    /// Overrides default behavior for URLSessionDataDelegate method `urlSession(_:dataTask:willCacheResponse:completionHandler:)`.
+    open var dataTaskWillCacheResponse: ((URLSession, URLSessionDataTask, CachedURLResponse) -> CachedURLResponse?)?
+
+    /// Overrides all behavior for URLSessionDataDelegate method `urlSession(_:dataTask:willCacheResponse:completionHandler:)` and
+    /// requires caller to call the `completionHandler`.
+    open var dataTaskWillCacheResponseWithCompletion: ((URLSession, URLSessionDataTask, CachedURLResponse, @escaping (CachedURLResponse?) -> Void) -> Void)?
+
+    // MARK: URLSessionDownloadDelegate Overrides
+
+    /// Overrides default behavior for URLSessionDownloadDelegate method `urlSession(_:downloadTask:didFinishDownloadingTo:)`.
+    open var downloadTaskDidFinishDownloadingToURL: ((URLSession, URLSessionDownloadTask, URL) -> Void)?
+
+    /// Overrides default behavior for URLSessionDownloadDelegate method `urlSession(_:downloadTask:didWriteData:totalBytesWritten:totalBytesExpectedToWrite:)`.
+    open var downloadTaskDidWriteData: ((URLSession, URLSessionDownloadTask, Int64, Int64, Int64) -> Void)?
+
+    /// Overrides default behavior for URLSessionDownloadDelegate method `urlSession(_:downloadTask:didResumeAtOffset:expectedTotalBytes:)`.
+    open var downloadTaskDidResumeAtOffset: ((URLSession, URLSessionDownloadTask, Int64, Int64) -> Void)?
+
+    // MARK: URLSessionStreamDelegate Overrides
+
+#if !os(watchOS)
+
+    /// Overrides default behavior for URLSessionStreamDelegate method `urlSession(_:readClosedFor:)`.
+    @available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+    open var streamTaskReadClosed: ((URLSession, URLSessionStreamTask) -> Void)? {
+        get {
+            return _streamTaskReadClosed as? (URLSession, URLSessionStreamTask) -> Void
+        }
+        set {
+            _streamTaskReadClosed = newValue
+        }
+    }
+
+    /// Overrides default behavior for URLSessionStreamDelegate method `urlSession(_:writeClosedFor:)`.
+    @available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+    open var streamTaskWriteClosed: ((URLSession, URLSessionStreamTask) -> Void)? {
+        get {
+            return _streamTaskWriteClosed as? (URLSession, URLSessionStreamTask) -> Void
+        }
+        set {
+            _streamTaskWriteClosed = newValue
+        }
+    }
+
+    /// Overrides default behavior for URLSessionStreamDelegate method `urlSession(_:betterRouteDiscoveredFor:)`.
+    @available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+    open var streamTaskBetterRouteDiscovered: ((URLSession, URLSessionStreamTask) -> Void)? {
+        get {
+            return _streamTaskBetterRouteDiscovered as? (URLSession, URLSessionStreamTask) -> Void
+        }
+        set {
+            _streamTaskBetterRouteDiscovered = newValue
+        }
+    }
+
+    /// Overrides default behavior for URLSessionStreamDelegate method `urlSession(_:streamTask:didBecome:outputStream:)`.
+    @available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+    open var streamTaskDidBecomeInputAndOutputStreams: ((URLSession, URLSessionStreamTask, InputStream, OutputStream) -> Void)? {
+        get {
+            return _streamTaskDidBecomeInputStream as? (URLSession, URLSessionStreamTask, InputStream, OutputStream) -> Void
+        }
+        set {
+            _streamTaskDidBecomeInputStream = newValue
+        }
+    }
+
+    var _streamTaskReadClosed: Any?
+    var _streamTaskWriteClosed: Any?
+    var _streamTaskBetterRouteDiscovered: Any?
+    var _streamTaskDidBecomeInputStream: Any?
+
+#endif
+
+    // MARK: Properties
+
+    var retrier: RequestRetrier?
+    weak var sessionManager: SessionManager?
+
+    var requests: [Int: Request] = [:]
+    private let lock = NSLock()
+
+    /// Access the task delegate for the specified task in a thread-safe manner.
+    open subscript(task: URLSessionTask) -> Request? {
+        get {
+            lock.lock() ; defer { lock.unlock() }
+            return requests[task.taskIdentifier]
+        }
+        set {
+            lock.lock() ; defer { lock.unlock() }
+            requests[task.taskIdentifier] = newValue
+        }
+    }
+
+    // MARK: Lifecycle
+
+    /// Initializes the `SessionDelegate` instance.
+    ///
+    /// - returns: The new `SessionDelegate` instance.
+    public override init() {
+        super.init()
+    }
+
+    // MARK: NSObject Overrides
+
+    /// Returns a `Bool` indicating whether the `SessionDelegate` implements or inherits a method that can respond
+    /// to a specified message.
+    ///
+    /// - parameter selector: A selector that identifies a message.
+    ///
+    /// - returns: `true` if the receiver implements or inherits a method that can respond to selector, otherwise `false`.
+    open override func responds(to selector: Selector) -> Bool {
+        #if !os(macOS)
+            if selector == #selector(URLSessionDelegate.urlSessionDidFinishEvents(forBackgroundURLSession:)) {
+                return sessionDidFinishEventsForBackgroundURLSession != nil
+            }
+        #endif
+
+        #if !os(watchOS)
+            if #available(iOS 9.0, macOS 10.11, tvOS 9.0, *) {
+                switch selector {
+                case #selector(URLSessionStreamDelegate.urlSession(_:readClosedFor:)):
+                    return streamTaskReadClosed != nil
+                case #selector(URLSessionStreamDelegate.urlSession(_:writeClosedFor:)):
+                    return streamTaskWriteClosed != nil
+                case #selector(URLSessionStreamDelegate.urlSession(_:betterRouteDiscoveredFor:)):
+                    return streamTaskBetterRouteDiscovered != nil
+                case #selector(URLSessionStreamDelegate.urlSession(_:streamTask:didBecome:outputStream:)):
+                    return streamTaskDidBecomeInputAndOutputStreams != nil
+                default:
+                    break
+                }
+            }
+        #endif
+
+        switch selector {
+        case #selector(URLSessionDelegate.urlSession(_:didBecomeInvalidWithError:)):
+            return sessionDidBecomeInvalidWithError != nil
+        case #selector(URLSessionDelegate.urlSession(_:didReceive:completionHandler:)):
+            return (sessionDidReceiveChallenge != nil  || sessionDidReceiveChallengeWithCompletion != nil)
+        case #selector(URLSessionTaskDelegate.urlSession(_:task:willPerformHTTPRedirection:newRequest:completionHandler:)):
+            return (taskWillPerformHTTPRedirection != nil || taskWillPerformHTTPRedirectionWithCompletion != nil)
+        case #selector(URLSessionDataDelegate.urlSession(_:dataTask:didReceive:completionHandler:)):
+            return (dataTaskDidReceiveResponse != nil || dataTaskDidReceiveResponseWithCompletion != nil)
+        default:
+            return type(of: self).instancesRespond(to: selector)
+        }
+    }
+}
+
+// MARK: - URLSessionDelegate
+
+extension SessionDelegate: URLSessionDelegate {
+    /// Tells the delegate that the session has been invalidated.
+    ///
+    /// - parameter session: The session object that was invalidated.
+    /// - parameter error:   The error that caused invalidation, or nil if the invalidation was explicit.
+    open func urlSession(_ session: URLSession, didBecomeInvalidWithError error: Error?) {
+        sessionDidBecomeInvalidWithError?(session, error)
+    }
+
+    /// Requests credentials from the delegate in response to a session-level authentication request from the
+    /// remote server.
+    ///
+    /// - parameter session:           The session containing the task that requested authentication.
+    /// - parameter challenge:         An object that contains the request for authentication.
+    /// - parameter completionHandler: A handler that your delegate method must call providing the disposition
+    ///                                and credential.
+    open func urlSession(
+        _ session: URLSession,
+        didReceive challenge: URLAuthenticationChallenge,
+        completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
+        guard sessionDidReceiveChallengeWithCompletion == nil else {
+            sessionDidReceiveChallengeWithCompletion?(session, challenge, completionHandler)
+            return
+        }
+
+        var disposition: URLSession.AuthChallengeDisposition = .performDefaultHandling
+        var credential: URLCredential?
+
+        if let sessionDidReceiveChallenge = sessionDidReceiveChallenge {
+            (disposition, credential) = sessionDidReceiveChallenge(session, challenge)
+        } else if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
+            let host = challenge.protectionSpace.host
+
+            if
+                let serverTrustPolicy = session.serverTrustPolicyManager?.serverTrustPolicy(forHost: host),
+                let serverTrust = challenge.protectionSpace.serverTrust
+            {
+                if serverTrustPolicy.evaluate(serverTrust, forHost: host) {
+                    disposition = .useCredential
+                    credential = URLCredential(trust: serverTrust)
+                } else {
+                    disposition = .cancelAuthenticationChallenge
+                }
+            }
+        }
+
+        completionHandler(disposition, credential)
+    }
+
+#if !os(macOS)
+
+    /// Tells the delegate that all messages enqueued for a session have been delivered.
+    ///
+    /// - parameter session: The session that no longer has any outstanding requests.
+    open func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) {
+        sessionDidFinishEventsForBackgroundURLSession?(session)
+    }
+
+#endif
+}
+
+// MARK: - URLSessionTaskDelegate
+
+extension SessionDelegate: URLSessionTaskDelegate {
+    /// Tells the delegate that the remote server requested an HTTP redirect.
+    ///
+    /// - parameter session:           The session containing the task whose request resulted in a redirect.
+    /// - parameter task:              The task whose request resulted in a redirect.
+    /// - parameter response:          An object containing the server’s response to the original request.
+    /// - parameter request:           A URL request object filled out with the new location.
+    /// - parameter completionHandler: A closure that your handler should call with either the value of the request
+    ///                                parameter, a modified URL request object, or NULL to refuse the redirect and
+    ///                                return the body of the redirect response.
+    open func urlSession(
+        _ session: URLSession,
+        task: URLSessionTask,
+        willPerformHTTPRedirection response: HTTPURLResponse,
+        newRequest request: URLRequest,
+        completionHandler: @escaping (URLRequest?) -> Void) {
+        guard taskWillPerformHTTPRedirectionWithCompletion == nil else {
+            taskWillPerformHTTPRedirectionWithCompletion?(session, task, response, request, completionHandler)
+            return
+        }
+
+        var redirectRequest: URLRequest? = request
+
+        if let taskWillPerformHTTPRedirection = taskWillPerformHTTPRedirection {
+            redirectRequest = taskWillPerformHTTPRedirection(session, task, response, request)
+        }
+
+        completionHandler(redirectRequest)
+    }
+
+    /// Requests credentials from the delegate in response to an authentication request from the remote server.
+    ///
+    /// - parameter session:           The session containing the task whose request requires authentication.
+    /// - parameter task:              The task whose request requires authentication.
+    /// - parameter challenge:         An object that contains the request for authentication.
+    /// - parameter completionHandler: A handler that your delegate method must call providing the disposition
+    ///                                and credential.
+    open func urlSession(
+        _ session: URLSession,
+        task: URLSessionTask,
+        didReceive challenge: URLAuthenticationChallenge,
+        completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
+        guard taskDidReceiveChallengeWithCompletion == nil else {
+            taskDidReceiveChallengeWithCompletion?(session, task, challenge, completionHandler)
+            return
+        }
+
+        if let taskDidReceiveChallenge = taskDidReceiveChallenge {
+            let result = taskDidReceiveChallenge(session, task, challenge)
+            completionHandler(result.0, result.1)
+        } else if let delegate = self[task]?.delegate {
+            delegate.urlSession(
+                session,
+                task: task,
+                didReceive: challenge,
+                completionHandler: completionHandler
+            )
+        } else {
+            urlSession(session, didReceive: challenge, completionHandler: completionHandler)
+        }
+    }
+
+    /// Tells the delegate when a task requires a new request body stream to send to the remote server.
+    ///
+    /// - parameter session:           The session containing the task that needs a new body stream.
+    /// - parameter task:              The task that needs a new body stream.
+    /// - parameter completionHandler: A completion handler that your delegate method should call with the new body stream.
+    open func urlSession(
+        _ session: URLSession,
+        task: URLSessionTask,
+        needNewBodyStream completionHandler: @escaping (InputStream?) -> Void) {
+        guard taskNeedNewBodyStreamWithCompletion == nil else {
+            taskNeedNewBodyStreamWithCompletion?(session, task, completionHandler)
+            return
+        }
+
+        if let taskNeedNewBodyStream = taskNeedNewBodyStream {
+            completionHandler(taskNeedNewBodyStream(session, task))
+        } else if let delegate = self[task]?.delegate {
+            delegate.urlSession(session, task: task, needNewBodyStream: completionHandler)
+        }
+    }
+
+    /// Periodically informs the delegate of the progress of sending body content to the server.
+    ///
+    /// - parameter session:                  The session containing the data task.
+    /// - parameter task:                     The data task.
+    /// - parameter bytesSent:                The number of bytes sent since the last time this delegate method was called.
+    /// - parameter totalBytesSent:           The total number of bytes sent so far.
+    /// - parameter totalBytesExpectedToSend: The expected length of the body data.
+    open func urlSession(
+        _ session: URLSession,
+        task: URLSessionTask,
+        didSendBodyData bytesSent: Int64,
+        totalBytesSent: Int64,
+        totalBytesExpectedToSend: Int64) {
+        if let taskDidSendBodyData = taskDidSendBodyData {
+            taskDidSendBodyData(session, task, bytesSent, totalBytesSent, totalBytesExpectedToSend)
+        } else if let delegate = self[task]?.delegate as? UploadTaskDelegate {
+            delegate.URLSession(
+                session,
+                task: task,
+                didSendBodyData: bytesSent,
+                totalBytesSent: totalBytesSent,
+                totalBytesExpectedToSend: totalBytesExpectedToSend
+            )
+        }
+    }
+
+#if !os(watchOS)
+
+    /// Tells the delegate that the session finished collecting metrics for the task.
+    ///
+    /// - parameter session: The session collecting the metrics.
+    /// - parameter task:    The task whose metrics have been collected.
+    /// - parameter metrics: The collected metrics.
+    @available(iOS 10.0, macOS 10.12, tvOS 10.0, *)
+    @objc(URLSession:task:didFinishCollectingMetrics:)
+    open func urlSession(_ session: URLSession, task: URLSessionTask, didFinishCollecting metrics: URLSessionTaskMetrics) {
+        self[task]?.delegate.metrics = metrics
+    }
+
+#endif
+
+    /// Tells the delegate that the task finished transferring data.
+    ///
+    /// - parameter session: The session containing the task whose request finished transferring data.
+    /// - parameter task:    The task whose request finished transferring data.
+    /// - parameter error:   If an error occurred, an error object indicating how the transfer failed, otherwise nil.
+    open func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
+        /// Executed after it is determined that the request is not going to be retried
+        let completeTask: (URLSession, URLSessionTask, Error?) -> Void = { [weak self] session, task, error in
+            guard let strongSelf = self else { return }
+
+            strongSelf.taskDidComplete?(session, task, error)
+
+            strongSelf[task]?.delegate.urlSession(session, task: task, didCompleteWithError: error)
+
+            var userInfo: [String: Any] = [Notification.Key.Task: task]
+
+            if let data = (strongSelf[task]?.delegate as? DataTaskDelegate)?.data {
+                userInfo[Notification.Key.ResponseData] = data
+            }
+
+            NotificationCenter.default.post(
+                name: Notification.Name.Task.DidComplete,
+                object: strongSelf,
+                userInfo: userInfo
+            )
+
+            strongSelf[task] = nil
+        }
+
+        guard let request = self[task], let sessionManager = sessionManager else {
+            completeTask(session, task, error)
+            return
+        }
+
+        // Run all validations on the request before checking if an error occurred
+        request.validations.forEach { $0() }
+
+        // Determine whether an error has occurred
+        var error: Error? = error
+
+        if request.delegate.error != nil {
+            error = request.delegate.error
+        }
+
+        /// If an error occurred and the retrier is set, asynchronously ask the retrier if the request
+        /// should be retried. Otherwise, complete the task by notifying the task delegate.
+        if let retrier = retrier, let error = error {
+            retrier.should(sessionManager, retry: request, with: error) { [weak self] shouldRetry, timeDelay in
+                guard shouldRetry else { completeTask(session, task, error) ; return }
+
+                DispatchQueue.utility.after(timeDelay) { [weak self] in
+                    guard let strongSelf = self else { return }
+
+                    let retrySucceeded = strongSelf.sessionManager?.retry(request) ?? false
+
+                    if retrySucceeded, let task = request.task {
+                        strongSelf[task] = request
+                        return
+                    } else {
+                        completeTask(session, task, error)
+                    }
+                }
+            }
+        } else {
+            completeTask(session, task, error)
+        }
+    }
+}
+
+// MARK: - URLSessionDataDelegate
+
+extension SessionDelegate: URLSessionDataDelegate {
+    /// Tells the delegate that the data task received the initial reply (headers) from the server.
+    ///
+    /// - parameter session:           The session containing the data task that received an initial reply.
+    /// - parameter dataTask:          The data task that received an initial reply.
+    /// - parameter response:          A URL response object populated with headers.
+    /// - parameter completionHandler: A completion handler that your code calls to continue the transfer, passing a
+    ///                                constant to indicate whether the transfer should continue as a data task or
+    ///                                should become a download task.
+    open func urlSession(
+        _ session: URLSession,
+        dataTask: URLSessionDataTask,
+        didReceive response: URLResponse,
+        completionHandler: @escaping (URLSession.ResponseDisposition) -> Void) {
+        guard dataTaskDidReceiveResponseWithCompletion == nil else {
+            dataTaskDidReceiveResponseWithCompletion?(session, dataTask, response, completionHandler)
+            return
+        }
+
+        var disposition: URLSession.ResponseDisposition = .allow
+
+        if let dataTaskDidReceiveResponse = dataTaskDidReceiveResponse {
+            disposition = dataTaskDidReceiveResponse(session, dataTask, response)
+        }
+
+        completionHandler(disposition)
+    }
+
+    /// Tells the delegate that the data task was changed to a download task.
+    ///
+    /// - parameter session:      The session containing the task that was replaced by a download task.
+    /// - parameter dataTask:     The data task that was replaced by a download task.
+    /// - parameter downloadTask: The new download task that replaced the data task.
+    open func urlSession(
+        _ session: URLSession,
+        dataTask: URLSessionDataTask,
+        didBecome downloadTask: URLSessionDownloadTask) {
+        if let dataTaskDidBecomeDownloadTask = dataTaskDidBecomeDownloadTask {
+            dataTaskDidBecomeDownloadTask(session, dataTask, downloadTask)
+        } else {
+            self[downloadTask]?.delegate = DownloadTaskDelegate(task: downloadTask)
+        }
+    }
+
+    /// Tells the delegate that the data task has received some of the expected data.
+    ///
+    /// - parameter session:  The session containing the data task that provided data.
+    /// - parameter dataTask: The data task that provided data.
+    /// - parameter data:     A data object containing the transferred data.
+    open func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
+        if let dataTaskDidReceiveData = dataTaskDidReceiveData {
+            dataTaskDidReceiveData(session, dataTask, data)
+        } else if let delegate = self[dataTask]?.delegate as? DataTaskDelegate {
+            delegate.urlSession(session, dataTask: dataTask, didReceive: data)
+        }
+    }
+
+    /// Asks the delegate whether the data (or upload) task should store the response in the cache.
+    ///
+    /// - parameter session:           The session containing the data (or upload) task.
+    /// - parameter dataTask:          The data (or upload) task.
+    /// - parameter proposedResponse:  The default caching behavior. This behavior is determined based on the current
+    ///                                caching policy and the values of certain received headers, such as the Pragma
+    ///                                and Cache-Control headers.
+    /// - parameter completionHandler: A block that your handler must call, providing either the original proposed
+    ///                                response, a modified version of that response, or NULL to prevent caching the
+    ///                                response. If your delegate implements this method, it must call this completion
+    ///                                handler; otherwise, your app leaks memory.
+    open func urlSession(
+        _ session: URLSession,
+        dataTask: URLSessionDataTask,
+        willCacheResponse proposedResponse: CachedURLResponse,
+        completionHandler: @escaping (CachedURLResponse?) -> Void) {
+        guard dataTaskWillCacheResponseWithCompletion == nil else {
+            dataTaskWillCacheResponseWithCompletion?(session, dataTask, proposedResponse, completionHandler)
+            return
+        }
+
+        if let dataTaskWillCacheResponse = dataTaskWillCacheResponse {
+            completionHandler(dataTaskWillCacheResponse(session, dataTask, proposedResponse))
+        } else if let delegate = self[dataTask]?.delegate as? DataTaskDelegate {
+            delegate.urlSession(
+                session,
+                dataTask: dataTask,
+                willCacheResponse: proposedResponse,
+                completionHandler: completionHandler
+            )
+        } else {
+            completionHandler(proposedResponse)
+        }
+    }
+}
+
+// MARK: - URLSessionDownloadDelegate
+
+extension SessionDelegate: URLSessionDownloadDelegate {
+    /// Tells the delegate that a download task has finished downloading.
+    ///
+    /// - parameter session:      The session containing the download task that finished.
+    /// - parameter downloadTask: The download task that finished.
+    /// - parameter location:     A file URL for the temporary file. Because the file is temporary, you must either
+    ///                           open the file for reading or move it to a permanent location in your app’s sandbox
+    ///                           container directory before returning from this delegate method.
+    open func urlSession(
+        _ session: URLSession,
+        downloadTask: URLSessionDownloadTask,
+        didFinishDownloadingTo location: URL) {
+        if let downloadTaskDidFinishDownloadingToURL = downloadTaskDidFinishDownloadingToURL {
+            downloadTaskDidFinishDownloadingToURL(session, downloadTask, location)
+        } else if let delegate = self[downloadTask]?.delegate as? DownloadTaskDelegate {
+            delegate.urlSession(session, downloadTask: downloadTask, didFinishDownloadingTo: location)
+        }
+    }
+
+    /// Periodically informs the delegate about the download’s progress.
+    ///
+    /// - parameter session:                   The session containing the download task.
+    /// - parameter downloadTask:              The download task.
+    /// - parameter bytesWritten:              The number of bytes transferred since the last time this delegate
+    ///                                        method was called.
+    /// - parameter totalBytesWritten:         The total number of bytes transferred so far.
+    /// - parameter totalBytesExpectedToWrite: The expected length of the file, as provided by the Content-Length
+    ///                                        header. If this header was not provided, the value is
+    ///                                        `NSURLSessionTransferSizeUnknown`.
+    open func urlSession(
+        _ session: URLSession,
+        downloadTask: URLSessionDownloadTask,
+        didWriteData bytesWritten: Int64,
+        totalBytesWritten: Int64,
+        totalBytesExpectedToWrite: Int64) {
+        if let downloadTaskDidWriteData = downloadTaskDidWriteData {
+            downloadTaskDidWriteData(session, downloadTask, bytesWritten, totalBytesWritten, totalBytesExpectedToWrite)
+        } else if let delegate = self[downloadTask]?.delegate as? DownloadTaskDelegate {
+            delegate.urlSession(
+                session,
+                downloadTask: downloadTask,
+                didWriteData: bytesWritten,
+                totalBytesWritten: totalBytesWritten,
+                totalBytesExpectedToWrite: totalBytesExpectedToWrite
+            )
+        }
+    }
+
+    /// Tells the delegate that the download task has resumed downloading.
+    ///
+    /// - parameter session:            The session containing the download task that finished.
+    /// - parameter downloadTask:       The download task that resumed. See explanation in the discussion.
+    /// - parameter fileOffset:         If the file's cache policy or last modified date prevents reuse of the
+    ///                                 existing content, then this value is zero. Otherwise, this value is an
+    ///                                 integer representing the number of bytes on disk that do not need to be
+    ///                                 retrieved again.
+    /// - parameter expectedTotalBytes: The expected length of the file, as provided by the Content-Length header.
+    ///                                 If this header was not provided, the value is NSURLSessionTransferSizeUnknown.
+    open func urlSession(
+        _ session: URLSession,
+        downloadTask: URLSessionDownloadTask,
+        didResumeAtOffset fileOffset: Int64,
+        expectedTotalBytes: Int64) {
+        if let downloadTaskDidResumeAtOffset = downloadTaskDidResumeAtOffset {
+            downloadTaskDidResumeAtOffset(session, downloadTask, fileOffset, expectedTotalBytes)
+        } else if let delegate = self[downloadTask]?.delegate as? DownloadTaskDelegate {
+            delegate.urlSession(
+                session,
+                downloadTask: downloadTask,
+                didResumeAtOffset: fileOffset,
+                expectedTotalBytes: expectedTotalBytes
+            )
+        }
+    }
+}
+
+// MARK: - URLSessionStreamDelegate
+
+#if !os(watchOS)
+
+@available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+extension SessionDelegate: URLSessionStreamDelegate {
+    /// Tells the delegate that the read side of the connection has been closed.
+    ///
+    /// - parameter session:    The session.
+    /// - parameter streamTask: The stream task.
+    open func urlSession(_ session: URLSession, readClosedFor streamTask: URLSessionStreamTask) {
+        streamTaskReadClosed?(session, streamTask)
+    }
+
+    /// Tells the delegate that the write side of the connection has been closed.
+    ///
+    /// - parameter session:    The session.
+    /// - parameter streamTask: The stream task.
+    open func urlSession(_ session: URLSession, writeClosedFor streamTask: URLSessionStreamTask) {
+        streamTaskWriteClosed?(session, streamTask)
+    }
+
+    /// Tells the delegate that the system has determined that a better route to the host is available.
+    ///
+    /// - parameter session:    The session.
+    /// - parameter streamTask: The stream task.
+    open func urlSession(_ session: URLSession, betterRouteDiscoveredFor streamTask: URLSessionStreamTask) {
+        streamTaskBetterRouteDiscovered?(session, streamTask)
+    }
+
+    /// Tells the delegate that the stream task has been completed and provides the unopened stream objects.
+    ///
+    /// - parameter session:      The session.
+    /// - parameter streamTask:   The stream task.
+    /// - parameter inputStream:  The new input stream.
+    /// - parameter outputStream: The new output stream.
+    open func urlSession(
+        _ session: URLSession,
+        streamTask: URLSessionStreamTask,
+        didBecome inputStream: InputStream,
+        outputStream: OutputStream) {
+        streamTaskDidBecomeInputAndOutputStreams?(session, streamTask, inputStream, outputStream)
+    }
+}
+
+#endif

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/SessionManager.swift

@@ -0,0 +1,886 @@
+//
+//  SessionManager.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Responsible for creating and managing `Request` objects, as well as their underlying `NSURLSession`.
+open class SessionManager {
+
+    // MARK: - Helper Types
+
+    /// Defines whether the `MultipartFormData` encoding was successful and contains result of the encoding as
+    /// associated values.
+    ///
+    /// - Success: Represents a successful `MultipartFormData` encoding and contains the new `UploadRequest` along with
+    ///            streaming information.
+    /// - Failure: Used to represent a failure in the `MultipartFormData` encoding and also contains the encoding
+    ///            error.
+    public enum MultipartFormDataEncodingResult {
+        case success(request: UploadRequest, streamingFromDisk: Bool, streamFileURL: URL?)
+        case failure(Error)
+    }
+
+    // MARK: - Properties
+
+    /// A default instance of `SessionManager`, used by top-level Alamofire request methods, and suitable for use
+    /// directly for any ad hoc requests.
+    public static let `default`: SessionManager = {
+        let configuration = URLSessionConfiguration.default
+        configuration.httpAdditionalHeaders = SessionManager.defaultHTTPHeaders
+
+        return SessionManager(configuration: configuration)
+    }()
+
+    /// Creates default values for the "Accept-Encoding", "Accept-Language" and "User-Agent" headers.
+    public static let defaultHTTPHeaders: HTTPHeaders = {
+        // Accept-Encoding HTTP Header; see https://tools.ietf.org/html/rfc7230#section-4.2.3
+        let acceptEncoding: String = "gzip;q=1.0, compress;q=0.5"
+
+        // Accept-Language HTTP Header; see https://tools.ietf.org/html/rfc7231#section-5.3.5
+        let acceptLanguage = Locale.preferredLanguages.prefix(6).enumerated().map { index, languageCode in
+            let quality = 1.0 - (Double(index) * 0.1)
+            return "\(languageCode);q=\(quality)"
+        }.joined(separator: ", ")
+
+        // User-Agent Header; see https://tools.ietf.org/html/rfc7231#section-5.5.3
+        // Example: `iOS Example/1.0 (org.alamofire.iOS-Example; build:1; iOS 10.0.0) Alamofire/4.0.0`
+        let userAgent: String = {
+            if let info = Bundle.main.infoDictionary {
+                let executable = info[kCFBundleExecutableKey as String] as? String ?? "Unknown"
+                let bundle = info[kCFBundleIdentifierKey as String] as? String ?? "Unknown"
+                let appVersion = info["CFBundleShortVersionString"] as? String ?? "Unknown"
+                let appBuild = info[kCFBundleVersionKey as String] as? String ?? "Unknown"
+
+                let osNameVersion: String = {
+                    let version = ProcessInfo.processInfo.operatingSystemVersion
+                    let versionString = "\(version.majorVersion).\(version.minorVersion).\(version.patchVersion)"
+
+                    let osName: String = {
+                        #if os(iOS)
+                            return "iOS"
+                        #elseif os(watchOS)
+                            return "watchOS"
+                        #elseif os(tvOS)
+                            return "tvOS"
+                        #elseif os(macOS)
+                            return "OS X"
+                        #elseif os(Linux)
+                            return "Linux"
+                        #else
+                            return "Unknown"
+                        #endif
+                    }()
+
+                    return "\(osName) \(versionString)"
+                }()
+
+                let alamofireVersion: String = {
+                    guard
+                        let afInfo = Bundle(for: SessionManager.self).infoDictionary,
+                        let build = afInfo["CFBundleShortVersionString"]
+                    else { return "Unknown" }
+
+                    return "Alamofire/\(build)"
+                }()
+
+                return "\(executable)/\(appVersion) (\(bundle); build:\(appBuild); \(osNameVersion)) \(alamofireVersion)"
+            }
+
+            return "Alamofire"
+        }()
+
+        return [
+            "Accept-Encoding": acceptEncoding,
+            "Accept-Language": acceptLanguage,
+            "User-Agent": userAgent
+        ]
+    }()
+
+    /// Default memory threshold used when encoding `MultipartFormData` in bytes.
+    public static let multipartFormDataEncodingMemoryThreshold: UInt64 = 10_000_000
+
+    /// The underlying session.
+    public let session: URLSession
+
+    /// The session delegate handling all the task and session delegate callbacks.
+    public let delegate: SessionDelegate
+
+    /// Whether to start requests immediately after being constructed. `true` by default.
+    open var startRequestsImmediately: Bool = true
+
+    /// The request adapter called each time a new request is created.
+    open var adapter: RequestAdapter?
+
+    /// The request retrier called each time a request encounters an error to determine whether to retry the request.
+    open var retrier: RequestRetrier? {
+        get { return delegate.retrier }
+        set { delegate.retrier = newValue }
+    }
+
+    /// The background completion handler closure provided by the UIApplicationDelegate
+    /// `application:handleEventsForBackgroundURLSession:completionHandler:` method. By setting the background
+    /// completion handler, the SessionDelegate `sessionDidFinishEventsForBackgroundURLSession` closure implementation
+    /// will automatically call the handler.
+    ///
+    /// If you need to handle your own events before the handler is called, then you need to override the
+    /// SessionDelegate `sessionDidFinishEventsForBackgroundURLSession` and manually call the handler when finished.
+    ///
+    /// `nil` by default.
+    open var backgroundCompletionHandler: (() -> Void)?
+
+    let queue = DispatchQueue(label: "org.alamofire.session-manager." + UUID().uuidString)
+
+    // MARK: - Lifecycle
+
+    /// Creates an instance with the specified `configuration`, `delegate` and `serverTrustPolicyManager`.
+    ///
+    /// - parameter configuration:            The configuration used to construct the managed session.
+    ///                                       `URLSessionConfiguration.default` by default.
+    /// - parameter delegate:                 The delegate used when initializing the session. `SessionDelegate()` by
+    ///                                       default.
+    /// - parameter serverTrustPolicyManager: The server trust policy manager to use for evaluating all server trust
+    ///                                       challenges. `nil` by default.
+    ///
+    /// - returns: The new `SessionManager` instance.
+    public init(
+        configuration: URLSessionConfiguration = URLSessionConfiguration.default,
+        delegate: SessionDelegate = SessionDelegate(),
+        serverTrustPolicyManager: ServerTrustPolicyManager? = nil) {
+        self.delegate = delegate
+        self.session = URLSession(configuration: configuration, delegate: delegate, delegateQueue: nil)
+
+        commonInit(serverTrustPolicyManager: serverTrustPolicyManager)
+    }
+
+    /// Creates an instance with the specified `session`, `delegate` and `serverTrustPolicyManager`.
+    ///
+    /// - parameter session:                  The URL session.
+    /// - parameter delegate:                 The delegate of the URL session. Must equal the URL session's delegate.
+    /// - parameter serverTrustPolicyManager: The server trust policy manager to use for evaluating all server trust
+    ///                                       challenges. `nil` by default.
+    ///
+    /// - returns: The new `SessionManager` instance if the URL session's delegate matches; `nil` otherwise.
+    public init?(
+        session: URLSession,
+        delegate: SessionDelegate,
+        serverTrustPolicyManager: ServerTrustPolicyManager? = nil) {
+        guard delegate === session.delegate else { return nil }
+
+        self.delegate = delegate
+        self.session = session
+
+        commonInit(serverTrustPolicyManager: serverTrustPolicyManager)
+    }
+
+    private func commonInit(serverTrustPolicyManager: ServerTrustPolicyManager?) {
+        session.serverTrustPolicyManager = serverTrustPolicyManager
+
+        delegate.sessionManager = self
+
+        delegate.sessionDidFinishEventsForBackgroundURLSession = { [weak self] session in
+            guard let strongSelf = self else { return }
+            DispatchQueue.main.async { strongSelf.backgroundCompletionHandler?() }
+        }
+    }
+
+    deinit {
+        session.invalidateAndCancel()
+    }
+
+    // MARK: - Data Request
+
+    /// Creates a `DataRequest` to retrieve the contents of the specified `url`, `method`, `parameters`, `encoding`
+    /// and `headers`.
+    ///
+    /// - parameter url:        The URL.
+    /// - parameter method:     The HTTP method. `.get` by default.
+    /// - parameter parameters: The parameters. `nil` by default.
+    /// - parameter encoding:   The parameter encoding. `URLEncoding.default` by default.
+    /// - parameter headers:    The HTTP headers. `nil` by default.
+    ///
+    /// - returns: The created `DataRequest`.
+    @discardableResult
+    open func request(
+        _ url: URLConvertible,
+        method: HTTPMethod = .get,
+        parameters: Parameters? = nil,
+        encoding: ParameterEncoding = URLEncoding.default,
+        headers: HTTPHeaders? = nil)
+        -> DataRequest {
+        var originalRequest: URLRequest?
+
+        do {
+            originalRequest = try URLRequest(url: url, method: method, headers: headers)
+            let encodedURLRequest = try encoding.encode(originalRequest!, with: parameters)
+            return request(encodedURLRequest)
+        } catch {
+            return request(originalRequest, failedWith: error)
+        }
+    }
+
+    /// Creates a `DataRequest` to retrieve the contents of a URL based on the specified `urlRequest`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter urlRequest: The URL request.
+    ///
+    /// - returns: The created `DataRequest`.
+    @discardableResult
+    open func request(_ urlRequest: URLRequestConvertible) -> DataRequest {
+        var originalRequest: URLRequest?
+
+        do {
+            originalRequest = try urlRequest.asURLRequest()
+            let originalTask = DataRequest.Requestable(urlRequest: originalRequest!)
+
+            let task = try originalTask.task(session: session, adapter: adapter, queue: queue)
+            let request = DataRequest(session: session, requestTask: .data(originalTask, task))
+
+            delegate[task] = request
+
+            if startRequestsImmediately { request.resume() }
+
+            return request
+        } catch {
+            return request(originalRequest, failedWith: error)
+        }
+    }
+
+    // MARK: Private - Request Implementation
+
+    private func request(_ urlRequest: URLRequest?, failedWith error: Error) -> DataRequest {
+        var requestTask: Request.RequestTask = .data(nil, nil)
+
+        if let urlRequest = urlRequest {
+            let originalTask = DataRequest.Requestable(urlRequest: urlRequest)
+            requestTask = .data(originalTask, nil)
+        }
+
+        let underlyingError = error.underlyingAdaptError ?? error
+        let request = DataRequest(session: session, requestTask: requestTask, error: underlyingError)
+
+        if let retrier = retrier, error is AdaptError {
+            allowRetrier(retrier, toRetry: request, with: underlyingError)
+        } else {
+            if startRequestsImmediately { request.resume() }
+        }
+
+        return request
+    }
+
+    // MARK: - Download Request
+
+    // MARK: URL Request
+
+    /// Creates a `DownloadRequest` to retrieve the contents the specified `url`, `method`, `parameters`, `encoding`,
+    /// `headers` and save them to the `destination`.
+    ///
+    /// If `destination` is not specified, the contents will remain in the temporary location determined by the
+    /// underlying URL session.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter url:         The URL.
+    /// - parameter method:      The HTTP method. `.get` by default.
+    /// - parameter parameters:  The parameters. `nil` by default.
+    /// - parameter encoding:    The parameter encoding. `URLEncoding.default` by default.
+    /// - parameter headers:     The HTTP headers. `nil` by default.
+    /// - parameter destination: The closure used to determine the destination of the downloaded file. `nil` by default.
+    ///
+    /// - returns: The created `DownloadRequest`.
+    @discardableResult
+    open func download(
+        _ url: URLConvertible,
+        method: HTTPMethod = .get,
+        parameters: Parameters? = nil,
+        encoding: ParameterEncoding = URLEncoding.default,
+        headers: HTTPHeaders? = nil,
+        to destination: DownloadRequest.DownloadFileDestination? = nil)
+        -> DownloadRequest {
+        do {
+            let urlRequest = try URLRequest(url: url, method: method, headers: headers)
+            let encodedURLRequest = try encoding.encode(urlRequest, with: parameters)
+            return download(encodedURLRequest, to: destination)
+        } catch {
+            return download(nil, to: destination, failedWith: error)
+        }
+    }
+
+    /// Creates a `DownloadRequest` to retrieve the contents of a URL based on the specified `urlRequest` and save
+    /// them to the `destination`.
+    ///
+    /// If `destination` is not specified, the contents will remain in the temporary location determined by the
+    /// underlying URL session.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter urlRequest:  The URL request
+    /// - parameter destination: The closure used to determine the destination of the downloaded file. `nil` by default.
+    ///
+    /// - returns: The created `DownloadRequest`.
+    @discardableResult
+    open func download(
+        _ urlRequest: URLRequestConvertible,
+        to destination: DownloadRequest.DownloadFileDestination? = nil)
+        -> DownloadRequest {
+        do {
+            let urlRequest = try urlRequest.asURLRequest()
+            return download(.request(urlRequest), to: destination)
+        } catch {
+            return download(nil, to: destination, failedWith: error)
+        }
+    }
+
+    // MARK: Resume Data
+
+    /// Creates a `DownloadRequest` from the `resumeData` produced from a previous request cancellation to retrieve
+    /// the contents of the original request and save them to the `destination`.
+    ///
+    /// If `destination` is not specified, the contents will remain in the temporary location determined by the
+    /// underlying URL session.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// On the latest release of all the Apple platforms (iOS 10, macOS 10.12, tvOS 10, watchOS 3), `resumeData` is broken
+    /// on background URL session configurations. There's an underlying bug in the `resumeData` generation logic where the
+    /// data is written incorrectly and will always fail to resume the download. For more information about the bug and
+    /// possible workarounds, please refer to the following Stack Overflow post:
+    ///
+    ///    - http://stackoverflow.com/a/39347461/1342462
+    ///
+    /// - parameter resumeData:  The resume data. This is an opaque data blob produced by `URLSessionDownloadTask`
+    ///                          when a task is cancelled. See `URLSession -downloadTask(withResumeData:)` for
+    ///                          additional information.
+    /// - parameter destination: The closure used to determine the destination of the downloaded file. `nil` by default.
+    ///
+    /// - returns: The created `DownloadRequest`.
+    @discardableResult
+    open func download(
+        resumingWith resumeData: Data,
+        to destination: DownloadRequest.DownloadFileDestination? = nil)
+        -> DownloadRequest {
+        return download(.resumeData(resumeData), to: destination)
+    }
+
+    // MARK: Private - Download Implementation
+
+    private func download(
+        _ downloadable: DownloadRequest.Downloadable,
+        to destination: DownloadRequest.DownloadFileDestination?)
+        -> DownloadRequest {
+        do {
+            let task = try downloadable.task(session: session, adapter: adapter, queue: queue)
+            let download = DownloadRequest(session: session, requestTask: .download(downloadable, task))
+
+            download.downloadDelegate.destination = destination
+
+            delegate[task] = download
+
+            if startRequestsImmediately { download.resume() }
+
+            return download
+        } catch {
+            return download(downloadable, to: destination, failedWith: error)
+        }
+    }
+
+    private func download(
+        _ downloadable: DownloadRequest.Downloadable?,
+        to destination: DownloadRequest.DownloadFileDestination?,
+        failedWith error: Error)
+        -> DownloadRequest {
+        var downloadTask: Request.RequestTask = .download(nil, nil)
+
+        if let downloadable = downloadable {
+            downloadTask = .download(downloadable, nil)
+        }
+
+        let underlyingError = error.underlyingAdaptError ?? error
+
+        let download = DownloadRequest(session: session, requestTask: downloadTask, error: underlyingError)
+        download.downloadDelegate.destination = destination
+
+        if let retrier = retrier, error is AdaptError {
+            allowRetrier(retrier, toRetry: download, with: underlyingError)
+        } else {
+            if startRequestsImmediately { download.resume() }
+        }
+
+        return download
+    }
+
+    // MARK: - Upload Request
+
+    // MARK: File
+
+    /// Creates an `UploadRequest` from the specified `url`, `method` and `headers` for uploading the `file`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter file:    The file to upload.
+    /// - parameter url:     The URL.
+    /// - parameter method:  The HTTP method. `.post` by default.
+    /// - parameter headers: The HTTP headers. `nil` by default.
+    ///
+    /// - returns: The created `UploadRequest`.
+    @discardableResult
+    open func upload(
+        _ fileURL: URL,
+        to url: URLConvertible,
+        method: HTTPMethod = .post,
+        headers: HTTPHeaders? = nil)
+        -> UploadRequest {
+        do {
+            let urlRequest = try URLRequest(url: url, method: method, headers: headers)
+            return upload(fileURL, with: urlRequest)
+        } catch {
+            return upload(nil, failedWith: error)
+        }
+    }
+
+    /// Creates a `UploadRequest` from the specified `urlRequest` for uploading the `file`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter file:       The file to upload.
+    /// - parameter urlRequest: The URL request.
+    ///
+    /// - returns: The created `UploadRequest`.
+    @discardableResult
+    open func upload(_ fileURL: URL, with urlRequest: URLRequestConvertible) -> UploadRequest {
+        do {
+            let urlRequest = try urlRequest.asURLRequest()
+            return upload(.file(fileURL, urlRequest))
+        } catch {
+            return upload(nil, failedWith: error)
+        }
+    }
+
+    // MARK: Data
+
+    /// Creates an `UploadRequest` from the specified `url`, `method` and `headers` for uploading the `data`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter data:    The data to upload.
+    /// - parameter url:     The URL.
+    /// - parameter method:  The HTTP method. `.post` by default.
+    /// - parameter headers: The HTTP headers. `nil` by default.
+    ///
+    /// - returns: The created `UploadRequest`.
+    @discardableResult
+    open func upload(
+        _ data: Data,
+        to url: URLConvertible,
+        method: HTTPMethod = .post,
+        headers: HTTPHeaders? = nil)
+        -> UploadRequest {
+        do {
+            let urlRequest = try URLRequest(url: url, method: method, headers: headers)
+            return upload(data, with: urlRequest)
+        } catch {
+            return upload(nil, failedWith: error)
+        }
+    }
+
+    /// Creates an `UploadRequest` from the specified `urlRequest` for uploading the `data`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter data:       The data to upload.
+    /// - parameter urlRequest: The URL request.
+    ///
+    /// - returns: The created `UploadRequest`.
+    @discardableResult
+    open func upload(_ data: Data, with urlRequest: URLRequestConvertible) -> UploadRequest {
+        do {
+            let urlRequest = try urlRequest.asURLRequest()
+            return upload(.data(data, urlRequest))
+        } catch {
+            return upload(nil, failedWith: error)
+        }
+    }
+
+    // MARK: InputStream
+
+    /// Creates an `UploadRequest` from the specified `url`, `method` and `headers` for uploading the `stream`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter stream:  The stream to upload.
+    /// - parameter url:     The URL.
+    /// - parameter method:  The HTTP method. `.post` by default.
+    /// - parameter headers: The HTTP headers. `nil` by default.
+    ///
+    /// - returns: The created `UploadRequest`.
+    @discardableResult
+    open func upload(
+        _ stream: InputStream,
+        to url: URLConvertible,
+        method: HTTPMethod = .post,
+        headers: HTTPHeaders? = nil)
+        -> UploadRequest {
+        do {
+            let urlRequest = try URLRequest(url: url, method: method, headers: headers)
+            return upload(stream, with: urlRequest)
+        } catch {
+            return upload(nil, failedWith: error)
+        }
+    }
+
+    /// Creates an `UploadRequest` from the specified `urlRequest` for uploading the `stream`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter stream:     The stream to upload.
+    /// - parameter urlRequest: The URL request.
+    ///
+    /// - returns: The created `UploadRequest`.
+    @discardableResult
+    open func upload(_ stream: InputStream, with urlRequest: URLRequestConvertible) -> UploadRequest {
+        do {
+            let urlRequest = try urlRequest.asURLRequest()
+            return upload(.stream(stream, urlRequest))
+        } catch {
+            return upload(nil, failedWith: error)
+        }
+    }
+
+    // MARK: MultipartFormData
+
+    /// Encodes `multipartFormData` using `encodingMemoryThreshold` and calls `encodingCompletion` with new
+    /// `UploadRequest` using the `url`, `method` and `headers`.
+    ///
+    /// It is important to understand the memory implications of uploading `MultipartFormData`. If the cummulative
+    /// payload is small, encoding the data in-memory and directly uploading to a server is the by far the most
+    /// efficient approach. However, if the payload is too large, encoding the data in-memory could cause your app to
+    /// be terminated. Larger payloads must first be written to disk using input and output streams to keep the memory
+    /// footprint low, then the data can be uploaded as a stream from the resulting file. Streaming from disk MUST be
+    /// used for larger payloads such as video content.
+    ///
+    /// The `encodingMemoryThreshold` parameter allows Alamofire to automatically determine whether to encode in-memory
+    /// or stream from disk. If the content length of the `MultipartFormData` is below the `encodingMemoryThreshold`,
+    /// encoding takes place in-memory. If the content length exceeds the threshold, the data is streamed to disk
+    /// during the encoding process. Then the result is uploaded as data or as a stream depending on which encoding
+    /// technique was used.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter multipartFormData:       The closure used to append body parts to the `MultipartFormData`.
+    /// - parameter encodingMemoryThreshold: The encoding memory threshold in bytes.
+    ///                                      `multipartFormDataEncodingMemoryThreshold` by default.
+    /// - parameter url:                     The URL.
+    /// - parameter method:                  The HTTP method. `.post` by default.
+    /// - parameter headers:                 The HTTP headers. `nil` by default.
+    /// - parameter encodingCompletion:      The closure called when the `MultipartFormData` encoding is complete.
+    open func upload(
+        multipartFormData: @escaping (MultipartFormData) -> Void,
+        usingThreshold encodingMemoryThreshold: UInt64 = SessionManager.multipartFormDataEncodingMemoryThreshold,
+        to url: URLConvertible,
+        method: HTTPMethod = .post,
+        headers: HTTPHeaders? = nil,
+        queue: DispatchQueue? = nil,
+        encodingCompletion: ((MultipartFormDataEncodingResult) -> Void)?) {
+        do {
+            let urlRequest = try URLRequest(url: url, method: method, headers: headers)
+
+            return upload(
+                multipartFormData: multipartFormData,
+                usingThreshold: encodingMemoryThreshold,
+                with: urlRequest,
+                queue: queue,
+                encodingCompletion: encodingCompletion
+            )
+        } catch {
+            (queue ?? DispatchQueue.main).async { encodingCompletion?(.failure(error)) }
+        }
+    }
+
+    /// Encodes `multipartFormData` using `encodingMemoryThreshold` and calls `encodingCompletion` with new
+    /// `UploadRequest` using the `urlRequest`.
+    ///
+    /// It is important to understand the memory implications of uploading `MultipartFormData`. If the cummulative
+    /// payload is small, encoding the data in-memory and directly uploading to a server is the by far the most
+    /// efficient approach. However, if the payload is too large, encoding the data in-memory could cause your app to
+    /// be terminated. Larger payloads must first be written to disk using input and output streams to keep the memory
+    /// footprint low, then the data can be uploaded as a stream from the resulting file. Streaming from disk MUST be
+    /// used for larger payloads such as video content.
+    ///
+    /// The `encodingMemoryThreshold` parameter allows Alamofire to automatically determine whether to encode in-memory
+    /// or stream from disk. If the content length of the `MultipartFormData` is below the `encodingMemoryThreshold`,
+    /// encoding takes place in-memory. If the content length exceeds the threshold, the data is streamed to disk
+    /// during the encoding process. Then the result is uploaded as data or as a stream depending on which encoding
+    /// technique was used.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter multipartFormData:       The closure used to append body parts to the `MultipartFormData`.
+    /// - parameter encodingMemoryThreshold: The encoding memory threshold in bytes.
+    ///                                      `multipartFormDataEncodingMemoryThreshold` by default.
+    /// - parameter urlRequest:              The URL request.
+    /// - parameter encodingCompletion:      The closure called when the `MultipartFormData` encoding is complete.
+    open func upload(
+        multipartFormData: @escaping (MultipartFormData) -> Void,
+        usingThreshold encodingMemoryThreshold: UInt64 = SessionManager.multipartFormDataEncodingMemoryThreshold,
+        with urlRequest: URLRequestConvertible,
+        queue: DispatchQueue? = nil,
+        encodingCompletion: ((MultipartFormDataEncodingResult) -> Void)?) {
+        DispatchQueue.global(qos: .utility).async {
+            let formData = MultipartFormData()
+            multipartFormData(formData)
+
+            var tempFileURL: URL?
+
+            do {
+                var urlRequestWithContentType = try urlRequest.asURLRequest()
+                urlRequestWithContentType.setValue(formData.contentType, forHTTPHeaderField: "Content-Type")
+
+                let isBackgroundSession = self.session.configuration.identifier != nil
+
+                if formData.contentLength < encodingMemoryThreshold && !isBackgroundSession {
+                    let data = try formData.encode()
+
+                    let encodingResult = MultipartFormDataEncodingResult.success(
+                        request: self.upload(data, with: urlRequestWithContentType),
+                        streamingFromDisk: false,
+                        streamFileURL: nil
+                    )
+
+                    (queue ?? DispatchQueue.main).async { encodingCompletion?(encodingResult) }
+                } else {
+                    let fileManager = FileManager.default
+                    let tempDirectoryURL = URL(fileURLWithPath: NSTemporaryDirectory())
+                    let directoryURL = tempDirectoryURL.appendingPathComponent("org.alamofire.manager/multipart.form.data")
+                    let fileName = UUID().uuidString
+                    let fileURL = directoryURL.appendingPathComponent(fileName)
+
+                    tempFileURL = fileURL
+
+                    var directoryError: Error?
+
+                    // Create directory inside serial queue to ensure two threads don't do this in parallel
+                    self.queue.sync {
+                        do {
+                            try fileManager.createDirectory(at: directoryURL, withIntermediateDirectories: true, attributes: nil)
+                        } catch {
+                            directoryError = error
+                        }
+                    }
+
+                    if let directoryError = directoryError { throw directoryError }
+
+                    try formData.writeEncodedData(to: fileURL)
+
+                    let upload = self.upload(fileURL, with: urlRequestWithContentType)
+
+                    // Cleanup the temp file once the upload is complete
+                    upload.delegate.queue.addOperation {
+                        do {
+                            try FileManager.default.removeItem(at: fileURL)
+                        } catch {
+                            // No-op
+                        }
+                    }
+
+                    (queue ?? DispatchQueue.main).async {
+                        let encodingResult = MultipartFormDataEncodingResult.success(
+                            request: upload,
+                            streamingFromDisk: true,
+                            streamFileURL: fileURL
+                        )
+
+                        encodingCompletion?(encodingResult)
+                    }
+                }
+            } catch {
+                // Cleanup the temp file in the event that the multipart form data encoding failed
+                if let tempFileURL = tempFileURL {
+                    do {
+                        try FileManager.default.removeItem(at: tempFileURL)
+                    } catch {
+                        // No-op
+                    }
+                }
+
+                (queue ?? DispatchQueue.main).async { encodingCompletion?(.failure(error)) }
+            }
+        }
+    }
+
+    // MARK: Private - Upload Implementation
+
+    private func upload(_ uploadable: UploadRequest.Uploadable) -> UploadRequest {
+        do {
+            let task = try uploadable.task(session: session, adapter: adapter, queue: queue)
+            let upload = UploadRequest(session: session, requestTask: .upload(uploadable, task))
+
+            if case let .stream(inputStream, _) = uploadable {
+                upload.delegate.taskNeedNewBodyStream = { _, _ in inputStream }
+            }
+
+            delegate[task] = upload
+
+            if startRequestsImmediately { upload.resume() }
+
+            return upload
+        } catch {
+            return upload(uploadable, failedWith: error)
+        }
+    }
+
+    private func upload(_ uploadable: UploadRequest.Uploadable?, failedWith error: Error) -> UploadRequest {
+        var uploadTask: Request.RequestTask = .upload(nil, nil)
+
+        if let uploadable = uploadable {
+            uploadTask = .upload(uploadable, nil)
+        }
+
+        let underlyingError = error.underlyingAdaptError ?? error
+        let upload = UploadRequest(session: session, requestTask: uploadTask, error: underlyingError)
+
+        if let retrier = retrier, error is AdaptError {
+            allowRetrier(retrier, toRetry: upload, with: underlyingError)
+        } else {
+            if startRequestsImmediately { upload.resume() }
+        }
+
+        return upload
+    }
+
+#if !os(watchOS)
+
+    // MARK: - Stream Request
+
+    // MARK: Hostname and Port
+
+    /// Creates a `StreamRequest` for bidirectional streaming using the `hostname` and `port`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter hostName: The hostname of the server to connect to.
+    /// - parameter port:     The port of the server to connect to.
+    ///
+    /// - returns: The created `StreamRequest`.
+    @discardableResult
+    @available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+    open func stream(withHostName hostName: String, port: Int) -> StreamRequest {
+        return stream(.stream(hostName: hostName, port: port))
+    }
+
+    // MARK: NetService
+
+    /// Creates a `StreamRequest` for bidirectional streaming using the `netService`.
+    ///
+    /// If `startRequestsImmediately` is `true`, the request will have `resume()` called before being returned.
+    ///
+    /// - parameter netService: The net service used to identify the endpoint.
+    ///
+    /// - returns: The created `StreamRequest`.
+    @discardableResult
+    @available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+    open func stream(with netService: NetService) -> StreamRequest {
+        return stream(.netService(netService))
+    }
+
+    // MARK: Private - Stream Implementation
+
+    @available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+    private func stream(_ streamable: StreamRequest.Streamable) -> StreamRequest {
+        do {
+            let task = try streamable.task(session: session, adapter: adapter, queue: queue)
+            let request = StreamRequest(session: session, requestTask: .stream(streamable, task))
+
+            delegate[task] = request
+
+            if startRequestsImmediately { request.resume() }
+
+            return request
+        } catch {
+            return stream(failedWith: error)
+        }
+    }
+
+    @available(iOS 9.0, macOS 10.11, tvOS 9.0, *)
+    private func stream(failedWith error: Error) -> StreamRequest {
+        let stream = StreamRequest(session: session, requestTask: .stream(nil, nil), error: error)
+        if startRequestsImmediately { stream.resume() }
+        return stream
+    }
+
+#endif
+
+    // MARK: - Internal - Retry Request
+
+    func retry(_ request: Request) -> Bool {
+        guard let originalTask = request.originalTask else { return false }
+
+        do {
+            let task = try originalTask.task(session: session, adapter: adapter, queue: queue)
+
+            if let originalTask = request.task {
+                delegate[originalTask] = nil // removes the old request to avoid endless growth
+            }
+
+            request.delegate.task = task // resets all task delegate data
+
+            request.retryCount += 1
+            request.startTime = CFAbsoluteTimeGetCurrent()
+            request.endTime = nil
+
+            task.resume()
+
+            return true
+        } catch {
+            request.delegate.error = error.underlyingAdaptError ?? error
+            return false
+        }
+    }
+
+    private func allowRetrier(_ retrier: RequestRetrier, toRetry request: Request, with error: Error) {
+        DispatchQueue.utility.async { [weak self] in
+            guard let strongSelf = self else { return }
+
+            retrier.should(strongSelf, retry: request, with: error) { shouldRetry, timeDelay in
+                guard let strongSelf = self else { return }
+
+                guard shouldRetry else {
+                    if strongSelf.startRequestsImmediately { request.resume() }
+                    return
+                }
+
+                DispatchQueue.utility.after(timeDelay) {
+                    guard let strongSelf = self else { return }
+
+                    let retrySucceeded = strongSelf.retry(request)
+
+                    if retrySucceeded, let task = request.task {
+                        strongSelf.delegate[task] = request
+                    } else {
+                        if strongSelf.startRequestsImmediately { request.resume() }
+                    }
+                }
+            }
+        }
+    }
+}

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/TaskDelegate.swift

@@ -0,0 +1,456 @@
+//
+//  TaskDelegate.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// The task delegate is responsible for handling all delegate callbacks for the underlying task as well as
+/// executing all operations attached to the serial operation queue upon task completion.
+open class TaskDelegate: NSObject {
+
+    // MARK: Properties
+
+    /// The serial operation queue used to execute all operations after the task completes.
+    public let queue: OperationQueue
+
+    /// The data returned by the server.
+    public var data: Data? { return nil }
+
+    /// The error generated throughout the lifecyle of the task.
+    public var error: Error?
+
+    var task: URLSessionTask? {
+        set {
+            taskLock.lock(); defer { taskLock.unlock() }
+            _task = newValue
+        }
+        get {
+            taskLock.lock(); defer { taskLock.unlock() }
+            return _task
+        }
+    }
+
+    var initialResponseTime: CFAbsoluteTime?
+    var credential: URLCredential?
+    var metrics: AnyObject? // URLSessionTaskMetrics
+
+    private var _task: URLSessionTask? {
+        didSet { reset() }
+    }
+
+    private let taskLock = NSLock()
+
+    // MARK: Lifecycle
+
+    init(task: URLSessionTask?) {
+        _task = task
+
+        self.queue = {
+            let operationQueue = OperationQueue()
+
+            operationQueue.maxConcurrentOperationCount = 1
+            operationQueue.isSuspended = true
+            operationQueue.qualityOfService = .utility
+
+            return operationQueue
+        }()
+    }
+
+    func reset() {
+        error = nil
+        initialResponseTime = nil
+    }
+
+    // MARK: URLSessionTaskDelegate
+
+    var taskWillPerformHTTPRedirection: ((URLSession, URLSessionTask, HTTPURLResponse, URLRequest) -> URLRequest?)?
+    var taskDidReceiveChallenge: ((URLSession, URLSessionTask, URLAuthenticationChallenge) -> (URLSession.AuthChallengeDisposition, URLCredential?))?
+    var taskNeedNewBodyStream: ((URLSession, URLSessionTask) -> InputStream?)?
+    var taskDidCompleteWithError: ((URLSession, URLSessionTask, Error?) -> Void)?
+
+    @objc(URLSession:task:willPerformHTTPRedirection:newRequest:completionHandler:)
+    func urlSession(
+        _ session: URLSession,
+        task: URLSessionTask,
+        willPerformHTTPRedirection response: HTTPURLResponse,
+        newRequest request: URLRequest,
+        completionHandler: @escaping (URLRequest?) -> Void) {
+        var redirectRequest: URLRequest? = request
+
+        if let taskWillPerformHTTPRedirection = taskWillPerformHTTPRedirection {
+            redirectRequest = taskWillPerformHTTPRedirection(session, task, response, request)
+        }
+
+        completionHandler(redirectRequest)
+    }
+
+    @objc(URLSession:task:didReceiveChallenge:completionHandler:)
+    func urlSession(
+        _ session: URLSession,
+        task: URLSessionTask,
+        didReceive challenge: URLAuthenticationChallenge,
+        completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
+        var disposition: URLSession.AuthChallengeDisposition = .performDefaultHandling
+        var credential: URLCredential?
+
+        if let taskDidReceiveChallenge = taskDidReceiveChallenge {
+            (disposition, credential) = taskDidReceiveChallenge(session, task, challenge)
+        } else if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
+            let host = challenge.protectionSpace.host
+
+            if
+                let serverTrustPolicy = session.serverTrustPolicyManager?.serverTrustPolicy(forHost: host),
+                let serverTrust = challenge.protectionSpace.serverTrust
+            {
+                if serverTrustPolicy.evaluate(serverTrust, forHost: host) {
+                    disposition = .useCredential
+                    credential = URLCredential(trust: serverTrust)
+                } else {
+                    disposition = .cancelAuthenticationChallenge
+                }
+            }
+        } else {
+            if challenge.previousFailureCount > 0 {
+                disposition = .rejectProtectionSpace
+            } else {
+                credential = self.credential ?? session.configuration.urlCredentialStorage?.defaultCredential(for: challenge.protectionSpace)
+
+                if credential != nil {
+                    disposition = .useCredential
+                }
+            }
+        }
+
+        completionHandler(disposition, credential)
+    }
+
+    @objc(URLSession:task:needNewBodyStream:)
+    func urlSession(
+        _ session: URLSession,
+        task: URLSessionTask,
+        needNewBodyStream completionHandler: @escaping (InputStream?) -> Void) {
+        var bodyStream: InputStream?
+
+        if let taskNeedNewBodyStream = taskNeedNewBodyStream {
+            bodyStream = taskNeedNewBodyStream(session, task)
+        }
+
+        completionHandler(bodyStream)
+    }
+
+    @objc(URLSession:task:didCompleteWithError:)
+    func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
+        if let taskDidCompleteWithError = taskDidCompleteWithError {
+            taskDidCompleteWithError(session, task, error)
+        } else {
+            if let error = error {
+                if self.error == nil { self.error = error }
+
+                if
+                    let downloadDelegate = self as? DownloadTaskDelegate,
+                    let resumeData = (error as NSError).userInfo[NSURLSessionDownloadTaskResumeData] as? Data
+                {
+                    downloadDelegate.resumeData = resumeData
+                }
+            }
+
+            queue.isSuspended = false
+        }
+    }
+}
+
+// MARK: -
+
+class DataTaskDelegate: TaskDelegate, URLSessionDataDelegate {
+
+    // MARK: Properties
+
+    var dataTask: URLSessionDataTask { return task as! URLSessionDataTask }
+
+    override var data: Data? {
+        if dataStream != nil {
+            return nil
+        } else {
+            return mutableData
+        }
+    }
+
+    var progress: Progress
+    var progressHandler: (closure: Request.ProgressHandler, queue: DispatchQueue)?
+
+    var dataStream: ((_ data: Data) -> Void)?
+
+    private var totalBytesReceived: Int64 = 0
+    private var mutableData: Data
+
+    private var expectedContentLength: Int64?
+
+    // MARK: Lifecycle
+
+    override init(task: URLSessionTask?) {
+        mutableData = Data()
+        progress = Progress(totalUnitCount: 0)
+
+        super.init(task: task)
+    }
+
+    override func reset() {
+        super.reset()
+
+        progress = Progress(totalUnitCount: 0)
+        totalBytesReceived = 0
+        mutableData = Data()
+        expectedContentLength = nil
+    }
+
+    // MARK: URLSessionDataDelegate
+
+    var dataTaskDidReceiveResponse: ((URLSession, URLSessionDataTask, URLResponse) -> URLSession.ResponseDisposition)?
+    var dataTaskDidBecomeDownloadTask: ((URLSession, URLSessionDataTask, URLSessionDownloadTask) -> Void)?
+    var dataTaskDidReceiveData: ((URLSession, URLSessionDataTask, Data) -> Void)?
+    var dataTaskWillCacheResponse: ((URLSession, URLSessionDataTask, CachedURLResponse) -> CachedURLResponse?)?
+
+    func urlSession(
+        _ session: URLSession,
+        dataTask: URLSessionDataTask,
+        didReceive response: URLResponse,
+        completionHandler: @escaping (URLSession.ResponseDisposition) -> Void) {
+        var disposition: URLSession.ResponseDisposition = .allow
+
+        expectedContentLength = response.expectedContentLength
+
+        if let dataTaskDidReceiveResponse = dataTaskDidReceiveResponse {
+            disposition = dataTaskDidReceiveResponse(session, dataTask, response)
+        }
+
+        completionHandler(disposition)
+    }
+
+    func urlSession(
+        _ session: URLSession,
+        dataTask: URLSessionDataTask,
+        didBecome downloadTask: URLSessionDownloadTask) {
+        dataTaskDidBecomeDownloadTask?(session, dataTask, downloadTask)
+    }
+
+    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
+        if initialResponseTime == nil { initialResponseTime = CFAbsoluteTimeGetCurrent() }
+
+        if let dataTaskDidReceiveData = dataTaskDidReceiveData {
+            dataTaskDidReceiveData(session, dataTask, data)
+        } else {
+            if let dataStream = dataStream {
+                dataStream(data)
+            } else {
+                mutableData.append(data)
+            }
+
+            let bytesReceived = Int64(data.count)
+            totalBytesReceived += bytesReceived
+            let totalBytesExpected = dataTask.response?.expectedContentLength ?? NSURLSessionTransferSizeUnknown
+
+            progress.totalUnitCount = totalBytesExpected
+            progress.completedUnitCount = totalBytesReceived
+
+            if let progressHandler = progressHandler {
+                progressHandler.queue.async { progressHandler.closure(self.progress) }
+            }
+        }
+    }
+
+    func urlSession(
+        _ session: URLSession,
+        dataTask: URLSessionDataTask,
+        willCacheResponse proposedResponse: CachedURLResponse,
+        completionHandler: @escaping (CachedURLResponse?) -> Void) {
+        var cachedResponse: CachedURLResponse? = proposedResponse
+
+        if let dataTaskWillCacheResponse = dataTaskWillCacheResponse {
+            cachedResponse = dataTaskWillCacheResponse(session, dataTask, proposedResponse)
+        }
+
+        completionHandler(cachedResponse)
+    }
+}
+
+// MARK: -
+
+class DownloadTaskDelegate: TaskDelegate, URLSessionDownloadDelegate {
+
+    // MARK: Properties
+
+    var downloadTask: URLSessionDownloadTask { return task as! URLSessionDownloadTask }
+
+    var progress: Progress
+    var progressHandler: (closure: Request.ProgressHandler, queue: DispatchQueue)?
+
+    var resumeData: Data?
+    override var data: Data? { return resumeData }
+
+    var destination: DownloadRequest.DownloadFileDestination?
+
+    var temporaryURL: URL?
+    var destinationURL: URL?
+
+    var fileURL: URL? { return destination != nil ? destinationURL : temporaryURL }
+
+    // MARK: Lifecycle
+
+    override init(task: URLSessionTask?) {
+        progress = Progress(totalUnitCount: 0)
+        super.init(task: task)
+    }
+
+    override func reset() {
+        super.reset()
+
+        progress = Progress(totalUnitCount: 0)
+        resumeData = nil
+    }
+
+    // MARK: URLSessionDownloadDelegate
+
+    var downloadTaskDidFinishDownloadingToURL: ((URLSession, URLSessionDownloadTask, URL) -> URL)?
+    var downloadTaskDidWriteData: ((URLSession, URLSessionDownloadTask, Int64, Int64, Int64) -> Void)?
+    var downloadTaskDidResumeAtOffset: ((URLSession, URLSessionDownloadTask, Int64, Int64) -> Void)?
+
+    func urlSession(
+        _ session: URLSession,
+        downloadTask: URLSessionDownloadTask,
+        didFinishDownloadingTo location: URL) {
+        temporaryURL = location
+
+        guard
+            let destination = destination,
+            let response = downloadTask.response as? HTTPURLResponse
+        else { return }
+
+        let result = destination(location, response)
+        let destinationURL = result.destinationURL
+        let options = result.options
+
+        self.destinationURL = destinationURL
+
+        do {
+            if options.contains(.removePreviousFile), FileManager.default.fileExists(atPath: destinationURL.path) {
+                try FileManager.default.removeItem(at: destinationURL)
+            }
+
+            if options.contains(.createIntermediateDirectories) {
+                let directory = destinationURL.deletingLastPathComponent()
+                try FileManager.default.createDirectory(at: directory, withIntermediateDirectories: true)
+            }
+
+            try FileManager.default.moveItem(at: location, to: destinationURL)
+        } catch {
+            self.error = error
+        }
+    }
+
+    func urlSession(
+        _ session: URLSession,
+        downloadTask: URLSessionDownloadTask,
+        didWriteData bytesWritten: Int64,
+        totalBytesWritten: Int64,
+        totalBytesExpectedToWrite: Int64) {
+        if initialResponseTime == nil { initialResponseTime = CFAbsoluteTimeGetCurrent() }
+
+        if let downloadTaskDidWriteData = downloadTaskDidWriteData {
+            downloadTaskDidWriteData(
+                session,
+                downloadTask,
+                bytesWritten,
+                totalBytesWritten,
+                totalBytesExpectedToWrite
+            )
+        } else {
+            progress.totalUnitCount = totalBytesExpectedToWrite
+            progress.completedUnitCount = totalBytesWritten
+
+            if let progressHandler = progressHandler {
+                progressHandler.queue.async { progressHandler.closure(self.progress) }
+            }
+        }
+    }
+
+    func urlSession(
+        _ session: URLSession,
+        downloadTask: URLSessionDownloadTask,
+        didResumeAtOffset fileOffset: Int64,
+        expectedTotalBytes: Int64) {
+        if let downloadTaskDidResumeAtOffset = downloadTaskDidResumeAtOffset {
+            downloadTaskDidResumeAtOffset(session, downloadTask, fileOffset, expectedTotalBytes)
+        } else {
+            progress.totalUnitCount = expectedTotalBytes
+            progress.completedUnitCount = fileOffset
+        }
+    }
+}
+
+// MARK: -
+
+class UploadTaskDelegate: DataTaskDelegate {
+
+    // MARK: Properties
+
+    var uploadTask: URLSessionUploadTask { return task as! URLSessionUploadTask }
+
+    var uploadProgress: Progress
+    var uploadProgressHandler: (closure: Request.ProgressHandler, queue: DispatchQueue)?
+
+    // MARK: Lifecycle
+
+    override init(task: URLSessionTask?) {
+        uploadProgress = Progress(totalUnitCount: 0)
+        super.init(task: task)
+    }
+
+    override func reset() {
+        super.reset()
+        uploadProgress = Progress(totalUnitCount: 0)
+    }
+
+    // MARK: URLSessionTaskDelegate
+
+    var taskDidSendBodyData: ((URLSession, URLSessionTask, Int64, Int64, Int64) -> Void)?
+
+    func URLSession(
+        _ session: URLSession,
+        task: URLSessionTask,
+        didSendBodyData bytesSent: Int64,
+        totalBytesSent: Int64,
+        totalBytesExpectedToSend: Int64) {
+        if initialResponseTime == nil { initialResponseTime = CFAbsoluteTimeGetCurrent() }
+
+        if let taskDidSendBodyData = taskDidSendBodyData {
+            taskDidSendBodyData(session, task, bytesSent, totalBytesSent, totalBytesExpectedToSend)
+        } else {
+            uploadProgress.totalUnitCount = totalBytesExpectedToSend
+            uploadProgress.completedUnitCount = totalBytesSent
+
+            if let uploadProgressHandler = uploadProgressHandler {
+                uploadProgressHandler.queue.async { uploadProgressHandler.closure(self.uploadProgress) }
+            }
+        }
+    }
+}

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/Timeline.swift

@@ -0,0 +1,135 @@
+//
+//  Timeline.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Responsible for computing the timing metrics for the complete lifecycle of a `Request`.
+public struct Timeline {
+    /// The time the request was initialized.
+    public let requestStartTime: CFAbsoluteTime
+
+    /// The time the first bytes were received from or sent to the server.
+    public let initialResponseTime: CFAbsoluteTime
+
+    /// The time when the request was completed.
+    public let requestCompletedTime: CFAbsoluteTime
+
+    /// The time when the response serialization was completed.
+    public let serializationCompletedTime: CFAbsoluteTime
+
+    /// The time interval in seconds from the time the request started to the initial response from the server.
+    public let latency: TimeInterval
+
+    /// The time interval in seconds from the time the request started to the time the request completed.
+    public let requestDuration: TimeInterval
+
+    /// The time interval in seconds from the time the request completed to the time response serialization completed.
+    public let serializationDuration: TimeInterval
+
+    /// The time interval in seconds from the time the request started to the time response serialization completed.
+    public let totalDuration: TimeInterval
+
+    /// Creates a new `Timeline` instance with the specified request times.
+    ///
+    /// - parameter requestStartTime:           The time the request was initialized. Defaults to `0.0`.
+    /// - parameter initialResponseTime:        The time the first bytes were received from or sent to the server.
+    ///                                         Defaults to `0.0`.
+    /// - parameter requestCompletedTime:       The time when the request was completed. Defaults to `0.0`.
+    /// - parameter serializationCompletedTime: The time when the response serialization was completed. Defaults
+    ///                                         to `0.0`.
+    ///
+    /// - returns: The new `Timeline` instance.
+    public init(
+        requestStartTime: CFAbsoluteTime = 0.0,
+        initialResponseTime: CFAbsoluteTime = 0.0,
+        requestCompletedTime: CFAbsoluteTime = 0.0,
+        serializationCompletedTime: CFAbsoluteTime = 0.0) {
+        self.requestStartTime = requestStartTime
+        self.initialResponseTime = initialResponseTime
+        self.requestCompletedTime = requestCompletedTime
+        self.serializationCompletedTime = serializationCompletedTime
+
+        self.latency = initialResponseTime - requestStartTime
+        self.requestDuration = requestCompletedTime - requestStartTime
+        self.serializationDuration = serializationCompletedTime - requestCompletedTime
+        self.totalDuration = serializationCompletedTime - requestStartTime
+    }
+}
+
+// MARK: - CustomStringConvertible
+
+extension Timeline: CustomStringConvertible {
+    /// The textual representation used when written to an output stream, which includes the latency, the request
+    /// duration and the total duration.
+    public var description: String {
+        let latency = String(format: "%.3f", self.latency)
+        let requestDuration = String(format: "%.3f", self.requestDuration)
+        let serializationDuration = String(format: "%.3f", self.serializationDuration)
+        let totalDuration = String(format: "%.3f", self.totalDuration)
+
+        // NOTE: Had to move to string concatenation due to memory leak filed as rdar://26761490. Once memory leak is
+        // fixed, we should move back to string interpolation by reverting commit 7d4a43b1.
+        let timings = [
+            "\"Latency\": " + latency + " secs",
+            "\"Request Duration\": " + requestDuration + " secs",
+            "\"Serialization Duration\": " + serializationDuration + " secs",
+            "\"Total Duration\": " + totalDuration + " secs"
+        ]
+
+        return "Timeline: { " + timings.joined(separator: ", ") + " }"
+    }
+}
+
+// MARK: - CustomDebugStringConvertible
+
+extension Timeline: CustomDebugStringConvertible {
+    /// The textual representation used when written to an output stream, which includes the request start time, the
+    /// initial response time, the request completed time, the serialization completed time, the latency, the request
+    /// duration and the total duration.
+    public var debugDescription: String {
+        let requestStartTime = String(format: "%.3f", self.requestStartTime)
+        let initialResponseTime = String(format: "%.3f", self.initialResponseTime)
+        let requestCompletedTime = String(format: "%.3f", self.requestCompletedTime)
+        let serializationCompletedTime = String(format: "%.3f", self.serializationCompletedTime)
+        let latency = String(format: "%.3f", self.latency)
+        let requestDuration = String(format: "%.3f", self.requestDuration)
+        let serializationDuration = String(format: "%.3f", self.serializationDuration)
+        let totalDuration = String(format: "%.3f", self.totalDuration)
+
+        // NOTE: Had to move to string concatenation due to memory leak filed as rdar://26761490. Once memory leak is
+        // fixed, we should move back to string interpolation by reverting commit 7d4a43b1.
+        let timings = [
+            "\"Request Start Time\": " + requestStartTime,
+            "\"Initial Response Time\": " + initialResponseTime,
+            "\"Request Completed Time\": " + requestCompletedTime,
+            "\"Serialization Completed Time\": " + serializationCompletedTime,
+            "\"Latency\": " + latency + " secs",
+            "\"Request Duration\": " + requestDuration + " secs",
+            "\"Serialization Duration\": " + serializationDuration + " secs",
+            "\"Total Duration\": " + totalDuration + " secs"
+        ]
+
+        return "Timeline: { " + timings.joined(separator: ", ") + " }"
+    }
+}

samples/client/petstore/swift4/default/SwaggerClientTests/Pods/Alamofire/Source/Validation.swift

@@ -0,0 +1,319 @@
+//
+//  Validation.swift
+//
+//  Copyright (c) 2014 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+extension Request {
+
+    // MARK: Helper Types
+
+    fileprivate typealias ErrorReason = AFError.ResponseValidationFailureReason
+
+    /// Used to represent whether validation was successful or encountered an error resulting in a failure.
+    ///
+    /// - success: The validation was successful.
+    /// - failure: The validation failed encountering the provided error.
+    public enum ValidationResult {
+        case success
+        case failure(Error)
+    }
+
+    fileprivate struct MIMEType {
+        let type: String
+        let subtype: String
+
+        var isWildcard: Bool { return type == "*" && subtype == "*" }
+
+        init?(_ string: String) {
+            let components: [String] = {
+                let stripped = string.trimmingCharacters(in: .whitespacesAndNewlines)
+
+            #if swift(>=3.2)
+                let split = stripped[..<(stripped.range(of: ";")?.lowerBound ?? stripped.endIndex)]
+            #else
+                let split = stripped.substring(to: stripped.range(of: ";")?.lowerBound ?? stripped.endIndex)
+            #endif
+
+                return split.components(separatedBy: "/")
+            }()
+
+            if let type = components.first, let subtype = components.last {
+                self.type = type
+                self.subtype = subtype
+            } else {
+                return nil
+            }
+        }
+
+        func matches(_ mime: MIMEType) -> Bool {
+            switch (type, subtype) {
+            case (mime.type, mime.subtype), (mime.type, "*"), ("*", mime.subtype), ("*", "*"):
+                return true
+            default:
+                return false
+            }
+        }
+    }
+
+    // MARK: Properties
+
+    fileprivate var acceptableStatusCodes: [Int] { return Array(200..<300) }
+
+    fileprivate var acceptableContentTypes: [String] {
+        if let accept = request?.value(forHTTPHeaderField: "Accept") {
+            return accept.components(separatedBy: ",")
+        }
+
+        return ["*/*"]
+    }
+
+    // MARK: Status Code
+
+    fileprivate func validate<S: Sequence>(
+        statusCode acceptableStatusCodes: S,
+        response: HTTPURLResponse)
+        -> ValidationResult
+        where S.Iterator.Element == Int {
+        if acceptableStatusCodes.contains(response.statusCode) {
+            return .success
+        } else {
+            let reason: ErrorReason = .unacceptableStatusCode(code: response.statusCode)
+            return .failure(AFError.responseValidationFailed(reason: reason))
+        }
+    }
+
+    // MARK: Content Type
+
+    fileprivate func validate<S: Sequence>(
+        contentType acceptableContentTypes: S,
+        response: HTTPURLResponse,
+        data: Data?)
+        -> ValidationResult
+        where S.Iterator.Element == String {
+        guard let data = data, data.count > 0 else { return .success }
+
+        guard
+            let responseContentType = response.mimeType,
+            let responseMIMEType = MIMEType(responseContentType)
+        else {
+            for contentType in acceptableContentTypes {
+                if let mimeType = MIMEType(contentType), mimeType.isWildcard {
+                    return .success
+                }
+            }
+
+            let error: AFError = {
+                let reason: ErrorReason = .missingContentType(acceptableContentTypes: Array(acceptableContentTypes))
+                return AFError.responseValidationFailed(reason: reason)
+            }()
+
+            return .failure(error)
+        }
+
+        for contentType in acceptableContentTypes {
+            if let acceptableMIMEType = MIMEType(contentType), acceptableMIMEType.matches(responseMIMEType) {
+                return .success
+            }
+        }
+
+        let error: AFError = {
+            let reason: ErrorReason = .unacceptableContentType(
+                acceptableContentTypes: Array(acceptableContentTypes),
+                responseContentType: responseContentType
+            )
+
+            return AFError.responseValidationFailed(reason: reason)
+        }()
+
+        return .failure(error)
+    }
+}
+
+// MARK: -
+
+extension DataRequest {
+    /// A closure used to validate a request that takes a URL request, a URL response and data, and returns whether the
+    /// request was valid.
+    public typealias Validation = (URLRequest?, HTTPURLResponse, Data?) -> ValidationResult
+
+    /// Validates the request, using the specified closure.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter validation: A closure to validate the request.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate(_ validation: @escaping Validation) -> Self {
+        let validationExecution: () -> Void = { [unowned self] in
+            if
+                let response = self.response,
+                self.delegate.error == nil,
+                case let .failure(error) = validation(self.request, response, self.delegate.data)
+            {
+                self.delegate.error = error
+            }
+        }
+
+        validations.append(validationExecution)
+
+        return self
+    }
+
+    /// Validates that the response has a status code in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter range: The range of acceptable status codes.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate<S: Sequence>(statusCode acceptableStatusCodes: S) -> Self where S.Iterator.Element == Int {
+        return validate { [unowned self] _, response, _ in
+            return self.validate(statusCode: acceptableStatusCodes, response: response)
+        }
+    }
+
+    /// Validates that the response has a content type in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter contentType: The acceptable content types, which may specify wildcard types and/or subtypes.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate<S: Sequence>(contentType acceptableContentTypes: S) -> Self where S.Iterator.Element == String {
+        return validate { [unowned self] _, response, data in
+            return self.validate(contentType: acceptableContentTypes, response: response, data: data)
+        }
+    }
+
+    /// Validates that the response has a status code in the default acceptable range of 200...299, and that the content
+    /// type matches any specified in the Accept HTTP header field.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate() -> Self {
+        let contentTypes = { [unowned self] in
+            self.acceptableContentTypes
+        }
+        return validate(statusCode: acceptableStatusCodes).validate(contentType: contentTypes())
+    }
+}
+
+// MARK: -
+
+extension DownloadRequest {
+    /// A closure used to validate a request that takes a URL request, a URL response, a temporary URL and a
+    /// destination URL, and returns whether the request was valid.
+    public typealias Validation = (
+        _ request: URLRequest?,
+        _ response: HTTPURLResponse,
+        _ temporaryURL: URL?,
+        _ destinationURL: URL?)
+        -> ValidationResult
+
+    /// Validates the request, using the specified closure.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter validation: A closure to validate the request.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate(_ validation: @escaping Validation) -> Self {
+        let validationExecution: () -> Void = { [unowned self] in
+            let request = self.request
+            let temporaryURL = self.downloadDelegate.temporaryURL
+            let destinationURL = self.downloadDelegate.destinationURL
+
+            if
+                let response = self.response,
+                self.delegate.error == nil,
+                case let .failure(error) = validation(request, response, temporaryURL, destinationURL)
+            {
+                self.delegate.error = error
+            }
+        }
+
+        validations.append(validationExecution)
+
+        return self
+    }
+
+    /// Validates that the response has a status code in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter range: The range of acceptable status codes.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate<S: Sequence>(statusCode acceptableStatusCodes: S) -> Self where S.Iterator.Element == Int {
+        return validate { [unowned self] _, response, _, _ in
+            return self.validate(statusCode: acceptableStatusCodes, response: response)
+        }
+    }
+
+    /// Validates that the response has a content type in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter contentType: The acceptable content types, which may specify wildcard types and/or subtypes.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate<S: Sequence>(contentType acceptableContentTypes: S) -> Self where S.Iterator.Element == String {
+        return validate { [unowned self] _, response, _, _ in
+            let fileURL = self.downloadDelegate.fileURL
+
+            guard let validFileURL = fileURL else {
+                return .failure(AFError.responseValidationFailed(reason: .dataFileNil))
+            }
+
+            do {
+                let data = try Data(contentsOf: validFileURL)
+                return self.validate(contentType: acceptableContentTypes, response: response, data: data)
+            } catch {
+                return .failure(AFError.responseValidationFailed(reason: .dataFileReadFailed(at: validFileURL)))
+            }
+        }
+    }
+
+    /// Validates that the response has a status code in the default acceptable range of 200...299, and that the content
+    /// type matches any specified in the Accept HTTP header field.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate() -> Self {
+        let contentTypes = { [unowned self] in
+            self.acceptableContentTypes
+        }
+        return validate(statusCode: acceptableStatusCodes).validate(contentType: contentTypes())
+    }
+}

samples/client/petstore/swift4/default/SwaggerClientTests/SwaggerClientTests/DateFormatTests.swift

@@ -76,6 +76,8 @@ class DateFormatTests: XCTestCase {
 	}
 
 	func testCodableAlwaysResultsInUTCEncodedDate() {
+        CodableHelper.jsonEncoder.outputFormatting.remove(.prettyPrinted)
+
         let jsonData = "{\"date\":\"1970-01-01T00:00:00.000Z\"}".data(using: .utf8)!
 		let decodeResult = CodableHelper.decode(DateTest.self, from: jsonData)
 		XCTAssert(decodeResult.decodableObj != nil && decodeResult.error == nil)

samples/client/petstore/swift4/nonPublicApi/.openapi-generator/VERSION

@@ -1 +1 @@
-4.2.2-SNAPSHOT
+4.2.3-SNAPSHOT

samples/client/petstore/swift4/nonPublicApi/Package.swift

@@ -9,11 +9,11 @@ let package = Package(
         // Products define the executables and libraries produced by a package, and make them visible to other packages.
         .library(
             name: "PetstoreClient",
-            targets: ["PetstoreClient"])
+            targets: ["PetstoreClient"]),
     ],
     dependencies: [
         // Dependencies declare other packages that this package depends on.
-        .package(url: "https://github.com/Alamofire/Alamofire.git", from: "4.9.0")
+        .package(url: "https://github.com/Alamofire/Alamofire.git", from: "4.9.0"),
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
@@ -22,6 +22,6 @@ let package = Package(
             name: "PetstoreClient",
             dependencies: ["Alamofire"],
             path: "PetstoreClient/Classes"
-        )
+        ),
     ]
 )

samples/client/petstore/swift4/nonPublicApi/PetstoreClient/Classes/OpenAPIs/APIHelper.swift

@@ -22,7 +22,7 @@ internal struct APIHelper {
 
     internal static func rejectNilHeaders(_ source: [String:Any?]) -> [String:String] {
         return source.reduce(into: [String: String]()) { (result, item) in
-            if let collection = item.value as? [Any?] {
+            if let collection = item.value as? Array<Any?> {
                 result[item.key] = collection.filter({ $0 != nil }).map{ "\($0!)" }.joined(separator: ",")
             } else if let value: Any = item.value {
                 result[item.key] = "\(value)"
@@ -46,7 +46,7 @@ internal struct APIHelper {
     }
 
     internal static func mapValueToPathItem(_ source: Any) -> Any {
-        if let collection = source as? [Any?] {
+        if let collection = source as? Array<Any?> {
             return collection.filter({ $0 != nil }).map({"\($0!)"}).joined(separator: ",")
         }
         return source
@@ -54,7 +54,7 @@ internal struct APIHelper {
 
     internal static func mapValuesToQueryItems(_ source: [String:Any?]) -> [URLQueryItem]? {
         let destination = source.filter({ $0.value != nil}).reduce(into: [URLQueryItem]()) { (result, item) in
-            if let collection = item.value as? [Any?] {
+            if let collection = item.value as? Array<Any?> {
                 let value = collection.filter({ $0 != nil }).map({"\($0!)"}).joined(separator: ",")
                 result.append(URLQueryItem(name: item.key, value: value))
             } else if let value = item.value {
@@ -68,3 +68,4 @@ internal struct APIHelper {
         return destination
     }
 }
+

samples/client/petstore/swift4/nonPublicApi/PetstoreClient/Classes/OpenAPIs/APIs.swift

@@ -11,6 +11,7 @@ internal class PetstoreClientAPI {
     internal static var credential: URLCredential?
     internal static var customHeaders: [String:String] = [:]
     internal static var requestBuilderFactory: RequestBuilderFactory = AlamofireRequestBuilderFactory()
+    internal static var apiResponseQueue: DispatchQueue = .main
 }
 
 internal class RequestBuilder<T> {
@@ -22,7 +23,7 @@ internal class RequestBuilder<T> {
     internal let URLString: String
 
     /// Optional block to obtain a reference to the request's progress instance when available.
-    internal var onProgressReady: ((Progress) -> Void)?
+    internal var onProgressReady: ((Progress) -> ())?
 
     required internal init(method: String, URLString: String, parameters: [String:Any]?, isBody: Bool, headers: [String:String] = [:]) {
         self.method = method

samples/client/petstore/swift4/nonPublicApi/PetstoreClient/Classes/OpenAPIs/APIs/AnotherFakeAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 internal class AnotherFakeAPI {
     /**
      To test special tags

samples/client/petstore/swift4/nonPublicApi/PetstoreClient/Classes/OpenAPIs/APIs/FakeAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 internal class FakeAPI {
     /**
 
@@ -130,7 +132,7 @@ internal class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func testBodyWithFileSchema(body: FileSchemaTestClass, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testBodyWithFileSchemaWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        testBodyWithFileSchemaWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -164,7 +166,7 @@ internal class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func testBodyWithQueryParams(query: String, body: User, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testBodyWithQueryParamsWithRequestBuilder(query: query, body: body).execute { (_, error) -> Void in
+        testBodyWithQueryParamsWithRequestBuilder(query: query, body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -186,7 +188,7 @@ internal class FakeAPI {
 
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "query": query
+            "query": query.encodeToJSON()
         ])
 
         let requestBuilder: RequestBuilder<Void>.Type = PetstoreClientAPI.requestBuilderFactory.getNonDecodableBuilder()
@@ -245,7 +247,7 @@ internal class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func testEndpointParameters(number: Double, double: Double, patternWithoutDelimiter: String, byte: Data, integer: Int? = nil, int32: Int? = nil, int64: Int64? = nil, float: Float? = nil, string: String? = nil, binary: URL? = nil, date: Date? = nil, dateTime: Date? = nil, password: String? = nil, callback: String? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testEndpointParametersWithRequestBuilder(number: number, double: double, patternWithoutDelimiter: patternWithoutDelimiter, byte: byte, integer: integer, int32: int32, int64: int64, float: float, string: string, binary: binary, date: date, dateTime: dateTime, password: password, callback: callback).execute { (_, error) -> Void in
+        testEndpointParametersWithRequestBuilder(number: number, double: double, patternWithoutDelimiter: patternWithoutDelimiter, byte: byte, integer: integer, int32: int32, int64: int64, float: float, string: string, binary: binary, date: date, dateTime: dateTime, password: password, callback: callback).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -284,17 +286,17 @@ internal class FakeAPI {
             "integer": integer?.encodeToJSON(),
             "int32": int32?.encodeToJSON(),
             "int64": int64?.encodeToJSON(),
-            "number": number,
-            "float": float,
-            "double": double,
-            "string": string,
-            "pattern_without_delimiter": patternWithoutDelimiter,
-            "byte": byte,
-            "binary": binary,
+            "number": number.encodeToJSON(),
+            "float": float?.encodeToJSON(),
+            "double": double.encodeToJSON(),
+            "string": string?.encodeToJSON(),
+            "pattern_without_delimiter": patternWithoutDelimiter.encodeToJSON(),
+            "byte": byte.encodeToJSON(),
+            "binary": binary?.encodeToJSON(),
             "date": date?.encodeToJSON(),
             "dateTime": dateTime?.encodeToJSON(),
-            "password": password,
-            "callback": callback
+            "password": password?.encodeToJSON(),
+            "callback": callback?.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)
@@ -388,7 +390,7 @@ internal class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func testEnumParameters(enumHeaderStringArray: [String]? = nil, enumHeaderString: EnumHeaderString_testEnumParameters? = nil, enumQueryStringArray: [String]? = nil, enumQueryString: EnumQueryString_testEnumParameters? = nil, enumQueryInteger: EnumQueryInteger_testEnumParameters? = nil, enumQueryDouble: EnumQueryDouble_testEnumParameters? = nil, enumFormStringArray: [String]? = nil, enumFormString: EnumFormString_testEnumParameters? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testEnumParametersWithRequestBuilder(enumHeaderStringArray: enumHeaderStringArray, enumHeaderString: enumHeaderString, enumQueryStringArray: enumQueryStringArray, enumQueryString: enumQueryString, enumQueryInteger: enumQueryInteger, enumQueryDouble: enumQueryDouble, enumFormStringArray: enumFormStringArray, enumFormString: enumFormString).execute { (_, error) -> Void in
+        testEnumParametersWithRequestBuilder(enumHeaderStringArray: enumHeaderStringArray, enumHeaderString: enumHeaderString, enumQueryStringArray: enumQueryStringArray, enumQueryString: enumQueryString, enumQueryInteger: enumQueryInteger, enumQueryDouble: enumQueryDouble, enumFormStringArray: enumFormStringArray, enumFormString: enumFormString).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -415,8 +417,8 @@ internal class FakeAPI {
         let path = "/fake"
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String:Any?] = [
-            "enum_form_string_array": enumFormStringArray,
-            "enum_form_string": enumFormString?.rawValue
+            "enum_form_string_array": enumFormStringArray?.encodeToJSON(),
+            "enum_form_string": enumFormString?.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)
@@ -424,14 +426,14 @@ internal class FakeAPI {
         
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "enum_query_string_array": enumQueryStringArray,
-            "enum_query_string": enumQueryString?.rawValue,
-            "enum_query_integer": enumQueryInteger?.rawValue,
-            "enum_query_double": enumQueryDouble?.rawValue
+            "enum_query_string_array": enumQueryStringArray?.encodeToJSON(), 
+            "enum_query_string": enumQueryString?.encodeToJSON(), 
+            "enum_query_integer": enumQueryInteger?.encodeToJSON(), 
+            "enum_query_double": enumQueryDouble?.encodeToJSON()
         ])
         let nillableHeaders: [String: Any?] = [
-            "enum_header_string_array": enumHeaderStringArray,
-            "enum_header_string": enumHeaderString?.rawValue
+            "enum_header_string_array": enumHeaderStringArray?.encodeToJSON(),
+            "enum_header_string": enumHeaderString?.encodeToJSON()
         ]
         let headerParameters = APIHelper.rejectNilHeaders(nillableHeaders)
 
@@ -452,7 +454,7 @@ internal class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func testGroupParameters(requiredStringGroup: Int, requiredBooleanGroup: Bool, requiredInt64Group: Int64, stringGroup: Int? = nil, booleanGroup: Bool? = nil, int64Group: Int64? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testGroupParametersWithRequestBuilder(requiredStringGroup: requiredStringGroup, requiredBooleanGroup: requiredBooleanGroup, requiredInt64Group: requiredInt64Group, stringGroup: stringGroup, booleanGroup: booleanGroup, int64Group: int64Group).execute { (_, error) -> Void in
+        testGroupParametersWithRequestBuilder(requiredStringGroup: requiredStringGroup, requiredBooleanGroup: requiredBooleanGroup, requiredInt64Group: requiredInt64Group, stringGroup: stringGroup, booleanGroup: booleanGroup, int64Group: int64Group).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -486,8 +488,8 @@ internal class FakeAPI {
             "int64_group": int64Group?.encodeToJSON()
         ])
         let nillableHeaders: [String: Any?] = [
-            "required_boolean_group": requiredBooleanGroup,
-            "boolean_group": booleanGroup
+            "required_boolean_group": requiredBooleanGroup.encodeToJSON(),
+            "boolean_group": booleanGroup?.encodeToJSON()
         ]
         let headerParameters = APIHelper.rejectNilHeaders(nillableHeaders)
 
@@ -503,7 +505,7 @@ internal class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func testInlineAdditionalProperties(param: [String:String], completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testInlineAdditionalPropertiesWithRequestBuilder(param: param).execute { (_, error) -> Void in
+        testInlineAdditionalPropertiesWithRequestBuilder(param: param).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -538,7 +540,7 @@ internal class FakeAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func testJsonFormData(param: String, param2: String, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        testJsonFormDataWithRequestBuilder(param: param, param2: param2).execute { (_, error) -> Void in
+        testJsonFormDataWithRequestBuilder(param: param, param2: param2).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -558,8 +560,8 @@ internal class FakeAPI {
         let path = "/fake/jsonFormData"
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String:Any?] = [
-            "param": param,
-            "param2": param2
+            "param": param.encodeToJSON(),
+            "param2": param2.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)

samples/client/petstore/swift4/nonPublicApi/PetstoreClient/Classes/OpenAPIs/APIs/FakeClassnameTags123API.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 internal class FakeClassnameTags123API {
     /**
      To test class name in snake case

samples/client/petstore/swift4/nonPublicApi/PetstoreClient/Classes/OpenAPIs/APIs/PetAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 internal class PetAPI {
     /**
      Add a new pet to the store
@@ -15,7 +17,7 @@ internal class PetAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func addPet(body: Pet, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        addPetWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        addPetWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -53,7 +55,7 @@ internal class PetAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func deletePet(petId: Int64, apiKey: String? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        deletePetWithRequestBuilder(petId: petId, apiKey: apiKey).execute { (_, error) -> Void in
+        deletePetWithRequestBuilder(petId: petId, apiKey: apiKey).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -82,7 +84,7 @@ internal class PetAPI {
         
         let url = URLComponents(string: URLString)
         let nillableHeaders: [String: Any?] = [
-            "api_key": apiKey
+            "api_key": apiKey?.encodeToJSON()
         ]
         let headerParameters = APIHelper.rejectNilHeaders(nillableHeaders)
 
@@ -129,7 +131,7 @@ internal class PetAPI {
         
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "status": status
+            "status": status.encodeToJSON()
         ])
 
         let requestBuilder: RequestBuilder<[Pet]>.Type = PetstoreClientAPI.requestBuilderFactory.getBuilder()
@@ -166,7 +168,7 @@ internal class PetAPI {
         
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "tags": tags
+            "tags": tags.encodeToJSON()
         ])
 
         let requestBuilder: RequestBuilder<[Pet]>.Type = PetstoreClientAPI.requestBuilderFactory.getBuilder()
@@ -218,7 +220,7 @@ internal class PetAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func updatePet(body: Pet, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        updatePetWithRequestBuilder(body: body).execute { (_, error) -> Void in
+        updatePetWithRequestBuilder(body: body).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -257,7 +259,7 @@ internal class PetAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func updatePetWithForm(petId: Int64, name: String? = nil, status: String? = nil, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        updatePetWithFormWithRequestBuilder(petId: petId, name: name, status: status).execute { (_, error) -> Void in
+        updatePetWithFormWithRequestBuilder(petId: petId, name: name, status: status).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {
@@ -284,8 +286,8 @@ internal class PetAPI {
         path = path.replacingOccurrences(of: "{petId}", with: petIdPostEscape, options: .literal, range: nil)
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String:Any?] = [
-            "name": name,
-            "status": status
+            "name": name?.encodeToJSON(),
+            "status": status?.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)
@@ -330,8 +332,8 @@ internal class PetAPI {
         path = path.replacingOccurrences(of: "{petId}", with: petIdPostEscape, options: .literal, range: nil)
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String:Any?] = [
-            "additionalMetadata": additionalMetadata,
-            "file": file
+            "additionalMetadata": additionalMetadata?.encodeToJSON(),
+            "file": file?.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)
@@ -376,8 +378,8 @@ internal class PetAPI {
         path = path.replacingOccurrences(of: "{petId}", with: petIdPostEscape, options: .literal, range: nil)
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String:Any?] = [
-            "additionalMetadata": additionalMetadata,
-            "requiredFile": requiredFile
+            "additionalMetadata": additionalMetadata?.encodeToJSON(),
+            "requiredFile": requiredFile.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)

samples/client/petstore/swift4/nonPublicApi/PetstoreClient/Classes/OpenAPIs/APIs/StoreAPI.swift

@@ -7,6 +7,8 @@
 
 import Foundation
 
+
+
 internal class StoreAPI {
     /**
      Delete purchase order by ID
@@ -15,7 +17,7 @@ internal class StoreAPI {
      - parameter completion: completion handler to receive the data and the error objects
      */
     internal class func deleteOrder(orderId: String, completion: @escaping ((_ data: Void?,_ error: Error?) -> Void)) {
-        deleteOrderWithRequestBuilder(orderId: orderId).execute { (_, error) -> Void in
+        deleteOrderWithRequestBuilder(orderId: orderId).execute { (response, error) -> Void in
             if error == nil {
                 completion((), error)
             } else {