Added support for a trait based reqwest Rust client (#19788)

* Added Rust Reqwest trait based client

* Fixed Cargo imports for reqwest trait template

* Added support for mockall to Rust reqwest trait library

* Added MockApiClient when mockall and topLevelClient are enabled

* Added missing flags to Rust generator documentation

* feat: add support for single argument and bon builder

Adds support for single argument and bon building for the new
reqwest-trait generator

* Rebuilt rust samples

---------

Co-authored-by: Troy Benson <troybensonsa@gmail.com>

bin/configs/rust-reqwest-trait-petstore.yaml

@@ -0,0 +1,11 @@
+generatorName: rust
+outputDir: samples/client/petstore/rust/reqwest-trait/petstore
+library: reqwest-trait
+inputSpec: modules/openapi-generator/src/test/resources/3_0/rust/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/rust
+additionalProperties:
+  topLevelApiClient: true
+  packageName: petstore-reqwest
+  mockall: true
+enumNameMappings:
+  delivered: shipped

docs/generators/rust.md

@@ -22,14 +22,17 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |bestFitInt|Use best fitting integer type where minimum or maximum is set| |false|
 |enumNameSuffix|Suffix that will be appended to all enum names.| ||
 |hideGenerationTimestamp|Hides the generation timestamp when files are generated.| |true|
-|library|library template (sub-template) to use.|<dl><dt>**hyper**</dt><dd>HTTP client: Hyper (v1.x).</dd><dt>**hyper0x**</dt><dd>HTTP client: Hyper (v0.x).</dd><dt>**reqwest**</dt><dd>HTTP client: Reqwest.</dd></dl>|reqwest|
+|library|library template (sub-template) to use.|<dl><dt>**hyper**</dt><dd>HTTP client: Hyper (v1.x).</dd><dt>**hyper0x**</dt><dd>HTTP client: Hyper (v0.x).</dd><dt>**reqwest**</dt><dd>HTTP client: Reqwest.</dd><dt>**reqwest-trait**</dt><dd>HTTP client: Reqwest (trait based).</dd></dl>|reqwest|
+|mockall|Adds `#[automock]` from the mockall crate to api traits. This option is for 'reqwest-trait' library only| |false|
 |packageName|Rust package name (convention: lowercase).| |openapi|
 |packageVersion|Rust package version.| |1.0.0|
 |preferUnsignedInt|Prefer unsigned integers where minimum value is &gt;= 0| |false|
 |supportAsync|If set, generate async function call instead. This option is for 'reqwest' library only| |true|
-|supportMiddleware|If set, add support for reqwest-middleware. This option is for 'reqwest' library only| |false|
+|supportMiddleware|If set, add support for reqwest-middleware. This option is for 'reqwest' and 'reqwest-trait' library only| |false|
-|supportMultipleResponses|If set, return type wraps an enum of all possible 2xx schemas. This option is for 'reqwest' library only| |false|
+|supportMultipleResponses|If set, return type wraps an enum of all possible 2xx schemas. This option is for 'reqwest' and 'reqwest-trait' library only| |false|
-|supportTokenSource|If set, add support for google-cloud-token. This option is for 'reqwest' library only and requires the 'supportAsync' option| |false|
+|supportTokenSource|If set, add support for google-cloud-token. This option is for 'reqwest' and 'reqwest-trait' library only and requires the 'supportAsync' option| |false|
+|topLevelApiClient|Creates a top level `Api` trait and `ApiClient` struct that contain all Apis. This option is for 'reqwest-trait' library only| |false|
+|useBonBuilder|Use the bon crate for building parameter types. This option is for the 'reqwest-trait' library only| |false|
 |useSingleRequestParameter|Setting this property to true will generate functions with a single argument containing all API endpoint parameters instead of one argument per parameter.| |false|
 |withAWSV4Signature|whether to include AWS v4 signature support| |false|
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java

@@ -17,15 +17,37 @@
 
 package org.openapitools.codegen.languages;
 
-import com.samskivert.mustache.Mustache;
+import java.io.File;
-import com.samskivert.mustache.Template;
+import java.io.IOException;
-import io.swagger.v3.oas.models.media.*;
+import java.io.Writer;
-import io.swagger.v3.parser.util.SchemaTypeUtil;
+import java.math.BigDecimal;
-import joptsimple.internal.Strings;
+import java.math.BigInteger;
-import lombok.AccessLevel;
+import java.util.Arrays;
-import lombok.Setter;
+import java.util.Collections;
-import org.openapitools.codegen.*;
+import java.util.EnumSet;
-import org.openapitools.codegen.meta.features.*;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+import org.openapitools.codegen.CliOption;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenConstants;
+import org.openapitools.codegen.CodegenModel;
+import org.openapitools.codegen.CodegenOperation;
+import org.openapitools.codegen.CodegenProperty;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.SupportingFile;
+import org.openapitools.codegen.meta.features.ClientModificationFeature;
+import org.openapitools.codegen.meta.features.DocumentationFeature;
+import org.openapitools.codegen.meta.features.GlobalFeature;
+import org.openapitools.codegen.meta.features.ParameterFeature;
+import org.openapitools.codegen.meta.features.SchemaSupportFeature;
+import org.openapitools.codegen.meta.features.SecurityFeature;
+import org.openapitools.codegen.meta.features.WireFormatFeature;
 import org.openapitools.codegen.model.ModelMap;
 import org.openapitools.codegen.model.ModelsMap;
 import org.openapitools.codegen.model.OperationMap;
@@ -35,13 +57,15 @@ import org.openapitools.codegen.utils.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.File;
+import com.samskivert.mustache.Mustache;
-import java.io.IOException;
+import com.samskivert.mustache.Template;
-import java.io.Writer;
+
-import java.math.BigDecimal;
+import io.swagger.v3.oas.models.media.Discriminator;
-import java.math.BigInteger;
+import io.swagger.v3.oas.models.media.Schema;
-import java.util.*;
+import io.swagger.v3.parser.util.SchemaTypeUtil;
-import java.util.stream.Collectors;
+import joptsimple.internal.Strings;
+import lombok.AccessLevel;
+import lombok.Setter;
 
 public class RustClientCodegen extends AbstractRustCodegen implements CodegenConfig {
     private final Logger LOGGER = LoggerFactory.getLogger(RustClientCodegen.class);
@@ -61,6 +85,8 @@ public class RustClientCodegen extends AbstractRustCodegen implements CodegenCon
     public static final String HYPER_LIBRARY = "hyper";
     public static final String HYPER0X_LIBRARY = "hyper0x";
     public static final String REQWEST_LIBRARY = "reqwest";
+    public static final String REQWEST_TRAIT_LIBRARY = "reqwest-trait";
+    public static final String REQWEST_TRAIT_LIBRARY_ATTR = "reqwestTrait";
     public static final String SUPPORT_ASYNC = "supportAsync";
     public static final String SUPPORT_MIDDLEWARE = "supportMiddleware";
     public static final String SUPPORT_TOKEN_SOURCE = "supportTokenSource";
@@ -68,6 +94,9 @@ public class RustClientCodegen extends AbstractRustCodegen implements CodegenCon
     public static final String PREFER_UNSIGNED_INT = "preferUnsignedInt";
     public static final String BEST_FIT_INT = "bestFitInt";
     public static final String AVOID_BOXED_MODELS = "avoidBoxedModels";
+    public static final String TOP_LEVEL_API_CLIENT = "topLevelApiClient";
+    public static final String MOCKALL = "mockall";
+    public static final String BON_BUILDER = "useBonBuilder";
 
     @Setter protected String packageName = "openapi";
     @Setter protected String packageVersion = "1.0.0";
@@ -192,11 +221,11 @@ public class RustClientCodegen extends AbstractRustCodegen implements CodegenCon
                 .defaultValue(Boolean.FALSE.toString()));
         cliOptions.add(new CliOption(SUPPORT_ASYNC, "If set, generate async function call instead. This option is for 'reqwest' library only", SchemaTypeUtil.BOOLEAN_TYPE)
                 .defaultValue(Boolean.TRUE.toString()));
-        cliOptions.add(new CliOption(SUPPORT_MIDDLEWARE, "If set, add support for reqwest-middleware. This option is for 'reqwest' library only", SchemaTypeUtil.BOOLEAN_TYPE)
+        cliOptions.add(new CliOption(SUPPORT_MIDDLEWARE, "If set, add support for reqwest-middleware. This option is for 'reqwest' and 'reqwest-trait' library only", SchemaTypeUtil.BOOLEAN_TYPE)
                 .defaultValue(Boolean.FALSE.toString()));
-        cliOptions.add(new CliOption(SUPPORT_TOKEN_SOURCE, "If set, add support for google-cloud-token. This option is for 'reqwest' library only and requires the 'supportAsync' option", SchemaTypeUtil.BOOLEAN_TYPE)
+        cliOptions.add(new CliOption(SUPPORT_TOKEN_SOURCE, "If set, add support for google-cloud-token. This option is for 'reqwest' and 'reqwest-trait' library only and requires the 'supportAsync' option", SchemaTypeUtil.BOOLEAN_TYPE)
                 .defaultValue(Boolean.FALSE.toString()));
-        cliOptions.add(new CliOption(SUPPORT_MULTIPLE_RESPONSES, "If set, return type wraps an enum of all possible 2xx schemas. This option is for 'reqwest' library only", SchemaTypeUtil.BOOLEAN_TYPE)
+        cliOptions.add(new CliOption(SUPPORT_MULTIPLE_RESPONSES, "If set, return type wraps an enum of all possible 2xx schemas. This option is for 'reqwest' and 'reqwest-trait' library only", SchemaTypeUtil.BOOLEAN_TYPE)
                 .defaultValue(Boolean.FALSE.toString()));
         cliOptions.add(new CliOption(CodegenConstants.ENUM_NAME_SUFFIX, CodegenConstants.ENUM_NAME_SUFFIX_DESC).defaultValue(this.enumSuffix));
         cliOptions.add(new CliOption(CodegenConstants.WITH_AWSV4_SIGNATURE_COMMENT, CodegenConstants.WITH_AWSV4_SIGNATURE_COMMENT_DESC, SchemaTypeUtil.BOOLEAN_TYPE)
@@ -207,10 +236,17 @@ public class RustClientCodegen extends AbstractRustCodegen implements CodegenCon
                 .defaultValue(Boolean.FALSE.toString()));
         cliOptions.add(new CliOption(AVOID_BOXED_MODELS, "If set, `Box<T>` will not be used for models", SchemaTypeUtil.BOOLEAN_TYPE)
                 .defaultValue(Boolean.FALSE.toString()));
+        cliOptions.add(new CliOption(MOCKALL, "Adds `#[automock]` from the mockall crate to api traits. This option is for 'reqwest-trait' library only", SchemaTypeUtil.BOOLEAN_TYPE)
+                .defaultValue(Boolean.FALSE.toString()));
+        cliOptions.add(new CliOption(TOP_LEVEL_API_CLIENT, "Creates a top level `Api` trait and `ApiClient` struct that contain all Apis. This option is for 'reqwest-trait' library only", SchemaTypeUtil.BOOLEAN_TYPE)
+                .defaultValue(Boolean.FALSE.toString()));
+        cliOptions.add(new CliOption(BON_BUILDER, "Use the bon crate for building parameter types. This option is for the 'reqwest-trait' library only", SchemaTypeUtil.BOOLEAN_TYPE)
+                .defaultValue(Boolean.FALSE.toString()));
 
         supportedLibraries.put(HYPER_LIBRARY, "HTTP client: Hyper (v1.x).");
         supportedLibraries.put(HYPER0X_LIBRARY, "HTTP client: Hyper (v0.x).");
         supportedLibraries.put(REQWEST_LIBRARY, "HTTP client: Reqwest.");
+        supportedLibraries.put(REQWEST_TRAIT_LIBRARY, "HTTP client: Reqwest (trait based).");
 
         CliOption libraryOption = new CliOption(CodegenConstants.LIBRARY, "library template (sub-template) to use.");
         libraryOption.setEnum(supportedLibraries);
@@ -389,6 +425,8 @@ public class RustClientCodegen extends AbstractRustCodegen implements CodegenCon
             additionalProperties.put(HYPER0X_LIBRARY, "true");
         } else if (REQWEST_LIBRARY.equals(getLibrary())) {
             additionalProperties.put(REQWEST_LIBRARY, "true");
+        } else if (REQWEST_TRAIT_LIBRARY.equals(getLibrary())) {
+            additionalProperties.put(REQWEST_TRAIT_LIBRARY_ATTR, "true");
         } else {
             LOGGER.error("Unknown library option (-l/--library): {}", getLibrary());
         }
@@ -449,7 +487,7 @@ public class RustClientCodegen extends AbstractRustCodegen implements CodegenCon
     private boolean getSupportMiddleware() {
         return supportMiddleware;
     }
-    
+
     private boolean getSupportTokenSource() {
         return supportTokenSource;
     }
@@ -569,7 +607,7 @@ public class RustClientCodegen extends AbstractRustCodegen implements CodegenCon
             // http method verb conversion, depending on client library (e.g. Hyper: PUT => Put, Reqwest: PUT => put)
             if (HYPER_LIBRARY.equals(getLibrary())) {
                 operation.httpMethod = StringUtils.camelize(operation.httpMethod.toLowerCase(Locale.ROOT));
-            } else if (REQWEST_LIBRARY.equals(getLibrary())) {
+            } else if (REQWEST_LIBRARY.equals(getLibrary()) || REQWEST_TRAIT_LIBRARY.equals(getLibrary())) {
                 operation.httpMethod = operation.httpMethod.toUpperCase(Locale.ROOT);
             }
 

modules/openapi-generator/src/main/resources/rust/Cargo.mustache

@@ -78,3 +78,27 @@ google-cloud-token = "^0.1"
 {{/supportTokenSource}}
 {{/supportAsync}}
 {{/reqwest}}
+{{#reqwestTrait}}
+async-trait = "^0.1"
+reqwest = { version = "^0.12", features = ["json", "multipart"] }
+{{#supportMiddleware}}
+reqwest-middleware = { version = "^0.3", features = ["json", "multipart"] }
+{{/supportMiddleware}}
+{{#supportTokenSource}}
+# TODO: propose to Yoshidan to externalize this as non google related crate, so that it can easily be extended for other cloud providers.
+google-cloud-token = "^0.1"
+{{/supportTokenSource}}
+{{#mockall}}
+mockall = { version = "^0.13", optional = true}
+{{/mockall}}
+{{#useBonBuilder}}
+bon = { version = "2.3", optional = true }
+{{/useBonBuilder}}
+[features]
+{{#mockall}}
+mockall = ["dep:mockall"]
+{{/mockall}}
+{{#useBonBuilder}}
+bon = ["dep:bon"]
+{{/useBonBuilder}}
+{{/reqwestTrait}}

modules/openapi-generator/src/main/resources/rust/reqwest-trait/api.mustache

@@ -0,0 +1,402 @@
+{{>partial_header}}
+
+use async_trait::async_trait;
+{{#mockall}}
+#[cfg(feature = "mockall")]
+use mockall::automock;
+{{/mockall}}
+use reqwest;
+use std::sync::Arc;
+use serde::{Deserialize, Serialize};
+use crate::{apis::ResponseContent, models};
+use super::{Error, configuration};
+
+{{#mockall}}
+#[cfg_attr(feature = "mockall", automock)]
+{{/mockall}}
+#[async_trait]
+pub trait {{{classname}}}: Send + Sync {
+{{#operations}}
+{{#operation}}
+{{#vendorExtensions.x-group-parameters}}
+    async fn {{{operationId}}}(&self, {{#allParams}}{{#-first}} params: {{{operationIdCamelCase}}}Params {{/-first}}{{/allParams}}) -> Result<{{#supportMultipleResponses}}ResponseContent<{{{operationIdCamelCase}}}Success>{{/supportMultipleResponses}}{{^supportMultipleResponses}}{{^returnType}}(){{/returnType}}{{{returnType}}}{{/supportMultipleResponses}}, Error<{{{operationIdCamelCase}}}Error>>;
+{{/vendorExtensions.x-group-parameters}}
+{{^vendorExtensions.x-group-parameters}}
+    async fn {{{operationId}}}<{{#allParams}}'{{{paramName}}}{{^-last}}, {{/-last}}{{/allParams}}>(&self, {{#allParams}}{{{paramName}}}: {{^required}}Option<{{/required}}{{#required}}{{#isNullable}}Option<{{/isNullable}}{{/required}}{{#isString}}{{#isArray}}Vec<{{/isArray}}{{^isUuid}}&'{{{paramName}}} str{{/isUuid}}{{#isArray}}>{{/isArray}}{{/isString}}{{#isUuid}}{{#isArray}}Vec<{{/isArray}}&str{{#isArray}}>{{/isArray}}{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{^required}}>{{/required}}{{#required}}{{#isNullable}}>{{/isNullable}}{{/required}}{{^-last}}, {{/-last}}{{/allParams}}) -> Result<{{#supportMultipleResponses}}ResponseContent<{{{operationIdCamelCase}}}Success>{{/supportMultipleResponses}}{{^supportMultipleResponses}}{{^returnType}}(){{/returnType}}{{{returnType}}}{{/supportMultipleResponses}}, Error<{{{operationIdCamelCase}}}Error>>;
+{{/vendorExtensions.x-group-parameters}}
+{{/operation}}
+{{/operations}}
+}
+
+pub struct {{{classname}}}Client {
+    configuration: Arc<configuration::Configuration>
+}
+
+impl {{classname}}Client {
+    pub fn new(configuration: Arc<configuration::Configuration>) -> Self {
+        Self { configuration }
+    }
+}
+
+
+{{#operations}}
+{{#operation}}
+{{#vendorExtensions.x-group-parameters}}
+{{#allParams}}
+{{#-first}}
+/// struct for passing parameters to the method [`{{operationId}}`]
+#[derive(Clone, Debug)]
+{{#useBonBuilder}}
+#[cfg_attr(feature = "bon", derive(::bon::Builder))]
+{{/useBonBuilder}}
+pub struct {{{operationIdCamelCase}}}Params {
+{{/-first}}
+    {{#description}}
+    /// {{{.}}}
+    {{/description}}
+    pub {{{paramName}}}: {{^required}}Option<{{/required}}{{#required}}{{#isNullable}}Option<{{/isNullable}}{{/required}}{{^isUuid}}{{#isString}}{{#isArray}}Vec<{{/isArray}}String{{#isArray}}>{{/isArray}}{{/isString}}{{/isUuid}}{{#isUuid}}{{#isArray}}Vec<{{/isArray}}String{{#isArray}}>{{/isArray}}{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{^required}}>{{/required}}{{#required}}{{#isNullable}}>{{/isNullable}}{{/required}}{{^-last}},{{/-last}}
+{{#-last}}
+}
+
+{{/-last}}
+{{/allParams}}
+{{/vendorExtensions.x-group-parameters}}
+{{/operation}}
+{{/operations}}
+
+#[async_trait]
+impl {{classname}} for {{classname}}Client {
+    {{#operations}}
+    {{#operation}}
+    {{#description}}
+    /// {{{.}}}
+    {{/description}}
+    {{#notes}}
+    /// {{{.}}}
+    {{/notes}}
+    {{#vendorExtensions.x-group-parameters}}
+    async fn {{{operationId}}}(&self, {{#allParams}}{{#-first}} params: {{{operationIdCamelCase}}}Params {{/-first}}{{/allParams}}) -> Result<{{#supportMultipleResponses}}ResponseContent<{{{operationIdCamelCase}}}Success>{{/supportMultipleResponses}}{{^supportMultipleResponses}}{{^returnType}}(){{/returnType}}{{{returnType}}}{{/supportMultipleResponses}}, Error<{{{operationIdCamelCase}}}Error>> {
+        {{#allParams}}{{#-first}}
+        let {{{operationIdCamelCase}}}Params {
+            {{#allParams}}
+            {{{paramName}}},
+            {{/allParams}}
+        } = params;
+        {{/-first}}{{/allParams}}
+
+    {{/vendorExtensions.x-group-parameters}}
+    {{^vendorExtensions.x-group-parameters}}
+    async fn {{{operationId}}}<{{#allParams}}'{{{paramName}}}{{^-last}}, {{/-last}}{{/allParams}}>(&self, {{#allParams}}{{{paramName}}}: {{^required}}Option<{{/required}}{{#required}}{{#isNullable}}Option<{{/isNullable}}{{/required}}{{#isString}}{{#isArray}}Vec<{{/isArray}}{{^isUuid}}&'{{{paramName}}} str{{/isUuid}}{{#isArray}}>{{/isArray}}{{/isString}}{{#isUuid}}{{#isArray}}Vec<{{/isArray}}&str{{#isArray}}>{{/isArray}}{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{^required}}>{{/required}}{{#required}}{{#isNullable}}>{{/isNullable}}{{/required}}{{^-last}}, {{/-last}}{{/allParams}}) -> Result<{{#supportMultipleResponses}}ResponseContent<{{{operationIdCamelCase}}}Success>{{/supportMultipleResponses}}{{^supportMultipleResponses}}{{^returnType}}(){{/returnType}}{{{returnType}}}{{/supportMultipleResponses}}, Error<{{{operationIdCamelCase}}}Error>> {
+    {{/vendorExtensions.x-group-parameters}}
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}{{{path}}}", local_var_configuration.base_path{{#pathParams}}, {{{baseName}}}={{#isString}}crate::apis::urlencode({{/isString}}{{{paramName}}}{{^required}}.unwrap(){{/required}}{{#required}}{{#isNullable}}.unwrap(){{/isNullable}}{{/required}}{{#isArray}}.join(",").as_ref(){{/isArray}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}.to_string(){{/isContainer}}{{/isPrimitiveType}}{{/isUuid}}{{/isString}}{{#isString}}){{/isString}}{{/pathParams}});
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::{{{httpMethod}}}, local_var_uri_str.as_str());
+
+        {{#queryParams}}
+        {{#required}}
+        {{#isArray}}
+        local_var_req_builder = match "{{collectionFormat}}" {
+            "multi" => local_var_req_builder.query(&{{{paramName}}}.into_iter().map(|p| ("{{{baseName}}}".to_owned(), p.to_string())).collect::<Vec<(std::string::String, std::string::String)>>()),
+            _ => local_var_req_builder.query(&[("{{{baseName}}}", &{{{paramName}}}.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(",").to_string())]),
+        };
+        {{/isArray}}
+        {{^isArray}}
+        {{^isNullable}}
+        local_var_req_builder = local_var_req_builder.query(&[("{{{baseName}}}", &{{{paramName}}}.to_string())]);
+        {{/isNullable}}
+        {{#isNullable}}
+        {{#isDeepObject}}
+        if let Some(ref local_var_str) = {{{paramName}}} {
+            let params = crate::apis::parse_deep_object("{{{baseName}}}", local_var_str);
+            local_var_req_builder = local_var_req_builder.query(&params);
+        };
+        {{/isDeepObject}}
+        {{^isDeepObject}}
+        if let Some(ref local_var_str) = {{{paramName}}} {
+            local_var_req_builder = local_var_req_builder.query(&[("{{{baseName}}}", &local_var_str.to_string())]);
+        };
+        {{/isDeepObject}}
+        {{/isNullable}}
+        {{/isArray}}
+        {{/required}}
+        {{^required}}
+        if let Some(ref local_var_str) = {{{paramName}}} {
+            {{#isArray}}
+            local_var_req_builder = match "{{collectionFormat}}" {
+                "multi" => local_var_req_builder.query(&local_var_str.into_iter().map(|p| ("{{{baseName}}}".to_owned(), p.to_string())).collect::<Vec<(std::string::String, std::string::String)>>()),
+                _ => local_var_req_builder.query(&[("{{{baseName}}}", &local_var_str.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(",").to_string())]),
+            };
+            {{/isArray}}
+            {{^isArray}}
+            {{#isDeepObject}}
+            let params = crate::apis::parse_deep_object("{{{baseName}}}", local_var_str);
+            local_var_req_builder = local_var_req_builder.query(&params);
+            {{/isDeepObject}}
+            {{^isDeepObject}}
+            local_var_req_builder = local_var_req_builder.query(&[("{{{baseName}}}", &local_var_str.to_string())]);
+            {{/isDeepObject}}
+            {{/isArray}}
+        }
+        {{/required}}
+        {{/queryParams}}
+        {{#hasAuthMethods}}
+        {{#authMethods}}
+        {{#isApiKey}}
+        {{#isKeyInQuery}}
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.query(&[("{{{keyParamName}}}", local_var_value)]);
+        }
+        {{/isKeyInQuery}}
+        {{/isApiKey}}
+        {{/authMethods}}
+        {{/hasAuthMethods}}
+        {{#hasAuthMethods}}
+        {{#withAWSV4Signature}}
+        if let Some(ref local_var_aws_v4_key) = local_var_configuration.aws_v4_key {
+            let local_var_new_headers = match local_var_aws_v4_key.sign(
+            &local_var_uri_str,
+            "{{{httpMethod}}}",
+            {{#hasBodyParam}}
+            {{#bodyParams}}
+            &serde_json::to_string(&{{{paramName}}}).expect("param should serialize to string"),
+            {{/bodyParams}}
+            {{/hasBodyParam}}
+            {{^hasBodyParam}}
+            "",
+            {{/hasBodyParam}}
+            ) {
+            Ok(new_headers) => new_headers,
+            Err(err) => return Err(Error::AWSV4SignatureError(err)),
+            };
+        for (local_var_name, local_var_value) in local_var_new_headers.iter() {
+            local_var_req_builder = local_var_req_builder.header(local_var_name.as_str(), local_var_value.as_str());
+        }
+        }
+        {{/withAWSV4Signature}}
+        {{/hasAuthMethods}}
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        {{#hasHeaderParams}}
+        {{#headerParams}}
+        {{#required}}
+        {{^isNullable}}
+        local_var_req_builder = local_var_req_builder.header("{{{baseName}}}", {{{paramName}}}{{#isArray}}.join(","){{/isArray}}.to_string());
+        {{/isNullable}}
+        {{#isNullable}}
+        match {{{paramName}}} {
+            Some(local_var_param_value) => { local_var_req_builder = local_var_req_builder.header("{{{baseName}}}", local_var_param_value{{#isArray}}.join(","){{/isArray}}.to_string()); },
+            None => { local_var_req_builder = local_var_req_builder.header("{{{baseName}}}", ""); },
+        }
+        {{/isNullable}}
+        {{/required}}
+        {{^required}}
+        if let Some(local_var_param_value) = {{{paramName}}} {
+            local_var_req_builder = local_var_req_builder.header("{{{baseName}}}", local_var_param_value{{#isArray}}.join(","){{/isArray}}.to_string());
+        }
+        {{/required}}
+        {{/headerParams}}
+        {{/hasHeaderParams}}
+        {{#hasAuthMethods}}
+        {{#authMethods}}
+        {{#supportTokenSource}}
+        // Obtain a token from source provider.
+        // Tokens can be Id or access tokens depending on the provider type and configuration.
+        let token = local_var_configuration.token_source.token().await.map_err(Error::TokenSource)?;
+        // The token format is the responsibility of the provider, thus we just set the authorization header with whatever is given.
+        local_var_req_builder = local_var_req_builder.header(reqwest::header::AUTHORIZATION, token);
+        {{/supportTokenSource}}
+        {{^supportTokenSource}}
+        {{#isApiKey}}
+        {{#isKeyInHeader}}
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("{{{keyParamName}}}", local_var_value);
+        };
+        {{/isKeyInHeader}}
+        {{/isApiKey}}
+        {{#isBasic}}
+        {{#isBasicBasic}}
+        if let Some(ref local_var_auth_conf) = local_var_configuration.basic_auth {
+            local_var_req_builder = local_var_req_builder.basic_auth(local_var_auth_conf.0.to_owned(), local_var_auth_conf.1.to_owned());
+        };
+        {{/isBasicBasic}}
+        {{#isBasicBearer}}
+        if let Some(ref local_var_token) = local_var_configuration.bearer_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+        {{/isBasicBearer}}
+        {{/isBasic}}
+        {{#isOAuth}}
+        if let Some(ref local_var_token) = local_var_configuration.oauth_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+        {{/isOAuth}}
+        {{/supportTokenSource}}
+        {{/authMethods}}
+        {{/hasAuthMethods}}
+        {{#isMultipart}}
+        {{#hasFormParams}}
+        let mut local_var_form = reqwest::multipart::Form::new();
+        {{#formParams}}
+        {{#isFile}}
+        // TODO: support file upload for '{{{baseName}}}' parameter
+        {{/isFile}}
+        {{^isFile}}
+        {{#required}}
+        {{^isNullable}}
+        local_var_form = local_var_form.text("{{{baseName}}}", {{{paramName}}}{{#isArray}}.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(","){{/isArray}}.to_string());
+        {{/isNullable}}
+        {{#isNullable}}
+        match {{{paramName}}} {
+            Some(local_var_param_value) => { local_var_form = local_var_form.text("{{{baseName}}}", local_var_param_value{{#isArray}}.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(","){{/isArray}}.to_string()); },
+            None => { local_var_form = local_var_form.text("{{{baseName}}}", ""); },
+        }
+        {{/isNullable}}
+        {{/required}}
+        {{^required}}
+        if let Some(local_var_param_value) = {{{paramName}}} {
+            local_var_form = local_var_form.text("{{{baseName}}}", local_var_param_value{{#isArray}}.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(","){{/isArray}}.to_string());
+        }
+        {{/required}}
+        {{/isFile}}
+        {{/formParams}}
+        local_var_req_builder = local_var_req_builder.multipart(local_var_form);
+        {{/hasFormParams}}
+        {{/isMultipart}}
+        {{^isMultipart}}
+        {{#hasFormParams}}
+        let mut local_var_form_params = std::collections::HashMap::new();
+        {{#formParams}}
+        {{#isFile}}
+        {{#required}}
+        {{^isNullable}}
+        local_var_form_params.insert("{{{baseName}}}", unimplemented!("File form param not supported with x-www-form-urlencoded content"));
+        {{/isNullable}}
+        {{#isNullable}}
+        match {{{paramName}}} {
+            Some(local_var_param_value) => { local_var_form_params.insert("{{{baseName}}}", unimplemented!("File form param not supported with x-www-form-urlencoded content")); },
+            None => { unimplemented!("Required nullable file form param not supported with x-www-form-urlencoded content"); },
+        }
+        {{/isNullable}}
+        {{/required}}
+        {{^required}}
+        if let Some(local_var_param_value) = {{{paramName}}} {
+            local_var_form_params.insert("{{{baseName}}}", unimplemented!("File form param not supported with x-www-form-urlencoded content"));
+        }
+        {{/required}}
+        {{/isFile}}
+        {{^isFile}}
+        {{#required}}
+        {{^isNullable}}
+        local_var_form_params.insert("{{{baseName}}}", {{{paramName}}}{{#isArray}}.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(","){{/isArray}}.to_string());
+        {{/isNullable}}
+        {{#isNullable}}
+        match {{{paramName}}} {
+            Some(local_var_param_value) => { local_var_form_params.insert("{{{baseName}}}", local_var_param_value{{#isArray}}.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(","){{/isArray}}.to_string()); },
+            None => { local_var_form_params.insert("{{{baseName}}}", ""); },
+        }
+        {{/isNullable}}
+        {{/required}}
+        {{^required}}
+        if let Some(local_var_param_value) = {{{paramName}}} {
+            local_var_form_params.insert("{{{baseName}}}", local_var_param_value{{#isArray}}.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(","){{/isArray}}.to_string());
+        }
+        {{/required}}
+        {{/isFile}}
+        {{/formParams}}
+        local_var_req_builder = local_var_req_builder.form(&local_var_form_params);
+        {{/hasFormParams}}
+        {{/isMultipart}}
+        {{#hasBodyParam}}
+        {{#bodyParams}}
+        local_var_req_builder = local_var_req_builder.json(&{{{paramName}}});
+        {{/bodyParams}}
+        {{/hasBodyParam}}
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            {{^supportMultipleResponses}}
+            {{^returnType}}
+            Ok(())
+            {{/returnType}}
+            {{#returnType}}
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+            {{/returnType}}
+            {{/supportMultipleResponses}}
+            {{#supportMultipleResponses}}
+            let local_var_entity: Option<{{{operationIdCamelCase}}}Success> = serde_json::from_str(&local_var_content).ok();
+            let local_var_result = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Ok(local_var_result)
+            {{/supportMultipleResponses}}
+        } else {
+            let local_var_entity: Option<{{{operationIdCamelCase}}}Error> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    {{/operation}}
+    {{/operations}}
+}
+
+{{#supportMultipleResponses}}
+{{#operations}}
+{{#operation}}
+/// struct for typed successes of method [`{{operationId}}`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum {{{operationIdCamelCase}}}Success {
+    {{#responses}}
+    {{#is2xx}}
+    Status{{code}}({{#isEnum}}{{{enumName}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}),
+    {{/is2xx}}
+    {{#is3xx}}
+    Status{{code}}({{#isEnum}}{{{enumName}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}),
+    {{/is3xx}}
+    {{/responses}}
+    UnknownValue(serde_json::Value),
+}
+
+{{/operation}}
+{{/operations}}
+{{/supportMultipleResponses}}
+{{#operations}}
+{{#operation}}
+/// struct for typed errors of method [`{{operationId}}`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum {{{operationIdCamelCase}}}Error {
+    {{#responses}}
+    {{#is4xx}}
+    Status{{code}}({{#isEnum}}{{{enumName}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}),
+    {{/is4xx}}
+    {{#is5xx}}
+    Status{{code}}({{#isEnum}}{{{enumName}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}),
+    {{/is5xx}}
+    {{#isDefault}}
+    DefaultResponse({{#isEnum}}{{{enumName}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}),
+    {{/isDefault}}
+    {{/responses}}
+    UnknownValue(serde_json::Value),
+}
+
+{{/operation}}
+{{/operations}}

modules/openapi-generator/src/main/resources/rust/reqwest-trait/api_mod.mustache

@@ -0,0 +1,215 @@
+use std::error;
+use std::fmt;
+{{#withAWSV4Signature}}
+use aws_sigv4;
+{{/withAWSV4Signature}}
+
+#[derive(Debug, Clone)]
+pub struct ResponseContent<T> {
+    pub status: reqwest::StatusCode,
+    pub content: String,
+    pub entity: Option<T>,
+}
+
+#[derive(Debug)]
+pub enum Error<T> {
+    Reqwest(reqwest::Error),
+    {{#supportMiddleware}}
+    ReqwestMiddleware(reqwest_middleware::Error),
+    {{/supportMiddleware}}
+    Serde(serde_json::Error),
+    Io(std::io::Error),
+    ResponseError(ResponseContent<T>),
+    {{#withAWSV4Signature}}
+    AWSV4SignatureError(aws_sigv4::http_request::Error),
+    {{/withAWSV4Signature}}
+    {{#supportTokenSource}}
+    TokenSource(Box<dyn std::error::Error + Send + Sync>),
+    {{/supportTokenSource}}
+}
+
+impl <T> fmt::Display for Error<T> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let (module, e) = match self {
+            Error::Reqwest(e) => ("reqwest", e.to_string()),
+            {{#supportMiddleware}}
+            Error::ReqwestMiddleware(e) => ("reqwest-middleware", e.to_string()),
+            {{/supportMiddleware}}
+            Error::Serde(e) => ("serde", e.to_string()),
+            Error::Io(e) => ("IO", e.to_string()),
+            Error::ResponseError(e) => ("response", format!("status code {}", e.status)),
+            {{#withAWSV4Signature}}
+            Error::AWSV4SignatureError(e) => ("aws v4 signature", e.to_string()),
+            {{/withAWSV4Signature}}
+            {{#supportTokenSource}}
+            Error::TokenSource(e) => ("token source failure", e.to_string()),
+            {{/supportTokenSource}}
+        };
+        write!(f, "error in {}: {}", module, e)
+    }
+}
+
+impl <T: fmt::Debug> error::Error for Error<T> {
+    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
+        Some(match self {
+            Error::Reqwest(e) => e,
+            {{#supportMiddleware}}
+            Error::ReqwestMiddleware(e) => e,
+            {{/supportMiddleware}}
+            Error::Serde(e) => e,
+            Error::Io(e) => e,
+            Error::ResponseError(_) => return None,
+            {{#withAWSV4Signature}}
+            Error::AWSV4SignatureError(_) => return None,
+            {{/withAWSV4Signature}}
+            {{#supportTokenSource}}
+            Error::TokenSource(e) => &**e,
+            {{/supportTokenSource}}
+        })
+    }
+}
+
+impl <T> From<reqwest::Error> for Error<T> {
+    fn from(e: reqwest::Error) -> Self {
+        Error::Reqwest(e)
+    }
+}
+
+{{#supportMiddleware}}
+impl<T> From<reqwest_middleware::Error> for Error<T> {
+    fn from(e: reqwest_middleware::Error) -> Self {
+        Error::ReqwestMiddleware(e)
+    }
+}
+
+{{/supportMiddleware}}
+impl <T> From<serde_json::Error> for Error<T> {
+    fn from(e: serde_json::Error) -> Self {
+        Error::Serde(e)
+    }
+}
+
+impl <T> From<std::io::Error> for Error<T> {
+    fn from(e: std::io::Error) -> Self {
+        Error::Io(e)
+    }
+}
+
+pub fn urlencode<T: AsRef<str>>(s: T) -> String {
+    ::url::form_urlencoded::byte_serialize(s.as_ref().as_bytes()).collect()
+}
+
+pub fn parse_deep_object(prefix: &str, value: &serde_json::Value) -> Vec<(String, String)> {
+    if let serde_json::Value::Object(object) = value {
+        let mut params = vec![];
+
+        for (key, value) in object {
+            match value {
+                serde_json::Value::Object(_) => params.append(&mut parse_deep_object(
+                    &format!("{}[{}]", prefix, key),
+                    value,
+                )),
+                serde_json::Value::Array(array) => {
+                    for (i, value) in array.iter().enumerate() {
+                        params.append(&mut parse_deep_object(
+                            &format!("{}[{}][{}]", prefix, key, i),
+                            value,
+                        ));
+                    }
+                },
+                serde_json::Value::String(s) => params.push((format!("{}[{}]", prefix, key), s.clone())),
+                _ => params.push((format!("{}[{}]", prefix, key), value.to_string())),
+            }
+        }
+
+        return params;
+    }
+
+    unimplemented!("Only objects are supported with style=deepObject")
+}
+
+{{#apiInfo}}
+{{#apis}}
+pub mod {{{classFilename}}};
+{{/apis}}
+{{/apiInfo}}
+
+pub mod configuration;
+
+{{#topLevelApiClient}}
+use std::sync::Arc;
+
+pub trait Api {
+    {{#apiInfo}}
+    {{#apis}}
+    fn {{{classFilename}}}(&self) -> &dyn {{{classFilename}}}::{{classname}};
+    {{/apis}}
+    {{/apiInfo}}
+}
+
+pub struct ApiClient {
+    {{#apiInfo}}
+    {{#apis}}
+    {{{classFilename}}}: Box<dyn {{{classFilename}}}::{{classname}}>,
+    {{/apis}}
+    {{/apiInfo}}
+}
+
+impl ApiClient {
+    pub fn new(configuration: Arc<configuration::Configuration>) -> Self {
+        Self {
+            {{#apiInfo}}
+            {{#apis}}
+            {{{classFilename}}}: Box::new({{{classFilename}}}::{{classname}}Client::new(configuration.clone())),
+            {{/apis}}
+            {{/apiInfo}}
+        }
+    }
+}
+
+impl Api for ApiClient {
+    {{#apiInfo}}
+    {{#apis}}
+    fn {{{classFilename}}}(&self) -> &dyn {{{classFilename}}}::{{classname}} {
+        self.{{{classFilename}}}.as_ref()
+    }
+    {{/apis}}
+    {{/apiInfo}}
+}
+
+{{#mockall}}
+#[cfg(feature = "mockall")]
+pub struct MockApiClient {
+    {{#apiInfo}}
+    {{#apis}}
+    pub {{{classFilename}}}_mock: {{{classFilename}}}::Mock{{classname}},
+    {{/apis}}
+    {{/apiInfo}}
+}
+
+#[cfg(feature = "mockall")]
+impl MockApiClient {
+    pub fn new() -> Self {
+        Self {
+            {{#apiInfo}}
+            {{#apis}}
+            {{{classFilename}}}_mock: {{{classFilename}}}::Mock{{classname}}::new(),
+            {{/apis}}
+            {{/apiInfo}}
+        }
+    }
+}
+
+#[cfg(feature = "mockall")]
+impl Api for MockApiClient {
+    {{#apiInfo}}
+    {{#apis}}
+    fn {{{classFilename}}}(&self) -> &dyn {{{classFilename}}}::{{classname}} {
+        &self.{{{classFilename}}}_mock
+    }
+    {{/apis}}
+    {{/apiInfo}}
+}
+{{/mockall}}
+
+{{/topLevelApiClient}}

modules/openapi-generator/src/main/resources/rust/reqwest-trait/configuration.mustache

@@ -0,0 +1,120 @@
+{{>partial_header}}
+
+{{#withAWSV4Signature}}
+use std::time::SystemTime;
+use aws_sigv4::http_request::{sign, SigningSettings, SigningParams, SignableRequest};
+use http;
+use secrecy::{SecretString, ExposeSecret};
+{{/withAWSV4Signature}}
+{{#supportTokenSource}}
+use std::sync::Arc;
+use google_cloud_token::TokenSource;
+use async_trait::async_trait;
+{{/supportTokenSource}}
+
+#[derive(Debug, Clone)]
+pub struct Configuration {
+    pub base_path: String,
+    pub user_agent: Option<String>,
+    pub client: {{#supportMiddleware}}reqwest_middleware::ClientWithMiddleware{{/supportMiddleware}}{{^supportMiddleware}}reqwest::Client{{/supportMiddleware}},
+    {{^supportTokenSource}}
+    pub basic_auth: Option<BasicAuth>,
+    pub oauth_access_token: Option<String>,
+    pub bearer_access_token: Option<String>,
+    pub api_key: Option<ApiKey>,
+    {{/supportTokenSource}}
+    {{#withAWSV4Signature}}
+    pub aws_v4_key: Option<AWSv4Key>,
+    {{/withAWSV4Signature}}
+    {{#supportTokenSource}}
+    pub token_source: Arc<dyn TokenSource>,
+    {{/supportTokenSource}}
+}
+{{^supportTokenSource}}
+
+pub type BasicAuth = (String, Option<String>);
+
+#[derive(Debug, Clone)]
+pub struct ApiKey {
+    pub prefix: Option<String>,
+    pub key: String,
+}
+{{/supportTokenSource}}
+
+{{#withAWSV4Signature}}
+#[derive(Debug, Clone)]
+pub struct AWSv4Key {
+    pub access_key: String,
+    pub secret_key: SecretString,
+    pub region: String,
+    pub service: String,
+}
+
+impl AWSv4Key {
+    pub fn sign(&self, uri: &str, method: &str, body: &str) -> Result<Vec::<(String, String)>, aws_sigv4::http_request::Error> {
+	let request = http::Request::builder()
+	    .uri(uri)
+	    .method(method)
+	    .body(body).unwrap();
+	let signing_settings = SigningSettings::default();
+	let signing_params = SigningParams::builder()
+	    .access_key(self.access_key.as_str())
+	    .secret_key(self.secret_key.expose_secret().as_str())
+	    .region(self.region.as_str())
+	    .service_name(self.service.as_str())
+	    .time(SystemTime::now())
+	    .settings(signing_settings)
+	    .build()
+	    .unwrap();
+	let signable_request = SignableRequest::from(&request);
+	let (mut signing_instructions, _signature) = sign(signable_request, &signing_params)?.into_parts();
+	let mut additional_headers = Vec::<(String, String)>::new();
+	if let Some(new_headers) = signing_instructions.take_headers() {
+            for (name, value) in new_headers.into_iter() {
+		additional_headers.push((name.expect("header should have name").to_string(),
+		                         value.to_str().expect("header value should be a string").to_string()));
+            }
+        }
+	Ok(additional_headers)
+    }
+}
+{{/withAWSV4Signature}}
+
+impl Configuration {
+    pub fn new() -> Configuration {
+        Configuration::default()
+    }
+}
+
+impl Default for Configuration {
+    fn default() -> Self {
+        Configuration {
+            base_path: "{{{basePath}}}".to_owned(),
+            user_agent: {{#httpUserAgent}}Some("{{{.}}}".to_owned()){{/httpUserAgent}}{{^httpUserAgent}}Some("OpenAPI-Generator/{{{version}}}/rust".to_owned()){{/httpUserAgent}},
+            client: {{#supportMiddleware}}reqwest_middleware::ClientBuilder::new(reqwest::Client::new()).build(){{/supportMiddleware}}{{^supportMiddleware}}reqwest::Client::new(){{/supportMiddleware}},
+            {{^supportTokenSource}}
+            basic_auth: None,
+            oauth_access_token: None,
+            bearer_access_token: None,
+            api_key: None,
+            {{/supportTokenSource}}
+            {{#withAWSV4Signature}}
+            aws_v4_key: None,
+            {{/withAWSV4Signature}}
+            {{#supportTokenSource}}
+            token_source: Arc::new(NoopTokenSource{}),
+            {{/supportTokenSource}}
+        }
+    }
+}
+{{#supportTokenSource}}
+#[derive(Debug)]
+struct NoopTokenSource{}
+
+#[async_trait]
+impl TokenSource for NoopTokenSource {
+    async fn token(&self) -> Result<String, Box<dyn std::error::Error + Send + Sync>> {
+        panic!("This is dummy token source. You can use TokenSourceProvider from 'google_cloud_auth' crate, or any other compatible crate.")
+    }
+}
+{{/supportTokenSource}}

samples/client/petstore/rust/reqwest-trait/petstore/.gitignore

@@ -0,0 +1,3 @@
+/target/
+**/*.rs.bk
+Cargo.lock

samples/client/petstore/rust/reqwest-trait/petstore/.openapi-generator-ignore

@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

samples/client/petstore/rust/reqwest-trait/petstore/.openapi-generator/FILES

@@ -0,0 +1,55 @@
+.gitignore
+.travis.yml
+Cargo.toml
+README.md
+docs/ActionContainer.md
+docs/ApiResponse.md
+docs/ArrayItemRefTest.md
+docs/Baz.md
+docs/Category.md
+docs/EnumArrayTesting.md
+docs/FakeApi.md
+docs/NullableArray.md
+docs/NumericEnumTesting.md
+docs/OptionalTesting.md
+docs/Order.md
+docs/Pet.md
+docs/PetApi.md
+docs/PropertyTest.md
+docs/Ref.md
+docs/Return.md
+docs/StoreApi.md
+docs/Tag.md
+docs/TestingApi.md
+docs/TypeTesting.md
+docs/UniqueItemArrayTesting.md
+docs/User.md
+docs/UserApi.md
+git_push.sh
+src/apis/configuration.rs
+src/apis/fake_api.rs
+src/apis/mod.rs
+src/apis/pet_api.rs
+src/apis/store_api.rs
+src/apis/testing_api.rs
+src/apis/user_api.rs
+src/lib.rs
+src/models/action_container.rs
+src/models/api_response.rs
+src/models/array_item_ref_test.rs
+src/models/baz.rs
+src/models/category.rs
+src/models/enum_array_testing.rs
+src/models/mod.rs
+src/models/model_ref.rs
+src/models/model_return.rs
+src/models/nullable_array.rs
+src/models/numeric_enum_testing.rs
+src/models/optional_testing.rs
+src/models/order.rs
+src/models/pet.rs
+src/models/property_test.rs
+src/models/tag.rs
+src/models/type_testing.rs
+src/models/unique_item_array_testing.rs
+src/models/user.rs

samples/client/petstore/rust/reqwest-trait/petstore/.openapi-generator/VERSION

@@ -0,0 +1 @@
+7.10.0-SNAPSHOT

samples/client/petstore/rust/reqwest-trait/petstore/.travis.yml

@@ -0,0 +1 @@
+language: rust

samples/client/petstore/rust/reqwest-trait/petstore/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "petstore-reqwest"
+version = "1.0.0"
+authors = ["OpenAPI Generator team and contributors"]
+description = "This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters."
+license = "Apache-2.0"
+edition = "2021"
+
+[dependencies]
+serde = { version = "^1.0", features = ["derive"] }
+serde_with = { version = "^3.8", default-features = false, features = ["base64", "std", "macros"] }
+serde_json = "^1.0"
+serde_repr = "^0.1"
+url = "^2.5"
+uuid = { version = "^1.8", features = ["serde", "v4"] }
+async-trait = "^0.1"
+reqwest = { version = "^0.12", features = ["json", "multipart"] }
+mockall = { version = "^0.13", optional = true}
+[features]
+mockall = ["dep:mockall"]

samples/client/petstore/rust/reqwest-trait/petstore/README.md

@@ -0,0 +1,85 @@
+# Rust API client for petstore-reqwest
+
+This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+
+
+## Overview
+
+This API client was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.  By using the [openapi-spec](https://openapis.org) from a remote server, you can easily generate an API client.
+
+- API version: 1.0.0
+- Package version: 1.0.0
+- Generator version: 7.10.0-SNAPSHOT
+- Build package: `org.openapitools.codegen.languages.RustClientCodegen`
+
+## Installation
+
+Put the package under your project folder in a directory named `petstore-reqwest` and add the following to `Cargo.toml` under `[dependencies]`:
+
+```
+petstore-reqwest = { path = "./petstore-reqwest" }
+```
+
+## Documentation for API Endpoints
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*FakeApi* | [**test_nullable_required_param**](docs/FakeApi.md#test_nullable_required_param) | **GET** /fake/user/{username} | To test nullable required parameters
+*PetApi* | [**add_pet**](docs/PetApi.md#add_pet) | **POST** /pet | Add a new pet to the store
+*PetApi* | [**delete_pet**](docs/PetApi.md#delete_pet) | **DELETE** /pet/{petId} | Deletes a pet
+*PetApi* | [**find_pets_by_status**](docs/PetApi.md#find_pets_by_status) | **GET** /pet/findByStatus | Finds Pets by status
+*PetApi* | [**find_pets_by_tags**](docs/PetApi.md#find_pets_by_tags) | **GET** /pet/findByTags | Finds Pets by tags
+*PetApi* | [**get_pet_by_id**](docs/PetApi.md#get_pet_by_id) | **GET** /pet/{petId} | Find pet by ID
+*PetApi* | [**update_pet**](docs/PetApi.md#update_pet) | **PUT** /pet | Update an existing pet
+*PetApi* | [**update_pet_with_form**](docs/PetApi.md#update_pet_with_form) | **POST** /pet/{petId} | Updates a pet in the store with form data
+*PetApi* | [**upload_file**](docs/PetApi.md#upload_file) | **POST** /pet/{petId}/uploadImage | uploads an image
+*StoreApi* | [**delete_order**](docs/StoreApi.md#delete_order) | **DELETE** /store/order/{orderId} | Delete purchase order by ID
+*StoreApi* | [**get_inventory**](docs/StoreApi.md#get_inventory) | **GET** /store/inventory | Returns pet inventories by status
+*StoreApi* | [**get_order_by_id**](docs/StoreApi.md#get_order_by_id) | **GET** /store/order/{orderId} | Find purchase order by ID
+*StoreApi* | [**place_order**](docs/StoreApi.md#place_order) | **POST** /store/order | Place an order for a pet
+*TestingApi* | [**tests_file_response_get**](docs/TestingApi.md#tests_file_response_get) | **GET** /tests/fileResponse | Returns an image file
+*TestingApi* | [**tests_type_testing_get**](docs/TestingApi.md#tests_type_testing_get) | **GET** /tests/typeTesting | Route to test the TypeTesting schema
+*UserApi* | [**create_user**](docs/UserApi.md#create_user) | **POST** /user | Create user
+*UserApi* | [**create_users_with_array_input**](docs/UserApi.md#create_users_with_array_input) | **POST** /user/createWithArray | Creates list of users with given input array
+*UserApi* | [**create_users_with_list_input**](docs/UserApi.md#create_users_with_list_input) | **POST** /user/createWithList | Creates list of users with given input array
+*UserApi* | [**delete_user**](docs/UserApi.md#delete_user) | **DELETE** /user/{username} | Delete user
+*UserApi* | [**get_user_by_name**](docs/UserApi.md#get_user_by_name) | **GET** /user/{username} | Get user by user name
+*UserApi* | [**login_user**](docs/UserApi.md#login_user) | **GET** /user/login | Logs user into the system
+*UserApi* | [**logout_user**](docs/UserApi.md#logout_user) | **GET** /user/logout | Logs out current logged in user session
+*UserApi* | [**update_user**](docs/UserApi.md#update_user) | **PUT** /user/{username} | Updated user
+
+
+## Documentation For Models
+
+ - [ActionContainer](docs/ActionContainer.md)
+ - [ApiResponse](docs/ApiResponse.md)
+ - [ArrayItemRefTest](docs/ArrayItemRefTest.md)
+ - [Baz](docs/Baz.md)
+ - [Category](docs/Category.md)
+ - [EnumArrayTesting](docs/EnumArrayTesting.md)
+ - [NullableArray](docs/NullableArray.md)
+ - [NumericEnumTesting](docs/NumericEnumTesting.md)
+ - [OptionalTesting](docs/OptionalTesting.md)
+ - [Order](docs/Order.md)
+ - [Pet](docs/Pet.md)
+ - [PropertyTest](docs/PropertyTest.md)
+ - [Ref](docs/Ref.md)
+ - [Return](docs/Return.md)
+ - [Tag](docs/Tag.md)
+ - [TypeTesting](docs/TypeTesting.md)
+ - [UniqueItemArrayTesting](docs/UniqueItemArrayTesting.md)
+ - [User](docs/User.md)
+
+
+To get access to the crate's generated documentation, use:
+
+```
+cargo doc --open
+```
+
+## Author
+
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/ActionContainer.md

@@ -0,0 +1,11 @@
+# ActionContainer
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**action** | [**models::Baz**](Baz.md) |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/ApiResponse.md

@@ -0,0 +1,13 @@
+# ApiResponse
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**code** | Option<**i32**> |  | [optional]
+**r#type** | Option<**String**> |  | [optional]
+**message** | Option<**String**> |  | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/ArrayItemRefTest.md

@@ -0,0 +1,12 @@
+# ArrayItemRefTest
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**list_with_array_ref** | [**Vec<Vec<String>>**](Vec.md) |  | 
+**list_with_object_ref** | [**Vec<std::collections::HashMap<String, serde_json::Value>>**](std::collections::HashMap.md) |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/Baz.md

@@ -0,0 +1,14 @@
+# Baz
+
+## Enum Variants
+
+| Name | Value |
+|---- | -----|
+| A | A |
+| B | B |
+| Empty |  |
+
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/Category.md

@@ -0,0 +1,12 @@
+# Category
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | Option<**i64**> |  | [optional]
+**name** | Option<**String**> |  | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/EnumArrayTesting.md

@@ -0,0 +1,11 @@
+# EnumArrayTesting
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**required_enums** | **Vec<String>** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/FakeApi.md

@@ -0,0 +1,41 @@
+# \FakeApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**test_nullable_required_param**](FakeApi.md#test_nullable_required_param) | **GET** /fake/user/{username} | To test nullable required parameters
+
+
+
+## test_nullable_required_param
+
+> test_nullable_required_param(username, dummy_required_nullable_param, uppercase)
+To test nullable required parameters
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**username** | **String** | The name that needs to be fetched. Use user1 for testing. | [required] |
+**dummy_required_nullable_param** | Option<**String**> | To test nullable required parameters | [required] |
+**uppercase** | Option<**String**> | To test parameter names in upper case |  |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/NullableArray.md

@@ -0,0 +1,14 @@
+# NullableArray
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**array_nullable** | Option<**Vec<String>**> |  | [optional]
+**just_array** | Option<**Vec<String>**> |  | [optional]
+**nullable_string** | Option<**String**> |  | [optional]
+**just_string** | Option<**String**> |  | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/NumericEnumTesting.md

@@ -0,0 +1,15 @@
+# NumericEnumTesting
+
+## Enum Variants
+
+| Name | Value |
+|---- | -----|
+| Variant0 | 0 |
+| Variant1 | 1 |
+| Variant2 | 2 |
+| Variant3 | 3 |
+
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/OptionalTesting.md

@@ -0,0 +1,14 @@
+# OptionalTesting
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**optional_nonnull** | Option<**String**> |  | [optional]
+**required_nonnull** | **String** |  | 
+**optional_nullable** | Option<**String**> |  | [optional]
+**required_nullable** | Option<**String**> |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/Order.md

@@ -0,0 +1,16 @@
+# Order
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | Option<**i64**> |  | [optional]
+**pet_id** | Option<**i64**> |  | [optional]
+**quantity** | Option<**i32**> |  | [optional]
+**ship_date** | Option<**String**> |  | [optional]
+**status** | Option<**String**> | Order Status | [optional]
+**complete** | Option<**bool**> |  | [optional][default to false]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/Pet.md

@@ -0,0 +1,16 @@
+# Pet
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | Option<**i64**> |  | [optional]
+**category** | Option<[**models::Category**](Category.md)> |  | [optional]
+**name** | **String** |  | 
+**photo_urls** | **Vec<String>** |  | 
+**tags** | Option<[**Vec<models::Tag>**](Tag.md)> |  | [optional]
+**status** | Option<**String**> | pet status in the store | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/PetApi.md

@@ -0,0 +1,261 @@
+# \PetApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**add_pet**](PetApi.md#add_pet) | **POST** /pet | Add a new pet to the store
+[**delete_pet**](PetApi.md#delete_pet) | **DELETE** /pet/{petId} | Deletes a pet
+[**find_pets_by_status**](PetApi.md#find_pets_by_status) | **GET** /pet/findByStatus | Finds Pets by status
+[**find_pets_by_tags**](PetApi.md#find_pets_by_tags) | **GET** /pet/findByTags | Finds Pets by tags
+[**get_pet_by_id**](PetApi.md#get_pet_by_id) | **GET** /pet/{petId} | Find pet by ID
+[**update_pet**](PetApi.md#update_pet) | **PUT** /pet | Update an existing pet
+[**update_pet_with_form**](PetApi.md#update_pet_with_form) | **POST** /pet/{petId} | Updates a pet in the store with form data
+[**upload_file**](PetApi.md#upload_file) | **POST** /pet/{petId}/uploadImage | uploads an image
+
+
+
+## add_pet
+
+> models::Pet add_pet(pet)
+Add a new pet to the store
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**pet** | [**Pet**](Pet.md) | Pet object that needs to be added to the store | [required] |
+
+### Return type
+
+[**models::Pet**](Pet.md)
+
+### Authorization
+
+[petstore_auth](../README.md#petstore_auth)
+
+### HTTP request headers
+
+- **Content-Type**: application/json, application/xml
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## delete_pet
+
+> delete_pet(pet_id, api_key)
+Deletes a pet
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**pet_id** | **i64** | Pet id to delete | [required] |
+**api_key** | Option<**String**> |  |  |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+[petstore_auth](../README.md#petstore_auth)
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## find_pets_by_status
+
+> Vec<models::Pet> find_pets_by_status(status)
+Finds Pets by status
+
+Multiple status values can be provided with comma separated strings
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**status** | [**Vec<String>**](String.md) | Status values that need to be considered for filter | [required] |
+
+### Return type
+
+[**Vec<models::Pet>**](Pet.md)
+
+### Authorization
+
+[petstore_auth](../README.md#petstore_auth)
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## find_pets_by_tags
+
+> Vec<models::Pet> find_pets_by_tags(tags)
+Finds Pets by tags
+
+Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**tags** | [**Vec<String>**](String.md) | Tags to filter by | [required] |
+
+### Return type
+
+[**Vec<models::Pet>**](Pet.md)
+
+### Authorization
+
+[petstore_auth](../README.md#petstore_auth)
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## get_pet_by_id
+
+> models::Pet get_pet_by_id(pet_id)
+Find pet by ID
+
+Returns a single pet
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**pet_id** | **i64** | ID of pet to return | [required] |
+
+### Return type
+
+[**models::Pet**](Pet.md)
+
+### Authorization
+
+[api_key](../README.md#api_key)
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## update_pet
+
+> models::Pet update_pet(pet)
+Update an existing pet
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**pet** | [**Pet**](Pet.md) | Pet object that needs to be added to the store | [required] |
+
+### Return type
+
+[**models::Pet**](Pet.md)
+
+### Authorization
+
+[petstore_auth](../README.md#petstore_auth)
+
+### HTTP request headers
+
+- **Content-Type**: application/json, application/xml
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## update_pet_with_form
+
+> update_pet_with_form(pet_id, name, status)
+Updates a pet in the store with form data
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**pet_id** | **i64** | ID of pet that needs to be updated | [required] |
+**name** | Option<**String**> | Updated name of the pet |  |
+**status** | Option<**String**> | Updated status of the pet |  |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+[petstore_auth](../README.md#petstore_auth)
+
+### HTTP request headers
+
+- **Content-Type**: application/x-www-form-urlencoded
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## upload_file
+
+> models::ApiResponse upload_file(pet_id, additional_metadata, file)
+uploads an image
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**pet_id** | **i64** | ID of pet to update | [required] |
+**additional_metadata** | Option<**String**> | Additional data to pass to server |  |
+**file** | Option<**std::path::PathBuf**> | file to upload |  |
+
+### Return type
+
+[**models::ApiResponse**](ApiResponse.md)
+
+### Authorization
+
+[petstore_auth](../README.md#petstore_auth)
+
+### HTTP request headers
+
+- **Content-Type**: multipart/form-data
+- **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/PropertyTest.md

@@ -0,0 +1,11 @@
+# PropertyTest
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**uuid** | Option<[**uuid::Uuid**](uuid::Uuid.md)> |  | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/Ref.md

@@ -0,0 +1,11 @@
+# Ref
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**dummy** | Option<**String**> |  | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/Return.md

@@ -0,0 +1,13 @@
+# Return
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**r#match** | Option<**i32**> |  | [optional]
+**r#async** | Option<**bool**> |  | [optional]
+**param_super** | Option<**bool**> |  | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/StoreApi.md

@@ -0,0 +1,129 @@
+# \StoreApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**delete_order**](StoreApi.md#delete_order) | **DELETE** /store/order/{orderId} | Delete purchase order by ID
+[**get_inventory**](StoreApi.md#get_inventory) | **GET** /store/inventory | Returns pet inventories by status
+[**get_order_by_id**](StoreApi.md#get_order_by_id) | **GET** /store/order/{orderId} | Find purchase order by ID
+[**place_order**](StoreApi.md#place_order) | **POST** /store/order | Place an order for a pet
+
+
+
+## delete_order
+
+> delete_order(order_id)
+Delete purchase order by ID
+
+For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**order_id** | **String** | ID of the order that needs to be deleted | [required] |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## get_inventory
+
+> std::collections::HashMap<String, i32> get_inventory()
+Returns pet inventories by status
+
+Returns a map of status codes to quantities
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+**std::collections::HashMap<String, i32>**
+
+### Authorization
+
+[api_key](../README.md#api_key)
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## get_order_by_id
+
+> models::Order get_order_by_id(order_id)
+Find purchase order by ID
+
+For valid response try integer IDs with value <= 5 or > 10. Other values will generate exceptions
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**order_id** | **i64** | ID of pet that needs to be fetched | [required] |
+
+### Return type
+
+[**models::Order**](Order.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## place_order
+
+> models::Order place_order(order)
+Place an order for a pet
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**order** | [**Order**](Order.md) | order placed for purchasing the pet | [required] |
+
+### Return type
+
+[**models::Order**](Order.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/Tag.md

@@ -0,0 +1,12 @@
+# Tag
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | Option<**i64**> |  | [optional]
+**name** | Option<**String**> |  | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/TestingApi.md

@@ -0,0 +1,60 @@
+# \TestingApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**tests_file_response_get**](TestingApi.md#tests_file_response_get) | **GET** /tests/fileResponse | Returns an image file
+[**tests_type_testing_get**](TestingApi.md#tests_type_testing_get) | **GET** /tests/typeTesting | Route to test the TypeTesting schema
+
+
+
+## tests_file_response_get
+
+> std::path::PathBuf tests_file_response_get()
+Returns an image file
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+[**std::path::PathBuf**](std::path::PathBuf.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: image/jpeg
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## tests_type_testing_get
+
+> models::TypeTesting tests_type_testing_get()
+Route to test the TypeTesting schema
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+[**models::TypeTesting**](TypeTesting.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/TypeTesting.md

@@ -0,0 +1,18 @@
+# TypeTesting
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**int32** | **i32** |  | 
+**int64** | **i64** |  | 
+**float** | **f32** |  | 
+**double** | **f64** |  | 
+**string** | **String** |  | 
+**boolean** | **bool** |  | 
+**uuid** | [**uuid::Uuid**](uuid::Uuid.md) |  | 
+**bytes** | **String** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/UniqueItemArrayTesting.md

@@ -0,0 +1,11 @@
+# UniqueItemArrayTesting
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**unique_item_array** | **Vec<String>** | Helper object for the unique item array test | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/User.md

@@ -0,0 +1,18 @@
+# User
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | Option<**i64**> |  | [optional]
+**username** | **String** |  | 
+**first_name** | Option<**String**> |  | [optional]
+**last_name** | **String** |  | 
+**email** | Option<**String**> |  | [optional]
+**password** | Option<**String**> |  | [optional]
+**phone** | Option<**String**> |  | [optional]
+**user_status** | Option<**i32**> | User Status | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/rust/reqwest-trait/petstore/docs/UserApi.md

@@ -0,0 +1,255 @@
+# \UserApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**create_user**](UserApi.md#create_user) | **POST** /user | Create user
+[**create_users_with_array_input**](UserApi.md#create_users_with_array_input) | **POST** /user/createWithArray | Creates list of users with given input array
+[**create_users_with_list_input**](UserApi.md#create_users_with_list_input) | **POST** /user/createWithList | Creates list of users with given input array
+[**delete_user**](UserApi.md#delete_user) | **DELETE** /user/{username} | Delete user
+[**get_user_by_name**](UserApi.md#get_user_by_name) | **GET** /user/{username} | Get user by user name
+[**login_user**](UserApi.md#login_user) | **GET** /user/login | Logs user into the system
+[**logout_user**](UserApi.md#logout_user) | **GET** /user/logout | Logs out current logged in user session
+[**update_user**](UserApi.md#update_user) | **PUT** /user/{username} | Updated user
+
+
+
+## create_user
+
+> create_user(user)
+Create user
+
+This can only be done by the logged in user.
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**user** | [**User**](User.md) | Created user object | [required] |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+[api_key](../README.md#api_key)
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## create_users_with_array_input
+
+> create_users_with_array_input(user)
+Creates list of users with given input array
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**user** | [**Vec<models::User>**](User.md) | List of user object | [required] |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+[api_key](../README.md#api_key)
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## create_users_with_list_input
+
+> create_users_with_list_input(user)
+Creates list of users with given input array
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**user** | [**Vec<models::User>**](User.md) | List of user object | [required] |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+[api_key](../README.md#api_key)
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## delete_user
+
+> delete_user(username)
+Delete user
+
+This can only be done by the logged in user.
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**username** | **String** | The name that needs to be deleted | [required] |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+[api_key](../README.md#api_key)
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## get_user_by_name
+
+> models::User get_user_by_name(username)
+Get user by user name
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**username** | **String** | The name that needs to be fetched. Use user1 for testing. | [required] |
+
+### Return type
+
+[**models::User**](User.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## login_user
+
+> String login_user(username, password)
+Logs user into the system
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**username** | **String** | The user name for login | [required] |
+**password** | **String** | The password for login in clear text | [required] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/xml, application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## logout_user
+
+> logout_user()
+Logs out current logged in user session
+
+
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+[api_key](../README.md#api_key)
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+
+## update_user
+
+> update_user(username, user)
+Updated user
+
+This can only be done by the logged in user.
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**username** | **String** | name that need to be deleted | [required] |
+**user** | [**User**](User.md) | Updated user object | [required] |
+
+### Return type
+
+ (empty response body)
+
+### Authorization
+
+[api_key](../README.md#api_key)
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+

samples/client/petstore/rust/reqwest-trait/petstore/git_push.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+# ref: https://help.github.com/articles/adding-an-existing-project-to-github-using-the-command-line/
+#
+# Usage example: /bin/sh ./git_push.sh wing328 openapi-petstore-perl "minor update" "gitlab.com"
+
+git_user_id=$1
+git_repo_id=$2
+release_note=$3
+git_host=$4
+
+if [ "$git_host" = "" ]; then
+    git_host="github.com"
+    echo "[INFO] No command line input provided. Set \$git_host to $git_host"
+fi
+
+if [ "$git_user_id" = "" ]; then
+    git_user_id="GIT_USER_ID"
+    echo "[INFO] No command line input provided. Set \$git_user_id to $git_user_id"
+fi
+
+if [ "$git_repo_id" = "" ]; then
+    git_repo_id="GIT_REPO_ID"
+    echo "[INFO] No command line input provided. Set \$git_repo_id to $git_repo_id"
+fi
+
+if [ "$release_note" = "" ]; then
+    release_note="Minor update"
+    echo "[INFO] No command line input provided. Set \$release_note to $release_note"
+fi
+
+# Initialize the local directory as a Git repository
+git init
+
+# Adds the files in the local repository and stages them for commit.
+git add .
+
+# Commits the tracked changes and prepares them to be pushed to a remote repository.
+git commit -m "$release_note"
+
+# Sets the new remote
+git_remote=$(git remote)
+if [ "$git_remote" = "" ]; then # git remote not defined
+
+    if [ "$GIT_TOKEN" = "" ]; then
+        echo "[INFO] \$GIT_TOKEN (environment variable) is not set. Using the git credential in your environment."
+        git remote add origin https://${git_host}/${git_user_id}/${git_repo_id}.git
+    else
+        git remote add origin https://${git_user_id}:"${GIT_TOKEN}"@${git_host}/${git_user_id}/${git_repo_id}.git
+    fi
+
+fi
+
+git pull origin master
+
+# Pushes (Forces) the changes in the local repository up to the remote repository
+echo "Git pushing to https://${git_host}/${git_user_id}/${git_repo_id}.git"
+git push origin master 2>&1 | grep -v 'To https'

samples/client/petstore/rust/reqwest-trait/petstore/src/apis/configuration.rs

@@ -0,0 +1,51 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+
+
+#[derive(Debug, Clone)]
+pub struct Configuration {
+    pub base_path: String,
+    pub user_agent: Option<String>,
+    pub client: reqwest::Client,
+    pub basic_auth: Option<BasicAuth>,
+    pub oauth_access_token: Option<String>,
+    pub bearer_access_token: Option<String>,
+    pub api_key: Option<ApiKey>,
+}
+
+pub type BasicAuth = (String, Option<String>);
+
+#[derive(Debug, Clone)]
+pub struct ApiKey {
+    pub prefix: Option<String>,
+    pub key: String,
+}
+
+
+impl Configuration {
+    pub fn new() -> Configuration {
+        Configuration::default()
+    }
+}
+
+impl Default for Configuration {
+    fn default() -> Self {
+        Configuration {
+            base_path: "http://petstore.swagger.io/v2".to_owned(),
+            user_agent: Some("OpenAPI-Generator/1.0.0/rust".to_owned()),
+            client: reqwest::Client::new(),
+            basic_auth: None,
+            oauth_access_token: None,
+            bearer_access_token: None,
+            api_key: None,
+        }
+    }
+}

samples/client/petstore/rust/reqwest-trait/petstore/src/apis/fake_api.rs

@@ -0,0 +1,86 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+
+use async_trait::async_trait;
+#[cfg(feature = "mockall")]
+use mockall::automock;
+use reqwest;
+use std::sync::Arc;
+use serde::{Deserialize, Serialize};
+use crate::{apis::ResponseContent, models};
+use super::{Error, configuration};
+
+#[cfg_attr(feature = "mockall", automock)]
+#[async_trait]
+pub trait FakeApi: Send + Sync {
+    async fn test_nullable_required_param<'username, 'dummy_required_nullable_param, 'uppercase>(&self, username: &'username str, dummy_required_nullable_param: Option<&'dummy_required_nullable_param str>, uppercase: Option<&'uppercase str>) -> Result<(), Error<TestNullableRequiredParamError>>;
+}
+
+pub struct FakeApiClient {
+    configuration: Arc<configuration::Configuration>
+}
+
+impl FakeApiClient {
+    pub fn new(configuration: Arc<configuration::Configuration>) -> Self {
+        Self { configuration }
+    }
+}
+
+
+
+#[async_trait]
+impl FakeApi for FakeApiClient {
+    /// 
+    async fn test_nullable_required_param<'username, 'dummy_required_nullable_param, 'uppercase>(&self, username: &'username str, dummy_required_nullable_param: Option<&'dummy_required_nullable_param str>, uppercase: Option<&'uppercase str>) -> Result<(), Error<TestNullableRequiredParamError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/fake/user/{username}", local_var_configuration.base_path, username=crate::apis::urlencode(username));
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        match dummy_required_nullable_param {
+            Some(local_var_param_value) => { local_var_req_builder = local_var_req_builder.header("dummy_required_nullable_param", local_var_param_value.to_string()); },
+            None => { local_var_req_builder = local_var_req_builder.header("dummy_required_nullable_param", ""); },
+        }
+        if let Some(local_var_param_value) = uppercase {
+            local_var_req_builder = local_var_req_builder.header("UPPERCASE", local_var_param_value.to_string());
+        }
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<TestNullableRequiredParamError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+}
+
+/// struct for typed errors of method [`test_nullable_required_param`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum TestNullableRequiredParamError {
+    Status400(),
+    Status404(),
+    UnknownValue(serde_json::Value),
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/apis/mod.rs

@@ -0,0 +1,189 @@
+use std::error;
+use std::fmt;
+
+#[derive(Debug, Clone)]
+pub struct ResponseContent<T> {
+    pub status: reqwest::StatusCode,
+    pub content: String,
+    pub entity: Option<T>,
+}
+
+#[derive(Debug)]
+pub enum Error<T> {
+    Reqwest(reqwest::Error),
+    Serde(serde_json::Error),
+    Io(std::io::Error),
+    ResponseError(ResponseContent<T>),
+}
+
+impl <T> fmt::Display for Error<T> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let (module, e) = match self {
+            Error::Reqwest(e) => ("reqwest", e.to_string()),
+            Error::Serde(e) => ("serde", e.to_string()),
+            Error::Io(e) => ("IO", e.to_string()),
+            Error::ResponseError(e) => ("response", format!("status code {}", e.status)),
+        };
+        write!(f, "error in {}: {}", module, e)
+    }
+}
+
+impl <T: fmt::Debug> error::Error for Error<T> {
+    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
+        Some(match self {
+            Error::Reqwest(e) => e,
+            Error::Serde(e) => e,
+            Error::Io(e) => e,
+            Error::ResponseError(_) => return None,
+        })
+    }
+}
+
+impl <T> From<reqwest::Error> for Error<T> {
+    fn from(e: reqwest::Error) -> Self {
+        Error::Reqwest(e)
+    }
+}
+
+impl <T> From<serde_json::Error> for Error<T> {
+    fn from(e: serde_json::Error) -> Self {
+        Error::Serde(e)
+    }
+}
+
+impl <T> From<std::io::Error> for Error<T> {
+    fn from(e: std::io::Error) -> Self {
+        Error::Io(e)
+    }
+}
+
+pub fn urlencode<T: AsRef<str>>(s: T) -> String {
+    ::url::form_urlencoded::byte_serialize(s.as_ref().as_bytes()).collect()
+}
+
+pub fn parse_deep_object(prefix: &str, value: &serde_json::Value) -> Vec<(String, String)> {
+    if let serde_json::Value::Object(object) = value {
+        let mut params = vec![];
+
+        for (key, value) in object {
+            match value {
+                serde_json::Value::Object(_) => params.append(&mut parse_deep_object(
+                    &format!("{}[{}]", prefix, key),
+                    value,
+                )),
+                serde_json::Value::Array(array) => {
+                    for (i, value) in array.iter().enumerate() {
+                        params.append(&mut parse_deep_object(
+                            &format!("{}[{}][{}]", prefix, key, i),
+                            value,
+                        ));
+                    }
+                },
+                serde_json::Value::String(s) => params.push((format!("{}[{}]", prefix, key), s.clone())),
+                _ => params.push((format!("{}[{}]", prefix, key), value.to_string())),
+            }
+        }
+
+        return params;
+    }
+
+    unimplemented!("Only objects are supported with style=deepObject")
+}
+
+pub mod fake_api;
+pub mod pet_api;
+pub mod store_api;
+pub mod testing_api;
+pub mod user_api;
+
+pub mod configuration;
+
+use std::sync::Arc;
+
+pub trait Api {
+    fn fake_api(&self) -> &dyn fake_api::FakeApi;
+    fn pet_api(&self) -> &dyn pet_api::PetApi;
+    fn store_api(&self) -> &dyn store_api::StoreApi;
+    fn testing_api(&self) -> &dyn testing_api::TestingApi;
+    fn user_api(&self) -> &dyn user_api::UserApi;
+}
+
+pub struct ApiClient {
+    fake_api: Box<dyn fake_api::FakeApi>,
+    pet_api: Box<dyn pet_api::PetApi>,
+    store_api: Box<dyn store_api::StoreApi>,
+    testing_api: Box<dyn testing_api::TestingApi>,
+    user_api: Box<dyn user_api::UserApi>,
+}
+
+impl ApiClient {
+    pub fn new(configuration: Arc<configuration::Configuration>) -> Self {
+        Self {
+            fake_api: Box::new(fake_api::FakeApiClient::new(configuration.clone())),
+            pet_api: Box::new(pet_api::PetApiClient::new(configuration.clone())),
+            store_api: Box::new(store_api::StoreApiClient::new(configuration.clone())),
+            testing_api: Box::new(testing_api::TestingApiClient::new(configuration.clone())),
+            user_api: Box::new(user_api::UserApiClient::new(configuration.clone())),
+        }
+    }
+}
+
+impl Api for ApiClient {
+    fn fake_api(&self) -> &dyn fake_api::FakeApi {
+        self.fake_api.as_ref()
+    }
+    fn pet_api(&self) -> &dyn pet_api::PetApi {
+        self.pet_api.as_ref()
+    }
+    fn store_api(&self) -> &dyn store_api::StoreApi {
+        self.store_api.as_ref()
+    }
+    fn testing_api(&self) -> &dyn testing_api::TestingApi {
+        self.testing_api.as_ref()
+    }
+    fn user_api(&self) -> &dyn user_api::UserApi {
+        self.user_api.as_ref()
+    }
+}
+
+#[cfg(feature = "mockall")]
+pub struct MockApiClient {
+    pub fake_api_mock: fake_api::MockFakeApi,
+    pub pet_api_mock: pet_api::MockPetApi,
+    pub store_api_mock: store_api::MockStoreApi,
+    pub testing_api_mock: testing_api::MockTestingApi,
+    pub user_api_mock: user_api::MockUserApi,
+}
+
+#[cfg(feature = "mockall")]
+impl MockApiClient {
+    pub fn new() -> Self {
+        Self {
+            fake_api_mock: fake_api::MockFakeApi::new(),
+            pet_api_mock: pet_api::MockPetApi::new(),
+            store_api_mock: store_api::MockStoreApi::new(),
+            testing_api_mock: testing_api::MockTestingApi::new(),
+            user_api_mock: user_api::MockUserApi::new(),
+        }
+    }
+}
+
+#[cfg(feature = "mockall")]
+impl Api for MockApiClient {
+    fn fake_api(&self) -> &dyn fake_api::FakeApi {
+        &self.fake_api_mock
+    }
+    fn pet_api(&self) -> &dyn pet_api::PetApi {
+        &self.pet_api_mock
+    }
+    fn store_api(&self) -> &dyn store_api::StoreApi {
+        &self.store_api_mock
+    }
+    fn testing_api(&self) -> &dyn testing_api::TestingApi {
+        &self.testing_api_mock
+    }
+    fn user_api(&self) -> &dyn user_api::UserApi {
+        &self.user_api_mock
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/apis/pet_api.rs

@@ -0,0 +1,395 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+
+use async_trait::async_trait;
+#[cfg(feature = "mockall")]
+use mockall::automock;
+use reqwest;
+use std::sync::Arc;
+use serde::{Deserialize, Serialize};
+use crate::{apis::ResponseContent, models};
+use super::{Error, configuration};
+
+#[cfg_attr(feature = "mockall", automock)]
+#[async_trait]
+pub trait PetApi: Send + Sync {
+    async fn add_pet<'pet>(&self, pet: models::Pet) -> Result<models::Pet, Error<AddPetError>>;
+    async fn delete_pet<'pet_id, 'api_key>(&self, pet_id: i64, api_key: Option<&'api_key str>) -> Result<(), Error<DeletePetError>>;
+    async fn find_pets_by_status<'status>(&self, status: Vec<String>) -> Result<Vec<models::Pet>, Error<FindPetsByStatusError>>;
+    async fn find_pets_by_tags<'tags>(&self, tags: Vec<String>) -> Result<Vec<models::Pet>, Error<FindPetsByTagsError>>;
+    async fn get_pet_by_id<'pet_id>(&self, pet_id: i64) -> Result<models::Pet, Error<GetPetByIdError>>;
+    async fn update_pet<'pet>(&self, pet: models::Pet) -> Result<models::Pet, Error<UpdatePetError>>;
+    async fn update_pet_with_form<'pet_id, 'name, 'status>(&self, pet_id: i64, name: Option<&'name str>, status: Option<&'status str>) -> Result<(), Error<UpdatePetWithFormError>>;
+    async fn upload_file<'pet_id, 'additional_metadata, 'file>(&self, pet_id: i64, additional_metadata: Option<&'additional_metadata str>, file: Option<std::path::PathBuf>) -> Result<models::ApiResponse, Error<UploadFileError>>;
+}
+
+pub struct PetApiClient {
+    configuration: Arc<configuration::Configuration>
+}
+
+impl PetApiClient {
+    pub fn new(configuration: Arc<configuration::Configuration>) -> Self {
+        Self { configuration }
+    }
+}
+
+
+
+#[async_trait]
+impl PetApi for PetApiClient {
+    /// 
+    async fn add_pet<'pet>(&self, pet: models::Pet) -> Result<models::Pet, Error<AddPetError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/pet", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::POST, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_token) = local_var_configuration.oauth_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+        local_var_req_builder = local_var_req_builder.json(&pet);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<AddPetError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn delete_pet<'pet_id, 'api_key>(&self, pet_id: i64, api_key: Option<&'api_key str>) -> Result<(), Error<DeletePetError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/pet/{petId}", local_var_configuration.base_path, petId=pet_id);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::DELETE, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(local_var_param_value) = api_key {
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_param_value.to_string());
+        }
+        if let Some(ref local_var_token) = local_var_configuration.oauth_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<DeletePetError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// Multiple status values can be provided with comma separated strings
+    async fn find_pets_by_status<'status>(&self, status: Vec<String>) -> Result<Vec<models::Pet>, Error<FindPetsByStatusError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/pet/findByStatus", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        local_var_req_builder = match "csv" {
+            "multi" => local_var_req_builder.query(&status.into_iter().map(|p| ("status".to_owned(), p.to_string())).collect::<Vec<(std::string::String, std::string::String)>>()),
+            _ => local_var_req_builder.query(&[("status", &status.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(",").to_string())]),
+        };
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_token) = local_var_configuration.oauth_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<FindPetsByStatusError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+    async fn find_pets_by_tags<'tags>(&self, tags: Vec<String>) -> Result<Vec<models::Pet>, Error<FindPetsByTagsError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/pet/findByTags", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        local_var_req_builder = match "csv" {
+            "multi" => local_var_req_builder.query(&tags.into_iter().map(|p| ("tags".to_owned(), p.to_string())).collect::<Vec<(std::string::String, std::string::String)>>()),
+            _ => local_var_req_builder.query(&[("tags", &tags.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(",").to_string())]),
+        };
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_token) = local_var_configuration.oauth_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<FindPetsByTagsError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// Returns a single pet
+    async fn get_pet_by_id<'pet_id>(&self, pet_id: i64) -> Result<models::Pet, Error<GetPetByIdError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/pet/{petId}", local_var_configuration.base_path, petId=pet_id);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_value);
+        };
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<GetPetByIdError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn update_pet<'pet>(&self, pet: models::Pet) -> Result<models::Pet, Error<UpdatePetError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/pet", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::PUT, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_token) = local_var_configuration.oauth_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+        local_var_req_builder = local_var_req_builder.json(&pet);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<UpdatePetError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn update_pet_with_form<'pet_id, 'name, 'status>(&self, pet_id: i64, name: Option<&'name str>, status: Option<&'status str>) -> Result<(), Error<UpdatePetWithFormError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/pet/{petId}", local_var_configuration.base_path, petId=pet_id);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::POST, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_token) = local_var_configuration.oauth_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+        let mut local_var_form_params = std::collections::HashMap::new();
+        if let Some(local_var_param_value) = name {
+            local_var_form_params.insert("name", local_var_param_value.to_string());
+        }
+        if let Some(local_var_param_value) = status {
+            local_var_form_params.insert("status", local_var_param_value.to_string());
+        }
+        local_var_req_builder = local_var_req_builder.form(&local_var_form_params);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<UpdatePetWithFormError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn upload_file<'pet_id, 'additional_metadata, 'file>(&self, pet_id: i64, additional_metadata: Option<&'additional_metadata str>, file: Option<std::path::PathBuf>) -> Result<models::ApiResponse, Error<UploadFileError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/pet/{petId}/uploadImage", local_var_configuration.base_path, petId=pet_id);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::POST, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_token) = local_var_configuration.oauth_access_token {
+            local_var_req_builder = local_var_req_builder.bearer_auth(local_var_token.to_owned());
+        };
+        let mut local_var_form = reqwest::multipart::Form::new();
+        if let Some(local_var_param_value) = additional_metadata {
+            local_var_form = local_var_form.text("additionalMetadata", local_var_param_value.to_string());
+        }
+        // TODO: support file upload for 'file' parameter
+        local_var_req_builder = local_var_req_builder.multipart(local_var_form);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<UploadFileError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+}
+
+/// struct for typed errors of method [`add_pet`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum AddPetError {
+    Status405(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`delete_pet`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum DeletePetError {
+    Status400(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`find_pets_by_status`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum FindPetsByStatusError {
+    Status400(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`find_pets_by_tags`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum FindPetsByTagsError {
+    Status400(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`get_pet_by_id`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum GetPetByIdError {
+    Status400(),
+    Status404(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`update_pet`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum UpdatePetError {
+    Status400(),
+    Status404(),
+    Status405(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`update_pet_with_form`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum UpdatePetWithFormError {
+    Status405(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`upload_file`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum UploadFileError {
+    UnknownValue(serde_json::Value),
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/apis/store_api.rs

@@ -0,0 +1,199 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+
+use async_trait::async_trait;
+#[cfg(feature = "mockall")]
+use mockall::automock;
+use reqwest;
+use std::sync::Arc;
+use serde::{Deserialize, Serialize};
+use crate::{apis::ResponseContent, models};
+use super::{Error, configuration};
+
+#[cfg_attr(feature = "mockall", automock)]
+#[async_trait]
+pub trait StoreApi: Send + Sync {
+    async fn delete_order<'order_id>(&self, order_id: &'order_id str) -> Result<(), Error<DeleteOrderError>>;
+    async fn get_inventory<>(&self, ) -> Result<std::collections::HashMap<String, i32>, Error<GetInventoryError>>;
+    async fn get_order_by_id<'order_id>(&self, order_id: i64) -> Result<models::Order, Error<GetOrderByIdError>>;
+    async fn place_order<'order>(&self, order: models::Order) -> Result<models::Order, Error<PlaceOrderError>>;
+}
+
+pub struct StoreApiClient {
+    configuration: Arc<configuration::Configuration>
+}
+
+impl StoreApiClient {
+    pub fn new(configuration: Arc<configuration::Configuration>) -> Self {
+        Self { configuration }
+    }
+}
+
+
+
+#[async_trait]
+impl StoreApi for StoreApiClient {
+    /// For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors
+    async fn delete_order<'order_id>(&self, order_id: &'order_id str) -> Result<(), Error<DeleteOrderError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/store/order/{orderId}", local_var_configuration.base_path, orderId=crate::apis::urlencode(order_id));
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::DELETE, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<DeleteOrderError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// Returns a map of status codes to quantities
+    async fn get_inventory<>(&self, ) -> Result<std::collections::HashMap<String, i32>, Error<GetInventoryError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/store/inventory", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_value);
+        };
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<GetInventoryError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// For valid response try integer IDs with value <= 5 or > 10. Other values will generate exceptions
+    async fn get_order_by_id<'order_id>(&self, order_id: i64) -> Result<models::Order, Error<GetOrderByIdError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/store/order/{orderId}", local_var_configuration.base_path, orderId=order_id);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<GetOrderByIdError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn place_order<'order>(&self, order: models::Order) -> Result<models::Order, Error<PlaceOrderError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/store/order", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::POST, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        local_var_req_builder = local_var_req_builder.json(&order);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<PlaceOrderError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+}
+
+/// struct for typed errors of method [`delete_order`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum DeleteOrderError {
+    Status400(),
+    Status404(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`get_inventory`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum GetInventoryError {
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`get_order_by_id`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum GetOrderByIdError {
+    Status400(),
+    Status404(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`place_order`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum PlaceOrderError {
+    Status400(),
+    UnknownValue(serde_json::Value),
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/apis/testing_api.rs

@@ -0,0 +1,111 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+
+use async_trait::async_trait;
+#[cfg(feature = "mockall")]
+use mockall::automock;
+use reqwest;
+use std::sync::Arc;
+use serde::{Deserialize, Serialize};
+use crate::{apis::ResponseContent, models};
+use super::{Error, configuration};
+
+#[cfg_attr(feature = "mockall", automock)]
+#[async_trait]
+pub trait TestingApi: Send + Sync {
+    async fn tests_file_response_get<>(&self, ) -> Result<std::path::PathBuf, Error<TestsFileResponseGetError>>;
+    async fn tests_type_testing_get<>(&self, ) -> Result<models::TypeTesting, Error<TestsTypeTestingGetError>>;
+}
+
+pub struct TestingApiClient {
+    configuration: Arc<configuration::Configuration>
+}
+
+impl TestingApiClient {
+    pub fn new(configuration: Arc<configuration::Configuration>) -> Self {
+        Self { configuration }
+    }
+}
+
+
+
+#[async_trait]
+impl TestingApi for TestingApiClient {
+    async fn tests_file_response_get<>(&self, ) -> Result<std::path::PathBuf, Error<TestsFileResponseGetError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/tests/fileResponse", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<TestsFileResponseGetError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    async fn tests_type_testing_get<>(&self, ) -> Result<models::TypeTesting, Error<TestsTypeTestingGetError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/tests/typeTesting", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<TestsTypeTestingGetError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+}
+
+/// struct for typed errors of method [`tests_file_response_get`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum TestsFileResponseGetError {
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`tests_type_testing_get`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum TestsTypeTestingGetError {
+    UnknownValue(serde_json::Value),
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/apis/user_api.rs

@@ -0,0 +1,394 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+
+use async_trait::async_trait;
+#[cfg(feature = "mockall")]
+use mockall::automock;
+use reqwest;
+use std::sync::Arc;
+use serde::{Deserialize, Serialize};
+use crate::{apis::ResponseContent, models};
+use super::{Error, configuration};
+
+#[cfg_attr(feature = "mockall", automock)]
+#[async_trait]
+pub trait UserApi: Send + Sync {
+    async fn create_user<'user>(&self, user: models::User) -> Result<(), Error<CreateUserError>>;
+    async fn create_users_with_array_input<'user>(&self, user: Vec<models::User>) -> Result<(), Error<CreateUsersWithArrayInputError>>;
+    async fn create_users_with_list_input<'user>(&self, user: Vec<models::User>) -> Result<(), Error<CreateUsersWithListInputError>>;
+    async fn delete_user<'username>(&self, username: &'username str) -> Result<(), Error<DeleteUserError>>;
+    async fn get_user_by_name<'username>(&self, username: &'username str) -> Result<models::User, Error<GetUserByNameError>>;
+    async fn login_user<'username, 'password>(&self, username: &'username str, password: &'password str) -> Result<String, Error<LoginUserError>>;
+    async fn logout_user<>(&self, ) -> Result<(), Error<LogoutUserError>>;
+    async fn update_user<'username, 'user>(&self, username: &'username str, user: models::User) -> Result<(), Error<UpdateUserError>>;
+}
+
+pub struct UserApiClient {
+    configuration: Arc<configuration::Configuration>
+}
+
+impl UserApiClient {
+    pub fn new(configuration: Arc<configuration::Configuration>) -> Self {
+        Self { configuration }
+    }
+}
+
+
+
+#[async_trait]
+impl UserApi for UserApiClient {
+    /// This can only be done by the logged in user.
+    async fn create_user<'user>(&self, user: models::User) -> Result<(), Error<CreateUserError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/user", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::POST, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_value);
+        };
+        local_var_req_builder = local_var_req_builder.json(&user);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<CreateUserError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn create_users_with_array_input<'user>(&self, user: Vec<models::User>) -> Result<(), Error<CreateUsersWithArrayInputError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/user/createWithArray", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::POST, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_value);
+        };
+        local_var_req_builder = local_var_req_builder.json(&user);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<CreateUsersWithArrayInputError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn create_users_with_list_input<'user>(&self, user: Vec<models::User>) -> Result<(), Error<CreateUsersWithListInputError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/user/createWithList", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::POST, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_value);
+        };
+        local_var_req_builder = local_var_req_builder.json(&user);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<CreateUsersWithListInputError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// This can only be done by the logged in user.
+    async fn delete_user<'username>(&self, username: &'username str) -> Result<(), Error<DeleteUserError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/user/{username}", local_var_configuration.base_path, username=crate::apis::urlencode(username));
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::DELETE, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_value);
+        };
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<DeleteUserError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn get_user_by_name<'username>(&self, username: &'username str) -> Result<models::User, Error<GetUserByNameError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/user/{username}", local_var_configuration.base_path, username=crate::apis::urlencode(username));
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<GetUserByNameError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn login_user<'username, 'password>(&self, username: &'username str, password: &'password str) -> Result<String, Error<LoginUserError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/user/login", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        local_var_req_builder = local_var_req_builder.query(&[("username", &username.to_string())]);
+        local_var_req_builder = local_var_req_builder.query(&[("password", &password.to_string())]);
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            serde_json::from_str(&local_var_content).map_err(Error::from)
+        } else {
+            let local_var_entity: Option<LoginUserError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// 
+    async fn logout_user<>(&self, ) -> Result<(), Error<LogoutUserError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/user/logout", local_var_configuration.base_path);
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::GET, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_value);
+        };
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<LogoutUserError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+    /// This can only be done by the logged in user.
+    async fn update_user<'username, 'user>(&self, username: &'username str, user: models::User) -> Result<(), Error<UpdateUserError>> {
+        let local_var_configuration = &self.configuration;
+
+        let local_var_client = &local_var_configuration.client;
+
+        let local_var_uri_str = format!("{}/user/{username}", local_var_configuration.base_path, username=crate::apis::urlencode(username));
+        let mut local_var_req_builder = local_var_client.request(reqwest::Method::PUT, local_var_uri_str.as_str());
+
+        if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
+            local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
+        }
+        if let Some(ref local_var_apikey) = local_var_configuration.api_key {
+            let local_var_key = local_var_apikey.key.clone();
+            let local_var_value = match local_var_apikey.prefix {
+                Some(ref local_var_prefix) => format!("{} {}", local_var_prefix, local_var_key),
+                None => local_var_key,
+            };
+            local_var_req_builder = local_var_req_builder.header("api_key", local_var_value);
+        };
+        local_var_req_builder = local_var_req_builder.json(&user);
+
+        let local_var_req = local_var_req_builder.build()?;
+        let local_var_resp = local_var_client.execute(local_var_req).await?;
+
+        let local_var_status = local_var_resp.status();
+        let local_var_content = local_var_resp.text().await?;
+
+        if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
+            Ok(())
+        } else {
+            let local_var_entity: Option<UpdateUserError> = serde_json::from_str(&local_var_content).ok();
+            let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
+            Err(Error::ResponseError(local_var_error))
+        }
+    }
+
+}
+
+/// struct for typed errors of method [`create_user`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum CreateUserError {
+    DefaultResponse(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`create_users_with_array_input`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum CreateUsersWithArrayInputError {
+    DefaultResponse(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`create_users_with_list_input`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum CreateUsersWithListInputError {
+    DefaultResponse(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`delete_user`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum DeleteUserError {
+    Status400(),
+    Status404(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`get_user_by_name`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum GetUserByNameError {
+    Status400(),
+    Status404(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`login_user`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum LoginUserError {
+    Status400(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`logout_user`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum LogoutUserError {
+    DefaultResponse(),
+    UnknownValue(serde_json::Value),
+}
+
+/// struct for typed errors of method [`update_user`]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum UpdateUserError {
+    Status400(),
+    Status404(),
+    UnknownValue(serde_json::Value),
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/lib.rs

@@ -0,0 +1,10 @@
+#![allow(unused_imports)]
+#![allow(clippy::too_many_arguments)]
+
+extern crate serde_repr;
+extern crate serde;
+extern crate serde_json;
+extern crate url;
+
+pub mod apis;
+pub mod models;

samples/client/petstore/rust/reqwest-trait/petstore/src/models/action_container.rs

@@ -0,0 +1,27 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct ActionContainer {
+    #[serde(rename = "action")]
+    pub action: Box<models::Baz>,
+}
+
+impl ActionContainer {
+    pub fn new(action: models::Baz) -> ActionContainer {
+        ActionContainer {
+            action: Box::new(action),
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/api_response.rs

@@ -0,0 +1,35 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// ApiResponse : Describes the result of uploading an image resource
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct ApiResponse {
+    #[serde(rename = "code", skip_serializing_if = "Option::is_none")]
+    pub code: Option<i32>,
+    #[serde(rename = "type", skip_serializing_if = "Option::is_none")]
+    pub r#type: Option<String>,
+    #[serde(rename = "message", skip_serializing_if = "Option::is_none")]
+    pub message: Option<String>,
+}
+
+impl ApiResponse {
+    /// Describes the result of uploading an image resource
+    pub fn new() -> ApiResponse {
+        ApiResponse {
+            code: None,
+            r#type: None,
+            message: None,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/array_item_ref_test.rs

@@ -0,0 +1,32 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// ArrayItemRefTest : Test handling of object reference in arrays
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct ArrayItemRefTest {
+    #[serde(rename = "list_with_array_ref")]
+    pub list_with_array_ref: Vec<Vec<String>>,
+    #[serde(rename = "list_with_object_ref")]
+    pub list_with_object_ref: Vec<std::collections::HashMap<String, serde_json::Value>>,
+}
+
+impl ArrayItemRefTest {
+    /// Test handling of object reference in arrays
+    pub fn new(list_with_array_ref: Vec<Vec<String>>, list_with_object_ref: Vec<std::collections::HashMap<String, serde_json::Value>>) -> ArrayItemRefTest {
+        ArrayItemRefTest {
+            list_with_array_ref,
+            list_with_object_ref,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/baz.rs

@@ -0,0 +1,42 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// Baz : Test handling of empty variants
+/// Test handling of empty variants
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize, Deserialize)]
+pub enum Baz {
+    #[serde(rename = "A")]
+    A,
+    #[serde(rename = "B")]
+    B,
+    #[serde(rename = "")]
+    Empty,
+
+}
+
+impl std::fmt::Display for Baz {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::A => write!(f, "A"),
+            Self::B => write!(f, "B"),
+            Self::Empty => write!(f, ""),
+        }
+    }
+}
+
+impl Default for Baz {
+    fn default() -> Baz {
+        Self::A
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/category.rs

@@ -0,0 +1,32 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// Category : A category for a pet
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct Category {
+    #[serde(rename = "id", skip_serializing_if = "Option::is_none")]
+    pub id: Option<i64>,
+    #[serde(rename = "name", skip_serializing_if = "Option::is_none")]
+    pub name: Option<String>,
+}
+
+impl Category {
+    /// A category for a pet
+    pub fn new() -> Category {
+        Category {
+            id: None,
+            name: None,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/enum_array_testing.rs

@@ -0,0 +1,45 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// EnumArrayTesting : Test of enum array
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct EnumArrayTesting {
+    #[serde(rename = "required_enums")]
+    pub required_enums: Vec<RequiredEnums>,
+}
+
+impl EnumArrayTesting {
+    /// Test of enum array
+    pub fn new(required_enums: Vec<RequiredEnums>) -> EnumArrayTesting {
+        EnumArrayTesting {
+            required_enums,
+        }
+    }
+}
+/// 
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize, Deserialize)]
+pub enum RequiredEnums {
+    #[serde(rename = "A")]
+    A,
+    #[serde(rename = "B")]
+    B,
+    #[serde(rename = "C")]
+    C,
+}
+
+impl Default for RequiredEnums {
+    fn default() -> RequiredEnums {
+        Self::A
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/mod.rs

@@ -0,0 +1,36 @@
+pub mod action_container;
+pub use self::action_container::ActionContainer;
+pub mod api_response;
+pub use self::api_response::ApiResponse;
+pub mod array_item_ref_test;
+pub use self::array_item_ref_test::ArrayItemRefTest;
+pub mod baz;
+pub use self::baz::Baz;
+pub mod category;
+pub use self::category::Category;
+pub mod enum_array_testing;
+pub use self::enum_array_testing::EnumArrayTesting;
+pub mod nullable_array;
+pub use self::nullable_array::NullableArray;
+pub mod numeric_enum_testing;
+pub use self::numeric_enum_testing::NumericEnumTesting;
+pub mod optional_testing;
+pub use self::optional_testing::OptionalTesting;
+pub mod order;
+pub use self::order::Order;
+pub mod pet;
+pub use self::pet::Pet;
+pub mod property_test;
+pub use self::property_test::PropertyTest;
+pub mod model_ref;
+pub use self::model_ref::Ref;
+pub mod model_return;
+pub use self::model_return::Return;
+pub mod tag;
+pub use self::tag::Tag;
+pub mod type_testing;
+pub use self::type_testing::TypeTesting;
+pub mod unique_item_array_testing;
+pub use self::unique_item_array_testing::UniqueItemArrayTesting;
+pub mod user;
+pub use self::user::User;

samples/client/petstore/rust/reqwest-trait/petstore/src/models/model_ref.rs

@@ -0,0 +1,29 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// Ref : using reserved word as model name
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct Ref {
+    #[serde(rename = "dummy", skip_serializing_if = "Option::is_none")]
+    pub dummy: Option<String>,
+}
+
+impl Ref {
+    /// using reserved word as model name
+    pub fn new() -> Ref {
+        Ref {
+            dummy: None,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/model_return.rs

@@ -0,0 +1,35 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// Return : Test using keywords
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct Return {
+    #[serde(rename = "match", skip_serializing_if = "Option::is_none")]
+    pub r#match: Option<i32>,
+    #[serde(rename = "async", skip_serializing_if = "Option::is_none")]
+    pub r#async: Option<bool>,
+    #[serde(rename = "super", skip_serializing_if = "Option::is_none")]
+    pub param_super: Option<bool>,
+}
+
+impl Return {
+    /// Test using keywords
+    pub fn new() -> Return {
+        Return {
+            r#match: None,
+            r#async: None,
+            param_super: None,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/nullable_array.rs

@@ -0,0 +1,36 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct NullableArray {
+    #[serde(rename = "array_nullable", default, with = "::serde_with::rust::double_option", skip_serializing_if = "Option::is_none")]
+    pub array_nullable: Option<Option<Vec<String>>>,
+    #[serde(rename = "just_array", skip_serializing_if = "Option::is_none")]
+    pub just_array: Option<Vec<String>>,
+    #[serde(rename = "nullable_string", default, with = "::serde_with::rust::double_option", skip_serializing_if = "Option::is_none")]
+    pub nullable_string: Option<Option<String>>,
+    #[serde(rename = "just_string", skip_serializing_if = "Option::is_none")]
+    pub just_string: Option<String>,
+}
+
+impl NullableArray {
+    pub fn new() -> NullableArray {
+        NullableArray {
+            array_nullable: None,
+            just_array: None,
+            nullable_string: None,
+            just_string: None,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/numeric_enum_testing.rs

@@ -0,0 +1,42 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+use serde_repr::{Serialize_repr,Deserialize_repr};
+/// NumericEnumTesting : testing that numeric enums are converted correctly
+/// testing that numeric enums are converted correctly
+#[repr(i64)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize_repr, Deserialize_repr)]
+pub enum NumericEnumTesting {
+    Variant0 = 0,
+    Variant1 = 1,
+    Variant2 = 2,
+    Variant3 = 3,
+
+}
+
+impl std::fmt::Display for NumericEnumTesting {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", match self {
+            Self::Variant0 => "0",
+            Self::Variant1 => "1",
+            Self::Variant2 => "2",
+            Self::Variant3 => "3",
+        })
+    }
+}
+impl Default for NumericEnumTesting {
+    fn default() -> NumericEnumTesting {
+        Self::Variant0
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/optional_testing.rs

@@ -0,0 +1,38 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// OptionalTesting : Test handling of optional and nullable fields
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct OptionalTesting {
+    #[serde(rename = "optional_nonnull", skip_serializing_if = "Option::is_none")]
+    pub optional_nonnull: Option<String>,
+    #[serde(rename = "required_nonnull")]
+    pub required_nonnull: String,
+    #[serde(rename = "optional_nullable", default, with = "::serde_with::rust::double_option", skip_serializing_if = "Option::is_none")]
+    pub optional_nullable: Option<Option<String>>,
+    #[serde(rename = "required_nullable", deserialize_with = "Option::deserialize")]
+    pub required_nullable: Option<String>,
+}
+
+impl OptionalTesting {
+    /// Test handling of optional and nullable fields
+    pub fn new(required_nonnull: String, required_nullable: Option<String>) -> OptionalTesting {
+        OptionalTesting {
+            optional_nonnull: None,
+            required_nonnull,
+            optional_nullable: None,
+            required_nullable,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/order.rs

@@ -0,0 +1,61 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// Order : An order for a pets from the pet store
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct Order {
+    #[serde(rename = "id", skip_serializing_if = "Option::is_none")]
+    pub id: Option<i64>,
+    #[serde(rename = "petId", skip_serializing_if = "Option::is_none")]
+    pub pet_id: Option<i64>,
+    #[serde(rename = "quantity", skip_serializing_if = "Option::is_none")]
+    pub quantity: Option<i32>,
+    #[serde(rename = "shipDate", skip_serializing_if = "Option::is_none")]
+    pub ship_date: Option<String>,
+    /// Order Status
+    #[serde(rename = "status", skip_serializing_if = "Option::is_none")]
+    pub status: Option<Status>,
+    #[serde(rename = "complete", skip_serializing_if = "Option::is_none")]
+    pub complete: Option<bool>,
+}
+
+impl Order {
+    /// An order for a pets from the pet store
+    pub fn new() -> Order {
+        Order {
+            id: None,
+            pet_id: None,
+            quantity: None,
+            ship_date: None,
+            status: None,
+            complete: None,
+        }
+    }
+}
+/// Order Status
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize, Deserialize)]
+pub enum Status {
+    #[serde(rename = "placed")]
+    Placed,
+    #[serde(rename = "approved")]
+    Approved,
+    #[serde(rename = "delivered")]
+    shipped,
+}
+
+impl Default for Status {
+    fn default() -> Status {
+        Self::Placed
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/pet.rs

@@ -0,0 +1,61 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// Pet : A pet for sale in the pet store
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct Pet {
+    #[serde(rename = "id", skip_serializing_if = "Option::is_none")]
+    pub id: Option<i64>,
+    #[serde(rename = "category", skip_serializing_if = "Option::is_none")]
+    pub category: Option<Box<models::Category>>,
+    #[serde(rename = "name")]
+    pub name: String,
+    #[serde(rename = "photoUrls")]
+    pub photo_urls: Vec<String>,
+    #[serde(rename = "tags", skip_serializing_if = "Option::is_none")]
+    pub tags: Option<Vec<models::Tag>>,
+    /// pet status in the store
+    #[serde(rename = "status", skip_serializing_if = "Option::is_none")]
+    pub status: Option<Status>,
+}
+
+impl Pet {
+    /// A pet for sale in the pet store
+    pub fn new(name: String, photo_urls: Vec<String>) -> Pet {
+        Pet {
+            id: None,
+            category: None,
+            name,
+            photo_urls,
+            tags: None,
+            status: None,
+        }
+    }
+}
+/// pet status in the store
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize, Deserialize)]
+pub enum Status {
+    #[serde(rename = "available")]
+    Available,
+    #[serde(rename = "pending")]
+    Pending,
+    #[serde(rename = "sold")]
+    Sold,
+}
+
+impl Default for Status {
+    fn default() -> Status {
+        Self::Available
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/property_test.rs

@@ -0,0 +1,29 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// PropertyTest : A model to test various formats, e.g. UUID
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct PropertyTest {
+    #[serde(rename = "uuid", skip_serializing_if = "Option::is_none")]
+    pub uuid: Option<uuid::Uuid>,
+}
+
+impl PropertyTest {
+    /// A model to test various formats, e.g. UUID
+    pub fn new() -> PropertyTest {
+        PropertyTest {
+            uuid: None,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/tag.rs

@@ -0,0 +1,32 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// Tag : A tag for a pet
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct Tag {
+    #[serde(rename = "id", skip_serializing_if = "Option::is_none")]
+    pub id: Option<i64>,
+    #[serde(rename = "name", skip_serializing_if = "Option::is_none")]
+    pub name: Option<String>,
+}
+
+impl Tag {
+    /// A tag for a pet
+    pub fn new() -> Tag {
+        Tag {
+            id: None,
+            name: None,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/type_testing.rs

@@ -0,0 +1,54 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+use serde_with::serde_as;
+
+/// TypeTesting : Test handling of different field data types
+#[serde_as]
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct TypeTesting {
+    #[serde(rename = "int32")]
+    pub int32: i32,
+    #[serde(rename = "int64")]
+    pub int64: i64,
+    #[serde(rename = "float")]
+    pub float: f32,
+    #[serde(rename = "double")]
+    pub double: f64,
+    #[serde(rename = "string")]
+    pub string: String,
+    #[serde(rename = "boolean")]
+    pub boolean: bool,
+    #[serde(rename = "uuid")]
+    pub uuid: uuid::Uuid,
+    #[serde_as(as = "serde_with::base64::Base64")]
+    #[serde(rename = "bytes")]
+    pub bytes: Vec<u8>,
+}
+
+impl TypeTesting {
+    /// Test handling of different field data types
+    pub fn new(int32: i32, int64: i64, float: f32, double: f64, string: String, boolean: bool, uuid: uuid::Uuid, bytes: Vec<u8>) -> TypeTesting {
+        TypeTesting {
+            int32,
+            int64,
+            float,
+            double,
+            string,
+            boolean,
+            uuid,
+            bytes,
+        }
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/unique_item_array_testing.rs

@@ -0,0 +1,46 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// UniqueItemArrayTesting : Test handling of enum array with unique items
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct UniqueItemArrayTesting {
+    /// Helper object for the unique item array test
+    #[serde(rename = "unique_item_array")]
+    pub unique_item_array: std::collections::HashSet<UniqueItemArray>,
+}
+
+impl UniqueItemArrayTesting {
+    /// Test handling of enum array with unique items
+    pub fn new(unique_item_array: std::collections::HashSet<UniqueItemArray>) -> UniqueItemArrayTesting {
+        UniqueItemArrayTesting {
+            unique_item_array,
+        }
+    }
+}
+/// Helper object for the unique item array test
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize, Deserialize)]
+pub enum UniqueItemArray {
+    #[serde(rename = "unique_item_1")]
+    Variant1,
+    #[serde(rename = "unique_item_2")]
+    Variant2,
+    #[serde(rename = "unique_item_3")]
+    Variant3,
+}
+
+impl Default for UniqueItemArray {
+    fn default() -> UniqueItemArray {
+        Self::Variant1
+    }
+}
+

samples/client/petstore/rust/reqwest-trait/petstore/src/models/user.rs

@@ -0,0 +1,51 @@
+/*
+ * 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.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ */
+
+use crate::models;
+use serde::{Deserialize, Serialize};
+
+/// User : A User who is purchasing from the pet store
+#[derive(Clone, Default, Debug, PartialEq, Serialize, Deserialize)]
+pub struct User {
+    #[serde(rename = "id", skip_serializing_if = "Option::is_none")]
+    pub id: Option<i64>,
+    #[serde(rename = "username")]
+    pub username: String,
+    #[serde(rename = "firstName", skip_serializing_if = "Option::is_none")]
+    pub first_name: Option<String>,
+    #[serde(rename = "lastName")]
+    pub last_name: String,
+    #[serde(rename = "email", skip_serializing_if = "Option::is_none")]
+    pub email: Option<String>,
+    #[serde(rename = "password", skip_serializing_if = "Option::is_none")]
+    pub password: Option<String>,
+    #[serde(rename = "phone", skip_serializing_if = "Option::is_none")]
+    pub phone: Option<String>,
+    /// User Status
+    #[serde(rename = "userStatus", skip_serializing_if = "Option::is_none")]
+    pub user_status: Option<i32>,
+}
+
+impl User {
+    /// A User who is purchasing from the pet store
+    pub fn new(username: String, last_name: String) -> User {
+        User {
+            id: None,
+            username,
+            first_name: None,
+            last_name,
+            email: None,
+            password: None,
+            phone: None,
+            user_status: None,
+        }
+    }
+}
+