[Rust] Support for withAWSV4Signature option (#11690)

* [rust] add support for withAWSV4Signature option in reqwest (#11193) Signed-off-by: Jérôme Jutteau <jerome.jutteau@outscale.com> * [rust] add petstore sample for withAWSV4Signature option for reqwest (#11193) Signed-off-by: Jérôme Jutteau <jerome.jutteau@outscale.com> * [rust] update all samples (#11193) Signed-off-by: Jérôme Jutteau <jerome.jutteau@outscale.com>
2022-03-01 18:20:58 +01:00 · 2022-03-01 18:20:58 +01:00 · 21f649e087
commit 21f649e087
parent 1b6ab63953
40 changed files with 2654 additions and 0 deletions
--- a/bin/configs/rust-reqwest-petstore-awsv4signature.yaml
+++ b/bin/configs/rust-reqwest-petstore-awsv4signature.yaml
@ -0,0 +1,9 @@
+generatorName: rust
+outputDir: samples/client/petstore/rust/reqwest/petstore-awsv4signature
+library: reqwest
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/rust
+additionalProperties:
+  supportAsync: false
+  packageName: petstore-reqwest-awsv4signature
+  withAWSV4Signature: true
--- a/docs/generators/rust.md
+++ b/docs/generators/rust.md
@ -26,6 +26,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |supportAsync|If set, generate async function call instead. This option is for 'reqwest' library only| |true|
 |supportMultipleResponses|If set, return type wraps an enum of all possible 2xx schemas. This option is for 'reqwest' 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|

 ## IMPORT MAPPING

--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java
@ -40,6 +40,7 @@ public class RustClientCodegen extends DefaultCodegen implements CodegenConfig {
    private boolean useSingleRequestParameter = false;
    private boolean supportAsync = true;
    private boolean supportMultipleResponses = false;
+    private boolean withAWSV4Signature = false;

    public static final String PACKAGE_NAME = "packageName";
    public static final String PACKAGE_VERSION = "packageVersion";
@ -181,6 +182,8 @@ public class RustClientCodegen extends DefaultCodegen implements CodegenConfig {
        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)
            .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)
+		       .defaultValue(Boolean.FALSE.toString()));

        supportedLibraries.put(HYPER_LIBRARY, "HTTP client: Hyper.");
        supportedLibraries.put(REQWEST_LIBRARY, "HTTP client: Reqwest.");
@ -249,6 +252,10 @@ public class RustClientCodegen extends DefaultCodegen implements CodegenConfig {
    public void processOpts() {
        super.processOpts();

+	if (additionalProperties.containsKey(CodegenConstants.WITH_AWSV4_SIGNATURE_COMMENT)) {
+	    withAWSV4Signature = Boolean.parseBoolean(additionalProperties.get(CodegenConstants.WITH_AWSV4_SIGNATURE_COMMENT).toString());
+	}
+
        if (additionalProperties.containsKey(CodegenConstants.ENUM_NAME_SUFFIX)) {
            enumSuffix = additionalProperties.get(CodegenConstants.ENUM_NAME_SUFFIX).toString();
        }
--- a/modules/openapi-generator/src/main/resources/rust/Cargo.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/Cargo.mustache
@ -27,6 +27,11 @@ version = "^0.11"
 features = ["json", "multipart"]
 {{/supportAsync}}
 {{/reqwest}}
+{{#withAWSV4Signature}}
+aws-sigv4 = "0.3.0"
+http = "0.2.5"
+secrecy = "0.8.0"
+{{/withAWSV4Signature}}

 [dev-dependencies]
 {{#hyper}}
--- a/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache
@ -141,6 +141,30 @@ pub {{#supportAsync}}async {{/supportAsync}}fn {{{operationId}}}(configuration:
    {{/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());
    }
--- a/modules/openapi-generator/src/main/resources/rust/reqwest/api_mod.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/reqwest/api_mod.mustache
@ -1,5 +1,8 @@
 use std::error;
 use std::fmt;
+{{#withAWSV4Signature}}
+use aws_sigv4;
+{{/withAWSV4Signature}}

 #[derive(Debug, Clone)]
 pub struct ResponseContent<T> {
@ -14,6 +17,9 @@ pub enum Error<T> {
    Serde(serde_json::Error),
    Io(std::io::Error),
    ResponseError(ResponseContent<T>),
+    {{#withAWSV4Signature}}
+    AWSV4SignatureError(aws_sigv4::http_request::Error),
+    {{/withAWSV4Signature}}
 }

 impl <T> fmt::Display for Error<T> {
@ -23,6 +29,9 @@ impl <T> fmt::Display for Error<T> {
            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}}
        };
        write!(f, "error in {}: {}", module, e)
    }
@ -35,6 +44,9 @@ impl <T: fmt::Debug> error::Error for Error<T> {
            Error::Serde(e) => e,
            Error::Io(e) => e,
            Error::ResponseError(_) => return None,
+	    {{#withAWSV4Signature}}
+	    Error::AWSV4SignatureError(_) => return None,
+	    {{/withAWSV4Signature}}
        })
    }
 }
--- a/modules/openapi-generator/src/main/resources/rust/reqwest/configuration.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/reqwest/configuration.mustache
@ -2,6 +2,13 @@

 use reqwest;

+{{#withAWSV4Signature}}
+use std::time::SystemTime;
+use aws_sigv4::http_request::{sign, SigningSettings, SigningParams, SignableRequest};
+use http;
+use secrecy::{SecretString, ExposeSecret};
+{{/withAWSV4Signature}}
+
 #[derive(Debug, Clone)]
 pub struct Configuration {
    pub base_path: String,
@ -11,6 +18,9 @@ pub struct Configuration {
    pub oauth_access_token: Option<String>,
    pub bearer_access_token: Option<String>,
    pub api_key: Option<ApiKey>,
+    {{#withAWSV4Signature}}
+    pub aws_v4_key: Option<AWSv4Key>,
+    {{/withAWSV4Signature}}
    // TODO: take an oauth2 token source, similar to the go one
 }

@ -22,6 +32,45 @@ pub struct ApiKey {
    pub key: String,
 }

+{{#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()));
+            }
+        }
+	return Ok(additional_headers);
+    }
+}
+{{/withAWSV4Signature}}
+
 impl Configuration {
    pub fn new() -> Configuration {
        Configuration::default()
@ -38,6 +87,7 @@ impl Default for Configuration {
            oauth_access_token: None,
            bearer_access_token: None,
            api_key: None,
+{{#withAWSV4Signature}}            aws_v4_key: None,{{/withAWSV4Signature}}
        }
    }
 }
--- a/samples/client/petstore/rust/reqwest/petstore-async/src/apis/configuration.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-async/src/apis/configuration.rs
@ -11,6 +11,7 @@

 use reqwest;

+
 #[derive(Debug, Clone)]
 pub struct Configuration {
    pub base_path: String,
@ -31,6 +32,7 @@ pub struct ApiKey {
    pub key: String,
 }

+
 impl Configuration {
    pub fn new() -> Configuration {
        Configuration::default()
@ -47,6 +49,7 @@ impl Default for Configuration {
            oauth_access_token: None,
            bearer_access_token: None,
            api_key: None,
+
        }
    }
 }
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.gitignore
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.gitignore
@ -0,0 +1,3 @@
+/target/
+**/*.rs.bk
+Cargo.lock
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.openapi-generator-ignore
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.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
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.openapi-generator/FILES
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.openapi-generator/FILES
@ -0,0 +1,27 @@
+.gitignore
+.travis.yml
+Cargo.toml
+README.md
+docs/ApiResponse.md
+docs/Category.md
+docs/Order.md
+docs/Pet.md
+docs/PetApi.md
+docs/StoreApi.md
+docs/Tag.md
+docs/User.md
+docs/UserApi.md
+git_push.sh
+src/apis/configuration.rs
+src/apis/mod.rs
+src/apis/pet_api.rs
+src/apis/store_api.rs
+src/apis/user_api.rs
+src/lib.rs
+src/models/api_response.rs
+src/models/category.rs
+src/models/mod.rs
+src/models/order.rs
+src/models/pet.rs
+src/models/tag.rs
+src/models/user.rs
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.openapi-generator/VERSION
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.openapi-generator/VERSION
@ -0,0 +1 @@
+6.0.0-SNAPSHOT
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.travis.yml
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/.travis.yml
@ -0,0 +1 @@
+language: rust
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/Cargo.toml
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/Cargo.toml
@ -0,0 +1,17 @@
+[package]
+name = "petstore-reqwest-awsv4signature"
+version = "1.0.0"
+authors = ["OpenAPI Generator team and contributors"]
+edition = "2018"
+
+[dependencies]
+serde = "^1.0"
+serde_derive = "^1.0"
+serde_json = "^1.0"
+url = "^2.2"
+reqwest = "~0.9"
+aws-sigv4 = "0.3.0"
+http = "0.2.5"
+secrecy = "0.8.0"
+
+[dev-dependencies]
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/README.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/README.md
@ -0,0 +1,69 @@
+# Rust API client for petstore-reqwest-awsv4signature
+
+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
+- Build package: `org.openapitools.codegen.languages.RustClientCodegen`
+
+## Installation
+
+Put the package under your project folder in a directory named `petstore-reqwest-awsv4signature` and add the following to `Cargo.toml` under `[dependencies]`:
+
+```
+petstore-reqwest-awsv4signature = { path = "./petstore-reqwest-awsv4signature" }
+```
+
+## Documentation for API Endpoints
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*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
+*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
+
+ - [ApiResponse](docs/ApiResponse.md)
+ - [Category](docs/Category.md)
+ - [Order](docs/Order.md)
+ - [Pet](docs/Pet.md)
+ - [Tag](docs/Tag.md)
+ - [User](docs/User.md)
+
+
+To get access to the crate's generated documentation, use:
+
+```
+cargo doc --open
+```
+
+## Author
+
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/ApiResponse.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/ApiResponse.md
@ -0,0 +1,13 @@
+# ApiResponse
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**code** | Option<**i32**> |  | [optional]
+**_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)
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/Category.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/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)
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/Order.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/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)
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/Pet.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/Pet.md
@ -0,0 +1,16 @@
+# Pet
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | Option<**i64**> |  | [optional]
+**category** | Option<[**crate::models::Category**](Category.md)> |  | [optional]
+**name** | **String** |  | 
+**photo_urls** | **Vec<String>** |  | 
+**tags** | Option<[**Vec<crate::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)
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/PetApi.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/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
+
+> crate::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
+
+[**crate::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<crate::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<crate::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<crate::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<crate::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
+
+> crate::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
+
+[**crate::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
+
+> crate::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
+
+[**crate::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
+
+> crate::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
+
+[**crate::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)
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/StoreApi.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/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
+
+> crate::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 generated exceptions
+
+### Parameters
+
+
+Name | Type | Description  | Required | Notes
+------------- | ------------- | ------------- | ------------- | -------------
+**order_id** | **i64** | ID of pet that needs to be fetched | [required] |
+
+### Return type
+
+[**crate::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
+
+> crate::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
+
+[**crate::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)
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/Tag.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/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)
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/User.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/User.md
@ -0,0 +1,18 @@
+# User
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | Option<**i64**> |  | [optional]
+**username** | Option<**String**> |  | [optional]
+**first_name** | Option<**String**> |  | [optional]
+**last_name** | Option<**String**> |  | [optional]
+**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)
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/docs/UserApi.md
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/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<crate::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<crate::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
+
+> crate::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
+
+[**crate::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)
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/git_push.sh
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/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'
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/pom.xml
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/pom.xml
@ -0,0 +1,46 @@
+<project>
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.openapitools</groupId>
+    <artifactId>RustReqwestAWSV4SignatureClientTests</artifactId>
+    <packaging>pom</packaging>
+    <version>1.0-SNAPSHOT</version>
+    <name>Rust Reqwest AWSV4Signature Petstore Client</name>
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>${project.build.directory}</outputDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>1.2.1</version>
+                <executions>
+                    <execution>
+                        <id>bundle-test</id>
+                        <phase>integration-test</phase>
+                        <goals>
+                            <goal>exec</goal>
+                        </goals>
+                        <configuration>
+                            <executable>cargo</executable>
+                            <arguments>
+                                <argument>build</argument>
+                            </arguments>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/configuration.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/configuration.rs
@ -0,0 +1,96 @@
+/*
+ * 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 reqwest;
+
+use std::time::SystemTime;
+use aws_sigv4::http_request::{sign, SigningSettings, SigningParams, SignableRequest};
+use http;
+use secrecy::{SecretString, ExposeSecret};
+
+#[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 aws_v4_key: Option<AWSv4Key>,
+    // TODO: take an oauth2 token source, similar to the go one
+}
+
+pub type BasicAuth = (String, Option<String>);
+
+#[derive(Debug, Clone)]
+pub struct ApiKey {
+    pub prefix: Option<String>,
+    pub key: String,
+}
+
+#[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()));
+            }
+        }
+	return Ok(additional_headers);
+    }
+}
+
+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,
+            aws_v4_key: None,
+        }
+    }
+}
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/mod.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/mod.rs
@ -0,0 +1,72 @@
+use std::error;
+use std::fmt;
+use aws_sigv4;
+
+#[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>),
+    AWSV4SignatureError(aws_sigv4::http_request::Error),
+}
+
+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)),
+            Error::AWSV4SignatureError(e) => ("aws v4 signature", e.to_string()),
+        };
+        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,
+	    Error::AWSV4SignatureError(_) => 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 mod pet_api;
+pub mod store_api;
+pub mod user_api;
+
+pub mod configuration;
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/pet_api.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/pet_api.rs
@ -0,0 +1,470 @@
+/*
+ * 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 reqwest;
+
+use crate::apis::ResponseContent;
+use super::{Error, configuration};
+
+
+/// 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),
+}
+
+
+/// 
+pub fn add_pet(configuration: &configuration::Configuration, pet: crate::models::Pet) -> Result<crate::models::Pet, Error<AddPetError>> {
+    let local_var_configuration = 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_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,
+	    "POST",
+	    &serde_json::to_string(&pet).expect("param should serialize to string"),
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn delete_pet(configuration: &configuration::Configuration, pet_id: i64, api_key: Option<&str>) -> Result<(), Error<DeletePetError>> {
+    let local_var_configuration = 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_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,
+	    "DELETE",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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
+pub fn find_pets_by_status(configuration: &configuration::Configuration, status: Vec<String>) -> Result<Vec<crate::models::Pet>, Error<FindPetsByStatusError>> {
+    let local_var_configuration = 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)).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_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,
+	    "GET",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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.
+pub fn find_pets_by_tags(configuration: &configuration::Configuration, tags: Vec<String>) -> Result<Vec<crate::models::Pet>, Error<FindPetsByTagsError>> {
+    let local_var_configuration = 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)).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_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,
+	    "GET",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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
+pub fn get_pet_by_id(configuration: &configuration::Configuration, pet_id: i64) -> Result<crate::models::Pet, Error<GetPetByIdError>> {
+    let local_var_configuration = 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_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,
+	    "GET",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn update_pet(configuration: &configuration::Configuration, pet: crate::models::Pet) -> Result<crate::models::Pet, Error<UpdatePetError>> {
+    let local_var_configuration = 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_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,
+	    "PUT",
+	    &serde_json::to_string(&pet).expect("param should serialize to string"),
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn update_pet_with_form(configuration: &configuration::Configuration, pet_id: i64, name: Option<&str>, status: Option<&str>) -> Result<(), Error<UpdatePetWithFormError>> {
+    let local_var_configuration = 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_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,
+	    "POST",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn upload_file(configuration: &configuration::Configuration, pet_id: i64, additional_metadata: Option<&str>, file: Option<std::path::PathBuf>) -> Result<crate::models::ApiResponse, Error<UploadFileError>> {
+    let local_var_configuration = 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_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,
+	    "POST",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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());
+    }
+    if let Some(local_var_param_value) = file {
+        local_var_form = local_var_form.file("file", local_var_param_value)?;
+    }
+    local_var_req_builder = local_var_req_builder.multipart(local_var_form);
+
+    let local_var_req = local_var_req_builder.build()?;
+    let mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/store_api.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/store_api.rs
@ -0,0 +1,185 @@
+/*
+ * 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 reqwest;
+
+use crate::apis::ResponseContent;
+use super::{Error, configuration};
+
+
+/// 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),
+}
+
+
+/// For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors
+pub fn delete_order(configuration: &configuration::Configuration, order_id: &str) -> Result<(), Error<DeleteOrderError>> {
+    let local_var_configuration = 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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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
+pub fn get_inventory(configuration: &configuration::Configuration, ) -> Result<::std::collections::HashMap<String, i32>, Error<GetInventoryError>> {
+    let local_var_configuration = 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_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,
+	    "GET",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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 generated exceptions
+pub fn get_order_by_id(configuration: &configuration::Configuration, order_id: i64) -> Result<crate::models::Order, Error<GetOrderByIdError>> {
+    let local_var_configuration = 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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn place_order(configuration: &configuration::Configuration, order: crate::models::Order) -> Result<crate::models::Order, Error<PlaceOrderError>> {
+    let local_var_configuration = 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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/user_api.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/apis/user_api.rs
@ -0,0 +1,441 @@
+/*
+ * 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 reqwest;
+
+use crate::apis::ResponseContent;
+use super::{Error, configuration};
+
+
+/// 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),
+}
+
+
+/// This can only be done by the logged in user.
+pub fn create_user(configuration: &configuration::Configuration, user: crate::models::User) -> Result<(), Error<CreateUserError>> {
+    let local_var_configuration = 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_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,
+	    "POST",
+	    &serde_json::to_string(&user).expect("param should serialize to string"),
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn create_users_with_array_input(configuration: &configuration::Configuration, user: Vec<crate::models::User>) -> Result<(), Error<CreateUsersWithArrayInputError>> {
+    let local_var_configuration = 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_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,
+	    "POST",
+	    &serde_json::to_string(&user).expect("param should serialize to string"),
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn create_users_with_list_input(configuration: &configuration::Configuration, user: Vec<crate::models::User>) -> Result<(), Error<CreateUsersWithListInputError>> {
+    let local_var_configuration = 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_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,
+	    "POST",
+	    &serde_json::to_string(&user).expect("param should serialize to string"),
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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.
+pub fn delete_user(configuration: &configuration::Configuration, username: &str) -> Result<(), Error<DeleteUserError>> {
+    let local_var_configuration = 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_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,
+	    "DELETE",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn get_user_by_name(configuration: &configuration::Configuration, username: &str) -> Result<crate::models::User, Error<GetUserByNameError>> {
+    let local_var_configuration = 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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn login_user(configuration: &configuration::Configuration, username: &str, password: &str) -> Result<String, Error<LoginUserError>> {
+    let local_var_configuration = 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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
+/// 
+pub fn logout_user(configuration: &configuration::Configuration, ) -> Result<(), Error<LogoutUserError>> {
+    let local_var_configuration = 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_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,
+	    "GET",
+	    &"",
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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.
+pub fn update_user(configuration: &configuration::Configuration, username: &str, user: crate::models::User) -> Result<(), Error<UpdateUserError>> {
+    let local_var_configuration = 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_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,
+	    "PUT",
+	    &serde_json::to_string(&user).expect("param should serialize to string"),
+	    ) {
+	      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());
+	}
+    }
+    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 mut local_var_resp = local_var_client.execute(local_var_req)?;
+
+    let local_var_status = local_var_resp.status();
+    let local_var_content = local_var_resp.text()?;
+
+    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))
+    }
+}
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/lib.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/lib.rs
@ -0,0 +1,10 @@
+#[macro_use]
+extern crate serde_derive;
+
+extern crate serde;
+extern crate serde_json;
+extern crate url;
+extern crate reqwest;
+
+pub mod apis;
+pub mod models;
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/api_response.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/api_response.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
+ */
+
+/// ApiResponse : Describes the result of uploading an image resource
+
+
+
+#[derive(Clone, Debug, PartialEq, Default, 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 _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,
+            _type: None,
+            message: None,
+        }
+    }
+}
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/category.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/category.rs
@ -0,0 +1,33 @@
+/*
+ * 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
+ */
+
+/// Category : A category for a pet
+
+
+
+#[derive(Clone, Debug, PartialEq, Default, 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,
+        }
+    }
+}
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/mod.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/mod.rs
@ -0,0 +1,12 @@
+pub mod api_response;
+pub use self::api_response::ApiResponse;
+pub mod category;
+pub use self::category::Category;
+pub mod order;
+pub use self::order::Order;
+pub mod pet;
+pub use self::pet::Pet;
+pub mod tag;
+pub use self::tag::Tag;
+pub mod user;
+pub use self::user::User;
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/order.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/order.rs
@ -0,0 +1,62 @@
+/*
+ * 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
+ */
+
+/// Order : An order for a pets from the pet store
+
+
+
+#[derive(Clone, Debug, PartialEq, Default, 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")]
+    Delivered,
+}
+
+impl Default for Status {
+    fn default() -> Status {
+        Self::Placed
+    }
+}
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/pet.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/pet.rs
@ -0,0 +1,62 @@
+/*
+ * 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
+ */
+
+/// Pet : A pet for sale in the pet store
+
+
+
+#[derive(Clone, Debug, PartialEq, Default, 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<crate::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<crate::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
+    }
+}
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/tag.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/tag.rs
@ -0,0 +1,33 @@
+/*
+ * 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
+ */
+
+/// Tag : A tag for a pet
+
+
+
+#[derive(Clone, Debug, PartialEq, Default, 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,
+        }
+    }
+}
+
+
--- a/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/user.rs
+++ b/samples/client/petstore/rust/reqwest/petstore-awsv4signature/src/models/user.rs
@ -0,0 +1,52 @@
+/*
+ * 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
+ */
+
+/// User : A User who is purchasing from the pet store
+
+
+
+#[derive(Clone, Debug, PartialEq, Default, Serialize, Deserialize)]
+pub struct User {
+    #[serde(rename = "id", skip_serializing_if = "Option::is_none")]
+    pub id: Option<i64>,
+    #[serde(rename = "username", skip_serializing_if = "Option::is_none")]
+    pub username: Option<String>,
+    #[serde(rename = "firstName", skip_serializing_if = "Option::is_none")]
+    pub first_name: Option<String>,
+    #[serde(rename = "lastName", skip_serializing_if = "Option::is_none")]
+    pub last_name: Option<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() -> User {
+        User {
+            id: None,
+            username: None,
+            first_name: None,
+            last_name: None,
+            email: None,
+            password: None,
+            phone: None,
+            user_status: None,
+        }
+    }
+}
+
+
--- a/samples/client/petstore/rust/reqwest/petstore/src/apis/configuration.rs
+++ b/samples/client/petstore/rust/reqwest/petstore/src/apis/configuration.rs
@ -11,6 +11,7 @@

 use reqwest;

+
 #[derive(Debug, Clone)]
 pub struct Configuration {
    pub base_path: String,
@ -31,6 +32,7 @@ pub struct ApiKey {
    pub key: String,
 }

+
 impl Configuration {
    pub fn new() -> Configuration {
        Configuration::default()
@ -47,6 +49,7 @@ impl Default for Configuration {
            oauth_access_token: None,
            bearer_access_token: None,
            api_key: None,
+
        }
    }
 }