Adding proxy support for token_from_code and token_from_refersh methods

Author: glukacsycisco

Release/include/cpprest/oauth2.h

@@ -446,6 +446,24 @@ class oauth2_config
     /// Default: "access_token".
     /// </summary>
     void set_access_token_key(utility::string_t access_token_key) { m_access_token_key = std::move(access_token_key); }
+	
+	/// <summary>
+	/// Get the web proxy object
+	/// </summary>
+	/// <returns>A reference to the web proxy object.</returns>
+	const web_proxy& proxy() const
+	{
+		return m_proxy;
+	}
+
+	/// <summary>
+	/// Set the web proxy object that will be used by token_from_code and token_from_refresh
+	/// </summary>
+	/// <param name="proxy">A reference to the web proxy object.</param>
+	void set_proxy(const web_proxy& proxy)
+	{
+		m_proxy = proxy;
+	}
 
 private:
     friend class web::http::client::http_client_config;
@@ -483,6 +501,8 @@ class oauth2_config
     utility::string_t m_scope;
     utility::string_t m_state;
 
+	web::web_proxy m_proxy;
+
     bool m_implicit_grant;
     bool m_bearer_auth;
     bool m_http_basic_auth;

Release/src/http/oauth/oauth2.cpp

@@ -26,6 +26,7 @@
 #include "stdafx.h"
 
 using web::http::client::http_client;
+using web::http::client::http_client_config;
 using web::http::oauth2::details::oauth2_strings;
 using web::http::details::mime_types;
 using utility::conversions::to_utf8string;
@@ -134,7 +135,11 @@ pplx::task<void> oauth2_config::_request_token(uri_builder& request_body_ub)
     }
     request.set_body(request_body_ub.query(), mime_types::application_x_www_form_urlencoded);
 
-    http_client token_client(token_endpoint());
+	// configure proxy
+	http_client_config config;
+	config.set_proxy(m_proxy);
+
+    http_client token_client(token_endpoint(), config);
 
     return token_client.request(request)
     .then([](http_response resp)