Issue 351: Reimplement OAuth2 (Step 3 - Tests, Flows and Credential)

Src/GoogleApis.Auth/OAuth2/BearerToken.cs

 /*
 Copyright 2013 Google Inc
 
 Licensed under the Apache License, Version 2.0(the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
 http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
@@ skipping 42 matching lines @@
 /// Thread-safe OAuth 2.0 method for accessing protected resources using
an <c>access_token</c> query parameter
 /// as specified in http://tools.ietf.org/html/rfc6750#section-2.3.
 /// </summary>
 public class QueryParameterAccessMethod : IAccessMethod
 {
 const string AccessTokenKey = "access_token";
 
 public void Intercept(HttpRequestMessage request, string accessToken
)
 {
 var uri = request.RequestUri;
- request.RequestUri = new Uri(string.Format("{0}&{1}{2}{3}",
- uri.ToString(), AccessTokenKey, string.IsNullOrEmpty(uri.Que
 ry) ? "?" : "&",
+ request.RequestUri = new Uri(string.Format("{0}{1}{2}={3}",
+ uri.ToString(), string.IsNullOrEmpty(uri.Query) ? "?" : "&",
  AccessTokenKey,
 Uri.EscapeDataString(accessToken)));
 }
 
 public string GetAccessToken(HttpRequestMessage request)
 {
 var query = request.RequestUri.Query;
 if (string.IsNullOrEmpty(query))
 {
 return null;
 }
 
 // Remove the '?'.
 query = query.Substring(1);
 foreach (var parameter in query.Split('&'))
 {
 var keyValue = parameter.Split('=');
 if (keyValue[0].Equals(AccessTokenKey))
 {
 return keyValue[1];
 }
 }
 return null;
 }
 }
 }
 }