Handling of multiple concurrent requests from different clients in OAuth2TokenService

google_apis/gaia/oauth2_access_token_fetcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "google_apis/gaia/oauth2_access_token_fetcher.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 42 matching lines @@
     DLOG(WARNING) << "Could not reach Google Accounts servers: errno "
                   << status.error();
     return GoogleServiceAuthError::FromConnectionError(status.error());
   }
 }
 
 static URLFetcher* CreateFetcher(URLRequestContextGetter* getter,
                                  const GURL& url,
                                  const std::string& body,
                                  URLFetcherDelegate* delegate) {
+  static int fetcher_index = 0;
   bool empty_body = body.empty();
   URLFetcher* result = net::URLFetcher::Create(
-      0, url,
+      fetcher_index++, url,
       empty_body ? URLFetcher::GET : URLFetcher::POST,
       delegate);
 
   result->SetRequestContext(getter);
   result->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
                        net::LOAD_DO_NOT_SAVE_COOKIES);
   // Fetchers are sometimes cancelled because a network change was detected,
   // especially at startup and after sign-in on ChromeOS. Retrying once should
   // be enough in those cases; let the fetcher retry up to 3 times just in case.
   // http://crbug.com/163710
@@ skipping 148 matching lines @@
   source->GetResponseAsString(&data);
   scoped_ptr<base::Value> value(base::JSONReader::Read(data));
   if (!value.get() || value->GetType() != base::Value::TYPE_DICTIONARY)
     return false;
 
   base::DictionaryValue* dict =
       static_cast<base::DictionaryValue*>(value.get());
   return dict->GetString(kAccessTokenKey, access_token) &&
       dict->GetInteger(kExpiresInKey, expires_in);
 }