00001 /* 00002 * Copyright 2010 Google Inc. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http:///www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00018 00019 #ifndef NET_INSTAWEB_HTTP_PUBLIC_WAIT_URL_ASYNC_FETCHER_H_ 00020 #define NET_INSTAWEB_HTTP_PUBLIC_WAIT_URL_ASYNC_FETCHER_H_ 00021 00022 #include <vector> 00023 00024 #include "base/scoped_ptr.h" 00025 #include "net/instaweb/util/public/basictypes.h" 00026 #include "net/instaweb/util/public/string.h" 00027 #include "net/instaweb/http/public/url_async_fetcher.h" 00028 00029 namespace net_instaweb { 00030 00031 class AbstractMutex; 00032 class MessageHandler; 00033 class RequestHeaders; 00034 class ResponseHeaders; 00035 class UrlFetcher; 00036 class Writer; 00037 00040 class WaitUrlAsyncFetcher : public UrlAsyncFetcher { 00041 public: 00042 WaitUrlAsyncFetcher(UrlFetcher* url_fetcher, AbstractMutex* mutex) 00043 : url_fetcher_(url_fetcher), 00044 pass_through_mode_(false), 00045 mutex_(mutex) { 00046 } 00047 virtual ~WaitUrlAsyncFetcher(); 00048 00050 virtual bool StreamingFetch(const GoogleString& url, 00051 const RequestHeaders& request_headers, 00052 ResponseHeaders* response_headers, 00053 Writer* response_writer, 00054 MessageHandler* message_handler, 00055 Callback* callback); 00056 00058 void CallCallbacks(); 00059 00063 bool SetPassThroughMode(bool pass_through_mode); 00064 00065 private: 00066 class DelayedFetch; 00067 00068 bool CallCallbacksAndSwitchModesHelper(bool new_mode); 00069 00070 UrlFetcher* url_fetcher_; 00071 std::vector<DelayedFetch*> delayed_fetches_; 00072 bool pass_through_mode_; 00073 scoped_ptr<AbstractMutex> mutex_; 00074 00075 DISALLOW_COPY_AND_ASSIGN(WaitUrlAsyncFetcher); 00076 }; 00077 00078 } 00079 00080 #endif ///< NET_INSTAWEB_HTTP_PUBLIC_WAIT_URL_ASYNC_FETCHER_H_