Page Speed Optimization Libraries  1.8.31.2
net/instaweb/rewriter/public/resource_fetch.h
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00001 /*
00002  * Copyright 2011 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 
00022 
00023 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_RESOURCE_FETCH_H_
00024 #define NET_INSTAWEB_REWRITER_PUBLIC_RESOURCE_FETCH_H_
00025 
00026 #include "net/instaweb/http/public/async_fetch.h"
00027 #include "net/instaweb/http/public/request_context.h"
00028 #include "net/instaweb/util/public/basictypes.h"
00029 #include "net/instaweb/util/public/google_url.h"
00030 
00031 namespace net_instaweb {
00032 
00033 class MessageHandler;
00034 class ServerContext;
00035 class RewriteDriver;
00036 class RewriteOptions;
00037 class SyncFetcherAdapterCallback;
00038 class Timer;
00039 
00044 class ResourceFetch : public SharedAsyncFetch {
00045  public:
00047   enum CleanupMode {
00048     kAutoCleanupDriver,
00049     kDontAutoCleanupDriver
00050   };
00051 
00056   static void Start(const GoogleUrl& url,
00057                     RewriteOptions* custom_options,
00061                     bool using_spdy,
00062                     ServerContext* server_context,
00063                     AsyncFetch* async_fetch);
00064 
00070   static void StartWithDriver(const GoogleUrl& url,
00071                               CleanupMode cleanup_mode,
00072                               ServerContext* server_context,
00073                               RewriteDriver* driver,
00074                               AsyncFetch* async_fetch);
00075 
00086   static bool BlockingFetch(const GoogleUrl& url,
00087                             ServerContext* server_context,
00088                             RewriteDriver* driver,
00089                             SyncFetcherAdapterCallback* async_fetch);
00090 
00098   static RewriteDriver* GetDriver(const GoogleUrl& url,
00099                                   RewriteOptions* custom_options,
00100                                   ServerContext* server_context,
00101                                   const RequestContextPtr& request_ctx);
00102 
00103  protected:
00105   virtual void HandleHeadersComplete();
00106   virtual void HandleDone(bool success);
00107 
00108  private:
00109   ResourceFetch(const GoogleUrl& url, CleanupMode cleanup_mode,
00110                 RewriteDriver* driver, Timer* timer,
00111                 MessageHandler* handler, AsyncFetch* async_fetch);
00112   virtual ~ResourceFetch();
00113 
00117   static void ApplyExperimentOptions(const GoogleUrl& url,
00118                                      const RequestContextPtr& request_ctx,
00119                                      ServerContext* server_context,
00120                                      RewriteOptions** custom_options);
00121 
00122   GoogleUrl resource_url_;
00123   RewriteDriver* driver_;
00124   Timer* timer_;
00125   MessageHandler* message_handler_;
00126 
00127   int64 start_time_ms_;
00128   int redirect_count_;
00129   CleanupMode cleanup_mode_;
00130 
00131   DISALLOW_COPY_AND_ASSIGN(ResourceFetch);
00132 };
00133 
00134 }  
00135 
00136 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_RESOURCE_FETCH_H_
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