Page Speed Optimization Libraries  1.7.30.1
net/instaweb/http/public/inflating_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 
00018 
00019 #ifndef NET_INSTAWEB_HTTP_PUBLIC_INFLATING_FETCH_H_
00020 #define NET_INSTAWEB_HTTP_PUBLIC_INFLATING_FETCH_H_
00021 
00022 #include "net/instaweb/http/public/async_fetch.h"
00023 #include "net/instaweb/util/public/basictypes.h"
00024 #include "net/instaweb/util/public/gzip_inflater.h"
00025 #include "net/instaweb/util/public/scoped_ptr.h"
00026 #include "net/instaweb/util/public/string_util.h"
00027 
00028 namespace net_instaweb {
00029 
00030 class MessageHandler;
00031 
00042 class InflatingFetch : public SharedAsyncFetch {
00043  public:
00044   explicit InflatingFetch(AsyncFetch* fetch);
00045   virtual ~InflatingFetch();
00046 
00051   void set_inflation_content_type_blacklist(
00052       const std::set<const ContentType*>& bypass_set) {
00053     inflation_content_type_blacklist_ = bypass_set;
00054   }
00055 
00059   void EnableGzipFromBackend();
00060 
00061  protected:
00064   virtual bool HandleWrite(const StringPiece& sp, MessageHandler* handler);
00065 
00068   virtual void HandleHeadersComplete();
00069   virtual void HandleDone(bool success);
00070   virtual void Reset();
00071 
00072  private:
00073   void InitInflater(GzipInflater::InflateType, const StringPiece& value);
00074 
00077   bool IsCompressionAllowedInRequest();
00078 
00079   scoped_ptr<GzipInflater> inflater_;
00080 
00082   bool request_checked_for_accept_encoding_;
00083 
00085   bool compression_desired_;
00086 
00089   bool inflate_failure_;
00090 
00092   std::set<const ContentType*> inflation_content_type_blacklist_;
00093 
00094   DISALLOW_COPY_AND_ASSIGN(InflatingFetch);
00095 };
00096 
00097 }  
00098 
00099 #endif  ///< NET_INSTAWEB_HTTP_PUBLIC_INFLATING_FETCH_H_
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