Page Speed Optimization Libraries  1.5.27.2
net/instaweb/util/public/chunking_writer.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_UTIL_PUBLIC_CHUNKING_WRITER_H_
00020 #define NET_INSTAWEB_UTIL_PUBLIC_CHUNKING_WRITER_H_
00021 
00022 #include "net/instaweb/util/public/basictypes.h"
00023 #include "net/instaweb/util/public/string_util.h"
00024 #include "net/instaweb/util/public/writer.h"
00025 
00026 namespace net_instaweb {
00027 
00028 class MessageHandler;
00029 
00032 class ChunkingWriter : public Writer {
00033  public:
00037   ChunkingWriter(Writer* writer, int flush_limit);
00038   virtual ~ChunkingWriter();
00039 
00040   virtual bool Write(const StringPiece& str, MessageHandler* handler);
00041   virtual bool Flush(MessageHandler* handler);
00042 
00043  private:
00045   bool FlushIfNeeded(MessageHandler* handler);
00046 
00047   Writer* const writer_;
00048   const int flush_limit_;
00049   int unflushed_bytes_;
00050 
00051   DISALLOW_COPY_AND_ASSIGN(ChunkingWriter);
00052 };
00053 
00054 }  
00055 
00056 #endif  ///< NET_INSTAWEB_UTIL_PUBLIC_CHUNKING_WRITER_H_
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