chromium/net/websockets/websocket_deflate_stream.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_WEBSOCKETS_WEBSOCKET_DEFLATE_STREAM_H_
#define NET_WEBSOCKETS_WEBSOCKET_DEFLATE_STREAM_H_

#include <stddef.h>

#include <memory>
#include <string>
#include <vector>

#include "base/memory/scoped_refptr.h"
#include "net/base/completion_once_callback.h"
#include "net/base/net_export.h"
#include "net/log/net_log_with_source.h"
#include "net/websockets/websocket_deflater.h"
#include "net/websockets/websocket_frame.h"
#include "net/websockets/websocket_inflater.h"
#include "net/websockets/websocket_stream.h"

namespace net {

class WebSocketDeflateParameters;
class WebSocketDeflatePredictor;
class IOBufferWithSize;
class NetLogWithSource;

// WebSocketDeflateStream is a WebSocketStream subclass.
// WebSocketDeflateStream is for permessage-deflate WebSocket extension[1].
//
// WebSocketDeflateStream::ReadFrames and WriteFrames may change frame
// boundary. In particular, if a control frame is placed in the middle of
// data message frames, the control frame can overtake data frames.
// Say there are frames df1, df2 and cf, df1 and df2 are frames of a
// data message and cf is a control message frame. cf may arrive first and
// data frames may follow cf.
// Note that message boundary will be preserved, i.e. if the last frame of
// a message m1 is read / written before the last frame of a message m2,
// WebSocketDeflateStream will respect the order.
//
// [1]: http://tools.ietf.org/html/draft-ietf-hybi-permessage-compression-12
class NET_EXPORT_PRIVATE WebSocketDeflateStream : public WebSocketStream { … };

}  // namespace net

#endif  // NET_WEBSOCKETS_WEBSOCKET_DEFLATE_STREAM_H_