mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-12-01 01:36:09 +03:00
111 lines
4.0 KiB
C++
111 lines
4.0 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
|
|
// 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/macros.h"
|
|
#include "net/base/completion_once_callback.h"
|
|
#include "net/base/net_export.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;
|
|
|
|
// 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 {
|
|
public:
|
|
WebSocketDeflateStream(std::unique_ptr<WebSocketStream> stream,
|
|
const WebSocketDeflateParameters& params,
|
|
std::unique_ptr<WebSocketDeflatePredictor> predictor);
|
|
~WebSocketDeflateStream() override;
|
|
|
|
// WebSocketStream functions.
|
|
int ReadFrames(std::vector<std::unique_ptr<WebSocketFrame>>* frames,
|
|
CompletionOnceCallback callback) override;
|
|
int WriteFrames(std::vector<std::unique_ptr<WebSocketFrame>>* frames,
|
|
CompletionOnceCallback callback) override;
|
|
void Close() override;
|
|
std::string GetSubProtocol() const override;
|
|
std::string GetExtensions() const override;
|
|
|
|
private:
|
|
enum ReadingState {
|
|
READING_COMPRESSED_MESSAGE,
|
|
READING_UNCOMPRESSED_MESSAGE,
|
|
NOT_READING,
|
|
};
|
|
|
|
enum WritingState {
|
|
WRITING_COMPRESSED_MESSAGE,
|
|
WRITING_UNCOMPRESSED_MESSAGE,
|
|
WRITING_POSSIBLY_COMPRESSED_MESSAGE,
|
|
NOT_WRITING,
|
|
};
|
|
|
|
// Handles asynchronous completion of ReadFrames() call on |stream_|.
|
|
void OnReadComplete(std::vector<std::unique_ptr<WebSocketFrame>>* frames,
|
|
int result);
|
|
|
|
// This function deflates |frames| and stores the result to |frames| itself.
|
|
int Deflate(std::vector<std::unique_ptr<WebSocketFrame>>* frames);
|
|
void OnMessageStart(
|
|
const std::vector<std::unique_ptr<WebSocketFrame>>& frames,
|
|
size_t index);
|
|
int AppendCompressedFrame(
|
|
const WebSocketFrameHeader& header,
|
|
std::vector<std::unique_ptr<WebSocketFrame>>* frames_to_write);
|
|
int AppendPossiblyCompressedMessage(
|
|
std::vector<std::unique_ptr<WebSocketFrame>>* frames,
|
|
std::vector<std::unique_ptr<WebSocketFrame>>* frames_to_write);
|
|
|
|
// This function inflates |frames| and stores the result to |frames| itself.
|
|
int Inflate(std::vector<std::unique_ptr<WebSocketFrame>>* frames);
|
|
|
|
int InflateAndReadIfNecessary(
|
|
std::vector<std::unique_ptr<WebSocketFrame>>* frames);
|
|
|
|
const std::unique_ptr<WebSocketStream> stream_;
|
|
WebSocketDeflater deflater_;
|
|
WebSocketInflater inflater_;
|
|
ReadingState reading_state_;
|
|
WritingState writing_state_;
|
|
WebSocketFrameHeader::OpCode current_reading_opcode_;
|
|
WebSocketFrameHeader::OpCode current_writing_opcode_;
|
|
std::unique_ptr<WebSocketDeflatePredictor> predictor_;
|
|
|
|
// User callback saved for asynchronous reads.
|
|
CompletionOnceCallback read_callback_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(WebSocketDeflateStream);
|
|
};
|
|
|
|
} // namespace net
|
|
|
|
#endif // NET_WEBSOCKETS_WEBSOCKET_DEFLATE_STREAM_H_
|