153 lines
4.8 KiB
C++
153 lines
4.8 KiB
C++
/*
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* IXWebSocketTransport.h
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* Author: Benjamin Sergeant
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* Copyright (c) 2017-2018 Machine Zone, Inc. All rights reserved.
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*/
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#pragma once
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//
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// Adapted from https://github.com/dhbaird/easywsclient
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//
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#include <string>
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#include <vector>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <atomic>
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#include "IXWebSocketSendInfo.h"
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#include "IXWebSocketPerMessageDeflate.h"
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#include "IXWebSocketPerMessageDeflateOptions.h"
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#include "IXWebSocketHttpHeaders.h"
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#include "IXCancellationRequest.h"
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#include "IXWebSocketHandshake.h"
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namespace ix
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{
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class Socket;
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class WebSocketTransport
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{
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public:
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enum ReadyStateValues
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{
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CLOSING,
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CLOSED,
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CONNECTING,
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OPEN
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};
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enum MessageKind
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{
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MSG,
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PING,
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PONG
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};
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using OnMessageCallback = std::function<void(const std::string&,
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size_t,
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bool,
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MessageKind)>;
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using OnCloseCallback = std::function<void(uint16_t,
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const std::string&,
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size_t)>;
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WebSocketTransport();
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~WebSocketTransport();
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void configure(const WebSocketPerMessageDeflateOptions& perMessageDeflateOptions,
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int hearBeatPeriod);
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WebSocketInitResult connectToUrl(const std::string& url, // Client
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int timeoutSecs);
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WebSocketInitResult connectToSocket(int fd, // Server
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int timeoutSecs);
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void poll();
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WebSocketSendInfo sendBinary(const std::string& message);
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WebSocketSendInfo sendPing(const std::string& message);
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void close();
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ReadyStateValues getReadyState() const;
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void setReadyState(ReadyStateValues readyStateValue);
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void setOnCloseCallback(const OnCloseCallback& onCloseCallback);
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void dispatch(const OnMessageCallback& onMessageCallback);
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private:
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std::string _url;
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std::string _origin;
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struct wsheader_type {
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unsigned header_size;
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bool fin;
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bool rsv1;
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bool mask;
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enum opcode_type {
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CONTINUATION = 0x0,
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TEXT_FRAME = 0x1,
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BINARY_FRAME = 0x2,
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CLOSE = 8,
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PING = 9,
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PONG = 0xa,
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} opcode;
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int N0;
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uint64_t N;
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uint8_t masking_key[4];
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};
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std::vector<uint8_t> _rxbuf;
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std::vector<uint8_t> _txbuf;
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mutable std::mutex _txbufMutex;
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std::vector<uint8_t> _receivedData;
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std::shared_ptr<Socket> _socket;
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std::atomic<ReadyStateValues> _readyState;
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OnCloseCallback _onCloseCallback;
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uint16_t _closeCode;
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std::string _closeReason;
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size_t _closeWireSize;
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mutable std::mutex _closeDataMutex;
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WebSocketPerMessageDeflate _perMessageDeflate;
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WebSocketPerMessageDeflateOptions _perMessageDeflateOptions;
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std::atomic<bool> _enablePerMessageDeflate;
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// Used to cancel dns lookup + socket connect + http upgrade
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std::atomic<bool> _requestInitCancellation;
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// Optional Heartbeat
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int _heartBeatPeriod;
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static const int kDefaultHeartBeatPeriod;
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const static std::string kHeartBeatPingMessage;
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mutable std::mutex _lastSendTimePointMutex;
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std::chrono::time_point<std::chrono::steady_clock> _lastSendTimePoint;
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// No data was send through the socket for longer that the hearbeat period
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bool exceedSendHeartBeatTimeOut();
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void sendOnSocket();
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WebSocketSendInfo sendData(wsheader_type::opcode_type type,
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const std::string& message,
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bool compress);
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void emitMessage(MessageKind messageKind,
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const std::string& message,
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const wsheader_type& ws,
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const OnMessageCallback& onMessageCallback);
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bool isSendBufferEmpty() const;
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void appendToSendBuffer(const std::vector<uint8_t>& header,
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std::string::const_iterator begin,
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std::string::const_iterator end,
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uint64_t message_size,
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uint8_t masking_key[4]);
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void appendToSendBuffer(const std::vector<uint8_t>& buffer);
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unsigned getRandomUnsigned();
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void unmaskReceiveBuffer(const wsheader_type& ws);
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};
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}
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