903 lines
30 KiB
C++
903 lines
30 KiB
C++
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2012, 2013 <dhbaird@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* IXWebSocketTransport.cpp
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* Author: Benjamin Sergeant
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* Copyright (c) 2017-2019 Machine Zone, Inc. All rights reserved.
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*/
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//
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// Adapted from https://github.com/dhbaird/easywsclient
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//
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#include "IXWebSocketTransport.h"
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#include "IXWebSocketHandshake.h"
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#include "IXWebSocketHttpHeaders.h"
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#include "IXUrlParser.h"
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#include "IXSocketFactory.h"
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#include <string.h>
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#include <stdlib.h>
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#include <cstdlib>
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#include <vector>
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#include <string>
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#include <cstdarg>
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#include <sstream>
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#include <chrono>
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#include <thread>
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namespace
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{
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int greatestCommonDivisor(int a, int b)
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{
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while (b != 0)
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{
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int t = b;
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b = a % b;
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a = t;
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}
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return a;
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}
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}
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namespace ix
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{
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const std::string WebSocketTransport::kPingMessage("ixwebsocket::heartbeat");
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const int WebSocketTransport::kDefaultPingIntervalSecs(-1);
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const int WebSocketTransport::kDefaultPingTimeoutSecs(-1);
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const bool WebSocketTransport::kDefaultEnablePong(true);
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constexpr size_t WebSocketTransport::kChunkSize;
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const uint16_t WebSocketTransport::kInternalErrorCode(1011);
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const uint16_t WebSocketTransport::kAbnormalCloseCode(1006);
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const uint16_t WebSocketTransport::kProtocolErrorCode(1002);
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const std::string WebSocketTransport::kInternalErrorMessage("Internal error");
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const std::string WebSocketTransport::kAbnormalCloseMessage("Abnormal closure");
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const std::string WebSocketTransport::kPingTimeoutMessage("Ping timeout");
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const std::string WebSocketTransport::kProtocolErrorMessage("Protocol error");
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WebSocketTransport::WebSocketTransport() :
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_useMask(true),
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_readyState(CLOSED),
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_closeCode(kInternalErrorCode),
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_closeReason(kInternalErrorMessage),
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_closeWireSize(0),
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_closeRemote(false),
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_enablePerMessageDeflate(false),
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_requestInitCancellation(false),
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_enablePong(kDefaultEnablePong),
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_pingIntervalSecs(kDefaultPingIntervalSecs),
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_pingTimeoutSecs(kDefaultPingTimeoutSecs),
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_pingIntervalOrTimeoutGCDSecs(-1),
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_lastSendPingTimePoint(std::chrono::steady_clock::now()),
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_lastReceivePongTimePoint(std::chrono::steady_clock::now())
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{
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_readbuf.resize(kChunkSize);
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}
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WebSocketTransport::~WebSocketTransport()
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{
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;
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}
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void WebSocketTransport::configure(const WebSocketPerMessageDeflateOptions& perMessageDeflateOptions,
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bool enablePong,
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int pingIntervalSecs,
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int pingTimeoutSecs)
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{
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_perMessageDeflateOptions = perMessageDeflateOptions;
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_enablePerMessageDeflate = _perMessageDeflateOptions.enabled();
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_enablePong = enablePong;
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_pingIntervalSecs = pingIntervalSecs;
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_pingTimeoutSecs = pingTimeoutSecs;
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if (pingIntervalSecs > 0 && pingTimeoutSecs > 0)
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{
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_pingIntervalOrTimeoutGCDSecs = greatestCommonDivisor(pingIntervalSecs,
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pingTimeoutSecs);
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}
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else if (_pingTimeoutSecs > 0)
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{
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_pingIntervalOrTimeoutGCDSecs = pingTimeoutSecs;
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}
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else
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{
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_pingIntervalOrTimeoutGCDSecs = pingIntervalSecs;
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}
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}
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// Client
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WebSocketInitResult WebSocketTransport::connectToUrl(const std::string& url,
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int timeoutSecs)
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{
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std::string protocol, host, path, query;
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int port;
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if (!UrlParser::parse(url, protocol, host, path, query, port))
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{
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return WebSocketInitResult(false, 0,
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std::string("Could not parse URL ") + url);
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}
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bool tls = protocol == "wss";
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std::string errorMsg;
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_socket = createSocket(tls, errorMsg);
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if (!_socket)
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{
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return WebSocketInitResult(false, 0, errorMsg);
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}
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WebSocketHandshake webSocketHandshake(_requestInitCancellation,
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_socket,
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_perMessageDeflate,
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_perMessageDeflateOptions,
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_enablePerMessageDeflate);
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auto result = webSocketHandshake.clientHandshake(url, host, path, port,
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timeoutSecs);
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if (result.success)
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{
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setReadyState(OPEN);
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}
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return result;
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}
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// Server
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WebSocketInitResult WebSocketTransport::connectToSocket(int fd, int timeoutSecs)
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{
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// Server should not mask the data it sends to the client
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_useMask = false;
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std::string errorMsg;
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_socket = createSocket(fd, errorMsg);
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if (!_socket)
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{
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return WebSocketInitResult(false, 0, errorMsg);
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}
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WebSocketHandshake webSocketHandshake(_requestInitCancellation,
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_socket,
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_perMessageDeflate,
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_perMessageDeflateOptions,
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_enablePerMessageDeflate);
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auto result = webSocketHandshake.serverHandshake(fd, timeoutSecs);
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if (result.success)
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{
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setReadyState(OPEN);
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}
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return result;
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}
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WebSocketTransport::ReadyStateValues WebSocketTransport::getReadyState() const
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{
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return _readyState;
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}
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void WebSocketTransport::setReadyState(ReadyStateValues readyStateValue)
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{
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// No state change, return
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if (_readyState == readyStateValue) return;
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if (readyStateValue == CLOSED)
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{
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std::lock_guard<std::mutex> lock(_closeDataMutex);
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_onCloseCallback(_closeCode, _closeReason, _closeWireSize, _closeRemote);
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_closeCode = kInternalErrorCode;
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_closeReason = kInternalErrorMessage;
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_closeWireSize = 0;
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_closeRemote = false;
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}
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_readyState = readyStateValue;
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}
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void WebSocketTransport::setOnCloseCallback(const OnCloseCallback& onCloseCallback)
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{
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_onCloseCallback = onCloseCallback;
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}
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// Only consider send PING time points for that computation.
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bool WebSocketTransport::pingIntervalExceeded()
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{
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if (_pingIntervalSecs <= 0)
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return false;
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std::lock_guard<std::mutex> lock(_lastSendPingTimePointMutex);
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auto now = std::chrono::steady_clock::now();
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return now - _lastSendPingTimePoint > std::chrono::seconds(_pingIntervalSecs);
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}
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bool WebSocketTransport::pingTimeoutExceeded()
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{
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if (_pingTimeoutSecs <= 0)
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return false;
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std::lock_guard<std::mutex> lock(_lastReceivePongTimePointMutex);
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auto now = std::chrono::steady_clock::now();
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return now - _lastReceivePongTimePoint > std::chrono::seconds(_pingTimeoutSecs);
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}
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void WebSocketTransport::poll()
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{
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PollResultType pollResult = _socket->poll(_pingIntervalOrTimeoutGCDSecs);
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if (_readyState == OPEN)
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{
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// if (1) ping timeout is enabled and (2) duration since last received
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// ping response (PONG) exceeds the maximum delay, then close the connection
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if (pingTimeoutExceeded())
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{
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close(kInternalErrorCode, kPingTimeoutMessage);
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}
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// If ping is enabled and no ping has been sent for a duration
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// exceeding our ping interval, send a ping to the server.
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else if (pingIntervalExceeded())
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{
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std::stringstream ss;
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ss << kPingMessage << "::" << _pingIntervalSecs << "s";
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sendPing(ss.str());
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}
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}
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// Make sure we send all the buffered data
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// there can be a lot of it for large messages.
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if (pollResult == PollResultType::SendRequest)
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{
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while (!isSendBufferEmpty() && !_requestInitCancellation)
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{
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// Wait with a 10ms timeout until the socket is ready to write.
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// This way we are not busy looping
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PollResultType result = _socket->isReadyToWrite(10);
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if (result == PollResultType::Error)
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{
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_socket->close();
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setReadyState(CLOSED);
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break;
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}
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else if (result == PollResultType::ReadyForWrite)
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{
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sendOnSocket();
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}
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}
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}
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else if (pollResult == PollResultType::ReadyForRead)
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{
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while (true)
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{
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ssize_t ret = _socket->recv((char*)&_readbuf[0], _readbuf.size());
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if (ret < 0 && Socket::isWaitNeeded())
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{
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break;
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}
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else if (ret <= 0)
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{
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_rxbuf.clear();
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_socket->close();
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{
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std::lock_guard<std::mutex> lock(_closeDataMutex);
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_closeCode = kAbnormalCloseCode;
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_closeReason = kAbnormalCloseMessage;
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_closeWireSize = 0;
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_closeRemote = true;
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}
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setReadyState(CLOSED);
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break;
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}
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else
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{
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_rxbuf.insert(_rxbuf.end(),
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_readbuf.begin(),
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_readbuf.begin() + ret);
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}
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}
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}
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else if (pollResult == PollResultType::Error)
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{
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_socket->close();
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}
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else if (pollResult == PollResultType::CloseRequest)
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{
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_socket->close();
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}
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// Avoid a race condition where we get stuck in select
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// while closing.
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if (_readyState == CLOSING)
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{
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_socket->close();
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}
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}
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bool WebSocketTransport::isSendBufferEmpty() const
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{
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std::lock_guard<std::mutex> lock(_txbufMutex);
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return _txbuf.empty();
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}
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void WebSocketTransport::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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{
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std::lock_guard<std::mutex> lock(_txbufMutex);
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_txbuf.insert(_txbuf.end(), header.begin(), header.end());
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_txbuf.insert(_txbuf.end(), begin, end);
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if (_useMask)
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{
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for (size_t i = 0; i != (size_t) message_size; ++i)
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{
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*(_txbuf.end() - (size_t) message_size + i) ^= masking_key[i&0x3];
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}
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}
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}
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void WebSocketTransport::unmaskReceiveBuffer(const wsheader_type& ws)
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{
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if (ws.mask)
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{
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for (size_t j = 0; j != ws.N; ++j)
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{
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_rxbuf[j+ws.header_size] ^= ws.masking_key[j&0x3];
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}
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}
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}
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//
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// http://tools.ietf.org/html/rfc6455#section-5.2 Base Framing Protocol
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//
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// 0 1 2 3
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// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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// +-+-+-+-+-------+-+-------------+-------------------------------+
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// |F|R|R|R| opcode|M| Payload len | Extended payload length |
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// |I|S|S|S| (4) |A| (7) | (16/64) |
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// |N|V|V|V| |S| | (if payload len==126/127) |
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// | |1|2|3| |K| | |
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// +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
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// | Extended payload length continued, if payload len == 127 |
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// + - - - - - - - - - - - - - - - +-------------------------------+
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// | |Masking-key, if MASK set to 1 |
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// +-------------------------------+-------------------------------+
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// | Masking-key (continued) | Payload Data |
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// +-------------------------------- - - - - - - - - - - - - - - - +
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// : Payload Data continued ... :
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// + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
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// | Payload Data continued ... |
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// +---------------------------------------------------------------+
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//
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void WebSocketTransport::dispatch(const OnMessageCallback& onMessageCallback)
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{
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while (true)
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{
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wsheader_type ws;
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if (_rxbuf.size() < 2) return; /* Need at least 2 */
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const uint8_t * data = (uint8_t *) &_rxbuf[0]; // peek, but don't consume
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ws.fin = (data[0] & 0x80) == 0x80;
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ws.rsv1 = (data[0] & 0x40) == 0x40;
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ws.opcode = (wsheader_type::opcode_type) (data[0] & 0x0f);
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ws.mask = (data[1] & 0x80) == 0x80;
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ws.N0 = (data[1] & 0x7f);
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ws.header_size = 2 + (ws.N0 == 126? 2 : 0) + (ws.N0 == 127? 8 : 0) + (ws.mask? 4 : 0);
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if (_rxbuf.size() < ws.header_size) return; /* Need: ws.header_size - _rxbuf.size() */
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//
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// Calculate payload length:
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// 0-125 mean the payload is that long.
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// 126 means that the following two bytes indicate the length,
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// 127 means the next 8 bytes indicate the length.
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//
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int i = 0;
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if (ws.N0 < 126)
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{
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ws.N = ws.N0;
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i = 2;
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}
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else if (ws.N0 == 126)
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{
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ws.N = 0;
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ws.N |= ((uint64_t) data[2]) << 8;
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ws.N |= ((uint64_t) data[3]) << 0;
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i = 4;
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}
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else if (ws.N0 == 127)
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{
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ws.N = 0;
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ws.N |= ((uint64_t) data[2]) << 56;
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ws.N |= ((uint64_t) data[3]) << 48;
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ws.N |= ((uint64_t) data[4]) << 40;
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ws.N |= ((uint64_t) data[5]) << 32;
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ws.N |= ((uint64_t) data[6]) << 24;
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ws.N |= ((uint64_t) data[7]) << 16;
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ws.N |= ((uint64_t) data[8]) << 8;
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ws.N |= ((uint64_t) data[9]) << 0;
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i = 10;
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}
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else
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{
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// invalid payload length according to the spec. bail out
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return;
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}
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if (ws.mask)
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{
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ws.masking_key[0] = ((uint8_t) data[i+0]) << 0;
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ws.masking_key[1] = ((uint8_t) data[i+1]) << 0;
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ws.masking_key[2] = ((uint8_t) data[i+2]) << 0;
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ws.masking_key[3] = ((uint8_t) data[i+3]) << 0;
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}
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else
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{
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ws.masking_key[0] = 0;
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ws.masking_key[1] = 0;
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ws.masking_key[2] = 0;
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ws.masking_key[3] = 0;
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}
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if (_rxbuf.size() < ws.header_size+ws.N)
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{
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return; /* Need: ws.header_size+ws.N - _rxbuf.size() */
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}
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// We got a whole message, now do something with it:
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if (
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ws.opcode == wsheader_type::TEXT_FRAME
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|| ws.opcode == wsheader_type::BINARY_FRAME
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|| ws.opcode == wsheader_type::CONTINUATION
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) {
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unmaskReceiveBuffer(ws);
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//
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// Usual case. Small unfragmented messages
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//
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if (ws.fin && _chunks.empty())
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{
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emitMessage(MSG,
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std::string(_rxbuf.begin()+ws.header_size,
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_rxbuf.begin()+ws.header_size+(size_t) ws.N),
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ws,
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onMessageCallback);
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}
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else
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{
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//
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// Add intermediary message to our chunk list.
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// We use a chunk list instead of a big buffer because resizing
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// large buffer can be very costly when we need to re-allocate
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// the internal buffer which is slow and can let the internal OS
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// receive buffer fill out.
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//
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_chunks.emplace_back(
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std::vector<uint8_t>(_rxbuf.begin()+ws.header_size,
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_rxbuf.begin()+ws.header_size+(size_t)ws.N));
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if (ws.fin)
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{
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emitMessage(MSG, getMergedChunks(), ws, onMessageCallback);
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_chunks.clear();
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}
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else
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{
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emitMessage(FRAGMENT, std::string(), ws, onMessageCallback);
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}
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}
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}
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else if (ws.opcode == wsheader_type::PING)
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{
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unmaskReceiveBuffer(ws);
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std::string pingData(_rxbuf.begin()+ws.header_size,
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_rxbuf.begin()+ws.header_size + (size_t) ws.N);
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if (_enablePong)
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{
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// Reply back right away
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bool compress = false;
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sendData(wsheader_type::PONG, pingData, compress);
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}
|
|
|
|
emitMessage(PING, pingData, ws, onMessageCallback);
|
|
}
|
|
else if (ws.opcode == wsheader_type::PONG)
|
|
{
|
|
unmaskReceiveBuffer(ws);
|
|
std::string pongData(_rxbuf.begin()+ws.header_size,
|
|
_rxbuf.begin()+ws.header_size + (size_t) ws.N);
|
|
|
|
std::lock_guard<std::mutex> lck(_lastReceivePongTimePointMutex);
|
|
_lastReceivePongTimePoint = std::chrono::steady_clock::now();
|
|
|
|
emitMessage(PONG, pongData, ws, onMessageCallback);
|
|
}
|
|
else if (ws.opcode == wsheader_type::CLOSE)
|
|
{
|
|
unmaskReceiveBuffer(ws);
|
|
|
|
// Extract the close code first, available as the first 2 bytes
|
|
uint16_t code = 0;
|
|
code |= ((uint64_t) _rxbuf[ws.header_size]) << 8;
|
|
code |= ((uint64_t) _rxbuf[ws.header_size+1]) << 0;
|
|
|
|
// Get the reason.
|
|
std::string reason(_rxbuf.begin()+ws.header_size + 2,
|
|
_rxbuf.begin()+ws.header_size + (size_t) ws.N);
|
|
|
|
bool remote = true;
|
|
|
|
close(code, reason, _rxbuf.size(), remote);
|
|
}
|
|
else
|
|
{
|
|
// Unexpected frame type
|
|
|
|
close(kProtocolErrorCode, kProtocolErrorMessage, _rxbuf.size());
|
|
}
|
|
|
|
// Erase the message that has been processed from the input/read buffer
|
|
_rxbuf.erase(_rxbuf.begin(),
|
|
_rxbuf.begin() + ws.header_size + (size_t) ws.N);
|
|
}
|
|
}
|
|
|
|
std::string WebSocketTransport::getMergedChunks() const
|
|
{
|
|
size_t length = 0;
|
|
for (auto&& chunk : _chunks)
|
|
{
|
|
length += chunk.size();
|
|
}
|
|
|
|
std::string msg;
|
|
msg.reserve(length);
|
|
|
|
for (auto&& chunk : _chunks)
|
|
{
|
|
std::string str(chunk.begin(), chunk.end());
|
|
msg += str;
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
void WebSocketTransport::emitMessage(MessageKind messageKind,
|
|
const std::string& message,
|
|
const wsheader_type& ws,
|
|
const OnMessageCallback& onMessageCallback)
|
|
{
|
|
size_t wireSize = message.size();
|
|
|
|
// When the RSV1 bit is 1 it means the message is compressed
|
|
if (_enablePerMessageDeflate && ws.rsv1 && messageKind != FRAGMENT)
|
|
{
|
|
std::string decompressedMessage;
|
|
bool success = _perMessageDeflate.decompress(message, decompressedMessage);
|
|
onMessageCallback(decompressedMessage, wireSize, !success, messageKind);
|
|
}
|
|
else
|
|
{
|
|
onMessageCallback(message, wireSize, false, messageKind);
|
|
}
|
|
}
|
|
|
|
unsigned WebSocketTransport::getRandomUnsigned()
|
|
{
|
|
auto now = std::chrono::system_clock::now();
|
|
auto seconds =
|
|
std::chrono::duration_cast<std::chrono::seconds>(
|
|
now.time_since_epoch()).count();
|
|
return static_cast<unsigned>(seconds);
|
|
}
|
|
|
|
WebSocketSendInfo WebSocketTransport::sendData(
|
|
wsheader_type::opcode_type type,
|
|
const std::string& message,
|
|
bool compress,
|
|
const OnProgressCallback& onProgressCallback)
|
|
{
|
|
if (_readyState == CLOSING || _readyState == CLOSED)
|
|
{
|
|
return WebSocketSendInfo();
|
|
}
|
|
|
|
size_t payloadSize = message.size();
|
|
size_t wireSize = message.size();
|
|
std::string compressedMessage;
|
|
bool compressionError = false;
|
|
|
|
std::string::const_iterator message_begin = message.begin();
|
|
std::string::const_iterator message_end = message.end();
|
|
|
|
if (compress)
|
|
{
|
|
if (!_perMessageDeflate.compress(message, compressedMessage))
|
|
{
|
|
bool success = false;
|
|
compressionError = true;
|
|
payloadSize = 0;
|
|
wireSize = 0;
|
|
return WebSocketSendInfo(success, compressionError, payloadSize, wireSize);
|
|
}
|
|
compressionError = false;
|
|
wireSize = compressedMessage.size();
|
|
|
|
message_begin = compressedMessage.begin();
|
|
message_end = compressedMessage.end();
|
|
}
|
|
|
|
// Common case for most message. No fragmentation required.
|
|
if (wireSize < kChunkSize)
|
|
{
|
|
sendFragment(type, true, message_begin, message_end, compress);
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Large messages need to be fragmented
|
|
//
|
|
// Rules:
|
|
// First message needs to specify a proper type (BINARY or TEXT)
|
|
// Intermediary and last messages need to be of type CONTINUATION
|
|
// Last message must set the fin byte.
|
|
//
|
|
auto steps = wireSize / kChunkSize;
|
|
|
|
std::string::const_iterator begin = message_begin;
|
|
std::string::const_iterator end = message_end;
|
|
|
|
for (uint64_t i = 0 ; i < steps; ++i)
|
|
{
|
|
bool firstStep = i == 0;
|
|
bool lastStep = (i+1) == steps;
|
|
bool fin = lastStep;
|
|
|
|
end = begin + kChunkSize;
|
|
if (lastStep)
|
|
{
|
|
end = message_end;
|
|
}
|
|
|
|
auto opcodeType = type;
|
|
if (!firstStep)
|
|
{
|
|
opcodeType = wsheader_type::CONTINUATION;
|
|
}
|
|
|
|
// Send message
|
|
sendFragment(opcodeType, fin, begin, end, compress);
|
|
|
|
if (onProgressCallback && !onProgressCallback((int)i, (int) steps))
|
|
{
|
|
break;
|
|
}
|
|
|
|
begin += kChunkSize;
|
|
}
|
|
}
|
|
|
|
// Request to flush the send buffer on the background thread if it isn't empty
|
|
if (!isSendBufferEmpty())
|
|
{
|
|
_socket->wakeUpFromPoll(Socket::kSendRequest);
|
|
}
|
|
|
|
return WebSocketSendInfo(true, compressionError, payloadSize, wireSize);
|
|
}
|
|
|
|
void WebSocketTransport::sendFragment(wsheader_type::opcode_type type,
|
|
bool fin,
|
|
std::string::const_iterator message_begin,
|
|
std::string::const_iterator message_end,
|
|
bool compress)
|
|
{
|
|
uint64_t message_size = static_cast<uint64_t>(message_end - message_begin);
|
|
|
|
unsigned x = getRandomUnsigned();
|
|
uint8_t masking_key[4] = {};
|
|
masking_key[0] = (x >> 24);
|
|
masking_key[1] = (x >> 16) & 0xff;
|
|
masking_key[2] = (x >> 8) & 0xff;
|
|
masking_key[3] = (x) & 0xff;
|
|
|
|
std::vector<uint8_t> header;
|
|
header.assign(2 +
|
|
(message_size >= 126 ? 2 : 0) +
|
|
(message_size >= 65536 ? 6 : 0) +
|
|
(_useMask ? 4 : 0), 0);
|
|
header[0] = type;
|
|
|
|
// The fin bit indicate that this is the last fragment. Fin is French for end.
|
|
if (fin)
|
|
{
|
|
header[0] |= 0x80;
|
|
}
|
|
|
|
// This bit indicate that the frame is compressed
|
|
if (compress)
|
|
{
|
|
header[0] |= 0x40;
|
|
}
|
|
|
|
if (message_size < 126)
|
|
{
|
|
header[1] = (message_size & 0xff) | (_useMask ? 0x80 : 0);
|
|
|
|
if (_useMask)
|
|
{
|
|
header[2] = masking_key[0];
|
|
header[3] = masking_key[1];
|
|
header[4] = masking_key[2];
|
|
header[5] = masking_key[3];
|
|
}
|
|
}
|
|
else if (message_size < 65536)
|
|
{
|
|
header[1] = 126 | (_useMask ? 0x80 : 0);
|
|
header[2] = (message_size >> 8) & 0xff;
|
|
header[3] = (message_size >> 0) & 0xff;
|
|
|
|
if (_useMask)
|
|
{
|
|
header[4] = masking_key[0];
|
|
header[5] = masking_key[1];
|
|
header[6] = masking_key[2];
|
|
header[7] = masking_key[3];
|
|
}
|
|
}
|
|
else
|
|
{ // TODO: run coverage testing here
|
|
header[1] = 127 | (_useMask ? 0x80 : 0);
|
|
header[2] = (message_size >> 56) & 0xff;
|
|
header[3] = (message_size >> 48) & 0xff;
|
|
header[4] = (message_size >> 40) & 0xff;
|
|
header[5] = (message_size >> 32) & 0xff;
|
|
header[6] = (message_size >> 24) & 0xff;
|
|
header[7] = (message_size >> 16) & 0xff;
|
|
header[8] = (message_size >> 8) & 0xff;
|
|
header[9] = (message_size >> 0) & 0xff;
|
|
|
|
if (_useMask)
|
|
{
|
|
header[10] = masking_key[0];
|
|
header[11] = masking_key[1];
|
|
header[12] = masking_key[2];
|
|
header[13] = masking_key[3];
|
|
}
|
|
}
|
|
|
|
// _txbuf will keep growing until it can be transmitted over the socket:
|
|
appendToSendBuffer(header, message_begin, message_end,
|
|
message_size, masking_key);
|
|
|
|
// Now actually send this data
|
|
sendOnSocket();
|
|
}
|
|
|
|
WebSocketSendInfo WebSocketTransport::sendPing(const std::string& message)
|
|
{
|
|
bool compress = false;
|
|
WebSocketSendInfo info = sendData(wsheader_type::PING, message, compress);
|
|
|
|
if (info.success)
|
|
{
|
|
std::lock_guard<std::mutex> lck(_lastSendPingTimePointMutex);
|
|
_lastSendPingTimePoint = std::chrono::steady_clock::now();
|
|
}
|
|
|
|
return info;
|
|
}
|
|
|
|
WebSocketSendInfo WebSocketTransport::sendBinary(
|
|
const std::string& message,
|
|
const OnProgressCallback& onProgressCallback)
|
|
|
|
{
|
|
return sendData(wsheader_type::BINARY_FRAME, message,
|
|
_enablePerMessageDeflate, onProgressCallback);
|
|
}
|
|
|
|
WebSocketSendInfo WebSocketTransport::sendText(
|
|
const std::string& message,
|
|
const OnProgressCallback& onProgressCallback)
|
|
|
|
{
|
|
return sendData(wsheader_type::TEXT_FRAME, message,
|
|
_enablePerMessageDeflate, onProgressCallback);
|
|
}
|
|
|
|
void WebSocketTransport::sendOnSocket()
|
|
{
|
|
std::lock_guard<std::mutex> lock(_txbufMutex);
|
|
|
|
while (_txbuf.size())
|
|
{
|
|
ssize_t ret = _socket->send((char*)&_txbuf[0], _txbuf.size());
|
|
|
|
if (ret < 0 && Socket::isWaitNeeded())
|
|
{
|
|
break;
|
|
}
|
|
else if (ret <= 0)
|
|
{
|
|
_socket->close();
|
|
|
|
setReadyState(CLOSED);
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
_txbuf.erase(_txbuf.begin(), _txbuf.begin() + ret);
|
|
}
|
|
}
|
|
}
|
|
|
|
void WebSocketTransport::close(uint16_t code, const std::string& reason, size_t closeWireSize, bool remote)
|
|
{
|
|
_requestInitCancellation = true;
|
|
|
|
if (_readyState == CLOSING || _readyState == CLOSED) return;
|
|
|
|
// See list of close events here:
|
|
// https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent
|
|
|
|
int codeLength = 2;
|
|
std::string closure{(char)(code >> 8), (char)(code & 0xff)};
|
|
closure.resize(codeLength + reason.size());
|
|
|
|
// copy reason after code
|
|
closure.replace(codeLength, reason.size(), reason);
|
|
|
|
bool compress = false;
|
|
sendData(wsheader_type::CLOSE, closure, compress);
|
|
setReadyState(CLOSING);
|
|
|
|
_socket->wakeUpFromPoll(Socket::kCloseRequest);
|
|
_socket->close();
|
|
|
|
{
|
|
std::lock_guard<std::mutex> lock(_closeDataMutex);
|
|
_closeCode = code;
|
|
_closeReason = reason;
|
|
_closeWireSize = closeWireSize;
|
|
_closeRemote = remote;
|
|
}
|
|
|
|
setReadyState(CLOSED);
|
|
}
|
|
|
|
size_t WebSocketTransport::bufferedAmount() const
|
|
{
|
|
std::lock_guard<std::mutex> lock(_txbufMutex);
|
|
return _txbuf.size();
|
|
}
|
|
|
|
} // namespace ix
|