1 |
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2 |
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3 | 'use strict';
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4 |
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5 | const EventEmitter = require('events');
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6 | const https = require('https');
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7 | const http = require('http');
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8 | const net = require('net');
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9 | const tls = require('tls');
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10 | const { randomBytes, createHash } = require('crypto');
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11 | const { Duplex, Readable } = require('stream');
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12 | const { URL } = require('url');
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13 |
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14 | const PerMessageDeflate = require('./permessage-deflate');
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15 | const Receiver = require('./receiver');
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16 | const Sender = require('./sender');
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17 | const {
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18 | BINARY_TYPES,
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19 | EMPTY_BUFFER,
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20 | GUID,
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21 | kForOnEventAttribute,
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22 | kListener,
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23 | kStatusCode,
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24 | kWebSocket,
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25 | NOOP
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26 | } = require('./constants');
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27 | const {
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28 | EventTarget: { addEventListener, removeEventListener }
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29 | } = require('./event-target');
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30 | const { format, parse } = require('./extension');
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31 | const { toBuffer } = require('./buffer-util');
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32 |
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33 | const closeTimeout = 30 * 1000;
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34 | const kAborted = Symbol('kAborted');
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35 | const protocolVersions = [8, 13];
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36 | const readyStates = ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED'];
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37 | const subprotocolRegex = /^[!#$%&'*+\-.0-9A-Z^_`|a-z~]+$/;
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38 |
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39 |
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40 |
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41 |
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42 |
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43 |
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44 | class WebSocket extends EventEmitter {
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45 | |
46 |
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47 |
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48 |
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49 |
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50 |
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51 |
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52 | constructor(address, protocols, options) {
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53 | super();
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54 |
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55 | this._binaryType = BINARY_TYPES[0];
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56 | this._closeCode = 1006;
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57 | this._closeFrameReceived = false;
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58 | this._closeFrameSent = false;
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59 | this._closeMessage = EMPTY_BUFFER;
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60 | this._closeTimer = null;
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61 | this._extensions = {};
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62 | this._paused = false;
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63 | this._protocol = '';
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64 | this._readyState = WebSocket.CONNECTING;
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65 | this._receiver = null;
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66 | this._sender = null;
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67 | this._socket = null;
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68 |
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69 | if (address !== null) {
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70 | this._bufferedAmount = 0;
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71 | this._isServer = false;
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72 | this._redirects = 0;
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73 |
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74 | if (protocols === undefined) {
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75 | protocols = [];
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76 | } else if (!Array.isArray(protocols)) {
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77 | if (typeof protocols === 'object' && protocols !== null) {
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78 | options = protocols;
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79 | protocols = [];
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80 | } else {
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81 | protocols = [protocols];
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82 | }
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83 | }
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84 |
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85 | initAsClient(this, address, protocols, options);
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86 | } else {
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87 | this._autoPong = options.autoPong;
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88 | this._isServer = true;
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89 | }
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90 | }
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91 |
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92 | |
93 |
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94 |
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95 |
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96 |
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97 |
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98 |
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99 | get binaryType() {
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100 | return this._binaryType;
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101 | }
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102 |
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103 | set binaryType(type) {
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104 | if (!BINARY_TYPES.includes(type)) return;
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105 |
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106 | this._binaryType = type;
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107 |
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108 |
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109 |
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110 |
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111 | if (this._receiver) this._receiver._binaryType = type;
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112 | }
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113 |
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114 | |
115 |
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116 |
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117 | get bufferedAmount() {
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118 | if (!this._socket) return this._bufferedAmount;
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119 |
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120 | return this._socket._writableState.length + this._sender._bufferedBytes;
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121 | }
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122 |
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123 | |
124 |
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125 |
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126 | get extensions() {
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127 | return Object.keys(this._extensions).join();
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128 | }
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129 |
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130 | |
131 |
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132 |
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133 | get isPaused() {
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134 | return this._paused;
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135 | }
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136 |
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137 | |
138 |
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139 |
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140 |
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141 | get onclose() {
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142 | return null;
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143 | }
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144 |
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145 | |
146 |
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147 |
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148 |
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149 | get onerror() {
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150 | return null;
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151 | }
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152 |
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153 | |
154 |
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155 |
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156 |
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157 | get onopen() {
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158 | return null;
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159 | }
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160 |
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161 | |
162 |
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163 |
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164 |
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165 | get onmessage() {
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166 | return null;
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167 | }
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168 |
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169 | |
170 |
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171 |
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172 | get protocol() {
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173 | return this._protocol;
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174 | }
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175 |
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176 | |
177 |
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178 |
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179 | get readyState() {
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180 | return this._readyState;
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181 | }
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182 |
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183 | |
184 |
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185 |
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186 | get url() {
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187 | return this._url;
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188 | }
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189 |
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190 | |
191 |
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192 |
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193 |
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194 |
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195 |
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196 |
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197 |
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198 |
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199 |
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200 |
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201 |
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202 |
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203 |
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204 |
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205 |
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206 | setSocket(socket, head, options) {
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207 | const receiver = new Receiver({
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208 | allowSynchronousEvents: options.allowSynchronousEvents,
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209 | binaryType: this.binaryType,
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210 | extensions: this._extensions,
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211 | isServer: this._isServer,
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212 | maxPayload: options.maxPayload,
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213 | skipUTF8Validation: options.skipUTF8Validation
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214 | });
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215 |
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216 | this._sender = new Sender(socket, this._extensions, options.generateMask);
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217 | this._receiver = receiver;
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218 | this._socket = socket;
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219 |
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220 | receiver[kWebSocket] = this;
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221 | socket[kWebSocket] = this;
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222 |
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223 | receiver.on('conclude', receiverOnConclude);
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224 | receiver.on('drain', receiverOnDrain);
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225 | receiver.on('error', receiverOnError);
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226 | receiver.on('message', receiverOnMessage);
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227 | receiver.on('ping', receiverOnPing);
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228 | receiver.on('pong', receiverOnPong);
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229 |
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230 |
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231 |
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232 |
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233 | if (socket.setTimeout) socket.setTimeout(0);
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234 | if (socket.setNoDelay) socket.setNoDelay();
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235 |
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236 | if (head.length > 0) socket.unshift(head);
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237 |
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238 | socket.on('close', socketOnClose);
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239 | socket.on('data', socketOnData);
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240 | socket.on('end', socketOnEnd);
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241 | socket.on('error', socketOnError);
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242 |
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243 | this._readyState = WebSocket.OPEN;
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244 | this.emit('open');
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245 | }
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246 |
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247 | |
248 |
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249 |
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250 |
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251 |
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252 | emitClose() {
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253 | if (!this._socket) {
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254 | this._readyState = WebSocket.CLOSED;
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255 | this.emit('close', this._closeCode, this._closeMessage);
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256 | return;
|
257 | }
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258 |
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259 | if (this._extensions[PerMessageDeflate.extensionName]) {
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260 | this._extensions[PerMessageDeflate.extensionName].cleanup();
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261 | }
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262 |
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263 | this._receiver.removeAllListeners();
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264 | this._readyState = WebSocket.CLOSED;
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265 | this.emit('close', this._closeCode, this._closeMessage);
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266 | }
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267 |
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268 | |
269 |
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270 |
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271 |
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272 |
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273 |
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274 |
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275 |
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276 |
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277 |
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278 |
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279 |
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280 |
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281 |
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282 |
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283 |
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284 |
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285 |
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286 |
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287 |
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288 | close(code, data) {
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289 | if (this.readyState === WebSocket.CLOSED) return;
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290 | if (this.readyState === WebSocket.CONNECTING) {
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291 | const msg = 'WebSocket was closed before the connection was established';
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292 | abortHandshake(this, this._req, msg);
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293 | return;
|
294 | }
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295 |
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296 | if (this.readyState === WebSocket.CLOSING) {
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297 | if (
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298 | this._closeFrameSent &&
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299 | (this._closeFrameReceived || this._receiver._writableState.errorEmitted)
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300 | ) {
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301 | this._socket.end();
|
302 | }
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303 |
|
304 | return;
|
305 | }
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306 |
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307 | this._readyState = WebSocket.CLOSING;
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308 | this._sender.close(code, data, !this._isServer, (err) => {
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309 |
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310 |
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311 |
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312 |
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313 | if (err) return;
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314 |
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315 | this._closeFrameSent = true;
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316 |
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317 | if (
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318 | this._closeFrameReceived ||
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319 | this._receiver._writableState.errorEmitted
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320 | ) {
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321 | this._socket.end();
|
322 | }
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323 | });
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324 |
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325 |
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326 |
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327 |
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328 | this._closeTimer = setTimeout(
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329 | this._socket.destroy.bind(this._socket),
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330 | closeTimeout
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331 | );
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332 | }
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333 |
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334 | |
335 |
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336 |
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337 |
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338 |
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339 | pause() {
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340 | if (
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341 | this.readyState === WebSocket.CONNECTING ||
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342 | this.readyState === WebSocket.CLOSED
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343 | ) {
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344 | return;
|
345 | }
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346 |
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347 | this._paused = true;
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348 | this._socket.pause();
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349 | }
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350 |
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351 | |
352 |
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353 |
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354 |
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355 |
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356 |
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357 |
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358 |
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359 | ping(data, mask, cb) {
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360 | if (this.readyState === WebSocket.CONNECTING) {
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361 | throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
|
362 | }
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363 |
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364 | if (typeof data === 'function') {
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365 | cb = data;
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366 | data = mask = undefined;
|
367 | } else if (typeof mask === 'function') {
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368 | cb = mask;
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369 | mask = undefined;
|
370 | }
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371 |
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372 | if (typeof data === 'number') data = data.toString();
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373 |
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374 | if (this.readyState !== WebSocket.OPEN) {
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375 | sendAfterClose(this, data, cb);
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376 | return;
|
377 | }
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378 |
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379 | if (mask === undefined) mask = !this._isServer;
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380 | this._sender.ping(data || EMPTY_BUFFER, mask, cb);
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381 | }
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382 |
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383 | |
384 |
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385 |
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386 |
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387 |
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388 |
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389 |
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390 |
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391 | pong(data, mask, cb) {
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392 | if (this.readyState === WebSocket.CONNECTING) {
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393 | throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
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394 | }
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395 |
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396 | if (typeof data === 'function') {
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397 | cb = data;
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398 | data = mask = undefined;
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399 | } else if (typeof mask === 'function') {
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400 | cb = mask;
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401 | mask = undefined;
|
402 | }
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403 |
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404 | if (typeof data === 'number') data = data.toString();
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405 |
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406 | if (this.readyState !== WebSocket.OPEN) {
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407 | sendAfterClose(this, data, cb);
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408 | return;
|
409 | }
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410 |
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411 | if (mask === undefined) mask = !this._isServer;
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412 | this._sender.pong(data || EMPTY_BUFFER, mask, cb);
|
413 | }
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414 |
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415 | |
416 |
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417 |
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418 |
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419 |
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420 | resume() {
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421 | if (
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422 | this.readyState === WebSocket.CONNECTING ||
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423 | this.readyState === WebSocket.CLOSED
|
424 | ) {
|
425 | return;
|
426 | }
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427 |
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428 | this._paused = false;
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429 | if (!this._receiver._writableState.needDrain) this._socket.resume();
|
430 | }
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431 |
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432 | |
433 |
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434 |
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435 |
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436 |
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437 |
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438 |
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439 |
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440 |
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441 |
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442 |
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443 |
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444 |
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445 |
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446 |
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447 | send(data, options, cb) {
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448 | if (this.readyState === WebSocket.CONNECTING) {
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449 | throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
|
450 | }
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451 |
|
452 | if (typeof options === 'function') {
|
453 | cb = options;
|
454 | options = {};
|
455 | }
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456 |
|
457 | if (typeof data === 'number') data = data.toString();
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458 |
|
459 | if (this.readyState !== WebSocket.OPEN) {
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460 | sendAfterClose(this, data, cb);
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461 | return;
|
462 | }
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463 |
|
464 | const opts = {
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465 | binary: typeof data !== 'string',
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466 | mask: !this._isServer,
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467 | compress: true,
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468 | fin: true,
|
469 | ...options
|
470 | };
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471 |
|
472 | if (!this._extensions[PerMessageDeflate.extensionName]) {
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473 | opts.compress = false;
|
474 | }
|
475 |
|
476 | this._sender.send(data || EMPTY_BUFFER, opts, cb);
|
477 | }
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478 |
|
479 | |
480 |
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481 |
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482 |
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483 |
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484 | terminate() {
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485 | if (this.readyState === WebSocket.CLOSED) return;
|
486 | if (this.readyState === WebSocket.CONNECTING) {
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487 | const msg = 'WebSocket was closed before the connection was established';
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488 | abortHandshake(this, this._req, msg);
|
489 | return;
|
490 | }
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491 |
|
492 | if (this._socket) {
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493 | this._readyState = WebSocket.CLOSING;
|
494 | this._socket.destroy();
|
495 | }
|
496 | }
|
497 | }
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498 |
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499 |
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500 |
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501 |
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502 |
|
503 | Object.defineProperty(WebSocket, 'CONNECTING', {
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504 | enumerable: true,
|
505 | value: readyStates.indexOf('CONNECTING')
|
506 | });
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507 |
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508 |
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509 |
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510 |
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511 |
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512 | Object.defineProperty(WebSocket.prototype, 'CONNECTING', {
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513 | enumerable: true,
|
514 | value: readyStates.indexOf('CONNECTING')
|
515 | });
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516 |
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517 |
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518 |
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519 |
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520 |
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521 | Object.defineProperty(WebSocket, 'OPEN', {
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522 | enumerable: true,
|
523 | value: readyStates.indexOf('OPEN')
|
524 | });
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525 |
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526 |
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527 |
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528 |
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529 |
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530 | Object.defineProperty(WebSocket.prototype, 'OPEN', {
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531 | enumerable: true,
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532 | value: readyStates.indexOf('OPEN')
|
533 | });
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534 |
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535 |
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536 |
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537 |
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538 |
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539 | Object.defineProperty(WebSocket, 'CLOSING', {
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540 | enumerable: true,
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541 | value: readyStates.indexOf('CLOSING')
|
542 | });
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543 |
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544 |
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545 |
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546 |
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547 |
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548 | Object.defineProperty(WebSocket.prototype, 'CLOSING', {
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549 | enumerable: true,
|
550 | value: readyStates.indexOf('CLOSING')
|
551 | });
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552 |
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553 |
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554 |
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555 |
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556 |
|
557 | Object.defineProperty(WebSocket, 'CLOSED', {
|
558 | enumerable: true,
|
559 | value: readyStates.indexOf('CLOSED')
|
560 | });
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561 |
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562 |
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563 |
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564 |
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565 |
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566 | Object.defineProperty(WebSocket.prototype, 'CLOSED', {
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567 | enumerable: true,
|
568 | value: readyStates.indexOf('CLOSED')
|
569 | });
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570 |
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571 | [
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572 | 'binaryType',
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573 | 'bufferedAmount',
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574 | 'extensions',
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575 | 'isPaused',
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576 | 'protocol',
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577 | 'readyState',
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578 | 'url'
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579 | ].forEach((property) => {
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580 | Object.defineProperty(WebSocket.prototype, property, { enumerable: true });
|
581 | });
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582 |
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583 |
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584 |
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585 |
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586 |
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587 | ['open', 'error', 'close', 'message'].forEach((method) => {
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588 | Object.defineProperty(WebSocket.prototype, `on${method}`, {
|
589 | enumerable: true,
|
590 | get() {
|
591 | for (const listener of this.listeners(method)) {
|
592 | if (listener[kForOnEventAttribute]) return listener[kListener];
|
593 | }
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594 |
|
595 | return null;
|
596 | },
|
597 | set(handler) {
|
598 | for (const listener of this.listeners(method)) {
|
599 | if (listener[kForOnEventAttribute]) {
|
600 | this.removeListener(method, listener);
|
601 | break;
|
602 | }
|
603 | }
|
604 |
|
605 | if (typeof handler !== 'function') return;
|
606 |
|
607 | this.addEventListener(method, handler, {
|
608 | [kForOnEventAttribute]: true
|
609 | });
|
610 | }
|
611 | });
|
612 | });
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613 |
|
614 | WebSocket.prototype.addEventListener = addEventListener;
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615 | WebSocket.prototype.removeEventListener = removeEventListener;
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616 |
|
617 | module.exports = WebSocket;
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618 |
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619 |
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620 |
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621 |
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622 |
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623 |
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624 |
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625 |
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626 |
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627 |
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628 |
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629 |
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630 |
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631 |
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632 |
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633 |
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634 |
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635 |
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636 |
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637 |
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638 |
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639 |
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640 |
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641 |
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642 |
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643 |
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644 |
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645 |
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646 |
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647 |
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648 |
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649 |
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650 |
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651 |
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652 |
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653 | function initAsClient(websocket, address, protocols, options) {
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654 | const opts = {
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655 | allowSynchronousEvents: true,
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656 | autoPong: true,
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657 | protocolVersion: protocolVersions[1],
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658 | maxPayload: 100 * 1024 * 1024,
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659 | skipUTF8Validation: false,
|
660 | perMessageDeflate: true,
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661 | followRedirects: false,
|
662 | maxRedirects: 10,
|
663 | ...options,
|
664 | socketPath: undefined,
|
665 | hostname: undefined,
|
666 | protocol: undefined,
|
667 | timeout: undefined,
|
668 | method: 'GET',
|
669 | host: undefined,
|
670 | path: undefined,
|
671 | port: undefined
|
672 | };
|
673 |
|
674 | websocket._autoPong = opts.autoPong;
|
675 |
|
676 | if (!protocolVersions.includes(opts.protocolVersion)) {
|
677 | throw new RangeError(
|
678 | `Unsupported protocol version: ${opts.protocolVersion} ` +
|
679 | `(supported versions: ${protocolVersions.join(', ')})`
|
680 | );
|
681 | }
|
682 |
|
683 | let parsedUrl;
|
684 |
|
685 | if (address instanceof URL) {
|
686 | parsedUrl = address;
|
687 | } else {
|
688 | try {
|
689 | parsedUrl = new URL(address);
|
690 | } catch (e) {
|
691 | throw new SyntaxError(`Invalid URL: ${address}`);
|
692 | }
|
693 | }
|
694 |
|
695 | if (parsedUrl.protocol === 'http:') {
|
696 | parsedUrl.protocol = 'ws:';
|
697 | } else if (parsedUrl.protocol === 'https:') {
|
698 | parsedUrl.protocol = 'wss:';
|
699 | }
|
700 |
|
701 | websocket._url = parsedUrl.href;
|
702 |
|
703 | const isSecure = parsedUrl.protocol === 'wss:';
|
704 | const isIpcUrl = parsedUrl.protocol === 'ws+unix:';
|
705 | let invalidUrlMessage;
|
706 |
|
707 | if (parsedUrl.protocol !== 'ws:' && !isSecure && !isIpcUrl) {
|
708 | invalidUrlMessage =
|
709 | 'The URL\'s protocol must be one of "ws:", "wss:", ' +
|
710 | '"http:", "https", or "ws+unix:"';
|
711 | } else if (isIpcUrl && !parsedUrl.pathname) {
|
712 | invalidUrlMessage = "The URL's pathname is empty";
|
713 | } else if (parsedUrl.hash) {
|
714 | invalidUrlMessage = 'The URL contains a fragment identifier';
|
715 | }
|
716 |
|
717 | if (invalidUrlMessage) {
|
718 | const err = new SyntaxError(invalidUrlMessage);
|
719 |
|
720 | if (websocket._redirects === 0) {
|
721 | throw err;
|
722 | } else {
|
723 | emitErrorAndClose(websocket, err);
|
724 | return;
|
725 | }
|
726 | }
|
727 |
|
728 | const defaultPort = isSecure ? 443 : 80;
|
729 | const key = randomBytes(16).toString('base64');
|
730 | const request = isSecure ? https.request : http.request;
|
731 | const protocolSet = new Set();
|
732 | let perMessageDeflate;
|
733 |
|
734 | opts.createConnection =
|
735 | opts.createConnection || (isSecure ? tlsConnect : netConnect);
|
736 | opts.defaultPort = opts.defaultPort || defaultPort;
|
737 | opts.port = parsedUrl.port || defaultPort;
|
738 | opts.host = parsedUrl.hostname.startsWith('[')
|
739 | ? parsedUrl.hostname.slice(1, -1)
|
740 | : parsedUrl.hostname;
|
741 | opts.headers = {
|
742 | ...opts.headers,
|
743 | 'Sec-WebSocket-Version': opts.protocolVersion,
|
744 | 'Sec-WebSocket-Key': key,
|
745 | Connection: 'Upgrade',
|
746 | Upgrade: 'websocket'
|
747 | };
|
748 | opts.path = parsedUrl.pathname + parsedUrl.search;
|
749 | opts.timeout = opts.handshakeTimeout;
|
750 |
|
751 | if (opts.perMessageDeflate) {
|
752 | perMessageDeflate = new PerMessageDeflate(
|
753 | opts.perMessageDeflate !== true ? opts.perMessageDeflate : {},
|
754 | false,
|
755 | opts.maxPayload
|
756 | );
|
757 | opts.headers['Sec-WebSocket-Extensions'] = format({
|
758 | [PerMessageDeflate.extensionName]: perMessageDeflate.offer()
|
759 | });
|
760 | }
|
761 | if (protocols.length) {
|
762 | for (const protocol of protocols) {
|
763 | if (
|
764 | typeof protocol !== 'string' ||
|
765 | !subprotocolRegex.test(protocol) ||
|
766 | protocolSet.has(protocol)
|
767 | ) {
|
768 | throw new SyntaxError(
|
769 | 'An invalid or duplicated subprotocol was specified'
|
770 | );
|
771 | }
|
772 |
|
773 | protocolSet.add(protocol);
|
774 | }
|
775 |
|
776 | opts.headers['Sec-WebSocket-Protocol'] = protocols.join(',');
|
777 | }
|
778 | if (opts.origin) {
|
779 | if (opts.protocolVersion < 13) {
|
780 | opts.headers['Sec-WebSocket-Origin'] = opts.origin;
|
781 | } else {
|
782 | opts.headers.Origin = opts.origin;
|
783 | }
|
784 | }
|
785 | if (parsedUrl.username || parsedUrl.password) {
|
786 | opts.auth = `${parsedUrl.username}:${parsedUrl.password}`;
|
787 | }
|
788 |
|
789 | if (isIpcUrl) {
|
790 | const parts = opts.path.split(':');
|
791 |
|
792 | opts.socketPath = parts[0];
|
793 | opts.path = parts[1];
|
794 | }
|
795 |
|
796 | let req;
|
797 |
|
798 | if (opts.followRedirects) {
|
799 | if (websocket._redirects === 0) {
|
800 | websocket._originalIpc = isIpcUrl;
|
801 | websocket._originalSecure = isSecure;
|
802 | websocket._originalHostOrSocketPath = isIpcUrl
|
803 | ? opts.socketPath
|
804 | : parsedUrl.host;
|
805 |
|
806 | const headers = options && options.headers;
|
807 |
|
808 |
|
809 |
|
810 |
|
811 |
|
812 | options = { ...options, headers: {} };
|
813 |
|
814 | if (headers) {
|
815 | for (const [key, value] of Object.entries(headers)) {
|
816 | options.headers[key.toLowerCase()] = value;
|
817 | }
|
818 | }
|
819 | } else if (websocket.listenerCount('redirect') === 0) {
|
820 | const isSameHost = isIpcUrl
|
821 | ? websocket._originalIpc
|
822 | ? opts.socketPath === websocket._originalHostOrSocketPath
|
823 | : false
|
824 | : websocket._originalIpc
|
825 | ? false
|
826 | : parsedUrl.host === websocket._originalHostOrSocketPath;
|
827 |
|
828 | if (!isSameHost || (websocket._originalSecure && !isSecure)) {
|
829 |
|
830 |
|
831 |
|
832 |
|
833 | delete opts.headers.authorization;
|
834 | delete opts.headers.cookie;
|
835 |
|
836 | if (!isSameHost) delete opts.headers.host;
|
837 |
|
838 | opts.auth = undefined;
|
839 | }
|
840 | }
|
841 |
|
842 |
|
843 |
|
844 |
|
845 |
|
846 |
|
847 | if (opts.auth && !options.headers.authorization) {
|
848 | options.headers.authorization =
|
849 | 'Basic ' + Buffer.from(opts.auth).toString('base64');
|
850 | }
|
851 |
|
852 | req = websocket._req = request(opts);
|
853 |
|
854 | if (websocket._redirects) {
|
855 |
|
856 |
|
857 |
|
858 |
|
859 |
|
860 |
|
861 |
|
862 |
|
863 |
|
864 | websocket.emit('redirect', websocket.url, req);
|
865 | }
|
866 | } else {
|
867 | req = websocket._req = request(opts);
|
868 | }
|
869 |
|
870 | if (opts.timeout) {
|
871 | req.on('timeout', () => {
|
872 | abortHandshake(websocket, req, 'Opening handshake has timed out');
|
873 | });
|
874 | }
|
875 |
|
876 | req.on('error', (err) => {
|
877 | if (req === null || req[kAborted]) return;
|
878 |
|
879 | req = websocket._req = null;
|
880 | emitErrorAndClose(websocket, err);
|
881 | });
|
882 |
|
883 | req.on('response', (res) => {
|
884 | const location = res.headers.location;
|
885 | const statusCode = res.statusCode;
|
886 |
|
887 | if (
|
888 | location &&
|
889 | opts.followRedirects &&
|
890 | statusCode >= 300 &&
|
891 | statusCode < 400
|
892 | ) {
|
893 | if (++websocket._redirects > opts.maxRedirects) {
|
894 | abortHandshake(websocket, req, 'Maximum redirects exceeded');
|
895 | return;
|
896 | }
|
897 |
|
898 | req.abort();
|
899 |
|
900 | let addr;
|
901 |
|
902 | try {
|
903 | addr = new URL(location, address);
|
904 | } catch (e) {
|
905 | const err = new SyntaxError(`Invalid URL: ${location}`);
|
906 | emitErrorAndClose(websocket, err);
|
907 | return;
|
908 | }
|
909 |
|
910 | initAsClient(websocket, addr, protocols, options);
|
911 | } else if (!websocket.emit('unexpected-response', req, res)) {
|
912 | abortHandshake(
|
913 | websocket,
|
914 | req,
|
915 | `Unexpected server response: ${res.statusCode}`
|
916 | );
|
917 | }
|
918 | });
|
919 |
|
920 | req.on('upgrade', (res, socket, head) => {
|
921 | websocket.emit('upgrade', res);
|
922 |
|
923 |
|
924 |
|
925 |
|
926 |
|
927 | if (websocket.readyState !== WebSocket.CONNECTING) return;
|
928 |
|
929 | req = websocket._req = null;
|
930 |
|
931 | const upgrade = res.headers.upgrade;
|
932 |
|
933 | if (upgrade === undefined || upgrade.toLowerCase() !== 'websocket') {
|
934 | abortHandshake(websocket, socket, 'Invalid Upgrade header');
|
935 | return;
|
936 | }
|
937 |
|
938 | const digest = createHash('sha1')
|
939 | .update(key + GUID)
|
940 | .digest('base64');
|
941 |
|
942 | if (res.headers['sec-websocket-accept'] !== digest) {
|
943 | abortHandshake(websocket, socket, 'Invalid Sec-WebSocket-Accept header');
|
944 | return;
|
945 | }
|
946 |
|
947 | const serverProt = res.headers['sec-websocket-protocol'];
|
948 | let protError;
|
949 |
|
950 | if (serverProt !== undefined) {
|
951 | if (!protocolSet.size) {
|
952 | protError = 'Server sent a subprotocol but none was requested';
|
953 | } else if (!protocolSet.has(serverProt)) {
|
954 | protError = 'Server sent an invalid subprotocol';
|
955 | }
|
956 | } else if (protocolSet.size) {
|
957 | protError = 'Server sent no subprotocol';
|
958 | }
|
959 |
|
960 | if (protError) {
|
961 | abortHandshake(websocket, socket, protError);
|
962 | return;
|
963 | }
|
964 |
|
965 | if (serverProt) websocket._protocol = serverProt;
|
966 |
|
967 | const secWebSocketExtensions = res.headers['sec-websocket-extensions'];
|
968 |
|
969 | if (secWebSocketExtensions !== undefined) {
|
970 | if (!perMessageDeflate) {
|
971 | const message =
|
972 | 'Server sent a Sec-WebSocket-Extensions header but no extension ' +
|
973 | 'was requested';
|
974 | abortHandshake(websocket, socket, message);
|
975 | return;
|
976 | }
|
977 |
|
978 | let extensions;
|
979 |
|
980 | try {
|
981 | extensions = parse(secWebSocketExtensions);
|
982 | } catch (err) {
|
983 | const message = 'Invalid Sec-WebSocket-Extensions header';
|
984 | abortHandshake(websocket, socket, message);
|
985 | return;
|
986 | }
|
987 |
|
988 | const extensionNames = Object.keys(extensions);
|
989 |
|
990 | if (
|
991 | extensionNames.length !== 1 ||
|
992 | extensionNames[0] !== PerMessageDeflate.extensionName
|
993 | ) {
|
994 | const message = 'Server indicated an extension that was not requested';
|
995 | abortHandshake(websocket, socket, message);
|
996 | return;
|
997 | }
|
998 |
|
999 | try {
|
1000 | perMessageDeflate.accept(extensions[PerMessageDeflate.extensionName]);
|
1001 | } catch (err) {
|
1002 | const message = 'Invalid Sec-WebSocket-Extensions header';
|
1003 | abortHandshake(websocket, socket, message);
|
1004 | return;
|
1005 | }
|
1006 |
|
1007 | websocket._extensions[PerMessageDeflate.extensionName] =
|
1008 | perMessageDeflate;
|
1009 | }
|
1010 |
|
1011 | websocket.setSocket(socket, head, {
|
1012 | allowSynchronousEvents: opts.allowSynchronousEvents,
|
1013 | generateMask: opts.generateMask,
|
1014 | maxPayload: opts.maxPayload,
|
1015 | skipUTF8Validation: opts.skipUTF8Validation
|
1016 | });
|
1017 | });
|
1018 |
|
1019 | if (opts.finishRequest) {
|
1020 | opts.finishRequest(req, websocket);
|
1021 | } else {
|
1022 | req.end();
|
1023 | }
|
1024 | }
|
1025 |
|
1026 |
|
1027 |
|
1028 |
|
1029 |
|
1030 |
|
1031 |
|
1032 |
|
1033 | function emitErrorAndClose(websocket, err) {
|
1034 | websocket._readyState = WebSocket.CLOSING;
|
1035 | websocket.emit('error', err);
|
1036 | websocket.emitClose();
|
1037 | }
|
1038 |
|
1039 |
|
1040 |
|
1041 |
|
1042 |
|
1043 |
|
1044 |
|
1045 |
|
1046 | function netConnect(options) {
|
1047 | options.path = options.socketPath;
|
1048 | return net.connect(options);
|
1049 | }
|
1050 |
|
1051 |
|
1052 |
|
1053 |
|
1054 |
|
1055 |
|
1056 |
|
1057 |
|
1058 | function tlsConnect(options) {
|
1059 | options.path = undefined;
|
1060 |
|
1061 | if (!options.servername && options.servername !== '') {
|
1062 | options.servername = net.isIP(options.host) ? '' : options.host;
|
1063 | }
|
1064 |
|
1065 | return tls.connect(options);
|
1066 | }
|
1067 |
|
1068 |
|
1069 |
|
1070 |
|
1071 |
|
1072 |
|
1073 |
|
1074 |
|
1075 |
|
1076 |
|
1077 | function abortHandshake(websocket, stream, message) {
|
1078 | websocket._readyState = WebSocket.CLOSING;
|
1079 |
|
1080 | const err = new Error(message);
|
1081 | Error.captureStackTrace(err, abortHandshake);
|
1082 |
|
1083 | if (stream.setHeader) {
|
1084 | stream[kAborted] = true;
|
1085 | stream.abort();
|
1086 |
|
1087 | if (stream.socket && !stream.socket.destroyed) {
|
1088 |
|
1089 |
|
1090 |
|
1091 |
|
1092 |
|
1093 | stream.socket.destroy();
|
1094 | }
|
1095 |
|
1096 | process.nextTick(emitErrorAndClose, websocket, err);
|
1097 | } else {
|
1098 | stream.destroy(err);
|
1099 | stream.once('error', websocket.emit.bind(websocket, 'error'));
|
1100 | stream.once('close', websocket.emitClose.bind(websocket));
|
1101 | }
|
1102 | }
|
1103 |
|
1104 |
|
1105 |
|
1106 |
|
1107 |
|
1108 |
|
1109 |
|
1110 |
|
1111 |
|
1112 |
|
1113 | function sendAfterClose(websocket, data, cb) {
|
1114 | if (data) {
|
1115 | const length = toBuffer(data).length;
|
1116 |
|
1117 |
|
1118 |
|
1119 |
|
1120 |
|
1121 |
|
1122 |
|
1123 | if (websocket._socket) websocket._sender._bufferedBytes += length;
|
1124 | else websocket._bufferedAmount += length;
|
1125 | }
|
1126 |
|
1127 | if (cb) {
|
1128 | const err = new Error(
|
1129 | `WebSocket is not open: readyState ${websocket.readyState} ` +
|
1130 | `(${readyStates[websocket.readyState]})`
|
1131 | );
|
1132 | process.nextTick(cb, err);
|
1133 | }
|
1134 | }
|
1135 |
|
1136 |
|
1137 |
|
1138 |
|
1139 |
|
1140 |
|
1141 |
|
1142 |
|
1143 | function receiverOnConclude(code, reason) {
|
1144 | const websocket = this[kWebSocket];
|
1145 |
|
1146 | websocket._closeFrameReceived = true;
|
1147 | websocket._closeMessage = reason;
|
1148 | websocket._closeCode = code;
|
1149 |
|
1150 | if (websocket._socket[kWebSocket] === undefined) return;
|
1151 |
|
1152 | websocket._socket.removeListener('data', socketOnData);
|
1153 | process.nextTick(resume, websocket._socket);
|
1154 |
|
1155 | if (code === 1005) websocket.close();
|
1156 | else websocket.close(code, reason);
|
1157 | }
|
1158 |
|
1159 |
|
1160 |
|
1161 |
|
1162 |
|
1163 |
|
1164 | function receiverOnDrain() {
|
1165 | const websocket = this[kWebSocket];
|
1166 |
|
1167 | if (!websocket.isPaused) websocket._socket.resume();
|
1168 | }
|
1169 |
|
1170 |
|
1171 |
|
1172 |
|
1173 |
|
1174 |
|
1175 |
|
1176 | function receiverOnError(err) {
|
1177 | const websocket = this[kWebSocket];
|
1178 |
|
1179 | if (websocket._socket[kWebSocket] !== undefined) {
|
1180 | websocket._socket.removeListener('data', socketOnData);
|
1181 |
|
1182 |
|
1183 |
|
1184 |
|
1185 |
|
1186 | process.nextTick(resume, websocket._socket);
|
1187 |
|
1188 | websocket.close(err[kStatusCode]);
|
1189 | }
|
1190 |
|
1191 | websocket.emit('error', err);
|
1192 | }
|
1193 |
|
1194 |
|
1195 |
|
1196 |
|
1197 |
|
1198 |
|
1199 | function receiverOnFinish() {
|
1200 | this[kWebSocket].emitClose();
|
1201 | }
|
1202 |
|
1203 |
|
1204 |
|
1205 |
|
1206 |
|
1207 |
|
1208 |
|
1209 |
|
1210 | function receiverOnMessage(data, isBinary) {
|
1211 | this[kWebSocket].emit('message', data, isBinary);
|
1212 | }
|
1213 |
|
1214 |
|
1215 |
|
1216 |
|
1217 |
|
1218 |
|
1219 |
|
1220 | function receiverOnPing(data) {
|
1221 | const websocket = this[kWebSocket];
|
1222 |
|
1223 | if (websocket._autoPong) websocket.pong(data, !this._isServer, NOOP);
|
1224 | websocket.emit('ping', data);
|
1225 | }
|
1226 |
|
1227 |
|
1228 |
|
1229 |
|
1230 |
|
1231 |
|
1232 |
|
1233 | function receiverOnPong(data) {
|
1234 | this[kWebSocket].emit('pong', data);
|
1235 | }
|
1236 |
|
1237 |
|
1238 |
|
1239 |
|
1240 |
|
1241 |
|
1242 |
|
1243 | function resume(stream) {
|
1244 | stream.resume();
|
1245 | }
|
1246 |
|
1247 |
|
1248 |
|
1249 |
|
1250 |
|
1251 |
|
1252 | function socketOnClose() {
|
1253 | const websocket = this[kWebSocket];
|
1254 |
|
1255 | this.removeListener('close', socketOnClose);
|
1256 | this.removeListener('data', socketOnData);
|
1257 | this.removeListener('end', socketOnEnd);
|
1258 |
|
1259 | websocket._readyState = WebSocket.CLOSING;
|
1260 |
|
1261 | let chunk;
|
1262 |
|
1263 |
|
1264 |
|
1265 |
|
1266 |
|
1267 |
|
1268 |
|
1269 |
|
1270 |
|
1271 |
|
1272 | if (
|
1273 | !this._readableState.endEmitted &&
|
1274 | !websocket._closeFrameReceived &&
|
1275 | !websocket._receiver._writableState.errorEmitted &&
|
1276 | (chunk = websocket._socket.read()) !== null
|
1277 | ) {
|
1278 | websocket._receiver.write(chunk);
|
1279 | }
|
1280 |
|
1281 | websocket._receiver.end();
|
1282 |
|
1283 | this[kWebSocket] = undefined;
|
1284 |
|
1285 | clearTimeout(websocket._closeTimer);
|
1286 |
|
1287 | if (
|
1288 | websocket._receiver._writableState.finished ||
|
1289 | websocket._receiver._writableState.errorEmitted
|
1290 | ) {
|
1291 | websocket.emitClose();
|
1292 | } else {
|
1293 | websocket._receiver.on('error', receiverOnFinish);
|
1294 | websocket._receiver.on('finish', receiverOnFinish);
|
1295 | }
|
1296 | }
|
1297 |
|
1298 |
|
1299 |
|
1300 |
|
1301 |
|
1302 |
|
1303 |
|
1304 | function socketOnData(chunk) {
|
1305 | if (!this[kWebSocket]._receiver.write(chunk)) {
|
1306 | this.pause();
|
1307 | }
|
1308 | }
|
1309 |
|
1310 |
|
1311 |
|
1312 |
|
1313 |
|
1314 |
|
1315 | function socketOnEnd() {
|
1316 | const websocket = this[kWebSocket];
|
1317 |
|
1318 | websocket._readyState = WebSocket.CLOSING;
|
1319 | websocket._receiver.end();
|
1320 | this.end();
|
1321 | }
|
1322 |
|
1323 |
|
1324 |
|
1325 |
|
1326 |
|
1327 |
|
1328 | function socketOnError() {
|
1329 | const websocket = this[kWebSocket];
|
1330 |
|
1331 | this.removeListener('error', socketOnError);
|
1332 | this.on('error', NOOP);
|
1333 |
|
1334 | if (websocket) {
|
1335 | websocket._readyState = WebSocket.CLOSING;
|
1336 | this.destroy();
|
1337 | }
|
1338 | }
|