1 | const { Parser, PROTOCOL_6, PROTOCOL_7 } = require('./protocol');
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2 |
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3 | const VERSION = process.env.npm_package_version;
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4 |
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5 | class Connector {
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6 | constructor (options, WebSocket, Timer, handlers) {
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7 | this.options = options;
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8 | this.WebSocket = WebSocket;
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9 | this.Timer = Timer;
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10 | this.handlers = handlers;
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11 | const path = this.options.path ? `${this.options.path}` : 'livereload';
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12 | this._uri = `ws${this.options.https ? 's' : ''}://${this.options.host}:${this.options.port}/${path}`;
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13 |
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14 | this._nextDelay = this.options.mindelay;
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15 | this._connectionDesired = false;
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16 | this.protocol = 0;
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17 |
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18 | this.protocolParser = new Parser({
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19 | connected: protocol => {
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20 | this.protocol = protocol;
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21 | this._handshakeTimeout.stop();
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22 | this._nextDelay = this.options.mindelay;
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23 | this._disconnectionReason = 'broken';
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24 |
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25 | return this.handlers.connected(this.protocol);
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26 | },
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27 | error: e => {
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28 | this.handlers.error(e);
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29 |
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30 | return this._closeOnError();
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31 | },
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32 | message: message => {
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33 | return this.handlers.message(message);
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34 | }
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35 | });
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36 |
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37 | this._handshakeTimeout = new this.Timer(() => {
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38 | if (!this._isSocketConnected()) {
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39 | return;
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40 | }
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41 |
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42 | this._disconnectionReason = 'handshake-timeout';
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43 |
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44 | return this.socket.close();
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45 | });
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46 |
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47 | this._reconnectTimer = new this.Timer(() => {
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48 | if (!this._connectionDesired) {
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49 |
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50 | return;
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51 | }
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52 |
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53 | return this.connect();
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54 | });
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55 |
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56 | this.connect();
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57 | }
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58 |
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59 | _isSocketConnected () {
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60 | return this.socket && (this.socket.readyState === this.WebSocket.OPEN);
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61 | }
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62 |
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63 | connect () {
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64 | this._connectionDesired = true;
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65 |
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66 | if (this._isSocketConnected()) {
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67 | return;
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68 | }
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69 |
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70 |
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71 | this._reconnectTimer.stop();
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72 | this._disconnectionReason = 'cannot-connect';
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73 | this.protocolParser.reset();
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74 |
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75 | this.handlers.connecting();
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76 |
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77 | this.socket = new this.WebSocket(this._uri);
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78 | this.socket.onopen = e => this._onopen(e);
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79 | this.socket.onclose = e => this._onclose(e);
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80 | this.socket.onmessage = e => this._onmessage(e);
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81 | this.socket.onerror = e => this._onerror(e);
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82 | }
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83 |
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84 | disconnect () {
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85 | this._connectionDesired = false;
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86 | this._reconnectTimer.stop();
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87 |
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88 | if (!this._isSocketConnected()) {
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89 | return;
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90 | }
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91 |
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92 | this._disconnectionReason = 'manual';
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93 |
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94 | return this.socket.close();
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95 | }
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96 |
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97 | _scheduleReconnection () {
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98 | if (!this._connectionDesired) {
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99 |
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100 | return;
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101 | }
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102 |
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103 | if (!this._reconnectTimer.running) {
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104 | this._reconnectTimer.start(this._nextDelay);
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105 | this._nextDelay = Math.min(this.options.maxdelay, this._nextDelay * 2);
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106 | }
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107 | }
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108 |
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109 | sendCommand (command) {
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110 | if (!this.protocol) {
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111 | return;
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112 | }
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113 |
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114 | return this._sendCommand(command);
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115 | }
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116 |
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117 | _sendCommand (command) {
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118 | return this.socket.send(JSON.stringify(command));
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119 | }
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120 |
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121 | _closeOnError () {
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122 | this._handshakeTimeout.stop();
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123 | this._disconnectionReason = 'error';
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124 |
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125 | return this.socket.close();
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126 | }
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127 |
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128 | _onopen (e) {
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129 | this.handlers.socketConnected();
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130 | this._disconnectionReason = 'handshake-failed';
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131 |
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132 |
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133 | const hello = { command: 'hello', protocols: [PROTOCOL_6, PROTOCOL_7] };
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134 |
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135 | hello.ver = VERSION;
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136 |
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137 | if (this.options.ext) {
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138 | hello.ext = this.options.ext;
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139 | }
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140 |
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141 | if (this.options.extver) {
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142 | hello.extver = this.options.extver;
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143 | }
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144 |
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145 | if (this.options.snipver) {
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146 | hello.snipver = this.options.snipver;
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147 | }
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148 |
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149 | this._sendCommand(hello);
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150 |
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151 | return this._handshakeTimeout.start(this.options.handshake_timeout);
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152 | }
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153 |
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154 | _onclose (e) {
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155 | this.protocol = 0;
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156 | this.handlers.disconnected(this._disconnectionReason, this._nextDelay);
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157 |
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158 | return this._scheduleReconnection();
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159 | }
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160 |
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161 | _onerror (e) {}
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162 |
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163 | _onmessage (e) {
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164 | return this.protocolParser.process(e.data);
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165 | }
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166 | };
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167 |
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168 | exports.Connector = Connector;
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