Mercurial > eldonilo > lightstring

annotate lightstring.js @ 56:1d4b844586f6

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Bind methods so Lightstring.Connection.plugin.method works with the correct context.
author Sonny Piers <sonny.piers@gmail.com>
date Wed, 01 Feb 2012 15:46:57 +0100
parents aaad98b33f86
children 91f18fdc0e2c
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1
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1 'use strict';
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2
2
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3 /**
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4 Copyright (c) 2011, Sonny Piers <sonny at fastmail dot net>
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5
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6 Permission to use, copy, modify, and/or distribute this software for any
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7 purpose with or without fee is hereby granted, provided that the above
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8 copyright notice and this permission notice appear in all copies.
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9
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10 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19
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20 /**
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21 * @namespace No code from lightstring should be callable outside this namespace/scope.
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22 */
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23 var Lightstring = {
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24 /**
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25 * @namespace Holds XMPP namespaces.
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26 * @description http://xmpp.org/xmpp-protocols/protocol-namespaces
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27 */
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28 ns: {
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29 streams: 'http://etherx.jabber.org/streams',
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30 jabber_client: 'jabber:client'
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31 },
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32 /**
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33 * @namespace Holds XMPP stanza builders.
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34 */
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35 stanzas: {
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36 stream: {
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37 open: function(aService) {
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38 //FIXME no ending "/" - node-xmpp-bosh bug
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39 return "<stream:stream to='" + aService + "'" +
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40 " xmlns='" + Lightstring.ns['jabber_client'] + "'" +
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41 " xmlns:stream='" + Lightstring.ns['streams'] + "'" +
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42 " version='1.0'/>";
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43 },
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44 close: function() {
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45 return "</stream:stream>";
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46 }
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47 }
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48 },
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49 plugins: {},
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50 /**
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51 * @private
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52 */
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53 parser: new DOMParser(),
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54 /**
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55 * @private
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56 */
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57 serializer: new XMLSerializer(),
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58 /**
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59 * @function Transforms a XML string to a DOM object.
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60 * @param {String} aString XML string.
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61 * @return {Object} Domified XML.
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62 */
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63 XML2DOM: function(aString) {
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64 var DOM = null;
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65 try {
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66 DOM = this.parser.parseFromString(aString, 'text/xml').documentElement;
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67 }
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68 catch (e) {
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69 alert(e);
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70 }
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71 finally {
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72 return DOM;
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73 };
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74 },
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75 /**
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76 * @function Transforms a DOM object to a XML string.
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77 * @param {Object} aString DOM object.
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78 * @return {String} Stringified DOM.
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79 */
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80 DOM2XML: function(aElement) {
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81 var XML = null;
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82 try {
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83 XML = this.serializer.serializeToString(aElement);
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84 }
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85 catch (e) {
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86 alert(e);
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87 }
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88 finally {
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89 return XML;
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90 };
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91 },
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92 /**
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93 * @function Get an unique identifier.
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94 * @param {String} [aString] Prefix to put before the identifier.
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95 * @return {String} Identifier.
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96 */
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97 newId: (function() {
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98 var id = 1024;
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99 return function(prefix) {
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100 if (typeof prefix === 'string')
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101 return prefix + id++;
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102 return '' + id++;
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103 };
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104 })()
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105 };
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106
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107 /**
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108 * @constructor Creates a new Lightstring connection
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109 * @param {String} [aService] The Websocket service URL.
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110 * @memberOf Lightstring
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111 */
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112 Lightstring.Connection = function(aService) {
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113 if (aService)
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114 this.service = aService;
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115 this.handlers = {};
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116 this.on('stream:features', function(stanza) {
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117 var nodes = stanza.DOM.querySelectorAll('mechanism');
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118 //SASL/Auth features
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119 if (nodes.length > 0) {
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120 this.emit('mechanisms', stanza);
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121 var mechanisms = {};
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122 for (var i = 0; i < nodes.length; i++)
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123 mechanisms[nodes[i].textContent] = true;
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124
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125
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126 //FIXME support SCRAM-SHA1 && allow specify method preferences
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127 if ('DIGEST-MD5' in mechanisms)
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128 this.send(
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129 "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl'" +
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130 " mechanism='DIGEST-MD5'/>"
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131 );
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132 else if ('PLAIN' in mechanisms) {
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133 var token = btoa(
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134 this.jid +
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135 '\u0000' +
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136 this.jid.node +
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137 '\u0000' +
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138 this.password
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139 );
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140 this.send(
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141 "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl'" +
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142 " mechanism='PLAIN'>" + token + "</auth>"
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143 );
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144 }
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145 }
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146 //XMPP features
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147 else {
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148 this.emit('features', stanza);
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149 //Bind http://xmpp.org/rfcs/rfc3920.html#bind
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150 var bind =
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151 "<iq type='set' xmlns='jabber:client'>" +
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152 "<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>" +
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153 (this.jid.resource? "<resource>" + this.jid.resource + "</resource>": "") +
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154 "</bind>" +
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155 "</iq>";
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156
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157 this.send(
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158 bind,
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159 function(stanza) {
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160 //Session http://xmpp.org/rfcs/rfc3921.html#session
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161 this.jid = new Lightstring.JID(stanza.DOM.textContent);
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162 this.send(
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163 "<iq type='set' xmlns='jabber:client'>" +
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164 "<session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>" +
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165 "</iq>",
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166 function() {
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167 this.emit('connected');
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168 }
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169 );
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170 }
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171 );
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172 }
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173 });
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174 this.on('success', function(stanza) {
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175 this.send(
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176 "<stream:stream to='" + this.jid.domain + "'" +
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177 " xmlns='jabber:client'" +
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178 " xmlns:stream='http://etherx.jabber.org/streams'" +
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179 " version='1.0'/>"
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180 );
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181 });
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182 this.on('failure', function(stanza) {
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183 this.emit('conn-error', stanza.DOM.firstChild.tagName);
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184 });
41
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185 this.on('challenge', function(stanza) {
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186 //FIXME this is mostly Strophe code
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187
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188 function _quote(str) {
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189 return '"' + str.replace(/\\/g, '\\\\').replace(/"/g, '\\"') + '"';
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190 };
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191
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192 var challenge = atob(stanza.DOM.textContent);
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193
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194 var attribMatch = /([a-z]+)=("[^"]+"|[^,"]+)(?:,|$)/;
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195
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196 var cnonce = MD5.hexdigest(Math.random() * 1234567890);
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197 var realm = '';
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198 var host = null;
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199 var nonce = '';
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200 var qop = '';
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201 var matches;
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202
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203 while (challenge.match(attribMatch)) {
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204 matches = challenge.match(attribMatch);
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205 challenge = challenge.replace(matches[0], '');
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206 matches[2] = matches[2].replace(/^"(.+)"$/, '$1');
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207 switch (matches[1]) {
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208 case 'realm':
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209 realm = matches[2];
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210 break;
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211 case 'nonce':
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212 nonce = matches[2];
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213 break;
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214 case 'qop':
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215 qop = matches[2];
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216 break;
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217 case 'host':
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218 host = matches[2];
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219 break;
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220 }
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221 }
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222
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223 var digest_uri = 'xmpp/' + this.jid.domain;
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224 if (host !== null)
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225 digest_uri = digest_uri + '/' + host;
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226 var A1 = MD5.hash(this.jid.node +
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227 ':' + realm + ':' + this.password) +
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228 ':' + nonce + ':' + cnonce;
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229 var A2 = 'AUTHENTICATE:' + digest_uri;
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230
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231 var responseText = '';
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232 responseText += 'username=' + _quote(this.jid.node) + ',';
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233 responseText += 'realm=' + _quote(realm) + ',';
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234 responseText += 'nonce=' + _quote(nonce) + ',';
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235 responseText += 'cnonce=' + _quote(cnonce) + ',';
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236 responseText += 'nc="00000001",';
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237 responseText += 'qop="auth",';
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238 responseText += 'digest-uri=' + _quote(digest_uri) + ',';
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239 responseText += 'response=' + _quote(
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240 MD5.hexdigest(MD5.hexdigest(A1) + ':' +
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diff changeset
241 nonce + ':00000001:' +
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242 cnonce + ':auth:' +
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243 MD5.hexdigest(A2))) + ',';
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244 responseText += 'charset="utf-8"';
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245 this.send(
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246 "<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>" +
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247 btoa(responseText) +
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248 "</response>");
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249 });
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250 };
17
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251 Lightstring.Connection.prototype = {
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diff changeset
252 /**
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253 * @function Create and open a websocket then go though the XMPP authentification process.
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254 * @param {String} [aJid] The JID (Jabber id) to use.
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255 * @param {String} [aPassword] The associated password.
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256 */
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257 connect: function(aJid, aPassword) {
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258 this.emit('connecting');
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259 this.jid = new Lightstring.JID(aJid);
17
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260 if (aPassword)
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261 this.password = aPassword;
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262
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263 if (!this.jid.bare)
17
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diff changeset
264 throw 'Lightstring: Connection.jid is undefined.';
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parents: 16
diff changeset
265 if (!this.password)
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diff changeset
266 throw 'Lightstring: Connection.password is undefined.';
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parents: 16
diff changeset
267 if (!this.service)
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parents: 16
diff changeset
268 throw 'Lightstring: Connection.service is undefined.';
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parents: 16
diff changeset
269
40
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270 if(typeof(WebSocket) === "function") {
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271 this.socket = new WebSocket(this.service, 'xmpp');
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parents: 39
diff changeset
272 }
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parents: 39
diff changeset
273 else if(typeof(MozWebSocket) === "function") {
39
5e32481b8a92 Better WebSocket feature discovering and Opera support
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diff changeset
274 this.socket = new MozWebSocket(this.service, 'xmpp');
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parents: 37
diff changeset
275 }
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parents: 37
diff changeset
276 else {
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parents: 37
diff changeset
277 throw new Error('WebSocket not available.');
17
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parents: 16
diff changeset
278 }
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parents: 16
diff changeset
279
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280 var that = this;
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diff changeset
281 this.socket.addEventListener('open', function() {
29
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282 //TODO: if (this.protocol !== 'xmpp')
17
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283
44
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284 var stream = Lightstring.stanzas.stream.open(that.jid.domain);
29
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285 //TODO: Use Lightstring.Connection.send (problem with parsing steam);
17
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286 that.socket.send(stream);
29
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diff changeset
287 var stanza = {
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288 XML: stream
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289 };
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290 that.emit('output', stanza);
17
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parents: 16
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291 });
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diff changeset
292 this.socket.addEventListener('error', function(e) {
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293 that.emit('error', e.data);
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294 console.log(e.data);
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295 });
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296 this.socket.addEventListener('close', function(e) {
18
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297 that.emit('disconnected', e.data);
17
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298 });
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299 this.socket.addEventListener('message', function(e) {
29
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300 var stanza = new Lightstring.Stanza(e.data);
17
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301
29
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302 //TODO node-xmpp-bosh sends a self-closing stream:stream tag; it is wrong!
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303 that.emit('input', stanza);
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304
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305 if(!stanza.DOM)
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306 return;
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307
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308 that.emit(stanza.DOM.tagName, stanza);
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309
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diff changeset
310 if (stanza.DOM.tagName === 'iq') {
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311 var payload = stanza.DOM.firstChild;
23
99bf2bdcfd96 Emit an iq/namespace:tag event for each iq containing a payload.
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diff changeset
312 if (payload)
29
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diff changeset
313 that.emit('iq/' + payload.namespaceURI + ':' + payload.localName, stanza);
43
136df1708856 Better iq callbacks. (breaks everything)
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parents: 42
diff changeset
314
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diff changeset
315 var id = stanza.DOM.getAttributeNS(null, 'id');
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diff changeset
316 if (!(id && id in that.callbacks))
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317 return;
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diff changeset
318
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diff changeset
319 var type = stanza.DOM.getAttributeNS(null, 'type');
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diff changeset
320 if (type !== 'result' || type !== 'error')
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diff changeset
321 return; //TODO: emit an warning, perhaps.
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diff changeset
322
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diff changeset
323 var callback = that.callbacks[id];
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324 if (type === 'result' && callback.result)
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325 callback.result(stanza);
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326 else if (type === 'error' && callback.error)
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327 callback.error(stanza);
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328
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329 delete that.callbacks[id];
41
2895891f19bb s/that/this/ in handlers.
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diff changeset
330
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parents: 40
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331 //TODO: really needed?
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parents: 40
diff changeset
332 } else if (stanza.DOM.tagName === 'message') {
2895891f19bb s/that/this/ in handlers.
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parents: 40
diff changeset
333 var payloads = stanza.DOM.children;
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parents: 40
diff changeset
334 for (var i = 0; i < payloads.length; i++)
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parents: 40
diff changeset
335 that.emit('message/' + payloads[i].namespaceURI + ':' + payloads[i].localName, stanza);
23
99bf2bdcfd96 Emit an iq/namespace:tag event for each iq containing a payload.
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parents: 22
diff changeset
336 }
17
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parents: 16
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337 });
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parents: 16
diff changeset
338 },
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parents: 16
diff changeset
339 /**
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parents: 16
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340 * @function Send a message.
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341 * @param {String|Object} aStanza The message to send.
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diff changeset
342 * @param {Function} [aCallback] Executed on answer. (stanza must be iq)
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diff changeset
343 */
43
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diff changeset
344 send: function(aStanza, aResult, aError) {
29
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diff changeset
345 if (!(aStanza instanceof Lightstring.Stanza))
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diff changeset
346 var stanza = new Lightstring.Stanza(aStanza);
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diff changeset
347 else
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diff changeset
348 var stanza = aStanza;
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diff changeset
349
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diff changeset
350 if(!stanza)
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diff changeset
351 return;
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diff changeset
352
1e6d2ca2daae Adds a Lightstring.Stanza object and use it.
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parents: 28
diff changeset
353 if (stanza.DOM.tagName === 'iq') {
42
ee874d064650 Check iq sending.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 41
diff changeset
354 var type = stanza.DOM.getAttributeNS(null, 'type');
ee874d064650 Check iq sending.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 41
diff changeset
355 if (type !== 'get' || type !== 'set')
ee874d064650 Check iq sending.
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parents: 41
diff changeset
356 ; //TODO: emit an error.
ee874d064650 Check iq sending.
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parents: 41
diff changeset
357
43
136df1708856 Better iq callbacks. (breaks everything)
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parents: 42
diff changeset
358 var callback = {result: aResult, error: aError};
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parents: 42
diff changeset
359
42
ee874d064650 Check iq sending.
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parents: 41
diff changeset
360 var id = stanza.DOM.getAttributeNS(null, 'id');
43
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parents: 42
diff changeset
361 if (!id)
136df1708856 Better iq callbacks. (breaks everything)
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parents: 42
diff changeset
362 ; //TODO: emit an warning.
136df1708856 Better iq callbacks. (breaks everything)
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parents: 42
diff changeset
363 else
136df1708856 Better iq callbacks. (breaks everything)
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parents: 42
diff changeset
364 this.callback[id] = callback;
136df1708856 Better iq callbacks. (breaks everything)
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parents: 42
diff changeset
365
136df1708856 Better iq callbacks. (breaks everything)
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parents: 42
diff changeset
366 } else if (aResult || aError)
42
ee874d064650 Check iq sending.
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parents: 41
diff changeset
367 ; //TODO: callback can’t be called with non-iq stanza.
17
b7bd814333eb Move methods to the prototype.
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parents: 16
diff changeset
368
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parents: 16
diff changeset
369
29
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parents: 28
diff changeset
370 //TODO this.socket.send(stanza.XML); (need some work on Lightstring.Stanza)
37
6773e5bc2ca0 several fixes
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parents: 34
diff changeset
371 var fixme = Lightstring.DOM2XML(stanza.DOM);
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parents: 34
diff changeset
372 stanza.XML = fixme;
6773e5bc2ca0 several fixes
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parents: 34
diff changeset
373 this.socket.send(fixme);
29
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parents: 28
diff changeset
374 this.emit('output', stanza);
17
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parents: 16
diff changeset
375 },
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parents: 16
diff changeset
376 /**
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parents: 16
diff changeset
377 * @function Closes the XMPP stream and the socket.
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parents: 16
diff changeset
378 */
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parents: 16
diff changeset
379 disconnect: function() {
18
48bc65a0e0f1 add pubsub config
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parents: 17
diff changeset
380 this.emit('disconnecting');
44
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
381 var stream = Lightstring.stanzas.stream.close();
18
48bc65a0e0f1 add pubsub config
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parents: 17
diff changeset
382 this.send(stream);
17
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parents: 16
diff changeset
383 this.emit('XMLOutput', stream);
18
48bc65a0e0f1 add pubsub config
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parents: 17
diff changeset
384 this.socket.close();
48bc65a0e0f1 add pubsub config
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parents: 17
diff changeset
385 },
44
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
386 load: function() {
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
387 for (var i = 0; i < arguments.length; i++) {
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parents: 43
diff changeset
388 var name = arguments[i];
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parents: 43
diff changeset
389 if (!(name in Lightstring.plugins))
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
390 continue; //TODO: throw an error?
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parents: 43
diff changeset
391
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
392 var plugin = Lightstring.plugins[name];
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
393
56
1d4b844586f6 Bind methods so Lightstring.Connection.plugin.method works with the correct context.
Sonny Piers <sonny.piers@gmail.com>
parents: 55
diff changeset
394 //Namespaces
44
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
395 for (var ns in plugin.namespaces)
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
396 Lightstring.ns[ns] = plugin.namespaces[ns];
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
397
56
1d4b844586f6 Bind methods so Lightstring.Connection.plugin.method works with the correct context.
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parents: 55
diff changeset
398 //Stanzas
54
0b7dd59e264a Fix Connection.load and add the init method to plugins.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 51
diff changeset
399 Lightstring.stanzas[name] = {};
44
3dfb596cf669 Add a plugin loader.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 43
diff changeset
400 for (var stanza in plugin.stanzas)
51
63c1c8bc8c19 Add plugin namespaces to Lightstring.stanzas and Lightstring.Connection methodes.
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parents: 50
diff changeset
401 Lightstring.stanzas[name][stanza] = plugin.stanzas[stanza];
44
3dfb596cf669 Add a plugin loader.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 43
diff changeset
402
56
1d4b844586f6 Bind methods so Lightstring.Connection.plugin.method works with the correct context.
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parents: 55
diff changeset
403 //Handlers
44
3dfb596cf669 Add a plugin loader.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 43
diff changeset
404 for (var handler in plugin.handlers)
3dfb596cf669 Add a plugin loader.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 43
diff changeset
405 this.on(handler, plugin.handlers[handler]);
3dfb596cf669 Add a plugin loader.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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406
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407 //Methods
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408 this[name] = {}:
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409 for (var method in plugins.methods)
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410 this[name][method].bind(this);
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0b7dd59e264a Fix Connection.load and add the init method to plugins.
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411
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412 if (plugin.init)
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413 plugin.init();
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414 }
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415 },
17
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416 /**
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417 * @function Emits an event.
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418 * @param {String} aName The event name.
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419 * @param {Function|Array|Object} [aData] Data about the event.
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420 */
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421 emit: function(aName, aData) {
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422 var handlers = this.handlers[aName];
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423 if (!handlers)
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424 return;
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425
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426 for (var i = 0; i < handlers.length; i++)
41
2895891f19bb s/that/this/ in handlers.
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427 handlers[i].call(this, aData);
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428 },
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429 /**
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Sonny Piers <sonny.piers@gmail.com>
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430 * @function Register an event handler.
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431 * @param {String} aName The event name.
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432 * @param {Function} aCallback The callback to call when the event is emitted.
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433 */
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434 on: function(aName, callback) {
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435 if (!this.handlers[aName])
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436 this.handlers[aName] = [];
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437 this.handlers[aName].push(callback);
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438 }
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439 };