Mercurial > eldonilo > lightstring

annotate lightstring.js @ 71:f12c759e4097

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Fix service-unavailable handler and errors stanzas.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 02 Feb 2012 01:59:42 +0100
parents e1ccfb580228
children 5dbf93cef55d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 var Lightstring = {
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21 /**
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22 * @namespace Holds XMPP namespaces.
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23 * @description http://xmpp.org/xmpp-protocols/protocol-namespaces
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24 */
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25 ns: {
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26 streams: 'http://etherx.jabber.org/streams',
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27 jabber_client: 'jabber:client'
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28 },
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29 /**
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30 * @namespace Holds XMPP stanza builders.
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31 */
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32 stanzas: {
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33 stream: {
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34 open: function(aService) {
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35 //WORKAROUND: no ending "/" - node-xmpp-bosh bug
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36 return "<stream:stream to='" + aService + "'" +
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37 " xmlns='" + Lightstring.ns['jabber_client'] + "'" +
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38 " xmlns:stream='" + Lightstring.ns['streams'] + "'" +
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39 " version='1.0'/>";
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40 },
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41 close: function() {
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42 return "</stream:stream>";
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43 }
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44 },
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45 errors: {
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46 iq: function(from, id, type, error) {
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47 return "<iq to='" + from + "'" +
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48 " id='" + id + "'" +
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49 " type='error'>" +
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50 "<error type='" + type + "'>" +
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51 "<" + error + " xmlns='" + Lightstring.ns['xmpp_stanzas'] + "'/>" + //TODO: allow text content.
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52 //TODO: allow text and payload.
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53 "</error>" +
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54 "</iq>";
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55 }
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56 }
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57 },
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58 /**
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59 * @namespace Holds Lightstring plugins
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60 */
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61 plugins: {},
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62 /**
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63 * @private
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64 */
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65 parser: new DOMParser(),
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66 /**
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67 * @private
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68 */
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69 serializer: new XMLSerializer(),
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70 /**
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71 * @function Transforms a XML string to a DOM object.
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72 * @param {String} aString XML string.
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73 * @return {Object} Domified XML.
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74 */
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75 XML2DOM: function(aString) {
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76 var DOM = null;
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77 try {
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78 DOM = this.parser.parseFromString(aString, 'text/xml').documentElement;
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79 }
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80 catch (e) {
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81 //TODO: error
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82 }
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83 finally {
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84 return DOM;
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85 };
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86 },
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87 /**
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88 * @function Transforms a DOM object to a XML string.
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89 * @param {Object} aString DOM object.
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90 * @return {String} Stringified DOM.
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91 */
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92 DOM2XML: function(aElement) {
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93 var XML = null;
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94 try {
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95 XML = this.serializer.serializeToString(aElement);
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96 }
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97 catch (e) {
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98 //TODO: error
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99 }
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100 finally {
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101 return XML;
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102 };
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103 },
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104 /**
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105 * @function Get an unique identifier.
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106 * @param {String} [aString] Prefix to put before the identifier.
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107 * @return {String} Identifier.
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108 */
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109 newId: (function() {
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110 var id = 1024;
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111 return function(prefix) {
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112 if (typeof prefix === 'string')
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113 return prefix + id++;
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114 return '' + id++;
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115 };
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116 })()
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117 };
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118
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119 /**
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120 * @constructor Creates a new Lightstring connection
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121 * @param {String} [aService] The Websocket service URL.
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122 * @memberOf Lightstring
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123 */
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124 Lightstring.Connection = function(aService) {
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125 if (aService)
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126 this.service = aService;
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127 /**
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128 * @namespace Holds connection events handlers
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129 */
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130 this.handlers = {};
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131 /**
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132 * @namespace Holds connection iq callbacks
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133 */
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134 this.callbacks = {};
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135 };
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136 Lightstring.Connection.prototype = {
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137 /**
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138 * @function Create and open a websocket then go though the XMPP authentification process.
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139 * @param {String} [aJid] The JID (Jabber id) to use.
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140 * @param {String} [aPassword] The associated password.
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141 */
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142 connect: function(aJid, aPassword) {
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143 this.emit('connecting');
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144 this.jid = new Lightstring.JID(aJid);
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145 if (aPassword)
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146 this.password = aPassword;
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147
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148 if (!this.jid.bare)
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149 return; //TODO: error
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150 if (!this.service)
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151 return; //TODO: error
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152
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153 if(typeof(WebSocket) === "function") {
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154 this.socket = new WebSocket(this.service, 'xmpp');
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155 }
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156 else if(typeof(MozWebSocket) === "function") {
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157 this.socket = new MozWebSocket(this.service, 'xmpp');
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158 }
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159 else {
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160 return; //TODO: error
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161 }
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162
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163 var Conn = this;
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164 this.socket.addEventListener('open', function() {
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165 if (this.protocol !== 'xmpp')
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166 return; //TODO: error
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167
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168 var stream = Lightstring.stanzas.stream.open(Conn.jid.domain);
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169 //FIXME: Use Lightstring.Connection.send (problem with parsing steam);
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170 Conn.socket.send(stream);
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171 var stanza = {
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172 XML: stream
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173 };
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174 Conn.emit('output', stanza);
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175 });
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176 this.socket.addEventListener('error', function(e) {
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177 Conn.emit('disconnecting', e.data);
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178 //TODO: error
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179 });
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180 this.socket.addEventListener('close', function(e) {
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181 Conn.emit('disconnected', e.data);
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182 });
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183 this.socket.addEventListener('message', function(e) {
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184 var stanza = new Lightstring.Stanza(e.data);
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185
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186 //FIXME: node-xmpp-bosh sends a self-closing stream:stream tag; it is wrong!
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187 Conn.emit('input', stanza);
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188
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189 if(!stanza.DOM)
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190 return;
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191
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192 var name = stanza.DOM.localName;
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193
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194 //Authentication
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195 //FIXME SASL mechanisms and XMPP features can be both in a stream:features
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196 if (name === 'features') {
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197 //SASL mechanisms
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198 if (stanza.DOM.firstChild.localName === 'mechanisms') {
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199 stanza.mechanisms = [];
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200 var nodes = stanza.DOM.querySelectorAll('mechanism');
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201 for (var i = 0; i < nodes.length; i++)
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202 stanza.mechanisms.push(nodes[i].textContent);
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203 Conn.emit('mechanisms', stanza);
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204 }
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205 //XMPP features
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206 else {
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207 //TODO: stanza.features
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208 Conn.emit('features', stanza);
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209 }
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210 }
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211 else if (name === 'challenge') {
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212 Conn.emit('challenge', stanza);
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213 }
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214 else if (name === 'failure') {
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215 Conn.emit('failure', stanza);
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216 }
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217 else if (name === 'success') {
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218 Conn.emit('success', stanza);
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219 }
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220
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221 //Iq callbacks
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222 else if (name === 'iq') {
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223 var payload = stanza.DOM.firstChild;
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224 if (payload)
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225 Conn.emit('iq/' + payload.namespaceURI + ':' + payload.localName, stanza);
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226
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227 var id = stanza.DOM.getAttributeNS(null, 'id');
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228 if (!(id && id in Conn.callbacks))
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229 return;
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230
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231 var type = stanza.DOM.getAttributeNS(null, 'type');
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232 if (type !== 'result' && type !== 'error')
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233 return; //TODO: warning
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234
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235 var callback = Conn.callbacks[id];
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236 if (type === 'result' && callback.success)
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237 callback.success(stanza);
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238 else if (type === 'error' && callback.error)
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239 callback.error(stanza);
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240
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241 delete Conn.callbacks[id];
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242 }
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243 });
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244 },
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245 /**
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246 * @function Send a message.
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247 * @param {String|Object} aStanza The message to send.
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248 * @param {Function} [aCallback] Executed on answer. (stanza must be iq)
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249 */
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250 send: function(aStanza, aSuccess, aError) {
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251 if (!(aStanza instanceof Lightstring.Stanza))
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252 var stanza = new Lightstring.Stanza(aStanza);
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253 else
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254 var stanza = aStanza;
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255
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256 if(!stanza)
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257 return;
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258
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259 if (stanza.DOM.tagName === 'iq') {
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260 var type = stanza.DOM.getAttributeNS(null, 'type');
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261 if (type !== 'get' || type !== 'set')
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262 ; //TODO: error
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263
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264 var callback = {success: aSuccess, error: aError};
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265
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266 var id = stanza.DOM.getAttributeNS(null, 'id');
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267 if (!id)
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268 ; //TODO: warning
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269 else
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270 this.callbacks[id] = callback;
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271
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272 } else if (aSuccess || aError)
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273 ; //TODO: warning (no callback without iq)
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274
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275
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276 //FIXME this.socket.send(stanza.XML); (need some work on Lightstring.Stanza)
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277 var fixme = Lightstring.DOM2XML(stanza.DOM);
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278 stanza.XML = fixme;
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279 this.socket.send(fixme);
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280 this.emit('output', stanza);
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281 },
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282 /**
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283 * @function Closes the XMPP stream and the socket.
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284 */
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285 disconnect: function() {
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286 this.emit('disconnecting');
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287 var stream = Lightstring.stanzas.stream.close();
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288 this.send(stream);
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289 this.emit('XMLOutput', stream);
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290 this.socket.close();
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291 },
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292 load: function() {
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293 for (var i = 0; i < arguments.length; i++) {
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294 var name = arguments[i];
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295 if (!(name in Lightstring.plugins))
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296 continue; //TODO: error
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297
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298 var plugin = Lightstring.plugins[name];
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299
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300 //Namespaces
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301 for (var ns in plugin.namespaces)
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302 Lightstring.ns[ns] = plugin.namespaces[ns];
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303
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304 //Stanzas
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305 Lightstring.stanzas[name] = {};
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306 for (var stanza in plugin.stanzas)
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307 Lightstring.stanzas[name][stanza] = plugin.stanzas[stanza];
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308
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309 //Handlers
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310 for (var handler in plugin.handlers)
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311 this.on(handler, plugin.handlers[handler]);
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312
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313 //Methods
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314 this[name] = {};
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315 for (var method in plugin.methods)
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316 this[name][method].bind(this);
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317
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318 if (plugin.init)
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319 plugin.init();
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320 }
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321 },
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322 /**
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323 * @function Emits an event.
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324 * @param {String} aName The event name.
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325 * @param {Function|Array|Object} [aData] Data about the event.
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326 */
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327 emit: function(aName, aData) {
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328 var handlers = this.handlers[aName];
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329 if (!handlers)
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330 return;
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331
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332 if (aData && aData.DOM && aData.DOM.localName !== 'iq') {
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333 for (var i = 0; i < handlers.length; i++)
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334 handlers[i].call(this, aData);
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335
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336 return;
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337 }
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338
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339 var ret;
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340 for (var i = 0; i < handlers.length; i++) {
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341 ret = handlers[i].call(this, aData);
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342 if (typeof ret !== 'boolean')
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343 return; //TODO: error
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344
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345 if (ret)
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346 return;
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347 }
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348
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349 if (aData && aData.DOM) {
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350 var from = aData.DOM.getAttributeNS(null, 'from');
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351 var id = aData.DOM.getAttributeNS(null, 'id');
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352 this.send(Lightstring.stanzas.errors.iq(from, id, 'cancel', 'service-unavailable'));
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353 }
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354 },
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355 /**
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356 * @function Register an event handler.
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357 * @param {String} aName The event name.
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358 * @param {Function} aCallback The callback to call when the event is emitted.
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359 */
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360 on: function(aName, callback) {
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361 if (!this.handlers[aName])
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362 this.handlers[aName] = [];
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363 this.handlers[aName].push(callback);
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364 }
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365 };