Mercurial > eldonilo > lightstring

annotate transports/bosh.js @ 105:fb50311997b5

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Add EventEmitter.js lib
author Sonny Piers <sonny.piers@gmail.com>
date Wed, 13 Jun 2012 12:48:06 +0200
parents 3e124209821a
children c06ec02217ee
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1 'use strict';
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2
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3 (function() {
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4 Lightstring.BOSHConnection = function(aService) {
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5 this.service = aService;
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6 this.rid = 1337;
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7 this.currentRequests = 0;
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8 this.maxHTTPRetries = 5;
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9 this.maxRequests = 2;
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10 this.queue = [];
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11 };
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12 Lightstring.BOSHConnection.prototype = new EventEmitter();
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13 Lightstring.BOSHConnection.prototype.open = function() {
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14 var that = this;
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15
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16 var attrs = {
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17 wait: '60',
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18 hold: '1',
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19 to: 'yuilop',
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20 content: 'text/xml; charset=utf-8',
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21 ver: '1.6',
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22 'xmpp:version': '1.0',
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23 'xmlns:xmpp': 'urn:xmpp:xbosh',
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24 };
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25
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26 this.request(attrs, null, function(data) {
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27 that.emit('open');
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28 that.sid = data.getAttribute('sid');
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29 that.maxRequests = data.getAttribute('maxRequests') || that.maxRequests;
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30 });
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31
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32
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33 this.on('in', function(stanza) {
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34 if (stanza.localName === 'success') {
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35 that.request({
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36 'xmpp:restart': 'true',
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37 'xmlns:xmpp': 'urn:xmpp:xbosh'
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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 Lightstring.BOSHConnection.prototype.request = function(attrs, children, aOnSuccess, aOnError, aRetry) {
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43 // if (children && children[0] && children[0].name === 'body') {
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44 // var body = children[0];
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45 // }
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46 // else {
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47 // var body = new ltx.Element('body');
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48 // if (children) {
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49 // if(util.isArray(children))
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50 // for (var k in children)
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51 // body.cnode(children[k]);
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52 // else
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53 // body.cnode(children);
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54 // }
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55 // }
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56
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57 var body = '<body rid="' + this.rid++ + '" xmlns="http://jabber.org/protocol/httpbind"/>';
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58 var body = Lightstring.XML2DOM(body);
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59
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60 //sid
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61 if (this.sid)
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62 body.setAttribute('sid', this.sid);
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63
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64 //attributes on body
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65 for (var i in attrs)
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66 body.setAttribute(i, attrs[i]);
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67
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68 //children
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69 for (var i in children)
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70 body.appendChild(children[i]);
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71
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72
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73
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74 var retry = aRetry || 0;
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75
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76 var req = new XMLHttpRequest();
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77 req.open('POST', this.service);
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78
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79
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80 // req.upload.addEventListener("progress", updateProgress, false);
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81 // req.upload.addEventListener("load", transferComplete, false);
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82 // req.upload.addEventListener("error", transferFailed, false);
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83 // req.upload.addEventListener("abort", transferCanceled, false);
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84
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85 // req.addEventListener("progress", updateProgress, false);
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86 // req.addEventListener("load", transferComplete, false);
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87 // req.addEventListener("error", transferFailed, false);
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88 // req.addEventListener("abort", transferCanceled, false);
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89
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90 var that = this;
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91 // req.responseType = 'document';
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92 req.addEventListener("load", function() {
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93 if (req.status < 200 || req.status >= 400) {
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94 that.emit('error', "HTTP status " + req.status);
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95 that.emit('close');
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96 return;
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97 }
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98 that.currentRequests--;
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99
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100 var body = this.response;
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101 that.emit('rawin', body);
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102 var bodyEl = Lightstring.XML2DOM(body);
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103 that.processResponse(bodyEl)
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104 if (aOnSuccess)
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105 aOnSuccess(bodyEl);
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106
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107 }, false);
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108 // req.on('error', function(error) {
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109 // if (retry < that.maxHTTPRetries) {
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110 // that.request(attrs, children, aOnSuccess, aOnError, ++retry);
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111 // }
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112 // else {
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113 // that.emit('close');
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114 // that.emit('error', error);
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115 // if (aOnError)
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116 // aOnError(error);
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117 // }
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118 // });
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119 // this.emit('rawout', body.toString());
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120
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121 for(var i = 0; i < body.children.length; i++) {
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122 var child = body.children[i];
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123 that.emit('out', child);
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124 }
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125 this.emit('rawout', Lightstring.DOM2XML(body))
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126
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127 req.send(Lightstring.DOM2XML(body));
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128 this.currentRequests++;
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129 };
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130 Lightstring.BOSHConnection.prototype.send = function(aData) {
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131 if (!aData) {
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132 var el = '';
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133 }
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134
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135 else if(typeof aData == 'string') {
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136 try {
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137 var el = Lightstring.XML2DOM(aData);
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138 }
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139 catch(e) {
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140 console.log(e);
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141 console.log(aData);
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142 }
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143 }
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144 else {
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145 var el = aData.root();
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146 }
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147
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148 var that = this;
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149
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150 this.queue.push(el);
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151
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152 setTimeout(this.mayRequest.bind(this), 0)
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153
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154 };
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155 Lightstring.BOSHConnection.prototype.end = function(stanzas) {
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156 var that = this;
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157
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158 stanzas = stanzas || [];
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159 if (typeof stanzas !== 'array')
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160 stanzas = [stanzas];
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161
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162 stanzas = this.queue.concat(stanzas);
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163 this.queue = [];
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164 this.request({type: 'terminate'}, stanzas,
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165 function(err, bodyEl) {
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166 that.emit('end');
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167 that.emit('close');
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168 delete that.sid;
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169 });
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170 };
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171 Lightstring.BOSHConnection.prototype.processResponse = function(bodyEl) {
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172 if (bodyEl && bodyEl.children) {
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173 for(var i = 0; i < bodyEl.children.length; i++) {
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174 var child = bodyEl.children[i];
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175 this.emit('in', child);
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176 }
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177 }
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178 if (bodyEl && bodyEl.getAttribute('type') === 'terminate') {
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179 var condition = bodyEl.getAttribute('condition');
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180 this.emit('error',
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181 new Error(condition || "Session terminated"));
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182 this.emit('close');
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183 }
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184 };
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185 Lightstring.BOSHConnection.prototype.mayRequest = function() {
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186 var canRequest =
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187 this.sid && (this.currentRequests === 0 || ((this.queue.length > 0 && this.currentRequests < this.maxRequests))
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188 );
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189
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190 if (!canRequest)
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191 return;
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192
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193 var stanzas = this.queue;
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194 this.queue = [];
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195 //~ this.rid++;
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196
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197 var that = this;
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198 this.request({}, stanzas,
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199 //success
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200 function(data) {
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201 //if (data)
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Sonny Piers <sonny.piers@gmail.com>
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202 //that.processResponse(data);
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203
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204 setTimeout(that.mayRequest.bind(that), 0);
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205
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206 },
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Sonny Piers <sonny.piers@gmail.com>
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207 //error
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Sonny Piers <sonny.piers@gmail.com>
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208 function(error) {
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209 that.emit('error', error);
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Sonny Piers <sonny.piers@gmail.com>
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210 that.emit('close');
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Sonny Piers <sonny.piers@gmail.com>
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211 delete that.sid;
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212 }
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213 );
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214 };
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215 })();