Mercurial > eldonilo > lightstring

annotate transports/bosh.js @ 108:5cb4733c5189

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many api changes
author Sonny Piers <sonny@fastmail.net>
date Fri, 13 Jul 2012 15:26:18 +0200
parents c06ec02217ee
children
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1 'use strict';
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2
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3 (function() {
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4
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5 if (typeof define !== 'undefined') {
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6 define(function() {
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7 return BOSHTransport;
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8 });
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9 }
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10 else {
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11 Lightstring.BOSHTransport = BOSHTransport;
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12 }
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13
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14 var BOSHTransport = function(aService, aJID) {
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15 this.service = aService;
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16 this.rid = 1337;
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17 this.jid = aJID;
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18 this.currentRequests = 0;
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19 this.maxHTTPRetries = 5;
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20 this.maxRequests = 2;
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21 this.queue = [];
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22 };
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23 BOSHTransport.prototype = new EventEmitter();
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24 BOSHTransport.prototype.open = function() {
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25 var that = this;
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26
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27 var attrs = {
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28 wait: '60',
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29 hold: '1',
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30 to: this.jid.domain,
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31 content: 'text/xml; charset=utf-8',
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32 ver: '1.6',
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33 'xmpp:version': '1.0',
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34 'xmlns:xmpp': 'urn:xmpp:xbosh',
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35 };
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36
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37 this.request(attrs, [], function(data) {
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38 that.emit('open');
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39 that.sid = data.getAttribute('sid');
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40 that.maxRequests = data.getAttribute('maxRequests') || that.maxRequests;
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41 if (!data.getElementsByTagNameNS('http://etherx.jabber.org/streams', 'features')[0]) {
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42 that.request();
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43 }
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44 });
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45
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46
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47 this.on('in', function(stanza) {
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48 if (stanza.name === 'success') {
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49 that.request({
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50 'to': that.jid.domain,
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51 'xmpp:restart': 'true',
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52 'xmlns:xmpp': 'urn:xmpp:xbosh'
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53 })
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54 }
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55 })
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56 };
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57 BOSHTransport.prototype.request = function(attrs, children, aOnSuccess, aOnError, aRetry) {
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58 if (!children)
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59 children = [];
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60
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61 var body = Lightstring.doc.createElement('body');
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62 body.setAttribute('rid', this.rid++);
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63 body.setAttribute('xmlns', 'http://jabber.org/protocol/httpbind');
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64
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65 //sid
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66 if (this.sid)
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67 body.setAttribute('sid', this.sid);
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68
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69 //attributes on body
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70 for (var i in attrs)
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71 body.setAttribute(i, attrs[i]);
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72
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73 //children
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74 for (var i = 0, length = children.length; i < length; i++) {
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75 body.appendChild(children[i]);
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76 };
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77
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78 var retry = aRetry || 0;
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79
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80 var req = new XMLHttpRequest();
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81 req.open('POST', this.service);
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82
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83
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84 // req.upload.addEventListener("progress", updateProgress, false);
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85 // req.upload.addEventListener("load", transferComplete, false);
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86 // req.upload.addEventListener("error", transferFailed, false);
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87 // req.upload.addEventListener("abort", transferCanceled, false);
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88
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89 // req.addEventListener("progress", updateProgress, false);
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90 // req.addEventListener("load", transferComplete, false);
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91 // req.addEventListener("error", transferFailed, false);
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92 // req.addEventListener("abort", transferCanceled, false);
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93
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94 var that = this;
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95 req.addEventListener("load", function() {
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96 if (req.status < 200 || req.status >= 400) {
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97 that.emit('error', "HTTP status " + req.status);
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98 that.emit('close');
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99 return;
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100 }
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101 that.currentRequests--;
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102
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103 var body = this.response;
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104 that.emit('rawin', body);
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105 var bodyEl = Lightstring.parse(body);
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106 that.processResponse(bodyEl);
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107 if (aOnSuccess)
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108 aOnSuccess(bodyEl);
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109
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110 }, false);
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111 // req.on('error', function(error) {
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112 // if (retry < that.maxHTTPRetries) {
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113 // that.request(attrs, children, aOnSuccess, aOnError, ++retry);
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114 // }
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115 // else {
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116 // that.emit('close');
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117 // that.emit('error', error);
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118 // if (aOnError)
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119 // aOnError(error);
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120 // }
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121 // });
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122 // this.emit('rawout', body.toString());
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123 if (body.childNodes) {
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124 for(var i = 0; i < body.childNodes.length; i++) {
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125 var child = body.childNodes[i];
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126 that.emit('out', new Lightstring.Stanza(child));
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127 }
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128 }
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129
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130 var bodyStr = Lightstring.serialize(body);
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131
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132 this.emit('rawout', bodyStr);
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133
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134 req.send(bodyStr);
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135 this.currentRequests++;
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136 };
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137 BOSHTransport.prototype.send = function(aData) {
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138 if (!aData) {
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139 var el = '';
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140 }
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141
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142 else if(typeof aData == 'string') {
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143 try {
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144 var el = Lightstring.parse(aData);
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145 }
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146 catch(e) {
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147 console.log(e);
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148 console.log(aData);
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149 }
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150 }
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151 else {
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152 var el = aData.root();
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153 }
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154
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155 var that = this;
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156
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157 this.queue.push(el);
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158
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159 setTimeout(this.mayRequest.bind(this), 0)
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160
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161 };
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162 BOSHTransport.prototype.end = function(stanzas) {
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163 var that = this;
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164
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165 stanzas = stanzas || [];
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166 if (typeof stanzas !== 'array')
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167 stanzas = [stanzas];
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168
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169 stanzas = this.queue.concat(stanzas);
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170 this.queue = [];
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171 this.request({type: 'terminate'}, stanzas,
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172 function(err, bodyEl) {
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173 that.emit('end');
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174 that.emit('close');
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175 delete that.sid;
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176 });
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177 };
108
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178 BOSHTransport.prototype.processResponse = function(bodyEl) {
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179 var children = bodyEl.childNodes
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180 if (children.length) {
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181 for(var i = 0; i < children.length; i++) {
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182 var child = children[i];
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183 var stanza = new Lightstring.Stanza(child);
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184 this.emit('in', stanza);
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185 }
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186 }
108
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187 else if (bodyEl.getAttribute('type') === 'terminate') {
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188 var condition = bodyEl.getAttribute('condition');
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189 this.emit('error',
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190 new Error(condition || "Session terminated"));
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191 this.emit('close');
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192 }
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193 };
108
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194 BOSHTransport.prototype.mayRequest = function() {
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195 var canRequest =
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196 this.sid && (this.currentRequests === 0 || ((this.queue.length > 0 && this.currentRequests < this.maxRequests))
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197 );
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198
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199 if (!canRequest)
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200 return;
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201
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202 var stanzas = this.queue;
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203 this.queue = [];
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204
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205 var that = this;
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206 this.request({}, stanzas,
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207 //success
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208 function(data) {
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209 //if (data)
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210 //that.processResponse(data);
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211 setTimeout(that.mayRequest.bind(that), 0);
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212
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213 },
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214 //error
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215 function(error) {
108
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216 console.log('error')
100
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217 that.emit('error', error);
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218 that.emit('close');
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219 delete that.sid;
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220 }
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221 );
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222 };
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223 })();