annotate avatar.js @ 4:8acaa0a575c7

Allow configuration of the host.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 19 May 2011 17:21:16 +0200
parents 805f24754ff1
children 9b2f17ea1594
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1 #!/usr/bin/env node
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2
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3 /*
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4 * Copyright (C) 2011 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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5 *
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6 * This file is the source code of an XMPP avatar retriever.
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7 *
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8 * This program is free software: you can redistribute it and/or modify
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9 * it under the terms of the GNU Affero General Public License as
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10 * published by the Free Software Foundation, version 3 of the License.
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11 *
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12 * This program is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 * GNU Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 */
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20
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21 'use strict';
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22
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23 var config = require('./configuration');
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24
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25 try {
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26 var xmpp = require('node-xmpp');
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27 var conn = new xmpp.Component(config);
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28
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29 conn.on('stanza', function (stanza) {
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30 if (stanza.is('iq'))
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31 onIq(stanza);
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32 else
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33 onError(stanza);
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34 });
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35
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36 conn._uniqueId = 42;
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37 conn.getUniqueId = function(suffix) {
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38 return ++this._uniqueId + (suffix?(":"+suffix):"");
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39 };
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40
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41 var Element = require('ltx').Element;
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42 } catch (e) {
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43 var xmpp = require('xmpp');
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44 var conn = new xmpp.Connection(config.host, config.port);
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45
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46 conn.log = function (_, m) { console.log(m); };
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47
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48 conn.connect(config.jid, config.password, function (status, condition) {
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49 if(status == xmpp.Status.CONNECTED) {
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50 conn.addHandler(onIq, null, 'iq', null, null, null);
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51 conn.addHandler(onError, null, 'message', null, null, null);
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52 conn.addHandler(onError, null, 'presence', null, null, null);
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53 } else
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54 conn.log(xmpp.LogLevel.DEBUG, "New connection status: " + status + (condition?(" ("+condition+")"):""));
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55 });
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56
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57 xmpp.StanzaBuilder.prototype.cnode = function (stanza)
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58 {
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59 var parent = this.last_node[this.last_node.length-1];
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60 parent.tags.push(stanza);
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61 parent.children.push(stanza);
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62 this.last_node.push(stanza);
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63 return this;
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64 };
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65
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66 var Element = xmpp.StanzaBuilder;
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67 }
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68
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69 var fs = require('fs');
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70 var http = require('http');
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71
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72 process.addListener('uncaughtException', function (err) {
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73 console.log('\x1b[41;1mUncaught exception (' + err + '), this should never happen:\x1b[0m\n' + err.stack);
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74 });
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75
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76 var extensions = {
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77 png: 'image/png',
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78 svg: 'image/svg+xml',
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79 jpg: 'image/jpeg',
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80 gif: 'image/gif'
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81 }
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82
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83 var jids = {};
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84
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85 var sent = {};
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86
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87 var svgError = function(res, message) {
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88 res.writeHead(500, {'Content-Type': 'image/svg+xml'});
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89 res.write('<?xml version="1.0" encoding="UTF-8"?>\n');
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90 res.write('<svg xmlns="http://www.w3.org/2000/svg" viewBox="-256 -20 512 32">\n');
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91 res.write('\t<rect x="-256" y="-20" width="512" height="32" fill="white"/>\n');
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92 res.write('\t<text text-anchor="middle">'+message+'</text>\n');
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93 res.end('</svg>\n');
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94 }
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95
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96 var makeError = function(response) {
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97 response.attr.type = 'error';
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98
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99 var error = new Element('error', {type: 'cancel'});
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100 error.c('feature-not-implemented', {xmlns: 'urn:ietf:params:xml:ns:xmpp-stanzas'}).up();
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101 response.cnode(error);
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102
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103 return response;
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104 }
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105
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106 function onIq(stanza) {
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107 var type = stanza.getAttribute('type');
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108 var from = stanza.getAttribute('to');
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109 var to = stanza.getAttribute('from');
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110 var id = stanza.getAttribute('id');
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111
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112 var response;
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113 if (id)
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114 response = new Element('iq', {to: to, from: from, type: 'result', id: id});
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115 else
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116 response = new Element('iq', {to: to, from: from, type: 'result'});
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117
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118 if (!sent[id]) {
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119 conn.send(makeError(response));
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120 return;
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121 }
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122
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123 var res = sent[id];
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124 delete sent[id];
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125
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126 if (type == 'error') {
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127 try {
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128 var err = stanza.getChild('error').getChild().name;
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129 } catch (e) {
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130 var err = 'none';
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131 }
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132 svgError(res, 'Error during query of this user’s vCard: “'+err+'”.');
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133 return;
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134 }
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135
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136 var vCard = stanza.getChild('vCard', 'vcard-temp');
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137 if (!vCard) {
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138 svgError(res, 'Error: this user doesn’t have a vCard.');
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139 return;
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140 }
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141
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142 try {
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143 var photo = vCard.getChild('PHOTO', 'vcard-temp');
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144 var base64 = photo.getChild('BINVAL', 'vcard-temp').getText();
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145
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146 try {
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147 var type = photo.getChild('TYPE', 'vcard-temp').getText();
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148 } catch (e) {
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149 svgError(res, 'Error: this user’s vCard doesn’t specify the MIME type of its avatar.');
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parents: 1
diff changeset
150 return;
1
0c19fadfc12d Serve the right error message when the TYPE of the PHOTO is missing.
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parents: 0
diff changeset
151 }
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parents: 0
diff changeset
152
0
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parents:
diff changeset
153 var ext;
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parents:
diff changeset
154 for (var i in extensions)
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parents:
diff changeset
155 if (type == extensions[i])
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parents:
diff changeset
156 ext = i;
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parents:
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157
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parents:
diff changeset
158 if (ext === undefined) {
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parents:
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159 console.log('Type MIME inconnu : '+type);
2
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parents: 1
diff changeset
160 svgError(res, 'Error: this user’s avatar is in an unknown format.');
0
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parents:
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161 return;
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parents:
diff changeset
162 }
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parents:
diff changeset
163
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parents:
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164 var binval = new Buffer(base64.replace(/\n/g, ''), 'base64');
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parents:
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165
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parents:
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166 fs.writeFile(config.directory+'/'+to+'.'+ext, binval, function() {
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parents:
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167 jids[to] = ext;
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parents:
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168 showImage(to, res);
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parents:
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169 });
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parents:
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170 } catch (e) {
2
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parents: 1
diff changeset
171 svgError(res, 'Error: this user doesn’t have an avatar in his/her vCard.');
0
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parents:
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172 }
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parents:
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173 }
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parents:
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174
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parents:
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175 function onError(stanza) {
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parents:
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176 if (stanza.getAttribute('type') == 'error')
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parents:
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177 return;
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parents:
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178
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parents:
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179 var from = stanza.getAttribute('to');
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180 var to = stanza.getAttribute('from');
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181 var id = stanza.getAttribute('id');
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parents:
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182
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parents:
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183 var response;
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parents:
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184 if (id)
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185 response = new Element(stanza.name, {to: to, from: from, id: id});
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parents:
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186 else
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187 response = new Element(stanza.name, {to: to, from: from});
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188
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189 conn.send(makeError(response));
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parents:
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190 }
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191
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192 var getVCard = function(jid, res) {
0
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193 var id = conn.getUniqueId();
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194
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195 var toSend = new Element('iq', {to: jid, from: config.jid, type: 'get', id: id})
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parents:
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196 .c('vCard', {xmlns: 'vcard-temp'});
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197
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198 conn.send(toSend);
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199
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200 sent[id] = res;
0
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parents:
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201 }
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parents:
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202
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parents:
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203 var showImage = function(jid, res) {
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204 var extension = jids[jid];
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205 var file = config.directory+'/'+jid+'.'+extension;
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206 res.writeHead(200, {'Content-Type': extensions[extension]});
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207 fs.readFile(file, function(err, data) {
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208 res.end(data);
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parents:
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209 });
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210 fs.stat(file, function(err, stats) {
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211 if (err) {
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212 console.log('Error when stat on “'+file+'”.');
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213 return;
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parents:
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214 }
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215
d5cfe54f11aa Initial commit.
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216 var last = new Date(stats.mtime);
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217 var now = new Date();
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218
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805f24754ff1 Don’t delete avatar on error, only allow update.
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219 if (now - last > 24*60*60*1000)
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220 getVCard(jid, res);
0
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221 });
d5cfe54f11aa Initial commit.
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parents:
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222 return;
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parents:
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223 }
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parents:
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224
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225 fs.readdir('data', function(err, files) {
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parents:
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226 if (err)
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227 process.exit('1');
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228
2
ad496e8a5e66 Use an image for errors instead of text (unusable in <img/>).
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229 for (var i in files) {
0
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230 var tab = /(.*)\.([a-z]{3})/.exec(files[i]);
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parents:
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231 jids[tab[1]] = tab[2];
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parents:
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232 }
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parents:
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233 });
d5cfe54f11aa Initial commit.
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234
d5cfe54f11aa Initial commit.
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235 http.createServer(function (req, res) {
d5cfe54f11aa Initial commit.
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236 console.log('Connection from '+req.client.remoteAddress+' ('+req.headers['user-agent']+') to get “'+req.url+'”.');
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parents:
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237
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parents:
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238 var easterEggs = {
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239 source: {
d5cfe54f11aa Initial commit.
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240 re: /^\/avatar\/source\/code$/,
d5cfe54f11aa Initial commit.
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241 file: process.argv[1],
d5cfe54f11aa Initial commit.
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242 mime: 'application/ecmascript',
d5cfe54f11aa Initial commit.
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243 error: 'source code unavailable! oO'
d5cfe54f11aa Initial commit.
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244 },
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245 README: {},
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246 COPYING: {},
d5cfe54f11aa Initial commit.
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parents:
diff changeset
247 };
d5cfe54f11aa Initial commit.
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248
d5cfe54f11aa Initial commit.
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249 req.setEncoding('utf-8');
d5cfe54f11aa Initial commit.
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250
d5cfe54f11aa Initial commit.
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parents:
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251 for (var i in easterEggs) {
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parents:
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252 var ee = easterEggs[i];
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253 var file = ee.file || i;
d5cfe54f11aa Initial commit.
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parents:
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254 var re = ee.re || new RegExp('^/avatar/'+file+'$');
d5cfe54f11aa Initial commit.
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parents:
diff changeset
255 if (re.test(req.url)) {
d5cfe54f11aa Initial commit.
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parents:
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256 fs.readFile(file, function(err, content) {
d5cfe54f11aa Initial commit.
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parents:
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257 if (err) {
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ad496e8a5e66 Use an image for errors instead of text (unusable in <img/>).
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258 svgError(res, 'Error: ' + (ee.error || file + ' unavailable.'));
0
d5cfe54f11aa Initial commit.
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259 return;
d5cfe54f11aa Initial commit.
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parents:
diff changeset
260 }
d5cfe54f11aa Initial commit.
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diff changeset
261 res.writeHead(200, {'Content-Type': ee.mime || 'text/plain'});
d5cfe54f11aa Initial commit.
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262 res.end(content);
d5cfe54f11aa Initial commit.
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parents:
diff changeset
263 });
d5cfe54f11aa Initial commit.
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264 return;
d5cfe54f11aa Initial commit.
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parents:
diff changeset
265 }
d5cfe54f11aa Initial commit.
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parents:
diff changeset
266 }
d5cfe54f11aa Initial commit.
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parents:
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267
d5cfe54f11aa Initial commit.
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268 var jid = unescape(req.url.replace(/^\/avatar\//, ''));
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269
d5cfe54f11aa Initial commit.
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270 if (jid === '') {
d5cfe54f11aa Initial commit.
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parents:
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271 res.writeHead(200, {'Content-Type': 'application/xhtml+xml'});
d5cfe54f11aa Initial commit.
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272 res.write('<?xml version="1.0" encoding="utf-8"?>\n');
d5cfe54f11aa Initial commit.
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273 res.write('<!DOCTYPE html>\n');
d5cfe54f11aa Initial commit.
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274 res.write('<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">\n');
d5cfe54f11aa Initial commit.
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parents:
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275 res.write('\t<head>\n');
d5cfe54f11aa Initial commit.
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276 res.write('\t\t<title>JavaScript XMPP Avatar Retriever</title>\n');
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parents:
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277 res.write('\t</head>\n');
d5cfe54f11aa Initial commit.
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parents:
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278 res.write('\t<body>\n');
d5cfe54f11aa Initial commit.
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279 res.write('\t\t<header><h1>JavaScript XMPP Avatar Retriever</h1></header>\n');
d5cfe54f11aa Initial commit.
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280 res.write('\t\t<p>Put any JID and get its avatar. :)</p>\n');
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parents:
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281 res.write('\t\t<form action="redirect" method="post">\n');
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282 res.write('\t\t\t<p>\n');
d5cfe54f11aa Initial commit.
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parents:
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283 res.write('\t\t\t\t<input name="jid" type="text" placeholder="you@yourserver.tld"/>\n');
d5cfe54f11aa Initial commit.
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parents:
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284 res.write('\t\t\t\t<input type="submit"/>\n');
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diff changeset
285 res.write('\t\t\t</p>\n');
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286 res.write('\t\t</form>\n');
2
ad496e8a5e66 Use an image for errors instead of text (unusable in <img/>).
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287 res.write('\t\t<footer><p>(<a href="README">README</a>, <a href="source/code">source code</a>, <a href="http://hg.linkmauve.fr/avatar">Mercurial repository</a>)</p></footer>\n');
0
d5cfe54f11aa Initial commit.
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parents:
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288 res.write('\t</body>\n');
d5cfe54f11aa Initial commit.
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parents:
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289 res.end('</html>\n');
d5cfe54f11aa Initial commit.
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290 return;
d5cfe54f11aa Initial commit.
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parents:
diff changeset
291 }
d5cfe54f11aa Initial commit.
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parents:
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292
d5cfe54f11aa Initial commit.
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parents:
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293 if (jid === 'redirect') {
d5cfe54f11aa Initial commit.
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parents:
diff changeset
294 if (req.method !== 'POST') {
d5cfe54f11aa Initial commit.
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295 res.writeHead(404, {'Content-Type': 'text/plain'});
d5cfe54f11aa Initial commit.
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parents:
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296 res.end('Error: redirect unavailable.');
d5cfe54f11aa Initial commit.
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parents:
diff changeset
297 return;
d5cfe54f11aa Initial commit.
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parents:
diff changeset
298 }
d5cfe54f11aa Initial commit.
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parents:
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299
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300 req.on('data', function(content) {
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301 console.log(content);
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302 var jid = unescape(content.toString()).replace(/^jid=/, '');
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303 res.writeHead(301, {'Location': jid});
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304 res.end();
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305 });
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306 return;
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307 }
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308
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309 if (jid in jids) {
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310 showImage(jid, res);
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311 return;
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312 }
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313
3
805f24754ff1 Don’t delete avatar on error, only allow update.
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314 getVCard(jid, res);
0
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315 }).listen(8032);