Mercurial > eldonilo > avatar
annotate avatar.js @ 20:e4916f1763e5
Deactivable debug; fix a stupid bug in gravatar; add a better default image and make it configurable.
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Sat, 16 Jul 2011 13:54:47 +0200 |
parents | 9ff8f951da99 |
children | 46c42ec52680 |
rev | line source |
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0 | 1 #!/usr/bin/env node |
2 | |
3 /* | |
4 * Copyright (C) 2011 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> | |
5 * | |
6 * This file is the source code of an XMPP avatar retriever. | |
7 * | |
8 * This program is free software: you can redistribute it and/or modify | |
9 * it under the terms of the GNU Affero General Public License as | |
10 * published by the Free Software Foundation, version 3 of the License. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, | |
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 * GNU Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 */ | |
20 | |
21 'use strict'; | |
22 | |
23 var config = require('./configuration'); | |
24 | |
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25 var util = require('util'); |
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26 var fs = require('fs'); |
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27 var http = require('http'); |
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28 |
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29 if (config.useGravatar) |
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30 var hash = require('crypto').createHash; |
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31 |
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32 var xmpp = require('node-xmpp'); |
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33 var conn = new xmpp.Client(config); |
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34 var Element = require('ltx').Element; |
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35 |
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36 Element.prototype.getAttribute = function(name) { |
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37 return this.attrs[name]; |
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38 }; |
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39 |
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40 process.addListener('uncaughtException', function (err) { |
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41 console.log('[41;1mUncaught exception (' + err + '), this should never happen:[0m\n' + err.stack); |
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42 }); |
0 | 43 |
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44 if (config.debug) |
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45 (function() { |
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46 var send = conn.send; |
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47 conn.send = function(s) { |
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48 console.log('Sent: [1;32m' + s + '[0m'); |
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49 send.call(conn, s); |
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50 }; |
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51 })(); |
0 | 52 |
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53 conn.on('online', function () { |
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54 util.log('Connected'); |
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55 }); |
0 | 56 |
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57 conn.on('stanza', function (stanza) { |
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58 if (config.debug) |
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59 console.log('Recv: [1;34m' + stanza + '[0m'); |
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60 |
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61 if (stanza.is('iq')) |
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62 onIq(stanza); |
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63 else |
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64 onError(stanza); |
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65 }); |
0 | 66 |
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67 var getUniqueId = (function() { |
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68 var id = 0; |
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69 return function() { |
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70 return ++id; |
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71 }; |
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72 })(); |
0 | 73 |
74 var jids = {}; | |
75 | |
76 var sent = {}; | |
77 | |
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78 var svgError = function(res, message) { |
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79 util.log('No avatar at all, display a default image with the error in the title.'); |
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80 |
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81 res.writeHead(200, {'Content-Type': 'image/svg+xml'}); |
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82 res.write('<?xml version="1.0" encoding="UTF-8"?>\n'); |
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83 res.write('<svg xmlns="http://www.w3.org/2000/svg"'); |
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84 |
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85 if (config.defaultImage) |
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86 res.write(' xmlns:xlink="http://www.w3.org/1999/xlink"'); |
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87 |
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88 res.write(' viewBox="0 0 64 64">\n'); |
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89 res.write('\t<title>' + message + '</title>\n'); |
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90 |
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91 if (config.defaultImage) |
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92 res.write('\t<image width="64" height="64" xlink:href="' + config.defaultImage + '"/>\n'); |
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93 else { |
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94 res.write('\t<rect width="64" height="64" fill="silver"/>\n'); |
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95 res.write('\t<circle cx="32" cy="26" r="14" fill="white"/>\n'); |
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96 res.write('\t<ellipse cx="32" cy="64" rx="24" ry="26" fill="white"/>\n'); |
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97 } |
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98 |
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99 res.end('</svg>\n'); |
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100 } |
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101 |
0 | 102 var makeError = function(response) { |
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103 response.attrs.type = 'error'; |
0 | 104 |
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105 response.c('error', {type: 'cancel'}) |
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106 .c('feature-not-implemented', {xmlns: 'urn:ietf:params:xml:ns:xmpp-stanzas'}); |
0 | 107 |
108 return response; | |
109 } | |
110 | |
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111 if (config.useGravatar) |
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112 var noAvatar = function(res, to, message) { |
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113 var options = { |
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114 host: 'gravatar.com', |
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115 port: 80, |
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116 path: '/avatar/' + hash('md5').update(to).digest('hex') + '?d=404', |
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117 method: 'GET' |
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118 }; |
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119 |
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120 util.log('No XMPP avatar, falling back to Gravatar for ' + to + '.'); |
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121 |
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122 var r = http.request(options, function(r) { |
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123 if (r.statusCode != 200) |
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124 return svgError(res, message + ' Additionaly, no gravatar available.'); |
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125 |
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126 res.writeHead(200, r.headers['Content-Type']); |
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127 r.setEncoding('utf8'); |
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128 r.on('data', function(chunk) { |
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129 res.write(chunk); |
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130 }); |
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131 r.on('end', function() { |
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132 res.end(); |
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133 }); |
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134 }); |
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135 |
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136 r.on('error', function(e) { |
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137 return svgError(res, message + ' Additionaly, problem with gravatar request: ' + e.message); |
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138 }); |
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139 |
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140 return r.end(); |
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141 }; |
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142 else |
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143 var noAvatar = function(res, to, message) { |
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144 util.log('No XMPP avatar for ' + to + '.'); |
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145 return svgError(res, message); |
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146 }; |
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147 |
0 | 148 function onIq(stanza) { |
149 var type = stanza.getAttribute('type'); | |
150 var from = stanza.getAttribute('to'); | |
151 var to = stanza.getAttribute('from'); | |
152 var id = stanza.getAttribute('id'); | |
153 | |
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154 var response = new Element('iq', {to: to, from: from, type: 'result'}); |
0 | 155 if (id) |
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156 response.attrs.id = id; |
0 | 157 |
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158 if (!sent[id]) |
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159 return conn.send(makeError(response)); |
0 | 160 |
161 var res = sent[id]; | |
162 delete sent[id]; | |
163 | |
164 if (type == 'error') { | |
165 try { | |
166 var err = stanza.getChild('error').getChild().name; | |
167 } catch (e) { | |
168 var err = 'none'; | |
169 } | |
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170 |
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171 return noAvatar(res, to, 'Error during query of this user’s vCard: “'+err+'”.'); |
0 | 172 } |
173 | |
174 var vCard = stanza.getChild('vCard', 'vcard-temp'); | |
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175 if (!vCard) |
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176 return noAvatar(res, to, 'Error: this user doesn’t have a vCard.'); |
0 | 177 |
178 try { | |
179 var photo = vCard.getChild('PHOTO', 'vcard-temp'); | |
180 var base64 = photo.getChild('BINVAL', 'vcard-temp').getText(); | |
181 | |
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182 try { |
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183 var type = photo.getChild('TYPE', 'vcard-temp').getText(); |
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184 } catch (e) { |
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185 if (config.guessType) |
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186 type = 'image/png'; // FIXME: use magic. |
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187 else |
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188 return noAvatar(res, to, 'Error: this user’s vCard doesn’t specify the MIME type of its avatar.'); |
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189 } |
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190 |
0 | 191 var ext; |
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192 for (var i in config.extensions) |
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193 if (type == config.extensions[i]) |
0 | 194 ext = i; |
195 | |
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196 // Here we don’t try to guess the extension even if the option is set. |
0 | 197 if (ext === undefined) { |
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198 console.log('Unknown MIME type: '+type); |
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199 return noAvatar(res, to, 'Error: this user’s avatar is in an unknown format.'); |
0 | 200 } |
201 | |
202 var binval = new Buffer(base64.replace(/\n/g, ''), 'base64'); | |
203 | |
204 fs.writeFile(config.directory+'/'+to+'.'+ext, binval, function() { | |
205 jids[to] = ext; | |
206 showImage(to, res); | |
207 }); | |
208 } catch (e) { | |
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209 return noAvatar(res, to, 'Error: this user doesn’t have an avatar in his/her vCard.'); |
0 | 210 } |
211 } | |
212 | |
213 function onError(stanza) { | |
214 if (stanza.getAttribute('type') == 'error') | |
215 return; | |
216 | |
217 var from = stanza.getAttribute('to'); | |
218 var to = stanza.getAttribute('from'); | |
219 var id = stanza.getAttribute('id'); | |
220 | |
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221 var response = new Element(stanza.name, {to: to, from: from}); |
0 | 222 if (id) |
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223 response.attrs.id = id; |
0 | 224 |
225 conn.send(makeError(response)); | |
226 } | |
227 | |
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228 var getVCard = function(jid, res) { |
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229 var id = getUniqueId(); |
0 | 230 |
231 var toSend = new Element('iq', {to: jid, from: config.jid, type: 'get', id: id}) | |
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232 .c('vCard', {xmlns: 'vcard-temp'}) |
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233 .up(); |
0 | 234 |
235 conn.send(toSend); | |
236 | |
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237 sent[id] = res; |
0 | 238 } |
239 | |
240 var showImage = function(jid, res) { | |
241 var extension = jids[jid]; | |
242 var file = config.directory+'/'+jid+'.'+extension; | |
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243 var now = new Date; |
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244 res.writeHead(200, {'Content-Type': config.extensions[extension], Expires: new Date(config.expire * 1000 + now.getTime())}); |
0 | 245 fs.readFile(file, function(err, data) { |
246 res.end(data); | |
247 }); | |
248 fs.stat(file, function(err, stats) { | |
249 if (err) { | |
250 console.log('Error when stat on “'+file+'”.'); | |
251 return; | |
252 } | |
253 | |
254 var last = new Date(stats.mtime); | |
255 | |
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256 if (now - last > config.expire * 1000) |
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257 getVCard(jid, res); |
0 | 258 }); |
259 return; | |
260 } | |
261 | |
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262 fs.readdir(config.directory, function(err, files) { |
0 | 263 if (err) |
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264 return fs.mkdir(config.directory, 488); // Actually 0750 |
0 | 265 |
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266 for (var i in files) { |
0 | 267 var tab = /(.*)\.([a-z]{3})/.exec(files[i]); |
268 jids[tab[1]] = tab[2]; | |
269 } | |
270 }); | |
271 | |
272 http.createServer(function (req, res) { | |
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273 util.log('Connection from ' + (req.headers['x-forwarded-for'] || req.client.remoteAddress) + ' (' + req.headers['user-agent'] + ') to ' + req.method.toLocaleLowerCase() + ' “' + req.url + '”.'); |
0 | 274 |
275 var easterEggs = { | |
276 source: { | |
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277 re: new RegExp('^' + config.webRoot + 'source/code$'), |
0 | 278 file: process.argv[1], |
279 mime: 'application/ecmascript', | |
280 error: 'source code unavailable! oO' | |
281 }, | |
282 README: {}, | |
283 COPYING: {}, | |
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284 'index.xhtml': { |
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285 re: /\/(index.xhtml)?$/, |
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286 mime: 'application/xhtml+xml', |
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287 error: '<h1 xmlns="http://www.w3.org/1999/xhtml">Index file not available.</h1>' |
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288 } |
0 | 289 }; |
290 | |
291 req.setEncoding('utf-8'); | |
292 | |
293 for (var i in easterEggs) { | |
294 var ee = easterEggs[i]; | |
295 var file = ee.file || i; | |
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296 var re = ee.re || new RegExp('^' + config.webRoot + file + '$'); |
0 | 297 if (re.test(req.url)) { |
298 fs.readFile(file, function(err, content) { | |
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299 if (err) |
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300 return noAvatar(res, to, 'Error: ' + (ee.error || file + ' unavailable.')); |
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301 |
0 | 302 res.writeHead(200, {'Content-Type': ee.mime || 'text/plain'}); |
303 res.end(content); | |
304 }); | |
305 return; | |
306 } | |
307 } | |
308 | |
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309 var jid = unescape(req.url.replace(new RegExp('^' + config.webRoot), '')); |
0 | 310 |
311 if (jid === 'redirect') { | |
312 if (req.method !== 'POST') { | |
313 res.writeHead(404, {'Content-Type': 'text/plain'}); | |
314 res.end('Error: redirect unavailable.'); | |
315 return; | |
316 } | |
317 | |
318 req.on('data', function(content) { | |
319 var jid = unescape(content.toString()).replace(/^jid=/, ''); | |
320 res.writeHead(301, {'Location': jid}); | |
321 res.end(); | |
322 }); | |
323 return; | |
324 } | |
325 | |
326 if (jid in jids) { | |
327 showImage(jid, res); | |
328 return; | |
329 } | |
330 | |
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331 getVCard(jid, res); |
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332 }).listen(config.webPort, config.webHost); |