3 * StatusNet - the distributed open-source microblogging tool
4 * Copyright (C) 2010, StatusNet, Inc.
6 * A sample module to show best practices for StatusNet plugins
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU Affero General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Affero General Public License for more details.
20 * You should have received a copy of the GNU Affero General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * @author James Walker <james@status.net>
25 * @copyright 2010 StatusNet, Inc.
26 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
27 * @link http://status.net/
30 define('WEBFINGER_SERVICE_REL_VALUE', 'lrdd');
33 * Implement the webfinger protocol.
38 const PROFILEPAGE = 'http://webfinger.net/rel/profile-page';
39 const UPDATESFROM = 'http://schemas.google.com/g/2010#updates-from';
40 const HCARD = 'http://microformats.org/profile/hcard';
43 * Perform a webfinger lookup given an account.
46 public function lookup($id)
48 $id = $this->normalize($id);
49 list($name, $domain) = explode('@', $id);
51 $links = $this->getServiceLinks($domain);
57 foreach ($links as $link) {
58 if ($link['template']) {
59 return $this->getServiceDescription($link['template'], $id);
62 return $this->getServiceDescription($link['href'], $id);
68 * Normalize an account ID
70 function normalize($id)
72 if (substr($id, 0, 7) == 'acct://') {
73 return substr($id, 7);
74 } else if (substr($id, 0, 5) == 'acct:') {
75 return substr($id, 5);
81 function getServiceLinks($domain)
83 $url = 'http://'. $domain .'/.well-known/host-meta';
85 $content = $this->fetchURL($url);
87 if (empty($content)) {
88 common_log(LOG_DEBUG, 'Error fetching host-meta');
92 $result = XRD::parse($content);
94 // Ensure that the host == domain (spec may include signing later)
95 if ($result->host != $domain) {
100 foreach ($result->links as $link) {
101 if ($link['rel'] == WEBFINGER_SERVICE_REL_VALUE) {
109 function getServiceDescription($template, $id)
111 $url = $this->applyTemplate($template, 'acct:' . $id);
113 $content = $this->fetchURL($url);
119 return XRD::parse($content);
122 function fetchURL($url)
125 $c = Cache::instance();
126 $content = $c->get('webfinger:url:'.$url);
127 if ($content !== false) {
130 $client = new HTTPClient();
131 $response = $client->get($url);
132 } catch (HTTP_Request2_Exception $e) {
136 if ($response->getStatus() != 200) {
140 $body = $response->getBody();
142 $c->set('webfinger:url:'.$url, $body);
147 function applyTemplate($template, $id)
149 $template = str_replace('{uri}', urlencode($id), $template);
154 function getHostMeta($domain, $template) {
156 $xrd->host = $domain;
157 $xrd->links[] = array('rel' => 'lrdd',
158 'template' => $template,
159 'title' => array('Resource Descriptor'));
161 return $xrd->toXML();