forked from GNUsocial/gnu-social
61 lines
2.1 KiB
PHP
61 lines
2.1 KiB
PHP
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<?php
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/**
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* Implementation of discovery using host-meta file
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*
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* Discovers resource descriptor file for a user by going to the
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* organization's host-meta file and trying to find a template for LRDD.
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*
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* @category Discovery
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* @package StatusNet
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* @author James Walker <james@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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class LRDDMethod_HostMeta extends LRDDMethod
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{
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/**
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* For RFC6415 and HTTP URIs, fetch the host-meta file
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* and look for LRDD templates
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*/
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public function discover($uri)
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{
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// This is allowed for RFC6415 but not the 'WebFinger' RFC7033.
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$try_schemes = array('https', 'http');
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$scheme = mb_strtolower(parse_url($uri, PHP_URL_SCHEME));
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switch ($scheme) {
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case 'acct':
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if (!Discovery::isAcct($uri)) {
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throw new Exception('Bad resource URI: '.$uri);
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}
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// We can't use parse_url data for this, since the 'host'
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// entry is only set if the scheme has '://' after it.
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list($user, $domain) = explode('@', parse_url($uri, PHP_URL_PATH));
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break;
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case 'http':
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case 'https':
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$domain = mb_strtolower(parse_url($uri, PHP_URL_HOST));
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$try_schemes = array($scheme);
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break;
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default:
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throw new Exception('Unable to discover resource descriptor endpoint.');
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}
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foreach ($try_schemes as $scheme) {
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$url = $scheme . '://' . $domain . '/.well-known/host-meta';
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try {
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$response = self::fetchUrl($url);
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$this->xrd->loadString($response->getBody());
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} catch (Exception $e) {
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common_debug('LRDD could not load resource descriptor: '.$url.' ('.$e->getMessage().')');
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continue;
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}
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return $this->xrd->links;
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}
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throw new Exception('Unable to retrieve resource descriptor links.');
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}
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}
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