87 lines
3.0 KiB
PHP
87 lines
3.0 KiB
PHP
<?php
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declare(strict_types = 1);
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namespace Component\FreeNetwork\Util\LrddMethod;
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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use App\Core\Log;
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use Component\FreeNetwork\Util\Discovery;
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use Component\FreeNetwork\Util\LrddMethod;
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use Exception;
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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 GNUsocial
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*
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* @author James Walker <james@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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class LrddMethodHostMeta 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 = ['https', 'http'];
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$scheme = mb_strtolower(parse_url($uri, \PHP_URL_SCHEME));
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switch ($scheme) {
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case 'acct':
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// We can't use parse_url data for this, since the 'host'
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// entry is only set if the scheme has '://' after it.
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$parts = explode('@', parse_url($uri, \PHP_URL_PATH), 2);
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if (!Discovery::isAcct($uri) || \count($parts) != 2) {
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throw new Exception('Bad resource URI: ' . $uri);
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}
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[, $domain] = $parts;
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break;
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case 'http':
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case 'https':
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$domain = mb_strtolower(parse_url($uri, \PHP_URL_HOST));
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$try_schemes = [$scheme];
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break;
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default:
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throw new Exception('Unable to discover resource descriptor endpoint.');
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}
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foreach ($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->getContent());
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} catch (Exception $e) {
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Log::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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