src/Worker/CheckRelMeProfileLink.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  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 <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Worker;
  23
  24 use DOMDocument;
  25 use Friendica\DI;
  26 use Friendica\Core\Logger;
  27 use Friendica\Model\Profile;
  28 use Friendica\Model\User;
  29 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
  30 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
  31 use Friendica\Util\Network;
  32 use Friendica\Util\Strings;
  33
  34 /* This class is used to verify the homepage link of a user profile.
  35  * To do so, we look for rel="me" links in the given homepage, if one
  36  * of them points to the Friendica profile of the user, a verification
  37  * mark is added to the link.
  38  *
  39  * To reverse the process, if a homepage link is given, it is displayed
  40  * with the rel="me" attribute as well, so that 3rd party tools can
  41  * verify the connection between the two pages.
  42  *
  43  * This task will be performed by the worker on a daily basis _and_ every
  44  * time the user changes their homepage link. In the first case the priority
  45  * of the task is set to LOW, with the second case it is MEDIUM.
  46  *
  47  * rel-me microformat docs https://microformats.org/wiki/rel-me
  48  */
  49 class CheckRelMeProfileLink
  50 {
  51         /* Cheks the homepage of a profile for a rel-me link back to the user profile
  52          *
  53          * @param $uid (int) the UID of the user
  54          */
  55         public static function execute(int $uid)
  56         {
  57                 Logger::notice('Verifying the homepage', ['uid' => $uid]);
  58                 Profile::update(['homepage_verified' => false], $uid);
  59                 $homepageUrlVerified = false;
  60                 $owner               = User::getOwnerDataById($uid);
  61                 if (!empty($owner['homepage'])) {
  62                         $xrd_timeout = DI::config()->get('system', 'xrd_timeout');
  63                         $curlResult  = DI::httpClient()->get($owner['homepage'], $accept_content = HttpClientAccept::HTML, [HttpClientOptions::TIMEOUT => $xrd_timeout]);
  64                         if ($curlResult->isSuccess()) {
  65                                 $content = $curlResult->getBody();
  66                                 if (!$content) {
  67                                         Logger::notice('Empty body of the fetched homepage link). Cannot verify the relation to profile of UID %s.', ['uid' => $uid, 'owner homepage' => $owner['homepage']]);
  68                                 } else {
  69                                         $doc = new DOMDocument();
  70                                         $doc->loadHTML($content);
  71                                         if (!$doc) {
  72                                                 Logger::notice('Could not parse the content');
  73                                         } else {
  74                                                 foreach ($doc->getElementsByTagName('a') as $link) {
  75                                                         $rel = $link->getAttribute('rel');
  76                                                         if ($rel == 'me') {
  77                                                                 $href = $link->getAttribute('href');
  78                                                                 if (!$homepageUrlVerified && Network::isValidHttpUrl($href)) {
  79                                                                         $homepageUrlVerified = Strings::compareLink($owner['url'], $href);
  80                                                                 }
  81                                                         }
  82                                                 }
  83                                         }
  84                                         if ($homepageUrlVerified) {
  85                                                 Profile::update(['homepage_verified' => true], $uid);
  86                                                 Logger::notice('Homepage URL verified', ['uid' => $uid, 'owner homepage' => $owner['homepage']]);
  87                                         } else {
  88                                                 Logger::notice('Homepage URL could not be verified', ['uid' => $uid, 'owner homepage' => $owner['homepage']]);
  89                                         }
  90                                 }
  91                         } else {
  92                                 Logger::notice('Could not cURL the homepage URL', ['owner homepage' => $owner['homepage']]);
  93                         }
  94                 } else {
  95                         Logger::notice('The user has no homepage link.', ['uid' => $uid]);
  96                 }
  97         }
  98 }