]> git.mxchange.org Git - friendica.git/blob - src/Worker/CheckRelMeProfileLink.php
avoide useless cURL request to the profile page
[friendica.git] / 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]);
58                 $homepageUrlVerified = false;
59                 $owner = User::getOwnerDataById($uid);
60                 if (!empty($owner['homepage'])) {
61                         $xrd_timeout = DI::config()->get('system', 'xrd_timeout', 20);
62                         $curlResult = DI::httpClient()->get($owner['homepage'], $accept_content = HttpClientAccept::HTML, [HttpClientOptions::TIMEOUT => $xrd_timeout]);
63                         if ($curlResult->isTimeout()) {
64                                 Logger::notice('Could not check homepage link of the user because the page loading request timed out.', [$uid, $owner['homepage']]);
65                         } else {
66                                 $content = $curlResult->getBody();
67                                 if (!$content) {
68                                         Logger::notice('Empty body of the fetched homepage link). Cannot verify the relation to profile of UID %s.', [$uid, $owner['homepage']]);
69                                 } else {
70                                         $doc = new DOMDocument();
71                                         $doc->loadHTML($content);
72                                         if (!$doc) {
73                                                 Logger::notice('Could not parse the content');
74                                         } else {
75                                                 foreach ($doc->getElementsByTagName('a') as $link) {
76                                                         $rel = $link->getAttribute('rel');
77                                                         if ($rel == 'me') {
78                                                                 $href = $link->getAttribute('href');
79                                                                 if (!$homepageUrlVerified && Network::isValidHttpUrl($href)) {
80                                                                         $homepageUrlVerified = Strings::compareLink($owner['url'], $href);
81                                                                 }
82                                                         }
83                                                 }
84                                         }
85                                         if ($homepageUrlVerified) {
86                                                 Profile::update(['homepage_verified' => true], $uid);
87                                                 Logger::notice('Homepage URL verified', [$uid, $owner['homepage']]);
88                                         } else {
89                                                 Profile::update(['homepage_verified' => false], $uid);
90                                                 Logger::notice('Homepage URL could not be verified', [$uid, $owner['homepage']]);
91                                         }
92                                 }
93                         }
94                 } else {
95                         Logger::notice('The user has no homepage link.', [$uid]);
96                         Profile::update(['homepage_verified' => false], $uid);
97                 }
98         }
99 }