3 * @copyright Copyright (C) 2020, Friendica
5 * @license GNU AGPL version 3 or any later version
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.
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.
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/>.
22 namespace Friendica\Model;
26 use Friendica\Core\Logger;
27 use Friendica\Core\Protocol;
28 use Friendica\Core\System;
29 use Friendica\Core\Worker;
30 use Friendica\Database\DBA;
32 use Friendica\Module\Register;
33 use Friendica\Network\CurlResult;
34 use Friendica\Protocol\Diaspora;
35 use Friendica\Util\DateTimeFormat;
36 use Friendica\Util\Network;
37 use Friendica\Util\Strings;
38 use Friendica\Util\XML;
41 * This class handles GServer related functions
48 const DT_MASTODON = 2;
50 // Methods to detect server types
52 // Non endpoint specific methods
53 const DETECT_MANUAL = 0;
54 const DETECT_HEADER = 1;
55 const DETECT_BODY = 2;
57 // Implementation specific endpoints
58 const DETECT_FRIENDIKA = 10;
59 const DETECT_FRIENDICA = 11;
60 const DETECT_STATUSNET = 12;
61 const DETECT_GNUSOCIAL = 13;
62 const DETECT_CONFIG_JSON = 14; // Statusnet, GNU Social, Older Hubzilla/Redmatrix
63 const DETECT_SITEINFO_JSON = 15; // Newer Hubzilla
64 const DETECT_MASTODON_API = 16;
65 const DETECT_STATUS_PHP = 17; // Nextcloud
67 // Standardized endpoints
68 const DETECT_STATISTICS_JSON = 100;
69 const DETECT_NODEINFO_1 = 101;
70 const DETECT_NODEINFO_2 = 102;
73 * Get the ID for the given server URL
76 * @param boolean $no_check Don't check if the server hadn't been found
77 * @return int gserver id
79 public static function getID(string $url, bool $no_check = false)
85 $url = self::cleanURL($url);
87 $gserver = DBA::selectFirst('gserver', ['id'], ['nurl' => Strings::normaliseLink($url)]);
88 if (DBA::isResult($gserver)) {
89 Logger::info('Got ID for URL', ['id' => $gserver['id'], 'url' => $url, 'callstack' => System::callstack(20)]);
90 return $gserver['id'];
93 if ($no_check || !self::check($url)) {
97 return self::getID($url, true);
101 * Checks if the given server is reachable
103 * @param string $profile URL of the given profile
104 * @param string $server URL of the given server (If empty, taken from profile)
105 * @param string $network Network value that is used, when detection failed
106 * @param boolean $force Force an update.
108 * @return boolean 'true' if server seems vital
110 public static function reachable(string $profile, string $server = '', string $network = '', bool $force = false)
113 $contact = Contact::getByURL($profile, null, ['baseurl']);
114 if (!empty($contact['baseurl'])) {
115 $server = $contact['baseurl'];
123 return self::check($server, $network, $force);
127 * Decides if a server needs to be updated, based upon several date fields
129 * @param date $created Creation date of that server entry
130 * @param date $updated When had the server entry be updated
131 * @param date $last_failure Last failure when contacting that server
132 * @param date $last_contact Last time the server had been contacted
134 * @return boolean Does the server record needs an update?
136 public static function updateNeeded($created, $updated, $last_failure, $last_contact)
138 $now = strtotime(DateTimeFormat::utcNow());
140 if ($updated > $last_contact) {
141 $contact_time = strtotime($updated);
143 $contact_time = strtotime($last_contact);
146 $failure_time = strtotime($last_failure);
147 $created_time = strtotime($created);
149 // If there is no "created" time then use the current time
150 if ($created_time <= 0) {
151 $created_time = $now;
154 // If the last contact was less than 24 hours then don't update
155 if (($now - $contact_time) < (60 * 60 * 24)) {
159 // If the last failure was less than 24 hours then don't update
160 if (($now - $failure_time) < (60 * 60 * 24)) {
164 // If the last contact was less than a week ago and the last failure is older than a week then don't update
165 //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) && ($contact_time > $failure_time))
168 // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
169 if ((($now - $contact_time) > (60 * 60 * 24 * 7)) && (($now - $created_time) > (60 * 60 * 24 * 7)) && (($now - $failure_time) < (60 * 60 * 24 * 7))) {
173 // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
174 if ((($now - $contact_time) > (60 * 60 * 24 * 30)) && (($now - $created_time) > (60 * 60 * 24 * 30)) && (($now - $failure_time) < (60 * 60 * 24 * 30))) {
182 * Checks the state of the given server.
184 * @param string $server_url URL of the given server
185 * @param string $network Network value that is used, when detection failed
186 * @param boolean $force Force an update.
187 * @param boolean $only_nodeinfo Only use nodeinfo for server detection
189 * @return boolean 'true' if server seems vital
191 public static function check(string $server_url, string $network = '', bool $force = false, bool $only_nodeinfo = false)
193 $server_url = self::cleanURL($server_url);
195 if ($server_url == '') {
199 $gserver = DBA::selectFirst('gserver', [], ['nurl' => Strings::normaliseLink($server_url)]);
200 if (DBA::isResult($gserver)) {
201 if ($gserver['created'] <= DBA::NULL_DATETIME) {
202 $fields = ['created' => DateTimeFormat::utcNow()];
203 $condition = ['nurl' => Strings::normaliseLink($server_url)];
204 DBA::update('gserver', $fields, $condition);
207 $last_contact = $gserver['last_contact'];
208 $last_failure = $gserver['last_failure'];
210 // See discussion under https://forum.friendi.ca/display/0b6b25a8135aabc37a5a0f5684081633
211 // It can happen that a zero date is in the database, but storing it again is forbidden.
212 if ($last_contact < DBA::NULL_DATETIME) {
213 $last_contact = DBA::NULL_DATETIME;
216 if ($last_failure < DBA::NULL_DATETIME) {
217 $last_failure = DBA::NULL_DATETIME;
220 if (!$force && !self::updateNeeded($gserver['created'], '', $last_failure, $last_contact)) {
221 Logger::info('No update needed', ['server' => $server_url]);
222 return ($last_contact >= $last_failure);
224 Logger::info('Server is outdated. Start discovery.', ['Server' => $server_url, 'Force' => $force, 'Created' => $gserver['created'], 'Failure' => $last_failure, 'Contact' => $last_contact]);
226 Logger::info('Server is unknown. Start discovery.', ['Server' => $server_url]);
229 return self::detect($server_url, $network, $only_nodeinfo);
233 * Set failed server status
237 private static function setFailure(string $url)
239 if (DBA::exists('gserver', ['nurl' => Strings::normaliseLink($url)])) {
240 DBA::update('gserver', ['failed' => true, 'last_failure' => DateTimeFormat::utcNow(), 'detection-method' => null],
241 ['nurl' => Strings::normaliseLink($url)]);
242 Logger::info('Set failed status for existing server', ['url' => $url]);
245 DBA::insert('gserver', ['url' => $url, 'nurl' => Strings::normaliseLink($url),
246 'network' => Protocol::PHANTOM, 'created' => DateTimeFormat::utcNow(),
247 'failed' => true, 'last_failure' => DateTimeFormat::utcNow()]);
248 Logger::info('Set failed status for new server', ['url' => $url]);
252 * Remove unwanted content from the given URL
255 * @return string cleaned URL
257 public static function cleanURL(string $url)
259 $url = trim($url, '/');
260 $url = str_replace('/index.php', '', $url);
262 $urlparts = parse_url($url);
263 unset($urlparts['user']);
264 unset($urlparts['pass']);
265 unset($urlparts['query']);
266 unset($urlparts['fragment']);
267 return Network::unparseURL($urlparts);
271 * Return the base URL
274 * @return string base URL
276 private static function getBaseURL(string $url)
278 $urlparts = parse_url(self::cleanURL($url));
279 unset($urlparts['path']);
280 return Network::unparseURL($urlparts);
284 * Detect server data (type, protocol, version number, ...)
285 * The detected data is then updated or inserted in the gserver table.
287 * @param string $url URL of the given server
288 * @param string $network Network value that is used, when detection failed
289 * @param boolean $only_nodeinfo Only use nodeinfo for server detection
291 * @return boolean 'true' if server could be detected
293 public static function detect(string $url, string $network = '', bool $only_nodeinfo = false)
295 Logger::info('Detect server type', ['server' => $url]);
296 $serverdata = ['detection-method' => self::DETECT_MANUAL];
298 $original_url = $url;
300 // Remove URL content that is not supposed to exist for a server url
301 $url = self::cleanURL($url);
304 $baseurl = self::getBaseURL($url);
306 // If the URL missmatches, then we mark the old entry as failure
307 if ($url != $original_url) {
308 DBA::update('gserver', ['failed' => true, 'last_failure' => DateTimeFormat::utcNow()],
309 ['nurl' => Strings::normaliseLink($original_url)]);
312 // When a nodeinfo is present, we don't need to dig further
313 $xrd_timeout = DI::config()->get('system', 'xrd_timeout');
314 $curlResult = DI::httpRequest()->get($url . '/.well-known/nodeinfo', false, ['timeout' => $xrd_timeout]);
315 if ($curlResult->isTimeout()) {
316 self::setFailure($url);
320 $nodeinfo = self::fetchNodeinfo($url, $curlResult);
321 if ($only_nodeinfo && empty($nodeinfo)) {
322 Logger::info('Invalid nodeinfo in nodeinfo-mode, server is marked as failure', ['url' => $url]);
323 self::setFailure($url);
327 // When nodeinfo isn't present, we use the older 'statistics.json' endpoint
328 if (empty($nodeinfo)) {
329 $nodeinfo = self::fetchStatistics($url);
332 // If that didn't work out well, we use some protocol specific endpoints
333 // For Friendica and Zot based networks we have to dive deeper to reveal more details
334 if (empty($nodeinfo['network']) || in_array($nodeinfo['network'], [Protocol::DFRN, Protocol::ZOT])) {
335 if (!empty($nodeinfo['detection-method'])) {
336 $serverdata['detection-method'] = $nodeinfo['detection-method'];
339 // Fetch the landing page, possibly it reveals some data
340 if (empty($nodeinfo['network'])) {
341 if ($baseurl == $url) {
342 $basedata = $serverdata;
344 $basedata = ['detection-method' => self::DETECT_MANUAL];
347 $curlResult = DI::httpRequest()->get($baseurl, false, ['timeout' => $xrd_timeout]);
348 if ($curlResult->isSuccess()) {
349 $basedata = self::analyseRootHeader($curlResult, $basedata);
350 $basedata = self::analyseRootBody($curlResult, $basedata, $baseurl);
353 if (!$curlResult->isSuccess() || empty($curlResult->getBody()) || self::invalidBody($curlResult->getBody())) {
354 self::setFailure($url);
358 if ($baseurl == $url) {
359 $serverdata = $basedata;
361 // When the base path doesn't seem to contain a social network we try the complete path.
362 // Most detectable system have to be installed in the root directory.
363 // We checked the base to avoid false positives.
364 $curlResult = DI::httpRequest()->get($url, false, ['timeout' => $xrd_timeout]);
365 if ($curlResult->isSuccess()) {
366 $urldata = self::analyseRootHeader($curlResult, $serverdata);
367 $urldata = self::analyseRootBody($curlResult, $urldata, $url);
369 $comparebase = $basedata;
370 unset($comparebase['info']);
371 unset($comparebase['site_name']);
372 $compareurl = $urldata;
373 unset($compareurl['info']);
374 unset($compareurl['site_name']);
376 // We assume that no one will install the identical system in the root and a subfolder
377 if (!empty(array_diff($comparebase, $compareurl))) {
378 $serverdata = $urldata;
384 if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ACTIVITYPUB)) {
385 $serverdata = self::detectMastodonAlikes($url, $serverdata);
388 // All following checks are done for systems that always have got a "host-meta" endpoint.
389 // With this check we don't have to waste time and ressources for dead systems.
390 // Also this hopefully prevents us from receiving abuse messages.
391 if (empty($serverdata['network']) && !self::validHostMeta($url)) {
392 self::setFailure($url);
396 if (empty($serverdata['network']) || in_array($serverdata['network'], [Protocol::DFRN, Protocol::ACTIVITYPUB])) {
397 $serverdata = self::detectFriendica($url, $serverdata);
400 // the 'siteinfo.json' is some specific endpoint of Hubzilla and Red
401 if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ZOT)) {
402 $serverdata = self::fetchSiteinfo($url, $serverdata);
405 // The 'siteinfo.json' doesn't seem to be present on older Hubzilla installations
406 if (empty($serverdata['network'])) {
407 $serverdata = self::detectHubzilla($url, $serverdata);
410 if (empty($serverdata['network'])) {
411 $serverdata = self::detectNextcloud($url, $serverdata);
414 if (empty($serverdata['network'])) {
415 $serverdata = self::detectGNUSocial($url, $serverdata);
418 $serverdata = array_merge($nodeinfo, $serverdata);
420 $serverdata = $nodeinfo;
423 // Detect the directory type
424 $serverdata['directory-type'] = self::DT_NONE;
425 $serverdata = self::checkPoCo($url, $serverdata);
426 $serverdata = self::checkMastodonDirectory($url, $serverdata);
428 // We can't detect the network type. Possibly it is some system that we don't know yet
429 if (empty($serverdata['network'])) {
430 $serverdata['network'] = Protocol::PHANTOM;
433 // When we hadn't been able to detect the network type, we use the hint from the parameter
434 if (($serverdata['network'] == Protocol::PHANTOM) && !empty($network)) {
435 $serverdata['network'] = $network;
438 $serverdata['url'] = $url;
439 $serverdata['nurl'] = Strings::normaliseLink($url);
441 // We take the highest number that we do find
442 $registeredUsers = $serverdata['registered-users'] ?? 0;
444 // On an active server there has to be at least a single user
445 if (($serverdata['network'] != Protocol::PHANTOM) && ($registeredUsers == 0)) {
446 $registeredUsers = 1;
449 if ($serverdata['network'] == Protocol::PHANTOM) {
450 $serverdata['registered-users'] = $registeredUsers;
451 $serverdata = self::detectNetworkViaContacts($url, $serverdata);
454 $serverdata['last_contact'] = DateTimeFormat::utcNow();
455 $serverdata['failed'] = false;
457 $gserver = DBA::selectFirst('gserver', ['network'], ['nurl' => Strings::normaliseLink($url)]);
458 if (!DBA::isResult($gserver)) {
459 $serverdata['created'] = DateTimeFormat::utcNow();
460 $ret = DBA::insert('gserver', $serverdata);
461 $id = DBA::lastInsertId();
463 // Don't override the network with 'unknown' when there had been a valid entry before
464 if (($serverdata['network'] == Protocol::PHANTOM) && !empty($gserver['network'])) {
465 unset($serverdata['network']);
468 $ret = DBA::update('gserver', $serverdata, ['nurl' => $serverdata['nurl']]);
469 $gserver = DBA::selectFirst('gserver', ['id'], ['nurl' => $serverdata['nurl']]);
470 if (DBA::isResult($gserver)) {
471 $id = $gserver['id'];
475 if (!empty($serverdata['network']) && !empty($id) && ($serverdata['network'] != Protocol::PHANTOM)) {
476 $apcontacts = DBA::count('apcontact', ['gsid' => $id]);
477 $contacts = DBA::count('contact', ['uid' => 0, 'gsid' => $id]);
478 $max_users = max($apcontacts, $contacts, $registeredUsers);
479 if ($max_users > $registeredUsers) {
480 Logger::info('Update registered users', ['id' => $id, 'url' => $serverdata['nurl'], 'registered-users' => $max_users]);
481 DBA::update('gserver', ['registered-users' => $max_users], ['id' => $id]);
485 if (!empty($serverdata['network']) && in_array($serverdata['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
486 self::discoverRelay($url);
493 * Fetch relay data from a given server url
495 * @param string $server_url address of the server
496 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
498 private static function discoverRelay(string $server_url)
500 Logger::info('Discover relay data', ['server' => $server_url]);
502 $curlResult = DI::httpRequest()->get($server_url . '/.well-known/x-social-relay');
503 if (!$curlResult->isSuccess()) {
507 $data = json_decode($curlResult->getBody(), true);
508 if (!is_array($data)) {
512 // Sanitize incoming data, see https://github.com/friendica/friendica/issues/8565
513 $data['subscribe'] = (bool)$data['subscribe'] ?? false;
515 if (!$data['subscribe'] || empty($data['scope']) || !in_array(strtolower($data['scope']), ['all', 'tags'])) {
517 $data['subscribe'] = false;
521 $gserver = DBA::selectFirst('gserver', ['id', 'relay-subscribe', 'relay-scope'], ['nurl' => Strings::normaliseLink($server_url)]);
522 if (!DBA::isResult($gserver)) {
526 if (($gserver['relay-subscribe'] != $data['subscribe']) || ($gserver['relay-scope'] != $data['scope'])) {
527 $fields = ['relay-subscribe' => $data['subscribe'], 'relay-scope' => $data['scope']];
528 DBA::update('gserver', $fields, ['id' => $gserver['id']]);
531 DBA::delete('gserver-tag', ['gserver-id' => $gserver['id']]);
533 if ($data['scope'] == 'tags') {
536 foreach ($data['tags'] as $tag) {
537 $tag = mb_strtolower($tag);
538 if (strlen($tag) < 100) {
543 foreach ($tags as $tag) {
544 DBA::insert('gserver-tag', ['gserver-id' => $gserver['id'], 'tag' => $tag], true);
548 // Create or update the relay contact
550 if (isset($data['protocols'])) {
551 if (isset($data['protocols']['diaspora'])) {
552 $fields['network'] = Protocol::DIASPORA;
554 if (isset($data['protocols']['diaspora']['receive'])) {
555 $fields['batch'] = $data['protocols']['diaspora']['receive'];
556 } elseif (is_string($data['protocols']['diaspora'])) {
557 $fields['batch'] = $data['protocols']['diaspora'];
561 if (isset($data['protocols']['dfrn'])) {
562 $fields['network'] = Protocol::DFRN;
564 if (isset($data['protocols']['dfrn']['receive'])) {
565 $fields['batch'] = $data['protocols']['dfrn']['receive'];
566 } elseif (is_string($data['protocols']['dfrn'])) {
567 $fields['batch'] = $data['protocols']['dfrn'];
571 Diaspora::setRelayContact($server_url, $fields);
575 * Fetch server data from '/statistics.json' on the given server
577 * @param string $url URL of the given server
579 * @return array server data
581 private static function fetchStatistics(string $url)
583 $curlResult = DI::httpRequest()->get($url . '/statistics.json');
584 if (!$curlResult->isSuccess()) {
588 $data = json_decode($curlResult->getBody(), true);
593 $serverdata = ['detection-method' => self::DETECT_STATISTICS_JSON];
595 if (!empty($data['version'])) {
596 $serverdata['version'] = $data['version'];
597 // Version numbers on statistics.json are presented with additional info, e.g.:
598 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
599 $serverdata['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $serverdata['version']);
602 if (!empty($data['name'])) {
603 $serverdata['site_name'] = $data['name'];
606 if (!empty($data['network'])) {
607 $serverdata['platform'] = strtolower($data['network']);
609 if ($serverdata['platform'] == 'diaspora') {
610 $serverdata['network'] = Protocol::DIASPORA;
611 } elseif ($serverdata['platform'] == 'friendica') {
612 $serverdata['network'] = Protocol::DFRN;
613 } elseif ($serverdata['platform'] == 'hubzilla') {
614 $serverdata['network'] = Protocol::ZOT;
615 } elseif ($serverdata['platform'] == 'redmatrix') {
616 $serverdata['network'] = Protocol::ZOT;
621 if (!empty($data['registrations_open'])) {
622 $serverdata['register_policy'] = Register::OPEN;
624 $serverdata['register_policy'] = Register::CLOSED;
631 * Detect server type by using the nodeinfo data
633 * @param string $url address of the server
634 * @param CurlResult $curlResult
635 * @return array Server data
636 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
638 private static function fetchNodeinfo(string $url, CurlResult $curlResult)
640 if (!$curlResult->isSuccess()) {
644 $nodeinfo = json_decode($curlResult->getBody(), true);
646 if (!is_array($nodeinfo) || empty($nodeinfo['links'])) {
653 foreach ($nodeinfo['links'] as $link) {
654 if (!is_array($link) || empty($link['rel']) || empty($link['href'])) {
655 Logger::info('Invalid nodeinfo format', ['url' => $url]);
658 if ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
659 $nodeinfo1_url = $link['href'];
660 } elseif ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/2.0') {
661 $nodeinfo2_url = $link['href'];
665 if ($nodeinfo1_url . $nodeinfo2_url == '') {
671 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
672 if (!empty($nodeinfo2_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo2_url, PHP_URL_HOST))) {
673 $server = self::parseNodeinfo2($nodeinfo2_url);
676 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
677 if (empty($server) && !empty($nodeinfo1_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo1_url, PHP_URL_HOST))) {
678 $server = self::parseNodeinfo1($nodeinfo1_url);
687 * @param string $nodeinfo_url address of the nodeinfo path
688 * @return array Server data
689 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
691 private static function parseNodeinfo1(string $nodeinfo_url)
693 $curlResult = DI::httpRequest()->get($nodeinfo_url);
695 if (!$curlResult->isSuccess()) {
699 $nodeinfo = json_decode($curlResult->getBody(), true);
701 if (!is_array($nodeinfo)) {
705 $server = ['detection-method' => self::DETECT_NODEINFO_1,
706 'register_policy' => Register::CLOSED];
708 if (!empty($nodeinfo['openRegistrations'])) {
709 $server['register_policy'] = Register::OPEN;
712 if (is_array($nodeinfo['software'])) {
713 if (!empty($nodeinfo['software']['name'])) {
714 $server['platform'] = strtolower($nodeinfo['software']['name']);
717 if (!empty($nodeinfo['software']['version'])) {
718 $server['version'] = $nodeinfo['software']['version'];
719 // Version numbers on Nodeinfo are presented with additional info, e.g.:
720 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
721 $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']);
725 if (!empty($nodeinfo['metadata']['nodeName'])) {
726 $server['site_name'] = $nodeinfo['metadata']['nodeName'];
729 if (!empty($nodeinfo['usage']['users']['total'])) {
730 $server['registered-users'] = $nodeinfo['usage']['users']['total'];
733 if (!empty($nodeinfo['protocols']['inbound']) && is_array($nodeinfo['protocols']['inbound'])) {
735 foreach ($nodeinfo['protocols']['inbound'] as $protocol) {
736 $protocols[$protocol] = true;
739 if (!empty($protocols['friendica'])) {
740 $server['network'] = Protocol::DFRN;
741 } elseif (!empty($protocols['activitypub'])) {
742 $server['network'] = Protocol::ACTIVITYPUB;
743 } elseif (!empty($protocols['diaspora'])) {
744 $server['network'] = Protocol::DIASPORA;
745 } elseif (!empty($protocols['ostatus'])) {
746 $server['network'] = Protocol::OSTATUS;
747 } elseif (!empty($protocols['gnusocial'])) {
748 $server['network'] = Protocol::OSTATUS;
749 } elseif (!empty($protocols['zot'])) {
750 $server['network'] = Protocol::ZOT;
754 if (empty($server)) {
764 * @param string $nodeinfo_url address of the nodeinfo path
765 * @return array Server data
766 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
768 private static function parseNodeinfo2(string $nodeinfo_url)
770 $curlResult = DI::httpRequest()->get($nodeinfo_url);
771 if (!$curlResult->isSuccess()) {
775 $nodeinfo = json_decode($curlResult->getBody(), true);
777 if (!is_array($nodeinfo)) {
781 $server = ['detection-method' => self::DETECT_NODEINFO_2,
782 'register_policy' => Register::CLOSED];
784 if (!empty($nodeinfo['openRegistrations'])) {
785 $server['register_policy'] = Register::OPEN;
788 if (is_array($nodeinfo['software'])) {
789 if (!empty($nodeinfo['software']['name'])) {
790 $server['platform'] = strtolower($nodeinfo['software']['name']);
793 if (!empty($nodeinfo['software']['version'])) {
794 $server['version'] = $nodeinfo['software']['version'];
795 // Version numbers on Nodeinfo are presented with additional info, e.g.:
796 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
797 $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']);
801 if (!empty($nodeinfo['metadata']['nodeName'])) {
802 $server['site_name'] = $nodeinfo['metadata']['nodeName'];
805 if (!empty($nodeinfo['usage']['users']['total'])) {
806 $server['registered-users'] = $nodeinfo['usage']['users']['total'];
809 if (!empty($nodeinfo['protocols'])) {
811 foreach ($nodeinfo['protocols'] as $protocol) {
812 $protocols[$protocol] = true;
815 if (!empty($protocols['dfrn'])) {
816 $server['network'] = Protocol::DFRN;
817 } elseif (!empty($protocols['activitypub'])) {
818 $server['network'] = Protocol::ACTIVITYPUB;
819 } elseif (!empty($protocols['diaspora'])) {
820 $server['network'] = Protocol::DIASPORA;
821 } elseif (!empty($protocols['ostatus'])) {
822 $server['network'] = Protocol::OSTATUS;
823 } elseif (!empty($protocols['gnusocial'])) {
824 $server['network'] = Protocol::OSTATUS;
825 } elseif (!empty($protocols['zot'])) {
826 $server['network'] = Protocol::ZOT;
830 if (empty($server)) {
838 * Fetch server information from a 'siteinfo.json' file on the given server
840 * @param string $url URL of the given server
841 * @param array $serverdata array with server data
843 * @return array server data
845 private static function fetchSiteinfo(string $url, array $serverdata)
847 $curlResult = DI::httpRequest()->get($url . '/siteinfo.json');
848 if (!$curlResult->isSuccess()) {
852 $data = json_decode($curlResult->getBody(), true);
857 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
858 $serverdata['detection-method'] = self::DETECT_SITEINFO_JSON;
861 if (!empty($data['url'])) {
862 $serverdata['platform'] = strtolower($data['platform']);
863 $serverdata['version'] = $data['version'];
866 if (!empty($data['plugins'])) {
867 if (in_array('pubcrawl', $data['plugins'])) {
868 $serverdata['network'] = Protocol::ACTIVITYPUB;
869 } elseif (in_array('diaspora', $data['plugins'])) {
870 $serverdata['network'] = Protocol::DIASPORA;
871 } elseif (in_array('gnusoc', $data['plugins'])) {
872 $serverdata['network'] = Protocol::OSTATUS;
874 $serverdata['network'] = Protocol::ZOT;
878 if (!empty($data['site_name'])) {
879 $serverdata['site_name'] = $data['site_name'];
882 if (!empty($data['channels_total'])) {
883 $serverdata['registered-users'] = $data['channels_total'];
886 if (!empty($data['register_policy'])) {
887 switch ($data['register_policy']) {
888 case 'REGISTER_OPEN':
889 $serverdata['register_policy'] = Register::OPEN;
892 case 'REGISTER_APPROVE':
893 $serverdata['register_policy'] = Register::APPROVE;
896 case 'REGISTER_CLOSED':
898 $serverdata['register_policy'] = Register::CLOSED;
907 * Checks if the server contains a valid host meta file
909 * @param string $url URL of the given server
911 * @return boolean 'true' if the server seems to be vital
913 private static function validHostMeta(string $url)
915 $xrd_timeout = DI::config()->get('system', 'xrd_timeout');
916 $curlResult = DI::httpRequest()->get($url . '/.well-known/host-meta', false, ['timeout' => $xrd_timeout]);
917 if (!$curlResult->isSuccess()) {
921 $xrd = XML::parseString($curlResult->getBody());
922 if (!is_object($xrd)) {
926 $elements = XML::elementToArray($xrd);
927 if (empty($elements) || empty($elements['xrd']) || empty($elements['xrd']['link'])) {
932 foreach ($elements['xrd']['link'] as $link) {
933 // When there is more than a single "link" element, the array looks slightly different
934 if (!empty($link['@attributes'])) {
935 $link = $link['@attributes'];
938 if (empty($link['rel']) || empty($link['template'])) {
942 if ($link['rel'] == 'lrdd') {
943 // When the webfinger host is the same like the system host, it should be ok.
944 $valid = (parse_url($url, PHP_URL_HOST) == parse_url($link['template'], PHP_URL_HOST));
952 * Detect the network of the given server via their known contacts
954 * @param string $url URL of the given server
955 * @param array $serverdata array with server data
957 * @return array server data
959 private static function detectNetworkViaContacts(string $url, array $serverdata)
963 $apcontacts = DBA::select('apcontact', ['url'], ['baseurl' => [$url, $serverdata['nurl']]]);
964 while ($apcontact = DBA::fetch($apcontacts)) {
965 $contacts[Strings::normaliseLink($apcontact['url'])] = $apcontact['url'];
967 DBA::close($apcontacts);
969 $pcontacts = DBA::select('contact', ['url', 'nurl'], ['uid' => 0, 'baseurl' => [$url, $serverdata['nurl']]]);
970 while ($pcontact = DBA::fetch($pcontacts)) {
971 $contacts[$pcontact['nurl']] = $pcontact['url'];
973 DBA::close($pcontacts);
975 if (empty($contacts)) {
979 foreach ($contacts as $contact) {
980 $probed = Contact::getByURL($contact);
981 if (!empty($probed) && in_array($probed['network'], Protocol::FEDERATED)) {
982 $serverdata['network'] = $probed['network'];
987 $serverdata['registered-users'] = max($serverdata['registered-users'], count($contacts));
993 * Checks if the given server does have a '/poco' endpoint.
994 * This is used for the 'PortableContact' functionality,
995 * which is used by both Friendica and Hubzilla.
997 * @param string $url URL of the given server
998 * @param array $serverdata array with server data
1000 * @return array server data
1002 private static function checkPoCo(string $url, array $serverdata)
1004 $serverdata['poco'] = '';
1006 $curlResult = DI::httpRequest()->get($url . '/poco');
1007 if (!$curlResult->isSuccess()) {
1011 $data = json_decode($curlResult->getBody(), true);
1016 if (!empty($data['totalResults'])) {
1017 $registeredUsers = $serverdata['registered-users'] ?? 0;
1018 $serverdata['registered-users'] = max($data['totalResults'], $registeredUsers);
1019 $serverdata['directory-type'] = self::DT_POCO;
1020 $serverdata['poco'] = $url . '/poco';
1027 * Checks if the given server does have a Mastodon style directory endpoint.
1029 * @param string $url URL of the given server
1030 * @param array $serverdata array with server data
1032 * @return array server data
1034 public static function checkMastodonDirectory(string $url, array $serverdata)
1036 $curlResult = DI::httpRequest()->get($url . '/api/v1/directory?limit=1');
1037 if (!$curlResult->isSuccess()) {
1041 $data = json_decode($curlResult->getBody(), true);
1046 if (count($data) == 1) {
1047 $serverdata['directory-type'] = self::DT_MASTODON;
1054 * Detects the version number of a given server when it was a NextCloud installation
1056 * @param string $url URL of the given server
1057 * @param array $serverdata array with server data
1059 * @return array server data
1061 private static function detectNextcloud(string $url, array $serverdata)
1063 $curlResult = DI::httpRequest()->get($url . '/status.php');
1065 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
1069 $data = json_decode($curlResult->getBody(), true);
1074 if (!empty($data['version'])) {
1075 $serverdata['platform'] = 'nextcloud';
1076 $serverdata['version'] = $data['version'];
1077 $serverdata['network'] = Protocol::ACTIVITYPUB;
1079 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1080 $serverdata['detection-method'] = self::DETECT_STATUS_PHP;
1088 * Detects data from a given server url if it was a mastodon alike system
1090 * @param string $url URL of the given server
1091 * @param array $serverdata array with server data
1093 * @return array server data
1095 private static function detectMastodonAlikes(string $url, array $serverdata)
1097 $curlResult = DI::httpRequest()->get($url . '/api/v1/instance');
1099 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
1103 $data = json_decode($curlResult->getBody(), true);
1108 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1109 $serverdata['detection-method'] = self::DETECT_MASTODON_API;
1112 if (!empty($data['version'])) {
1113 $serverdata['platform'] = 'mastodon';
1114 $serverdata['version'] = $data['version'] ?? '';
1115 $serverdata['network'] = Protocol::ACTIVITYPUB;
1118 if (!empty($data['title'])) {
1119 $serverdata['site_name'] = $data['title'];
1122 if (!empty($data['title']) && empty($serverdata['platform']) && empty($serverdata['network'])) {
1123 $serverdata['platform'] = 'mastodon';
1124 $serverdata['network'] = Protocol::ACTIVITYPUB;
1127 if (!empty($data['description'])) {
1128 $serverdata['info'] = trim($data['description']);
1131 if (!empty($data['stats']['user_count'])) {
1132 $serverdata['registered-users'] = $data['stats']['user_count'];
1135 if (!empty($serverdata['version']) && preg_match('/.*?\(compatible;\s(.*)\s(.*)\)/ism', $serverdata['version'], $matches)) {
1136 $serverdata['platform'] = strtolower($matches[1]);
1137 $serverdata['version'] = $matches[2];
1140 if (!empty($serverdata['version']) && strstr(strtolower($serverdata['version']), 'pleroma')) {
1141 $serverdata['platform'] = 'pleroma';
1142 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version']));
1145 if (!empty($serverdata['platform']) && strstr($serverdata['platform'], 'pleroma')) {
1146 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['platform']));
1147 $serverdata['platform'] = 'pleroma';
1154 * Detects data from typical Hubzilla endpoints
1156 * @param string $url URL of the given server
1157 * @param array $serverdata array with server data
1159 * @return array server data
1161 private static function detectHubzilla(string $url, array $serverdata)
1163 $curlResult = DI::httpRequest()->get($url . '/api/statusnet/config.json');
1164 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
1168 $data = json_decode($curlResult->getBody(), true);
1169 if (empty($data) || empty($data['site'])) {
1173 if (!empty($data['site']['name'])) {
1174 $serverdata['site_name'] = $data['site']['name'];
1177 if (!empty($data['site']['platform'])) {
1178 $serverdata['platform'] = strtolower($data['site']['platform']['PLATFORM_NAME']);
1179 $serverdata['version'] = $data['site']['platform']['STD_VERSION'];
1180 $serverdata['network'] = Protocol::ZOT;
1183 if (!empty($data['site']['hubzilla'])) {
1184 $serverdata['platform'] = strtolower($data['site']['hubzilla']['PLATFORM_NAME']);
1185 $serverdata['version'] = $data['site']['hubzilla']['RED_VERSION'];
1186 $serverdata['network'] = Protocol::ZOT;
1189 if (!empty($data['site']['redmatrix'])) {
1190 if (!empty($data['site']['redmatrix']['PLATFORM_NAME'])) {
1191 $serverdata['platform'] = strtolower($data['site']['redmatrix']['PLATFORM_NAME']);
1192 } elseif (!empty($data['site']['redmatrix']['RED_PLATFORM'])) {
1193 $serverdata['platform'] = strtolower($data['site']['redmatrix']['RED_PLATFORM']);
1196 $serverdata['version'] = $data['site']['redmatrix']['RED_VERSION'];
1197 $serverdata['network'] = Protocol::ZOT;
1201 $inviteonly = false;
1204 if (!empty($data['site']['closed'])) {
1205 $closed = self::toBoolean($data['site']['closed']);
1208 if (!empty($data['site']['private'])) {
1209 $private = self::toBoolean($data['site']['private']);
1212 if (!empty($data['site']['inviteonly'])) {
1213 $inviteonly = self::toBoolean($data['site']['inviteonly']);
1216 if (!$closed && !$private and $inviteonly) {
1217 $serverdata['register_policy'] = Register::APPROVE;
1218 } elseif (!$closed && !$private) {
1219 $serverdata['register_policy'] = Register::OPEN;
1221 $serverdata['register_policy'] = Register::CLOSED;
1224 if (!empty($serverdata['network']) && in_array($serverdata['detection-method'],
1225 [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1226 $serverdata['detection-method'] = self::DETECT_CONFIG_JSON;
1233 * Converts input value to a boolean value
1235 * @param string|integer $val
1239 private static function toBoolean($val)
1241 if (($val == 'true') || ($val == 1)) {
1243 } elseif (($val == 'false') || ($val == 0)) {
1251 * Detect if the URL belongs to a GNU Social server
1253 * @param string $url URL of the given server
1254 * @param array $serverdata array with server data
1256 * @return array server data
1258 private static function detectGNUSocial(string $url, array $serverdata)
1260 // Test for GNU Social
1261 $curlResult = DI::httpRequest()->get($url . '/api/gnusocial/version.json');
1262 if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') &&
1263 ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) {
1264 $serverdata['platform'] = 'gnusocial';
1265 // Remove junk that some GNU Social servers return
1266 $serverdata['version'] = str_replace(chr(239) . chr(187) . chr(191), '', $curlResult->getBody());
1267 $serverdata['version'] = str_replace(["\r", "\n", "\t"], '', $serverdata['version']);
1268 $serverdata['version'] = trim($serverdata['version'], '"');
1269 $serverdata['network'] = Protocol::OSTATUS;
1271 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1272 $serverdata['detection-method'] = self::DETECT_GNUSOCIAL;
1278 // Test for Statusnet
1279 $curlResult = DI::httpRequest()->get($url . '/api/statusnet/version.json');
1280 if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') &&
1281 ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) {
1283 // Remove junk that some GNU Social servers return
1284 $serverdata['version'] = str_replace(chr(239).chr(187).chr(191), '', $curlResult->getBody());
1285 $serverdata['version'] = str_replace(["\r", "\n", "\t"], '', $serverdata['version']);
1286 $serverdata['version'] = trim($serverdata['version'], '"');
1288 if (!empty($serverdata['version']) && strtolower(substr($serverdata['version'], 0, 7)) == 'pleroma') {
1289 $serverdata['platform'] = 'pleroma';
1290 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version']));
1291 $serverdata['network'] = Protocol::ACTIVITYPUB;
1293 $serverdata['platform'] = 'statusnet';
1294 $serverdata['network'] = Protocol::OSTATUS;
1297 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1298 $serverdata['detection-method'] = self::DETECT_STATUSNET;
1306 * Detect if the URL belongs to a Friendica server
1308 * @param string $url URL of the given server
1309 * @param array $serverdata array with server data
1311 * @return array server data
1313 private static function detectFriendica(string $url, array $serverdata)
1315 $curlResult = DI::httpRequest()->get($url . '/friendica/json');
1316 if (!$curlResult->isSuccess()) {
1317 $curlResult = DI::httpRequest()->get($url . '/friendika/json');
1319 $platform = 'Friendika';
1322 $platform = 'Friendica';
1325 if (!$curlResult->isSuccess()) {
1329 $data = json_decode($curlResult->getBody(), true);
1330 if (empty($data) || empty($data['version'])) {
1334 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1335 $serverdata['detection-method'] = $friendika ? self::DETECT_FRIENDIKA : self::DETECT_FRIENDICA;
1338 $serverdata['network'] = Protocol::DFRN;
1339 $serverdata['version'] = $data['version'];
1341 if (!empty($data['no_scrape_url'])) {
1342 $serverdata['noscrape'] = $data['no_scrape_url'];
1345 if (!empty($data['site_name'])) {
1346 $serverdata['site_name'] = $data['site_name'];
1349 if (!empty($data['info'])) {
1350 $serverdata['info'] = trim($data['info']);
1353 $register_policy = ($data['register_policy'] ?? '') ?: 'REGISTER_CLOSED';
1354 switch ($register_policy) {
1355 case 'REGISTER_OPEN':
1356 $serverdata['register_policy'] = Register::OPEN;
1359 case 'REGISTER_APPROVE':
1360 $serverdata['register_policy'] = Register::APPROVE;
1363 case 'REGISTER_CLOSED':
1364 case 'REGISTER_INVITATION':
1365 $serverdata['register_policy'] = Register::CLOSED;
1368 Logger::info('Register policy is invalid', ['policy' => $register_policy, 'server' => $url]);
1369 $serverdata['register_policy'] = Register::CLOSED;
1373 $serverdata['platform'] = strtolower($data['platform'] ?? $platform);
1379 * Analyses the landing page of a given server for hints about type and system of that server
1381 * @param object $curlResult result of curl execution
1382 * @param array $serverdata array with server data
1383 * @param string $url Server URL
1385 * @return array server data
1387 private static function analyseRootBody($curlResult, array $serverdata, string $url)
1389 $doc = new DOMDocument();
1390 @$doc->loadHTML($curlResult->getBody());
1391 $xpath = new DOMXPath($doc);
1393 $title = trim(XML::getFirstNodeValue($xpath, '//head/title/text()'));
1394 if (!empty($title)) {
1395 $serverdata['site_name'] = $title;
1398 $list = $xpath->query('//meta[@name]');
1400 foreach ($list as $node) {
1402 if ($node->attributes->length) {
1403 foreach ($node->attributes as $attribute) {
1404 $value = trim($attribute->value);
1405 if (empty($value)) {
1409 $attr[$attribute->name] = $value;
1412 if (empty($attr['name']) || empty($attr['content'])) {
1417 if ($attr['name'] == 'description') {
1418 $serverdata['info'] = $attr['content'];
1421 if (in_array($attr['name'], ['application-name', 'al:android:app_name', 'al:ios:app_name',
1422 'twitter:app:name:googleplay', 'twitter:app:name:iphone', 'twitter:app:name:ipad'])) {
1423 $serverdata['platform'] = strtolower($attr['content']);
1424 if (in_array($attr['content'], ['Misskey', 'Write.as'])) {
1425 $serverdata['network'] = Protocol::ACTIVITYPUB;
1428 if (($attr['name'] == 'generator') && (empty($serverdata['platform']) || (substr(strtolower($attr['content']), 0, 9) == 'wordpress'))) {
1429 $serverdata['platform'] = strtolower($attr['content']);
1430 $version_part = explode(' ', $attr['content']);
1432 if (count($version_part) == 2) {
1433 if (in_array($version_part[0], ['WordPress'])) {
1434 $serverdata['platform'] = strtolower($version_part[0]);
1435 $serverdata['version'] = $version_part[1];
1437 // We still do need a reliable test if some AP plugin is activated
1438 if (DBA::exists('apcontact', ['baseurl' => $url])) {
1439 $serverdata['network'] = Protocol::ACTIVITYPUB;
1441 $serverdata['network'] = Protocol::FEED;
1444 if ($serverdata['detection-method'] == self::DETECT_MANUAL) {
1445 $serverdata['detection-method'] = self::DETECT_BODY;
1448 if (in_array($version_part[0], ['Friendika', 'Friendica'])) {
1449 $serverdata['platform'] = strtolower($version_part[0]);
1450 $serverdata['version'] = $version_part[1];
1451 $serverdata['network'] = Protocol::DFRN;
1457 $list = $xpath->query('//meta[@property]');
1459 foreach ($list as $node) {
1461 if ($node->attributes->length) {
1462 foreach ($node->attributes as $attribute) {
1463 $value = trim($attribute->value);
1464 if (empty($value)) {
1468 $attr[$attribute->name] = $value;
1471 if (empty($attr['property']) || empty($attr['content'])) {
1476 if ($attr['property'] == 'og:site_name') {
1477 $serverdata['site_name'] = $attr['content'];
1480 if ($attr['property'] == 'og:description') {
1481 $serverdata['info'] = $attr['content'];
1484 if ($attr['property'] == 'og:platform') {
1485 $serverdata['platform'] = strtolower($attr['content']);
1487 if (in_array($attr['content'], ['PeerTube'])) {
1488 $serverdata['network'] = Protocol::ACTIVITYPUB;
1492 if ($attr['property'] == 'generator') {
1493 $serverdata['platform'] = strtolower($attr['content']);
1495 if (in_array($attr['content'], ['hubzilla'])) {
1496 // We later check which compatible protocol modules are loaded.
1497 $serverdata['network'] = Protocol::ZOT;
1502 if (!empty($serverdata['network']) && ($serverdata['detection-method'] == self::DETECT_MANUAL)) {
1503 $serverdata['detection-method'] = self::DETECT_BODY;
1510 * Analyses the header data of a given server for hints about type and system of that server
1512 * @param object $curlResult result of curl execution
1513 * @param array $serverdata array with server data
1515 * @return array server data
1517 private static function analyseRootHeader($curlResult, array $serverdata)
1519 if ($curlResult->getHeader('server') == 'Mastodon') {
1520 $serverdata['platform'] = 'mastodon';
1521 $serverdata['network'] = Protocol::ACTIVITYPUB;
1522 } elseif ($curlResult->inHeader('x-diaspora-version')) {
1523 $serverdata['platform'] = 'diaspora';
1524 $serverdata['network'] = Protocol::DIASPORA;
1525 $serverdata['version'] = $curlResult->getHeader('x-diaspora-version');
1526 } elseif ($curlResult->inHeader('x-friendica-version')) {
1527 $serverdata['platform'] = 'friendica';
1528 $serverdata['network'] = Protocol::DFRN;
1529 $serverdata['version'] = $curlResult->getHeader('x-friendica-version');
1534 if ($serverdata['detection-method'] == self::DETECT_MANUAL) {
1535 $serverdata['detection-method'] = self::DETECT_HEADER;
1542 * Test if the body contains valid content
1544 * @param string $body
1547 private static function invalidBody(string $body)
1549 // Currently we only test for a HTML element.
1550 // Possibly we enhance this in the future.
1551 return !strpos($body, '>');
1555 * Update GServer entries
1557 public static function discover()
1559 // Update the server list
1560 self::discoverFederation();
1564 $requery_days = intval(DI::config()->get('system', 'poco_requery_days'));
1566 if ($requery_days == 0) {
1570 $last_update = date('c', time() - (60 * 60 * 24 * $requery_days));
1572 $gservers = DBA::p("SELECT `id`, `url`, `nurl`, `network`, `poco`, `directory-type`
1575 AND `directory-type` != ?
1576 AND `last_poco_query` < ?
1577 ORDER BY RAND()", self::DT_NONE, $last_update
1580 while ($gserver = DBA::fetch($gservers)) {
1581 if (!GServer::check($gserver['url'], $gserver['network'])) {
1582 // The server is not reachable? Okay, then we will try it later
1583 $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
1584 DBA::update('gserver', $fields, ['nurl' => $gserver['nurl']]);
1588 Logger::info('Update peer list', ['server' => $gserver['url'], 'id' => $gserver['id']]);
1589 Worker::add(PRIORITY_LOW, 'UpdateServerPeers', $gserver['url']);
1591 Logger::info('Update directory', ['server' => $gserver['url'], 'id' => $gserver['id']]);
1592 Worker::add(PRIORITY_LOW, 'UpdateServerDirectory', $gserver);
1594 $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
1595 DBA::update('gserver', $fields, ['nurl' => $gserver['nurl']]);
1597 if (--$no_of_queries == 0) {
1602 DBA::close($gservers);
1606 * Discover federated servers
1608 private static function discoverFederation()
1610 $last = DI::config()->get('poco', 'last_federation_discovery');
1613 $next = $last + (24 * 60 * 60);
1615 if ($next > time()) {
1620 // Discover federated servers
1621 $protocols = ['activitypub', 'diaspora', 'dfrn', 'ostatus'];
1622 foreach ($protocols as $protocol) {
1623 $query = '{nodes(protocol:"' . $protocol . '"){host}}';
1624 $curlResult = DI::httpRequest()->fetch('https://the-federation.info/graphql?query=' . urlencode($query));
1625 if (!empty($curlResult)) {
1626 $data = json_decode($curlResult, true);
1627 if (!empty($data['data']['nodes'])) {
1628 foreach ($data['data']['nodes'] as $server) {
1629 // Using "only_nodeinfo" since servers that are listed on that page should always have it.
1630 Worker::add(PRIORITY_LOW, 'UpdateGServer', 'https://' . $server['host'], true);
1636 // Disvover Mastodon servers
1637 $accesstoken = DI::config()->get('system', 'instances_social_key');
1639 if (!empty($accesstoken)) {
1640 $api = 'https://instances.social/api/1.0/instances/list?count=0';
1641 $header = ['Authorization: Bearer '.$accesstoken];
1642 $curlResult = DI::httpRequest()->get($api, false, ['headers' => $header]);
1644 if ($curlResult->isSuccess()) {
1645 $servers = json_decode($curlResult->getBody(), true);
1647 foreach ($servers['instances'] as $server) {
1648 $url = (is_null($server['https_score']) ? 'http' : 'https') . '://' . $server['name'];
1649 Worker::add(PRIORITY_LOW, 'UpdateGServer', $url);
1654 DI::config()->set('poco', 'last_federation_discovery', time());