3 * @copyright Copyright (C) 2010-2022, the Friendica project
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;
27 use Friendica\Core\Logger;
28 use Friendica\Core\Protocol;
29 use Friendica\Core\System;
30 use Friendica\Core\Worker;
31 use Friendica\Database\Database;
32 use Friendica\Database\DBA;
34 use Friendica\Module\Register;
35 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
36 use Friendica\Network\HTTPClient\Capability\ICanHandleHttpResponses;
37 use Friendica\Protocol\Relay;
38 use Friendica\Util\DateTimeFormat;
39 use Friendica\Util\Network;
40 use Friendica\Util\Strings;
41 use Friendica\Util\XML;
44 * This class handles GServer related functions
51 const DT_MASTODON = 2;
53 // Methods to detect server types
55 // Non endpoint specific methods
56 const DETECT_MANUAL = 0;
57 const DETECT_HEADER = 1;
58 const DETECT_BODY = 2;
60 // Implementation specific endpoints
61 const DETECT_FRIENDIKA = 10;
62 const DETECT_FRIENDICA = 11;
63 const DETECT_STATUSNET = 12;
64 const DETECT_GNUSOCIAL = 13;
65 const DETECT_CONFIG_JSON = 14; // Statusnet, GNU Social, Older Hubzilla/Redmatrix
66 const DETECT_SITEINFO_JSON = 15; // Newer Hubzilla
67 const DETECT_MASTODON_API = 16;
68 const DETECT_STATUS_PHP = 17; // Nextcloud
69 const DETECT_V1_CONFIG = 18;
70 const DETECT_PUMPIO = 19;
72 // Standardized endpoints
73 const DETECT_STATISTICS_JSON = 100;
74 const DETECT_NODEINFO_1 = 101;
75 const DETECT_NODEINFO_2 = 102;
78 * Check for the existance of a server and adds it in the background if not existant
81 * @param boolean $only_nodeinfo
84 public static function add(string $url, bool $only_nodeinfo = false)
86 if (self::getID($url, false)) {
90 Worker::add(PRIORITY_LOW, 'UpdateGServer', $url, $only_nodeinfo);
94 * Get the ID for the given server URL
97 * @param boolean $no_check Don't check if the server hadn't been found
98 * @return int gserver id
100 public static function getID(string $url, bool $no_check = false)
106 $url = self::cleanURL($url);
108 $gserver = DBA::selectFirst('gserver', ['id'], ['nurl' => Strings::normaliseLink($url)]);
109 if (DBA::isResult($gserver)) {
110 Logger::info('Got ID for URL', ['id' => $gserver['id'], 'url' => $url, 'callstack' => System::callstack(20)]);
111 return $gserver['id'];
114 if ($no_check || !self::check($url)) {
118 return self::getID($url, true);
122 * Retrieves all the servers which base domain are matching the provided domain pattern
124 * The pattern is a simple fnmatch() pattern with ? for single wildcard and * for multiple wildcard
126 * @param string $pattern
130 public static function listByDomainPattern(string $pattern): array
132 $likePattern = 'http://' . strtr($pattern, ['_' => '\_', '%' => '\%', '?' => '_', '*' => '%']);
134 // The SUBSTRING_INDEX returns everything before the eventual third /, which effectively trims an
135 // eventual server path and keep only the server domain which we're matching against the pattern.
136 $sql = "SELECT `gserver`.*, COUNT(*) AS `contacts`
138 LEFT JOIN `contact` ON `gserver`.`id` = `contact`.`gsid`
139 WHERE SUBSTRING_INDEX(`gserver`.`nurl`, '/', 3) LIKE ?
140 AND NOT `gserver`.`failed`
141 GROUP BY `gserver`.`id`";
143 $stmt = DI::dba()->p($sql, $likePattern);
145 return DI::dba()->toArray($stmt);
149 * Checks if the given server is reachable
151 * @param string $profile URL of the given profile
152 * @param string $server URL of the given server (If empty, taken from profile)
153 * @param string $network Network value that is used, when detection failed
154 * @param boolean $force Force an update.
156 * @return boolean 'true' if server seems vital
158 public static function reachable(string $profile, string $server = '', string $network = '', bool $force = false)
161 $contact = Contact::getByURL($profile, null, ['baseurl']);
162 if (!empty($contact['baseurl'])) {
163 $server = $contact['baseurl'];
171 return self::check($server, $network, $force);
174 public static function getNextUpdateDate(bool $success, string $created = '', string $last_contact = '')
176 // On successful contact process check again next week
178 return DateTimeFormat::utc('now +7 day');
181 $now = strtotime(DateTimeFormat::utcNow());
183 if ($created > $last_contact) {
184 $contact_time = strtotime($created);
186 $contact_time = strtotime($last_contact);
189 // If the last contact was less than 6 hours before then try again in 6 hours
190 if (($now - $contact_time) < (60 * 60 * 6)) {
191 return DateTimeFormat::utc('now +6 hour');
194 // If the last contact was less than 12 hours before then try again in 12 hours
195 if (($now - $contact_time) < (60 * 60 * 12)) {
196 return DateTimeFormat::utc('now +12 hour');
199 // If the last contact was less than 24 hours before then try tomorrow again
200 if (($now - $contact_time) < (60 * 60 * 24)) {
201 return DateTimeFormat::utc('now +1 day');
204 // If the last contact was less than a week before then try again in a week
205 if (($now - $contact_time) < (60 * 60 * 24 * 7)) {
206 return DateTimeFormat::utc('now +1 week');
209 // If the last contact was less than two weeks before then try again in two week
210 if (($now - $contact_time) < (60 * 60 * 24 * 14)) {
211 return DateTimeFormat::utc('now +2 week');
214 // If the last contact was less than a month before then try again in a month
215 if (($now - $contact_time) < (60 * 60 * 24 * 30)) {
216 return DateTimeFormat::utc('now +1 month');
219 // The system hadn't been successul contacted for more than a month, so try again in three months
220 return DateTimeFormat::utc('now +3 month');
224 * Checks the state of the given server.
226 * @param string $server_url URL of the given server
227 * @param string $network Network value that is used, when detection failed
228 * @param boolean $force Force an update.
229 * @param boolean $only_nodeinfo Only use nodeinfo for server detection
231 * @return boolean 'true' if server seems vital
233 public static function check(string $server_url, string $network = '', bool $force = false, bool $only_nodeinfo = false)
235 $server_url = self::cleanURL($server_url);
236 if ($server_url == '') {
240 $gserver = DBA::selectFirst('gserver', [], ['nurl' => Strings::normaliseLink($server_url)]);
241 if (DBA::isResult($gserver)) {
242 if ($gserver['created'] <= DBA::NULL_DATETIME) {
243 $fields = ['created' => DateTimeFormat::utcNow()];
244 $condition = ['nurl' => Strings::normaliseLink($server_url)];
245 DBA::update('gserver', $fields, $condition);
248 if (!$force && (strtotime($gserver['next_contact']) > time())) {
249 Logger::info('No update needed', ['server' => $server_url]);
250 return (!$gserver['failed']);
252 Logger::info('Server is outdated. Start discovery.', ['Server' => $server_url, 'Force' => $force]);
254 Logger::info('Server is unknown. Start discovery.', ['Server' => $server_url]);
257 return self::detect($server_url, $network, $only_nodeinfo);
261 * Set failed server status
265 public static function setFailure(string $url)
267 $gserver = DBA::selectFirst('gserver', [], ['nurl' => Strings::normaliseLink($url)]);
268 if (DBA::isResult($gserver)) {
269 $next_update = self::getNextUpdateDate(false, $gserver['created'], $gserver['last_contact']);
270 DBA::update('gserver', ['failed' => true, 'last_failure' => DateTimeFormat::utcNow(),
271 'next_contact' => $next_update, 'detection-method' => null],
272 ['nurl' => Strings::normaliseLink($url)]);
273 Logger::info('Set failed status for existing server', ['url' => $url]);
276 DBA::insert('gserver', ['url' => $url, 'nurl' => Strings::normaliseLink($url),
277 'network' => Protocol::PHANTOM, 'created' => DateTimeFormat::utcNow(),
278 'failed' => true, 'last_failure' => DateTimeFormat::utcNow()]);
279 Logger::info('Set failed status for new server', ['url' => $url]);
283 * Remove unwanted content from the given URL
286 * @return string cleaned URL
288 public static function cleanURL(string $url)
290 $url = trim($url, '/');
291 $url = str_replace('/index.php', '', $url);
293 $urlparts = parse_url($url);
294 unset($urlparts['user']);
295 unset($urlparts['pass']);
296 unset($urlparts['query']);
297 unset($urlparts['fragment']);
298 return Network::unparseURL($urlparts);
302 * Return the base URL
305 * @return string base URL
307 private static function getBaseURL(string $url)
309 $urlparts = parse_url(self::cleanURL($url));
310 unset($urlparts['path']);
311 return Network::unparseURL($urlparts);
315 * Detect server data (type, protocol, version number, ...)
316 * The detected data is then updated or inserted in the gserver table.
318 * @param string $url URL of the given server
319 * @param string $network Network value that is used, when detection failed
320 * @param boolean $only_nodeinfo Only use nodeinfo for server detection
322 * @return boolean 'true' if server could be detected
324 public static function detect(string $url, string $network = '', bool $only_nodeinfo = false)
326 Logger::info('Detect server type', ['server' => $url]);
327 $serverdata = ['detection-method' => self::DETECT_MANUAL];
329 $original_url = $url;
331 // Remove URL content that is not supposed to exist for a server url
332 $url = self::cleanURL($url);
335 $baseurl = self::getBaseURL($url);
337 // If the URL missmatches, then we mark the old entry as failure
338 if ($url != $original_url) {
339 /// @todo What to do with "next_contact" here?
340 DBA::update('gserver', ['failed' => true, 'last_failure' => DateTimeFormat::utcNow()],
341 ['nurl' => Strings::normaliseLink($original_url)]);
344 // When a nodeinfo is present, we don't need to dig further
345 $xrd_timeout = DI::config()->get('system', 'xrd_timeout');
346 $curlResult = DI::httpClient()->get($url . '/.well-known/nodeinfo', [HttpClientOptions::TIMEOUT => $xrd_timeout]);
347 if ($curlResult->isTimeout()) {
348 self::setFailure($url);
352 // On a redirect follow the new host but mark the old one as failure
353 if ($curlResult->isSuccess() && !empty($curlResult->getRedirectUrl()) && (parse_url($url, PHP_URL_HOST) != parse_url($curlResult->getRedirectUrl(), PHP_URL_HOST))) {
354 $curlResult = DI::httpClient()->get($url, [HttpClientOptions::TIMEOUT => $xrd_timeout]);
355 if (!empty($curlResult->getRedirectUrl()) && parse_url($url, PHP_URL_HOST) != parse_url($curlResult->getRedirectUrl(), PHP_URL_HOST)) {
356 Logger::info('Found redirect. Mark old entry as failure', ['old' => $url, 'new' => $curlResult->getRedirectUrl()]);
357 self::setFailure($url);
358 self::detect($curlResult->getRedirectUrl(), $network, $only_nodeinfo);
363 $nodeinfo = self::fetchNodeinfo($url, $curlResult);
364 if ($only_nodeinfo && empty($nodeinfo)) {
365 Logger::info('Invalid nodeinfo in nodeinfo-mode, server is marked as failure', ['url' => $url]);
366 self::setFailure($url);
370 // When nodeinfo isn't present, we use the older 'statistics.json' endpoint
371 if (empty($nodeinfo)) {
372 $nodeinfo = self::fetchStatistics($url);
375 // If that didn't work out well, we use some protocol specific endpoints
376 // For Friendica and Zot based networks we have to dive deeper to reveal more details
377 if (empty($nodeinfo['network']) || in_array($nodeinfo['network'], [Protocol::DFRN, Protocol::ZOT])) {
378 if (!empty($nodeinfo['detection-method'])) {
379 $serverdata['detection-method'] = $nodeinfo['detection-method'];
382 // Fetch the landing page, possibly it reveals some data
383 if (empty($nodeinfo['network'])) {
384 if ($baseurl == $url) {
385 $basedata = $serverdata;
387 $basedata = ['detection-method' => self::DETECT_MANUAL];
390 $curlResult = DI::httpClient()->get($baseurl, [HttpClientOptions::TIMEOUT => $xrd_timeout]);
391 if ($curlResult->isSuccess()) {
392 if (!empty($curlResult->getRedirectUrl()) && (parse_url($baseurl, PHP_URL_HOST) != parse_url($curlResult->getRedirectUrl(), PHP_URL_HOST))) {
393 Logger::info('Found redirect. Mark old entry as failure', ['old' => $url, 'new' => $curlResult->getRedirectUrl()]);
394 self::setFailure($url);
395 self::detect($curlResult->getRedirectUrl(), $network, $only_nodeinfo);
399 $basedata = self::analyseRootHeader($curlResult, $basedata);
400 $basedata = self::analyseRootBody($curlResult, $basedata, $baseurl);
403 if (!$curlResult->isSuccess() || empty($curlResult->getBody()) || self::invalidBody($curlResult->getBody())) {
404 self::setFailure($url);
408 if ($baseurl == $url) {
409 $serverdata = $basedata;
411 // When the base path doesn't seem to contain a social network we try the complete path.
412 // Most detectable system have to be installed in the root directory.
413 // We checked the base to avoid false positives.
414 $curlResult = DI::httpClient()->get($url, [HttpClientOptions::TIMEOUT => $xrd_timeout]);
415 if ($curlResult->isSuccess()) {
416 $urldata = self::analyseRootHeader($curlResult, $serverdata);
417 $urldata = self::analyseRootBody($curlResult, $urldata, $url);
419 $comparebase = $basedata;
420 unset($comparebase['info']);
421 unset($comparebase['site_name']);
422 $compareurl = $urldata;
423 unset($compareurl['info']);
424 unset($compareurl['site_name']);
426 // We assume that no one will install the identical system in the root and a subfolder
427 if (!empty(array_diff($comparebase, $compareurl))) {
428 $serverdata = $urldata;
434 if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ACTIVITYPUB)) {
435 $serverdata = self::detectMastodonAlikes($url, $serverdata);
438 // All following checks are done for systems that always have got a "host-meta" endpoint.
439 // With this check we don't have to waste time and ressources for dead systems.
440 // Also this hopefully prevents us from receiving abuse messages.
441 if (empty($serverdata['network']) && !self::validHostMeta($url)) {
442 self::setFailure($url);
446 if (empty($serverdata['network']) || in_array($serverdata['network'], [Protocol::DFRN, Protocol::ACTIVITYPUB])) {
447 $serverdata = self::detectFriendica($url, $serverdata);
450 // the 'siteinfo.json' is some specific endpoint of Hubzilla and Red
451 if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ZOT)) {
452 $serverdata = self::fetchSiteinfo($url, $serverdata);
455 // The 'siteinfo.json' doesn't seem to be present on older Hubzilla installations
456 if (empty($serverdata['network'])) {
457 $serverdata = self::detectHubzilla($url, $serverdata);
460 if (empty($serverdata['network']) || in_array($serverdata['detection-method'], [self::DETECT_MANUAL, self::DETECT_BODY])) {
461 $serverdata = self::detectPeertube($url, $serverdata);
464 if (empty($serverdata['network'])) {
465 $serverdata = self::detectNextcloud($url, $serverdata);
468 if (empty($serverdata['network'])) {
469 $serverdata = self::detectGNUSocial($url, $serverdata);
472 if (empty($serverdata['network'])) {
473 $serverdata = self::detectPumpIO($url, $serverdata);
476 $serverdata = array_merge($nodeinfo, $serverdata);
478 $serverdata = $nodeinfo;
481 // Detect the directory type
482 $serverdata['directory-type'] = self::DT_NONE;
483 $serverdata = self::checkPoCo($url, $serverdata);
484 $serverdata = self::checkMastodonDirectory($url, $serverdata);
486 // We can't detect the network type. Possibly it is some system that we don't know yet
487 if (empty($serverdata['network'])) {
488 $serverdata['network'] = Protocol::PHANTOM;
491 // When we hadn't been able to detect the network type, we use the hint from the parameter
492 if (($serverdata['network'] == Protocol::PHANTOM) && !empty($network)) {
493 $serverdata['network'] = $network;
496 $serverdata['url'] = $url;
497 $serverdata['nurl'] = Strings::normaliseLink($url);
499 // We take the highest number that we do find
500 $registeredUsers = $serverdata['registered-users'] ?? 0;
502 // On an active server there has to be at least a single user
503 if (($serverdata['network'] != Protocol::PHANTOM) && ($registeredUsers == 0)) {
504 $registeredUsers = 1;
507 if ($serverdata['network'] == Protocol::PHANTOM) {
508 $serverdata['registered-users'] = max($registeredUsers, 1);
509 $serverdata = self::detectNetworkViaContacts($url, $serverdata);
512 $serverdata['next_contact'] = self::getNextUpdateDate(true);
514 $serverdata['last_contact'] = DateTimeFormat::utcNow();
515 $serverdata['failed'] = false;
517 $gserver = DBA::selectFirst('gserver', ['network'], ['nurl' => Strings::normaliseLink($url)]);
518 if (!DBA::isResult($gserver)) {
519 $serverdata['created'] = DateTimeFormat::utcNow();
520 $ret = DBA::insert('gserver', $serverdata);
521 $id = DBA::lastInsertId();
523 // Don't override the network with 'unknown' when there had been a valid entry before
524 if (($serverdata['network'] == Protocol::PHANTOM) && !empty($gserver['network'])) {
525 unset($serverdata['network']);
528 $ret = DBA::update('gserver', $serverdata, ['nurl' => $serverdata['nurl']]);
529 $gserver = DBA::selectFirst('gserver', ['id'], ['nurl' => $serverdata['nurl']]);
530 if (DBA::isResult($gserver)) {
531 $id = $gserver['id'];
535 if (!empty($serverdata['network']) && !empty($id) && ($serverdata['network'] != Protocol::PHANTOM)) {
536 $apcontacts = DBA::count('apcontact', ['gsid' => $id]);
537 $contacts = DBA::count('contact', ['uid' => 0, 'gsid' => $id]);
538 $max_users = max($apcontacts, $contacts, $registeredUsers, 1);
539 if ($max_users > $registeredUsers) {
540 Logger::info('Update registered users', ['id' => $id, 'url' => $serverdata['nurl'], 'registered-users' => $max_users]);
541 DBA::update('gserver', ['registered-users' => $max_users], ['id' => $id]);
545 if (!empty($serverdata['network']) && in_array($serverdata['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
546 self::discoverRelay($url);
553 * Fetch relay data from a given server url
555 * @param string $server_url address of the server
556 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
558 private static function discoverRelay(string $server_url)
560 Logger::info('Discover relay data', ['server' => $server_url]);
562 $curlResult = DI::httpClient()->get($server_url . '/.well-known/x-social-relay');
563 if (!$curlResult->isSuccess()) {
567 $data = json_decode($curlResult->getBody(), true);
568 if (!is_array($data)) {
572 // Sanitize incoming data, see https://github.com/friendica/friendica/issues/8565
573 $data['subscribe'] = (bool)$data['subscribe'] ?? false;
575 if (!$data['subscribe'] || empty($data['scope']) || !in_array(strtolower($data['scope']), ['all', 'tags'])) {
577 $data['subscribe'] = false;
581 $gserver = DBA::selectFirst('gserver', ['id', 'url', 'network', 'relay-subscribe', 'relay-scope'], ['nurl' => Strings::normaliseLink($server_url)]);
582 if (!DBA::isResult($gserver)) {
586 if (($gserver['relay-subscribe'] != $data['subscribe']) || ($gserver['relay-scope'] != $data['scope'])) {
587 $fields = ['relay-subscribe' => $data['subscribe'], 'relay-scope' => $data['scope']];
588 DBA::update('gserver', $fields, ['id' => $gserver['id']]);
591 DBA::delete('gserver-tag', ['gserver-id' => $gserver['id']]);
593 if ($data['scope'] == 'tags') {
596 foreach ($data['tags'] as $tag) {
597 $tag = mb_strtolower($tag);
598 if (strlen($tag) < 100) {
603 foreach ($tags as $tag) {
604 DBA::insert('gserver-tag', ['gserver-id' => $gserver['id'], 'tag' => $tag], Database::INSERT_IGNORE);
608 // Create or update the relay contact
610 if (isset($data['protocols'])) {
611 if (isset($data['protocols']['diaspora'])) {
612 $fields['network'] = Protocol::DIASPORA;
614 if (isset($data['protocols']['diaspora']['receive'])) {
615 $fields['batch'] = $data['protocols']['diaspora']['receive'];
616 } elseif (is_string($data['protocols']['diaspora'])) {
617 $fields['batch'] = $data['protocols']['diaspora'];
621 if (isset($data['protocols']['dfrn'])) {
622 $fields['network'] = Protocol::DFRN;
624 if (isset($data['protocols']['dfrn']['receive'])) {
625 $fields['batch'] = $data['protocols']['dfrn']['receive'];
626 } elseif (is_string($data['protocols']['dfrn'])) {
627 $fields['batch'] = $data['protocols']['dfrn'];
631 if (isset($data['protocols']['activitypub'])) {
632 $fields['network'] = Protocol::ACTIVITYPUB;
634 if (!empty($data['protocols']['activitypub']['actor'])) {
635 $fields['url'] = $data['protocols']['activitypub']['actor'];
637 if (!empty($data['protocols']['activitypub']['receive'])) {
638 $fields['batch'] = $data['protocols']['activitypub']['receive'];
643 Logger::info('Discovery ended', ['server' => $server_url, 'data' => $fields]);
645 Relay::updateContact($gserver, $fields);
649 * Fetch server data from '/statistics.json' on the given server
651 * @param string $url URL of the given server
653 * @return array server data
655 private static function fetchStatistics(string $url)
657 $curlResult = DI::httpClient()->get($url . '/statistics.json');
658 if (!$curlResult->isSuccess()) {
662 $data = json_decode($curlResult->getBody(), true);
667 $serverdata = ['detection-method' => self::DETECT_STATISTICS_JSON];
669 if (!empty($data['version'])) {
670 $serverdata['version'] = $data['version'];
671 // Version numbers on statistics.json are presented with additional info, e.g.:
672 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
673 $serverdata['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $serverdata['version']);
676 if (!empty($data['name'])) {
677 $serverdata['site_name'] = $data['name'];
680 if (!empty($data['network'])) {
681 $serverdata['platform'] = strtolower($data['network']);
683 if ($serverdata['platform'] == 'diaspora') {
684 $serverdata['network'] = Protocol::DIASPORA;
685 } elseif ($serverdata['platform'] == 'friendica') {
686 $serverdata['network'] = Protocol::DFRN;
687 } elseif ($serverdata['platform'] == 'hubzilla') {
688 $serverdata['network'] = Protocol::ZOT;
689 } elseif ($serverdata['platform'] == 'redmatrix') {
690 $serverdata['network'] = Protocol::ZOT;
695 if (!empty($data['registrations_open'])) {
696 $serverdata['register_policy'] = Register::OPEN;
698 $serverdata['register_policy'] = Register::CLOSED;
705 * Detect server type by using the nodeinfo data
707 * @param string $url address of the server
708 * @param ICanHandleHttpResponses $httpResult
710 * @return array Server data
711 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
713 private static function fetchNodeinfo(string $url, ICanHandleHttpResponses $httpResult)
715 if (!$httpResult->isSuccess()) {
719 $nodeinfo = json_decode($httpResult->getBody(), true);
721 if (!is_array($nodeinfo) || empty($nodeinfo['links'])) {
728 foreach ($nodeinfo['links'] as $link) {
729 if (!is_array($link) || empty($link['rel']) || empty($link['href'])) {
730 Logger::info('Invalid nodeinfo format', ['url' => $url]);
733 if ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
734 $nodeinfo1_url = $link['href'];
735 } elseif ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/2.0') {
736 $nodeinfo2_url = $link['href'];
740 if ($nodeinfo1_url . $nodeinfo2_url == '') {
746 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
747 if (!empty($nodeinfo2_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo2_url, PHP_URL_HOST))) {
748 $server = self::parseNodeinfo2($nodeinfo2_url);
751 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
752 if (empty($server) && !empty($nodeinfo1_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo1_url, PHP_URL_HOST))) {
753 $server = self::parseNodeinfo1($nodeinfo1_url);
762 * @param string $nodeinfo_url address of the nodeinfo path
763 * @return array Server data
764 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
766 private static function parseNodeinfo1(string $nodeinfo_url)
768 $curlResult = DI::httpClient()->get($nodeinfo_url);
770 if (!$curlResult->isSuccess()) {
774 $nodeinfo = json_decode($curlResult->getBody(), true);
776 if (!is_array($nodeinfo)) {
780 $server = ['detection-method' => self::DETECT_NODEINFO_1,
781 'register_policy' => Register::CLOSED];
783 if (!empty($nodeinfo['openRegistrations'])) {
784 $server['register_policy'] = Register::OPEN;
787 if (is_array($nodeinfo['software'])) {
788 if (!empty($nodeinfo['software']['name'])) {
789 $server['platform'] = strtolower($nodeinfo['software']['name']);
792 if (!empty($nodeinfo['software']['version'])) {
793 $server['version'] = $nodeinfo['software']['version'];
794 // Version numbers on Nodeinfo are presented with additional info, e.g.:
795 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
796 $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']);
800 if (!empty($nodeinfo['metadata']['nodeName'])) {
801 $server['site_name'] = $nodeinfo['metadata']['nodeName'];
804 if (!empty($nodeinfo['usage']['users']['total'])) {
805 $server['registered-users'] = max($nodeinfo['usage']['users']['total'], 1);
808 if (!empty($nodeinfo['protocols']['inbound']) && is_array($nodeinfo['protocols']['inbound'])) {
810 foreach ($nodeinfo['protocols']['inbound'] as $protocol) {
811 $protocols[$protocol] = true;
814 if (!empty($protocols['friendica'])) {
815 $server['network'] = Protocol::DFRN;
816 } elseif (!empty($protocols['activitypub'])) {
817 $server['network'] = Protocol::ACTIVITYPUB;
818 } elseif (!empty($protocols['diaspora'])) {
819 $server['network'] = Protocol::DIASPORA;
820 } elseif (!empty($protocols['ostatus'])) {
821 $server['network'] = Protocol::OSTATUS;
822 } elseif (!empty($protocols['gnusocial'])) {
823 $server['network'] = Protocol::OSTATUS;
824 } elseif (!empty($protocols['zot'])) {
825 $server['network'] = Protocol::ZOT;
829 if (empty($server)) {
839 * @see https://git.feneas.org/jaywink/nodeinfo2
840 * @param string $nodeinfo_url address of the nodeinfo path
841 * @return array Server data
842 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
844 private static function parseNodeinfo2(string $nodeinfo_url)
846 $curlResult = DI::httpClient()->get($nodeinfo_url);
847 if (!$curlResult->isSuccess()) {
851 $nodeinfo = json_decode($curlResult->getBody(), true);
853 if (!is_array($nodeinfo)) {
857 $server = ['detection-method' => self::DETECT_NODEINFO_2,
858 'register_policy' => Register::CLOSED];
860 if (!empty($nodeinfo['openRegistrations'])) {
861 $server['register_policy'] = Register::OPEN;
864 if (is_array($nodeinfo['software'])) {
865 if (!empty($nodeinfo['software']['name'])) {
866 $server['platform'] = strtolower($nodeinfo['software']['name']);
869 if (!empty($nodeinfo['software']['version'])) {
870 $server['version'] = $nodeinfo['software']['version'];
871 // Version numbers on Nodeinfo are presented with additional info, e.g.:
872 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
873 $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']);
877 if (!empty($nodeinfo['metadata']['nodeName'])) {
878 $server['site_name'] = $nodeinfo['metadata']['nodeName'];
881 if (!empty($nodeinfo['usage']['users']['total'])) {
882 $server['registered-users'] = max($nodeinfo['usage']['users']['total'], 1);
885 if (!empty($nodeinfo['protocols'])) {
887 foreach ($nodeinfo['protocols'] as $protocol) {
888 if (is_string($protocol)) {
889 $protocols[$protocol] = true;
893 if (!empty($protocols['dfrn'])) {
894 $server['network'] = Protocol::DFRN;
895 } elseif (!empty($protocols['activitypub'])) {
896 $server['network'] = Protocol::ACTIVITYPUB;
897 } elseif (!empty($protocols['diaspora'])) {
898 $server['network'] = Protocol::DIASPORA;
899 } elseif (!empty($protocols['ostatus'])) {
900 $server['network'] = Protocol::OSTATUS;
901 } elseif (!empty($protocols['gnusocial'])) {
902 $server['network'] = Protocol::OSTATUS;
903 } elseif (!empty($protocols['zot'])) {
904 $server['network'] = Protocol::ZOT;
908 if (empty($server)) {
916 * Fetch server information from a 'siteinfo.json' file on the given server
918 * @param string $url URL of the given server
919 * @param array $serverdata array with server data
921 * @return array server data
923 private static function fetchSiteinfo(string $url, array $serverdata)
925 $curlResult = DI::httpClient()->get($url . '/siteinfo.json');
926 if (!$curlResult->isSuccess()) {
930 $data = json_decode($curlResult->getBody(), true);
935 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
936 $serverdata['detection-method'] = self::DETECT_SITEINFO_JSON;
939 if (!empty($data['url'])) {
940 $serverdata['platform'] = strtolower($data['platform']);
941 $serverdata['version'] = $data['version'];
944 if (!empty($data['plugins'])) {
945 if (in_array('pubcrawl', $data['plugins'])) {
946 $serverdata['network'] = Protocol::ACTIVITYPUB;
947 } elseif (in_array('diaspora', $data['plugins'])) {
948 $serverdata['network'] = Protocol::DIASPORA;
949 } elseif (in_array('gnusoc', $data['plugins'])) {
950 $serverdata['network'] = Protocol::OSTATUS;
952 $serverdata['network'] = Protocol::ZOT;
956 if (!empty($data['site_name'])) {
957 $serverdata['site_name'] = $data['site_name'];
960 if (!empty($data['channels_total'])) {
961 $serverdata['registered-users'] = max($data['channels_total'], 1);
964 if (!empty($data['register_policy'])) {
965 switch ($data['register_policy']) {
966 case 'REGISTER_OPEN':
967 $serverdata['register_policy'] = Register::OPEN;
970 case 'REGISTER_APPROVE':
971 $serverdata['register_policy'] = Register::APPROVE;
974 case 'REGISTER_CLOSED':
976 $serverdata['register_policy'] = Register::CLOSED;
985 * Checks if the server contains a valid host meta file
987 * @param string $url URL of the given server
989 * @return boolean 'true' if the server seems to be vital
991 private static function validHostMeta(string $url)
993 $xrd_timeout = DI::config()->get('system', 'xrd_timeout');
994 $curlResult = DI::httpClient()->get($url . '/.well-known/host-meta', [HttpClientOptions::TIMEOUT => $xrd_timeout]);
995 if (!$curlResult->isSuccess()) {
999 $xrd = XML::parseString($curlResult->getBody());
1000 if (!is_object($xrd)) {
1004 $elements = XML::elementToArray($xrd);
1005 if (empty($elements) || empty($elements['xrd']) || empty($elements['xrd']['link'])) {
1010 foreach ($elements['xrd']['link'] as $link) {
1011 // When there is more than a single "link" element, the array looks slightly different
1012 if (!empty($link['@attributes'])) {
1013 $link = $link['@attributes'];
1016 if (empty($link['rel']) || empty($link['template'])) {
1020 if ($link['rel'] == 'lrdd') {
1021 // When the webfinger host is the same like the system host, it should be ok.
1022 $valid = (parse_url($url, PHP_URL_HOST) == parse_url($link['template'], PHP_URL_HOST));
1030 * Detect the network of the given server via their known contacts
1032 * @param string $url URL of the given server
1033 * @param array $serverdata array with server data
1035 * @return array server data
1037 private static function detectNetworkViaContacts(string $url, array $serverdata)
1041 $apcontacts = DBA::select('apcontact', ['url'], ['baseurl' => [$url, $serverdata['nurl']]]);
1042 while ($apcontact = DBA::fetch($apcontacts)) {
1043 $contacts[Strings::normaliseLink($apcontact['url'])] = $apcontact['url'];
1045 DBA::close($apcontacts);
1047 $pcontacts = DBA::select('contact', ['url', 'nurl'], ['uid' => 0, 'baseurl' => [$url, $serverdata['nurl']]]);
1048 while ($pcontact = DBA::fetch($pcontacts)) {
1049 $contacts[$pcontact['nurl']] = $pcontact['url'];
1051 DBA::close($pcontacts);
1053 if (empty($contacts)) {
1057 foreach ($contacts as $contact) {
1058 $probed = Contact::getByURL($contact);
1059 if (!empty($probed) && in_array($probed['network'], Protocol::FEDERATED)) {
1060 $serverdata['network'] = $probed['network'];
1065 $serverdata['registered-users'] = max($serverdata['registered-users'], count($contacts), 1);
1071 * Checks if the given server does have a '/poco' endpoint.
1072 * This is used for the 'PortableContact' functionality,
1073 * which is used by both Friendica and Hubzilla.
1075 * @param string $url URL of the given server
1076 * @param array $serverdata array with server data
1078 * @return array server data
1080 private static function checkPoCo(string $url, array $serverdata)
1082 $serverdata['poco'] = '';
1084 $curlResult = DI::httpClient()->get($url . '/poco');
1085 if (!$curlResult->isSuccess()) {
1089 $data = json_decode($curlResult->getBody(), true);
1094 if (!empty($data['totalResults'])) {
1095 $registeredUsers = $serverdata['registered-users'] ?? 0;
1096 $serverdata['registered-users'] = max($data['totalResults'], $registeredUsers, 1);
1097 $serverdata['directory-type'] = self::DT_POCO;
1098 $serverdata['poco'] = $url . '/poco';
1105 * Checks if the given server does have a Mastodon style directory endpoint.
1107 * @param string $url URL of the given server
1108 * @param array $serverdata array with server data
1110 * @return array server data
1112 public static function checkMastodonDirectory(string $url, array $serverdata)
1114 $curlResult = DI::httpClient()->get($url . '/api/v1/directory?limit=1');
1115 if (!$curlResult->isSuccess()) {
1119 $data = json_decode($curlResult->getBody(), true);
1124 if (count($data) == 1) {
1125 $serverdata['directory-type'] = self::DT_MASTODON;
1132 * Detects Peertube via their known endpoint
1134 * @param string $url URL of the given server
1135 * @param array $serverdata array with server data
1137 * @return array server data
1139 private static function detectPeertube(string $url, array $serverdata)
1141 $curlResult = DI::httpClient()->get($url . '/api/v1/config');
1143 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
1147 $data = json_decode($curlResult->getBody(), true);
1152 if (!empty($data['instance']) && !empty($data['serverVersion'])) {
1153 $serverdata['platform'] = 'peertube';
1154 $serverdata['version'] = $data['serverVersion'];
1155 $serverdata['network'] = Protocol::ACTIVITYPUB;
1157 if (!empty($data['instance']['name'])) {
1158 $serverdata['site_name'] = $data['instance']['name'];
1161 if (!empty($data['instance']['shortDescription'])) {
1162 $serverdata['info'] = $data['instance']['shortDescription'];
1165 if (!empty($data['signup'])) {
1166 if (!empty($data['signup']['allowed'])) {
1167 $serverdata['register_policy'] = Register::OPEN;
1171 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1172 $serverdata['detection-method'] = self::DETECT_V1_CONFIG;
1180 * Detects the version number of a given server when it was a NextCloud installation
1182 * @param string $url URL of the given server
1183 * @param array $serverdata array with server data
1185 * @return array server data
1187 private static function detectNextcloud(string $url, array $serverdata)
1189 $curlResult = DI::httpClient()->get($url . '/status.php');
1191 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
1195 $data = json_decode($curlResult->getBody(), true);
1200 if (!empty($data['version'])) {
1201 $serverdata['platform'] = 'nextcloud';
1202 $serverdata['version'] = $data['version'];
1203 $serverdata['network'] = Protocol::ACTIVITYPUB;
1205 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1206 $serverdata['detection-method'] = self::DETECT_STATUS_PHP;
1214 * Detects data from a given server url if it was a mastodon alike system
1216 * @param string $url URL of the given server
1217 * @param array $serverdata array with server data
1219 * @return array server data
1221 private static function detectMastodonAlikes(string $url, array $serverdata)
1223 $curlResult = DI::httpClient()->get($url . '/api/v1/instance');
1225 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
1229 $data = json_decode($curlResult->getBody(), true);
1234 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1235 $serverdata['detection-method'] = self::DETECT_MASTODON_API;
1238 if (!empty($data['version'])) {
1239 $serverdata['platform'] = 'mastodon';
1240 $serverdata['version'] = $data['version'] ?? '';
1241 $serverdata['network'] = Protocol::ACTIVITYPUB;
1244 if (!empty($data['title'])) {
1245 $serverdata['site_name'] = $data['title'];
1248 if (!empty($data['title']) && empty($serverdata['platform']) && empty($serverdata['network'])) {
1249 $serverdata['platform'] = 'mastodon';
1250 $serverdata['network'] = Protocol::ACTIVITYPUB;
1253 if (!empty($data['description'])) {
1254 $serverdata['info'] = trim($data['description']);
1257 if (!empty($data['stats']['user_count'])) {
1258 $serverdata['registered-users'] = max($data['stats']['user_count'], 1);
1261 if (!empty($serverdata['version']) && preg_match('/.*?\(compatible;\s(.*)\s(.*)\)/ism', $serverdata['version'], $matches)) {
1262 $serverdata['platform'] = strtolower($matches[1]);
1263 $serverdata['version'] = $matches[2];
1266 if (!empty($serverdata['version']) && strstr(strtolower($serverdata['version']), 'pleroma')) {
1267 $serverdata['platform'] = 'pleroma';
1268 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version']));
1271 if (!empty($serverdata['platform']) && strstr($serverdata['platform'], 'pleroma')) {
1272 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['platform']));
1273 $serverdata['platform'] = 'pleroma';
1280 * Detects data from typical Hubzilla endpoints
1282 * @param string $url URL of the given server
1283 * @param array $serverdata array with server data
1285 * @return array server data
1287 private static function detectHubzilla(string $url, array $serverdata)
1289 $curlResult = DI::httpClient()->get($url . '/api/statusnet/config.json');
1290 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
1294 $data = json_decode($curlResult->getBody(), true);
1295 if (empty($data) || empty($data['site'])) {
1299 if (!empty($data['site']['name'])) {
1300 $serverdata['site_name'] = $data['site']['name'];
1303 if (!empty($data['site']['platform'])) {
1304 $serverdata['platform'] = strtolower($data['site']['platform']['PLATFORM_NAME']);
1305 $serverdata['version'] = $data['site']['platform']['STD_VERSION'];
1306 $serverdata['network'] = Protocol::ZOT;
1309 if (!empty($data['site']['hubzilla'])) {
1310 $serverdata['platform'] = strtolower($data['site']['hubzilla']['PLATFORM_NAME']);
1311 $serverdata['version'] = $data['site']['hubzilla']['RED_VERSION'];
1312 $serverdata['network'] = Protocol::ZOT;
1315 if (!empty($data['site']['redmatrix'])) {
1316 if (!empty($data['site']['redmatrix']['PLATFORM_NAME'])) {
1317 $serverdata['platform'] = strtolower($data['site']['redmatrix']['PLATFORM_NAME']);
1318 } elseif (!empty($data['site']['redmatrix']['RED_PLATFORM'])) {
1319 $serverdata['platform'] = strtolower($data['site']['redmatrix']['RED_PLATFORM']);
1322 $serverdata['version'] = $data['site']['redmatrix']['RED_VERSION'];
1323 $serverdata['network'] = Protocol::ZOT;
1327 $inviteonly = false;
1330 if (!empty($data['site']['closed'])) {
1331 $closed = self::toBoolean($data['site']['closed']);
1334 if (!empty($data['site']['private'])) {
1335 $private = self::toBoolean($data['site']['private']);
1338 if (!empty($data['site']['inviteonly'])) {
1339 $inviteonly = self::toBoolean($data['site']['inviteonly']);
1342 if (!$closed && !$private and $inviteonly) {
1343 $serverdata['register_policy'] = Register::APPROVE;
1344 } elseif (!$closed && !$private) {
1345 $serverdata['register_policy'] = Register::OPEN;
1347 $serverdata['register_policy'] = Register::CLOSED;
1350 if (!empty($serverdata['network']) && in_array($serverdata['detection-method'],
1351 [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1352 $serverdata['detection-method'] = self::DETECT_CONFIG_JSON;
1359 * Converts input value to a boolean value
1361 * @param string|integer $val
1365 private static function toBoolean($val)
1367 if (($val == 'true') || ($val == 1)) {
1369 } elseif (($val == 'false') || ($val == 0)) {
1377 * Detect if the URL belongs to a pump.io server
1379 * @param string $url URL of the given server
1380 * @param array $serverdata array with server data
1382 * @return array server data
1384 private static function detectPumpIO(string $url, array $serverdata)
1386 $curlResult = DI::httpClient()->get($url . '/.well-known/host-meta.json');
1387 if (!$curlResult->isSuccess()) {
1391 $data = json_decode($curlResult->getBody(), true);
1392 if (empty($data['links'])) {
1397 // We are looking for some endpoints that are typical for pump.io
1399 foreach ($data['links'] as $link) {
1400 if (empty($link['rel'])) {
1403 if (in_array($link['rel'], ['registration_endpoint', 'dialback', 'http://apinamespace.org/activitypub/whoami'])) {
1409 $serverdata['detection-method'] = self::DETECT_PUMPIO;
1411 $serverdata['platform'] = 'pumpio';
1412 $serverdata['version'] = '';
1413 $serverdata['network'] = Protocol::PUMPIO;
1415 $servers = $curlResult->getHeader('Server');
1416 foreach ($servers as $server) {
1417 if (preg_match("#pump.io/(.*)\s#U", $server, $matches)) {
1418 $serverdata['version'] = $matches[1];
1427 * Detect if the URL belongs to a GNU Social server
1429 * @param string $url URL of the given server
1430 * @param array $serverdata array with server data
1432 * @return array server data
1434 private static function detectGNUSocial(string $url, array $serverdata)
1436 // Test for GNU Social
1437 $curlResult = DI::httpClient()->get($url . '/api/gnusocial/version.json');
1438 if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') &&
1439 ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) {
1440 $serverdata['platform'] = 'gnusocial';
1441 // Remove junk that some GNU Social servers return
1442 $serverdata['version'] = str_replace(chr(239) . chr(187) . chr(191), '', $curlResult->getBody());
1443 $serverdata['version'] = str_replace(["\r", "\n", "\t"], '', $serverdata['version']);
1444 $serverdata['version'] = trim($serverdata['version'], '"');
1445 $serverdata['network'] = Protocol::OSTATUS;
1447 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1448 $serverdata['detection-method'] = self::DETECT_GNUSOCIAL;
1454 // Test for Statusnet
1455 $curlResult = DI::httpClient()->get($url . '/api/statusnet/version.json');
1456 if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') &&
1457 ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) {
1459 // Remove junk that some GNU Social servers return
1460 $serverdata['version'] = str_replace(chr(239).chr(187).chr(191), '', $curlResult->getBody());
1461 $serverdata['version'] = str_replace(["\r", "\n", "\t"], '', $serverdata['version']);
1462 $serverdata['version'] = trim($serverdata['version'], '"');
1464 if (!empty($serverdata['version']) && strtolower(substr($serverdata['version'], 0, 7)) == 'pleroma') {
1465 $serverdata['platform'] = 'pleroma';
1466 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version']));
1467 $serverdata['network'] = Protocol::ACTIVITYPUB;
1469 $serverdata['platform'] = 'statusnet';
1470 $serverdata['network'] = Protocol::OSTATUS;
1473 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1474 $serverdata['detection-method'] = self::DETECT_STATUSNET;
1482 * Detect if the URL belongs to a Friendica server
1484 * @param string $url URL of the given server
1485 * @param array $serverdata array with server data
1487 * @return array server data
1489 private static function detectFriendica(string $url, array $serverdata)
1491 $curlResult = DI::httpClient()->get($url . '/friendica/json');
1492 if (!$curlResult->isSuccess()) {
1493 $curlResult = DI::httpClient()->get($url . '/friendika/json');
1495 $platform = 'Friendika';
1498 $platform = 'Friendica';
1501 if (!$curlResult->isSuccess()) {
1505 $data = json_decode($curlResult->getBody(), true);
1506 if (empty($data) || empty($data['version'])) {
1510 if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) {
1511 $serverdata['detection-method'] = $friendika ? self::DETECT_FRIENDIKA : self::DETECT_FRIENDICA;
1514 $serverdata['network'] = Protocol::DFRN;
1515 $serverdata['version'] = $data['version'];
1517 if (!empty($data['no_scrape_url'])) {
1518 $serverdata['noscrape'] = $data['no_scrape_url'];
1521 if (!empty($data['site_name'])) {
1522 $serverdata['site_name'] = $data['site_name'];
1525 if (!empty($data['info'])) {
1526 $serverdata['info'] = trim($data['info']);
1529 $register_policy = ($data['register_policy'] ?? '') ?: 'REGISTER_CLOSED';
1530 switch ($register_policy) {
1531 case 'REGISTER_OPEN':
1532 $serverdata['register_policy'] = Register::OPEN;
1535 case 'REGISTER_APPROVE':
1536 $serverdata['register_policy'] = Register::APPROVE;
1539 case 'REGISTER_CLOSED':
1540 case 'REGISTER_INVITATION':
1541 $serverdata['register_policy'] = Register::CLOSED;
1544 Logger::info('Register policy is invalid', ['policy' => $register_policy, 'server' => $url]);
1545 $serverdata['register_policy'] = Register::CLOSED;
1549 $serverdata['platform'] = strtolower($data['platform'] ?? $platform);
1555 * Analyses the landing page of a given server for hints about type and system of that server
1557 * @param object $curlResult result of curl execution
1558 * @param array $serverdata array with server data
1559 * @param string $url Server URL
1561 * @return array server data
1563 private static function analyseRootBody($curlResult, array $serverdata, string $url)
1565 if (empty($curlResult->getBody())) {
1569 $doc = new DOMDocument();
1570 @$doc->loadHTML($curlResult->getBody());
1571 $xpath = new DOMXPath($doc);
1573 $title = trim(XML::getFirstNodeValue($xpath, '//head/title/text()'));
1574 if (!empty($title)) {
1575 $serverdata['site_name'] = $title;
1578 $list = $xpath->query('//meta[@name]');
1580 foreach ($list as $node) {
1582 if ($node->attributes->length) {
1583 foreach ($node->attributes as $attribute) {
1584 $value = trim($attribute->value);
1585 if (empty($value)) {
1589 $attr[$attribute->name] = $value;
1592 if (empty($attr['name']) || empty($attr['content'])) {
1597 if ($attr['name'] == 'description') {
1598 $serverdata['info'] = $attr['content'];
1601 if (in_array($attr['name'], ['application-name', 'al:android:app_name', 'al:ios:app_name',
1602 'twitter:app:name:googleplay', 'twitter:app:name:iphone', 'twitter:app:name:ipad'])) {
1603 $serverdata['platform'] = strtolower($attr['content']);
1604 if (in_array($attr['content'], ['Misskey', 'Write.as'])) {
1605 $serverdata['network'] = Protocol::ACTIVITYPUB;
1608 if (($attr['name'] == 'generator') && (empty($serverdata['platform']) || (substr(strtolower($attr['content']), 0, 9) == 'wordpress'))) {
1609 $serverdata['platform'] = strtolower($attr['content']);
1610 $version_part = explode(' ', $attr['content']);
1612 if (count($version_part) == 2) {
1613 if (in_array($version_part[0], ['WordPress'])) {
1614 $serverdata['platform'] = 'wordpress';
1615 $serverdata['version'] = $version_part[1];
1617 // We still do need a reliable test if some AP plugin is activated
1618 if (DBA::exists('apcontact', ['baseurl' => $url])) {
1619 $serverdata['network'] = Protocol::ACTIVITYPUB;
1621 $serverdata['network'] = Protocol::FEED;
1624 if ($serverdata['detection-method'] == self::DETECT_MANUAL) {
1625 $serverdata['detection-method'] = self::DETECT_BODY;
1628 if (in_array($version_part[0], ['Friendika', 'Friendica'])) {
1629 $serverdata['platform'] = strtolower($version_part[0]);
1630 $serverdata['version'] = $version_part[1];
1631 $serverdata['network'] = Protocol::DFRN;
1637 $list = $xpath->query('//meta[@property]');
1639 foreach ($list as $node) {
1641 if ($node->attributes->length) {
1642 foreach ($node->attributes as $attribute) {
1643 $value = trim($attribute->value);
1644 if (empty($value)) {
1648 $attr[$attribute->name] = $value;
1651 if (empty($attr['property']) || empty($attr['content'])) {
1656 if ($attr['property'] == 'og:site_name') {
1657 $serverdata['site_name'] = $attr['content'];
1660 if ($attr['property'] == 'og:description') {
1661 $serverdata['info'] = $attr['content'];
1664 if ($attr['property'] == 'og:platform') {
1665 $serverdata['platform'] = strtolower($attr['content']);
1667 if (in_array($attr['content'], ['PeerTube'])) {
1668 $serverdata['network'] = Protocol::ACTIVITYPUB;
1672 if ($attr['property'] == 'generator') {
1673 $serverdata['platform'] = strtolower($attr['content']);
1675 if (in_array($attr['content'], ['hubzilla'])) {
1676 // We later check which compatible protocol modules are loaded.
1677 $serverdata['network'] = Protocol::ZOT;
1682 if (!empty($serverdata['network']) && ($serverdata['detection-method'] == self::DETECT_MANUAL)) {
1683 $serverdata['detection-method'] = self::DETECT_BODY;
1690 * Analyses the header data of a given server for hints about type and system of that server
1692 * @param object $curlResult result of curl execution
1693 * @param array $serverdata array with server data
1695 * @return array server data
1697 private static function analyseRootHeader($curlResult, array $serverdata)
1699 if ($curlResult->getHeader('server') == 'Mastodon') {
1700 $serverdata['platform'] = 'mastodon';
1701 $serverdata['network'] = Protocol::ACTIVITYPUB;
1702 } elseif ($curlResult->inHeader('x-diaspora-version')) {
1703 $serverdata['platform'] = 'diaspora';
1704 $serverdata['network'] = Protocol::DIASPORA;
1705 $serverdata['version'] = $curlResult->getHeader('x-diaspora-version')[0] ?? '';
1706 } elseif ($curlResult->inHeader('x-friendica-version')) {
1707 $serverdata['platform'] = 'friendica';
1708 $serverdata['network'] = Protocol::DFRN;
1709 $serverdata['version'] = $curlResult->getHeader('x-friendica-version')[0] ?? '';
1714 if ($serverdata['detection-method'] == self::DETECT_MANUAL) {
1715 $serverdata['detection-method'] = self::DETECT_HEADER;
1722 * Test if the body contains valid content
1724 * @param string $body
1727 private static function invalidBody(string $body)
1729 // Currently we only test for a HTML element.
1730 // Possibly we enhance this in the future.
1731 return !strpos($body, '>');
1735 * Update GServer entries
1737 public static function discover()
1739 // Update the server list
1740 self::discoverFederation();
1744 $requery_days = intval(DI::config()->get('system', 'poco_requery_days'));
1746 if ($requery_days == 0) {
1750 $last_update = date('c', time() - (60 * 60 * 24 * $requery_days));
1752 $gservers = DBA::select('gserver', ['id', 'url', 'nurl', 'network', 'poco', 'directory-type'],
1753 ["NOT `failed` AND `directory-type` != ? AND `last_poco_query` < ?", GServer::DT_NONE, $last_update],
1754 ['order' => ['RAND()']]);
1756 while ($gserver = DBA::fetch($gservers)) {
1757 Logger::info('Update peer list', ['server' => $gserver['url'], 'id' => $gserver['id']]);
1758 Worker::add(PRIORITY_LOW, 'UpdateServerPeers', $gserver['url']);
1760 Logger::info('Update directory', ['server' => $gserver['url'], 'id' => $gserver['id']]);
1761 Worker::add(PRIORITY_LOW, 'UpdateServerDirectory', $gserver);
1763 $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
1764 DBA::update('gserver', $fields, ['nurl' => $gserver['nurl']]);
1766 if (--$no_of_queries == 0) {
1771 DBA::close($gservers);
1775 * Discover federated servers
1777 private static function discoverFederation()
1779 $last = DI::config()->get('poco', 'last_federation_discovery');
1782 $next = $last + (24 * 60 * 60);
1784 if ($next > time()) {
1789 // Discover federated servers
1790 $protocols = ['activitypub', 'diaspora', 'dfrn', 'ostatus'];
1791 foreach ($protocols as $protocol) {
1792 $query = '{nodes(protocol:"' . $protocol . '"){host}}';
1793 $curlResult = DI::httpClient()->fetch('https://the-federation.info/graphql?query=' . urlencode($query));
1794 if (!empty($curlResult)) {
1795 $data = json_decode($curlResult, true);
1796 if (!empty($data['data']['nodes'])) {
1797 foreach ($data['data']['nodes'] as $server) {
1798 // Using "only_nodeinfo" since servers that are listed on that page should always have it.
1799 self::add('https://' . $server['host'], true);
1805 // Disvover Mastodon servers
1806 $accesstoken = DI::config()->get('system', 'instances_social_key');
1808 if (!empty($accesstoken)) {
1809 $api = 'https://instances.social/api/1.0/instances/list?count=0';
1810 $curlResult = DI::httpClient()->get($api, [HttpClientOptions::HEADERS => ['Authorization' => ['Bearer ' . $accesstoken]]]);
1812 if ($curlResult->isSuccess()) {
1813 $servers = json_decode($curlResult->getBody(), true);
1815 foreach ($servers['instances'] as $server) {
1816 $url = (is_null($server['https_score']) ? 'http' : 'https') . '://' . $server['name'];
1822 DI::config()->set('poco', 'last_federation_discovery', time());
1826 * Set the protocol for the given server
1828 * @param int $gsid Server id
1829 * @param int $protocol Protocol id
1833 public static function setProtocol(int $gsid, int $protocol)
1839 $gserver = DBA::selectFirst('gserver', ['protocol', 'url'], ['id' => $gsid]);
1840 if (!DBA::isResult($gserver)) {
1844 $old = $gserver['protocol'];
1846 if (!is_null($old)) {
1848 The priority for the protocols is:
1850 2. DFRN via Diaspora
1856 // We don't need to change it when nothing is to be changed
1857 if ($old == $protocol) {
1861 // We don't want to mark a server as OStatus when it had been marked with any other protocol before
1862 if ($protocol == Post\DeliveryData::OSTATUS) {
1866 // If the server is marked as ActivityPub then we won't change it to anything different
1867 if ($old == Post\DeliveryData::ACTIVITYPUB) {
1871 // Don't change it to anything lower than DFRN if the new one wasn't ActivityPub
1872 if (($old == Post\DeliveryData::DFRN) && ($protocol != Post\DeliveryData::ACTIVITYPUB)) {
1876 // Don't change it to Diaspora when it is a legacy DFRN server
1877 if (($old == Post\DeliveryData::LEGACY_DFRN) && ($protocol == Post\DeliveryData::DIASPORA)) {
1882 Logger::info('Protocol for server', ['protocol' => $protocol, 'old' => $old, 'id' => $gsid, 'url' => $gserver['url'], 'callstack' => System::callstack(20)]);
1883 DBA::update('gserver', ['protocol' => $protocol], ['id' => $gsid]);
1887 * Fetch the protocol of the given server
1889 * @param int $gsid Server id
1893 public static function getProtocol(int $gsid)
1899 $gserver = DBA::selectFirst('gserver', ['protocol'], ['id' => $gsid]);
1900 if (DBA::isResult($gserver)) {
1901 return $gserver['protocol'];