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\Protocol;
27 use Friendica\Core\Worker;
28 use Friendica\Database\DBA;
30 use Friendica\Module\Register;
31 use Friendica\Network\CurlResult;
32 use Friendica\Util\Network;
33 use Friendica\Util\DateTimeFormat;
34 use Friendica\Util\Strings;
35 use Friendica\Util\XML;
36 use Friendica\Core\Logger;
37 use Friendica\Protocol\PortableContact;
38 use Friendica\Protocol\Diaspora;
39 use Friendica\Network\Probe;
42 * This class handles GServer related functions
49 const DT_MASTODON = 2;
51 * Checks if the given server is reachable
53 * @param string $profile URL of the given profile
54 * @param string $server URL of the given server (If empty, taken from profile)
55 * @param string $network Network value that is used, when detection failed
56 * @param boolean $force Force an update.
58 * @return boolean 'true' if server seems vital
60 public static function reachable(string $profile, string $server = '', string $network = '', bool $force = false)
63 $server = GContact::getBasepath($profile);
70 return self::check($server, $network, $force);
74 * Decides if a server needs to be updated, based upon several date fields
76 * @param date $created Creation date of that server entry
77 * @param date $updated When had the server entry be updated
78 * @param date $last_failure Last failure when contacting that server
79 * @param date $last_contact Last time the server had been contacted
81 * @return boolean Does the server record needs an update?
83 public static function updateNeeded($created, $updated, $last_failure, $last_contact)
85 $now = strtotime(DateTimeFormat::utcNow());
87 if ($updated > $last_contact) {
88 $contact_time = strtotime($updated);
90 $contact_time = strtotime($last_contact);
93 $failure_time = strtotime($last_failure);
94 $created_time = strtotime($created);
96 // If there is no "created" time then use the current time
97 if ($created_time <= 0) {
101 // If the last contact was less than 24 hours then don't update
102 if (($now - $contact_time) < (60 * 60 * 24)) {
106 // If the last failure was less than 24 hours then don't update
107 if (($now - $failure_time) < (60 * 60 * 24)) {
111 // If the last contact was less than a week ago and the last failure is older than a week then don't update
112 //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) && ($contact_time > $failure_time))
115 // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
116 if ((($now - $contact_time) > (60 * 60 * 24 * 7)) && (($now - $created_time) > (60 * 60 * 24 * 7)) && (($now - $failure_time) < (60 * 60 * 24 * 7))) {
120 // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
121 if ((($now - $contact_time) > (60 * 60 * 24 * 30)) && (($now - $created_time) > (60 * 60 * 24 * 30)) && (($now - $failure_time) < (60 * 60 * 24 * 30))) {
129 * Checks the state of the given server.
131 * @param string $server_url URL of the given server
132 * @param string $network Network value that is used, when detection failed
133 * @param boolean $force Force an update.
135 * @return boolean 'true' if server seems vital
137 public static function check(string $server_url, string $network = '', bool $force = false)
139 // Unify the server address
140 $server_url = trim($server_url, '/');
141 $server_url = str_replace('/index.php', '', $server_url);
143 if ($server_url == '') {
147 $gserver = DBA::selectFirst('gserver', [], ['nurl' => Strings::normaliseLink($server_url)]);
148 if (DBA::isResult($gserver)) {
149 if ($gserver['created'] <= DBA::NULL_DATETIME) {
150 $fields = ['created' => DateTimeFormat::utcNow()];
151 $condition = ['nurl' => Strings::normaliseLink($server_url)];
152 DBA::update('gserver', $fields, $condition);
155 $last_contact = $gserver['last_contact'];
156 $last_failure = $gserver['last_failure'];
158 // See discussion under https://forum.friendi.ca/display/0b6b25a8135aabc37a5a0f5684081633
159 // It can happen that a zero date is in the database, but storing it again is forbidden.
160 if ($last_contact < DBA::NULL_DATETIME) {
161 $last_contact = DBA::NULL_DATETIME;
164 if ($last_failure < DBA::NULL_DATETIME) {
165 $last_failure = DBA::NULL_DATETIME;
168 if (!$force && !self::updateNeeded($gserver['created'], '', $last_failure, $last_contact)) {
169 Logger::info('No update needed', ['server' => $server_url]);
170 return ($last_contact >= $last_failure);
172 Logger::info('Server is outdated. Start discovery.', ['Server' => $server_url, 'Force' => $force, 'Created' => $gserver['created'], 'Failure' => $last_failure, 'Contact' => $last_contact]);
174 Logger::info('Server is unknown. Start discovery.', ['Server' => $server_url]);
177 return self::detect($server_url, $network);
181 * Detect server data (type, protocol, version number, ...)
182 * The detected data is then updated or inserted in the gserver table.
184 * @param string $url URL of the given server
185 * @param string $network Network value that is used, when detection failed
187 * @return boolean 'true' if server could be detected
189 public static function detect(string $url, string $network = '')
191 Logger::info('Detect server type', ['server' => $url]);
194 $original_url = $url;
196 // Remove URL content that is not supposed to exist for a server url
197 $urlparts = parse_url($url);
198 unset($urlparts['user']);
199 unset($urlparts['pass']);
200 unset($urlparts['query']);
201 unset($urlparts['fragment']);
202 $url = Network::unparseURL($urlparts);
204 // If the URL missmatches, then we mark the old entry as failure
205 if ($url != $original_url) {
206 DBA::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => Strings::normaliseLink($original_url)]);
209 // When a nodeinfo is present, we don't need to dig further
210 $xrd_timeout = DI::config()->get('system', 'xrd_timeout');
211 $curlResult = Network::curl($url . '/.well-known/nodeinfo', false, ['timeout' => $xrd_timeout]);
212 if ($curlResult->isTimeout()) {
213 DBA::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => Strings::normaliseLink($url)]);
217 $nodeinfo = self::fetchNodeinfo($url, $curlResult);
219 // When nodeinfo isn't present, we use the older 'statistics.json' endpoint
220 if (empty($nodeinfo)) {
221 $nodeinfo = self::fetchStatistics($url);
224 // If that didn't work out well, we use some protocol specific endpoints
225 // For Friendica and Zot based networks we have to dive deeper to reveal more details
226 if (empty($nodeinfo['network']) || in_array($nodeinfo['network'], [Protocol::DFRN, Protocol::ZOT])) {
227 // Fetch the landing page, possibly it reveals some data
228 if (empty($nodeinfo['network'])) {
229 $curlResult = Network::curl($url, false, ['timeout' => $xrd_timeout]);
230 if ($curlResult->isSuccess()) {
231 $serverdata = self::analyseRootHeader($curlResult, $serverdata);
232 $serverdata = self::analyseRootBody($curlResult, $serverdata, $url);
235 if (!$curlResult->isSuccess() || empty($curlResult->getBody()) || self::invalidBody($curlResult->getBody())) {
236 DBA::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => Strings::normaliseLink($url)]);
241 if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ACTIVITYPUB)) {
242 $serverdata = self::detectMastodonAlikes($url, $serverdata);
245 // All following checks are done for systems that always have got a "host-meta" endpoint.
246 // With this check we don't have to waste time and ressources for dead systems.
247 // Also this hopefully prevents us from receiving abuse messages.
248 if (empty($serverdata['network']) && !self::validHostMeta($url)) {
249 DBA::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => Strings::normaliseLink($url)]);
253 if (empty($serverdata['network']) || in_array($serverdata['network'], [Protocol::DFRN, Protocol::ACTIVITYPUB])) {
254 $serverdata = self::detectFriendica($url, $serverdata);
257 // the 'siteinfo.json' is some specific endpoint of Hubzilla and Red
258 if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ZOT)) {
259 $serverdata = self::fetchSiteinfo($url, $serverdata);
262 // The 'siteinfo.json' doesn't seem to be present on older Hubzilla installations
263 if (empty($serverdata['network'])) {
264 $serverdata = self::detectHubzilla($url, $serverdata);
267 if (empty($serverdata['network'])) {
268 $serverdata = self::detectNextcloud($url, $serverdata);
271 if (empty($serverdata['network'])) {
272 $serverdata = self::detectGNUSocial($url, $serverdata);
275 $serverdata = $nodeinfo;
278 // Detect the directory type
279 $serverdata['directory-type'] = self::DT_NONE;
280 $serverdata = self::checkPoCo($url, $serverdata);
281 $serverdata = self::checkMastodonDirectory($url, $serverdata);
283 // We can't detect the network type. Possibly it is some system that we don't know yet
284 if (empty($serverdata['network'])) {
285 $serverdata['network'] = Protocol::PHANTOM;
288 // When we hadn't been able to detect the network type, we use the hint from the parameter
289 if (($serverdata['network'] == Protocol::PHANTOM) && !empty($network)) {
290 $serverdata['network'] = $network;
293 $serverdata['url'] = $url;
294 $serverdata['nurl'] = Strings::normaliseLink($url);
296 // We take the highest number that we do find
297 $registeredUsers = $serverdata['registered-users'] ?? 0;
299 // On an active server there has to be at least a single user
300 if (($serverdata['network'] != Protocol::PHANTOM) && ($registeredUsers == 0)) {
301 $registeredUsers = 1;
304 if ($serverdata['network'] != Protocol::PHANTOM) {
305 $gcontacts = DBA::count('gcontact', ['server_url' => [$url, $serverdata['nurl']]]);
306 $apcontacts = DBA::count('apcontact', ['baseurl' => [$url, $serverdata['nurl']]]);
307 $contacts = DBA::count('contact', ['uid' => 0, 'baseurl' => [$url, $serverdata['nurl']]]);
308 $serverdata['registered-users'] = max($gcontacts, $apcontacts, $contacts, $registeredUsers);
310 $serverdata['registered-users'] = $registeredUsers;
311 $serverdata = self::detectNetworkViaContacts($url, $serverdata);
314 $serverdata['last_contact'] = DateTimeFormat::utcNow();
316 $gserver = DBA::selectFirst('gserver', ['network'], ['nurl' => Strings::normaliseLink($url)]);
317 if (!DBA::isResult($gserver)) {
318 $serverdata['created'] = DateTimeFormat::utcNow();
319 $ret = DBA::insert('gserver', $serverdata);
321 // Don't override the network with 'unknown' when there had been a valid entry before
322 if (($serverdata['network'] == Protocol::PHANTOM) && !empty($gserver['network'])) {
323 unset($serverdata['network']);
326 $ret = DBA::update('gserver', $serverdata, ['nurl' => $serverdata['nurl']]);
329 if (!empty($serverdata['network']) && in_array($serverdata['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
330 self::discoverRelay($url);
337 * Fetch relay data from a given server url
339 * @param string $server_url address of the server
340 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
342 private static function discoverRelay(string $server_url)
344 Logger::info('Discover relay data', ['server' => $server_url]);
346 $curlResult = Network::curl($server_url . '/.well-known/x-social-relay');
347 if (!$curlResult->isSuccess()) {
351 $data = json_decode($curlResult->getBody(), true);
352 if (!is_array($data)) {
356 $gserver = DBA::selectFirst('gserver', ['id', 'relay-subscribe', 'relay-scope'], ['nurl' => Strings::normaliseLink($server_url)]);
357 if (!DBA::isResult($gserver)) {
361 if (($gserver['relay-subscribe'] != $data['subscribe']) || ($gserver['relay-scope'] != $data['scope'])) {
362 $fields = ['relay-subscribe' => $data['subscribe'], 'relay-scope' => $data['scope']];
363 DBA::update('gserver', $fields, ['id' => $gserver['id']]);
366 DBA::delete('gserver-tag', ['gserver-id' => $gserver['id']]);
368 if ($data['scope'] == 'tags') {
371 foreach ($data['tags'] as $tag) {
372 $tag = mb_strtolower($tag);
373 if (strlen($tag) < 100) {
378 foreach ($tags as $tag) {
379 DBA::insert('gserver-tag', ['gserver-id' => $gserver['id'], 'tag' => $tag], true);
383 // Create or update the relay contact
385 if (isset($data['protocols'])) {
386 if (isset($data['protocols']['diaspora'])) {
387 $fields['network'] = Protocol::DIASPORA;
389 if (isset($data['protocols']['diaspora']['receive'])) {
390 $fields['batch'] = $data['protocols']['diaspora']['receive'];
391 } elseif (is_string($data['protocols']['diaspora'])) {
392 $fields['batch'] = $data['protocols']['diaspora'];
396 if (isset($data['protocols']['dfrn'])) {
397 $fields['network'] = Protocol::DFRN;
399 if (isset($data['protocols']['dfrn']['receive'])) {
400 $fields['batch'] = $data['protocols']['dfrn']['receive'];
401 } elseif (is_string($data['protocols']['dfrn'])) {
402 $fields['batch'] = $data['protocols']['dfrn'];
406 Diaspora::setRelayContact($server_url, $fields);
410 * Fetch server data from '/statistics.json' on the given server
412 * @param string $url URL of the given server
414 * @return array server data
416 private static function fetchStatistics(string $url)
418 $curlResult = Network::curl($url . '/statistics.json');
419 if (!$curlResult->isSuccess()) {
423 $data = json_decode($curlResult->getBody(), true);
430 if (!empty($data['version'])) {
431 $serverdata['version'] = $data['version'];
432 // Version numbers on statistics.json are presented with additional info, e.g.:
433 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
434 $serverdata['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $serverdata['version']);
437 if (!empty($data['name'])) {
438 $serverdata['site_name'] = $data['name'];
441 if (!empty($data['network'])) {
442 $serverdata['platform'] = strtolower($data['network']);
444 if ($serverdata['platform'] == 'diaspora') {
445 $serverdata['network'] = Protocol::DIASPORA;
446 } elseif ($serverdata['platform'] == 'friendica') {
447 $serverdata['network'] = Protocol::DFRN;
448 } elseif ($serverdata['platform'] == 'hubzilla') {
449 $serverdata['network'] = Protocol::ZOT;
450 } elseif ($serverdata['platform'] == 'redmatrix') {
451 $serverdata['network'] = Protocol::ZOT;
456 if (!empty($data['registrations_open'])) {
457 $serverdata['register_policy'] = Register::OPEN;
459 $serverdata['register_policy'] = Register::CLOSED;
466 * Detect server type by using the nodeinfo data
468 * @param string $url address of the server
469 * @param CurlResult $curlResult
470 * @return array Server data
471 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
473 private static function fetchNodeinfo(string $url, CurlResult $curlResult)
475 $nodeinfo = json_decode($curlResult->getBody(), true);
477 if (!is_array($nodeinfo) || empty($nodeinfo['links'])) {
484 foreach ($nodeinfo['links'] as $link) {
485 if (!is_array($link) || empty($link['rel']) || empty($link['href'])) {
486 Logger::info('Invalid nodeinfo format', ['url' => $url]);
489 if ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
490 $nodeinfo1_url = $link['href'];
491 } elseif ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/2.0') {
492 $nodeinfo2_url = $link['href'];
496 if ($nodeinfo1_url . $nodeinfo2_url == '') {
502 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
503 if (!empty($nodeinfo2_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo2_url, PHP_URL_HOST))) {
504 $server = self::parseNodeinfo2($nodeinfo2_url);
507 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
508 if (empty($server) && !empty($nodeinfo1_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo1_url, PHP_URL_HOST))) {
509 $server = self::parseNodeinfo1($nodeinfo1_url);
518 * @param string $nodeinfo_url address of the nodeinfo path
519 * @return array Server data
520 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
522 private static function parseNodeinfo1(string $nodeinfo_url)
524 $curlResult = Network::curl($nodeinfo_url);
526 if (!$curlResult->isSuccess()) {
530 $nodeinfo = json_decode($curlResult->getBody(), true);
532 if (!is_array($nodeinfo)) {
538 $server['register_policy'] = Register::CLOSED;
540 if (!empty($nodeinfo['openRegistrations'])) {
541 $server['register_policy'] = Register::OPEN;
544 if (is_array($nodeinfo['software'])) {
545 if (!empty($nodeinfo['software']['name'])) {
546 $server['platform'] = strtolower($nodeinfo['software']['name']);
549 if (!empty($nodeinfo['software']['version'])) {
550 $server['version'] = $nodeinfo['software']['version'];
551 // Version numbers on Nodeinfo are presented with additional info, e.g.:
552 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
553 $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']);
557 if (!empty($nodeinfo['metadata']['nodeName'])) {
558 $server['site_name'] = $nodeinfo['metadata']['nodeName'];
561 if (!empty($nodeinfo['usage']['users']['total'])) {
562 $server['registered-users'] = $nodeinfo['usage']['users']['total'];
565 if (!empty($nodeinfo['protocols']['inbound']) && is_array($nodeinfo['protocols']['inbound'])) {
567 foreach ($nodeinfo['protocols']['inbound'] as $protocol) {
568 $protocols[$protocol] = true;
571 if (!empty($protocols['friendica'])) {
572 $server['network'] = Protocol::DFRN;
573 } elseif (!empty($protocols['activitypub'])) {
574 $server['network'] = Protocol::ACTIVITYPUB;
575 } elseif (!empty($protocols['diaspora'])) {
576 $server['network'] = Protocol::DIASPORA;
577 } elseif (!empty($protocols['ostatus'])) {
578 $server['network'] = Protocol::OSTATUS;
579 } elseif (!empty($protocols['gnusocial'])) {
580 $server['network'] = Protocol::OSTATUS;
581 } elseif (!empty($protocols['zot'])) {
582 $server['network'] = Protocol::ZOT;
586 if (empty($server)) {
596 * @param string $nodeinfo_url address of the nodeinfo path
597 * @return array Server data
598 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
600 private static function parseNodeinfo2(string $nodeinfo_url)
602 $curlResult = Network::curl($nodeinfo_url);
603 if (!$curlResult->isSuccess()) {
607 $nodeinfo = json_decode($curlResult->getBody(), true);
609 if (!is_array($nodeinfo)) {
615 $server['register_policy'] = Register::CLOSED;
617 if (!empty($nodeinfo['openRegistrations'])) {
618 $server['register_policy'] = Register::OPEN;
621 if (is_array($nodeinfo['software'])) {
622 if (!empty($nodeinfo['software']['name'])) {
623 $server['platform'] = strtolower($nodeinfo['software']['name']);
626 if (!empty($nodeinfo['software']['version'])) {
627 $server['version'] = $nodeinfo['software']['version'];
628 // Version numbers on Nodeinfo are presented with additional info, e.g.:
629 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
630 $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']);
634 if (!empty($nodeinfo['metadata']['nodeName'])) {
635 $server['site_name'] = $nodeinfo['metadata']['nodeName'];
638 if (!empty($nodeinfo['usage']['users']['total'])) {
639 $server['registered-users'] = $nodeinfo['usage']['users']['total'];
642 if (!empty($nodeinfo['protocols'])) {
644 foreach ($nodeinfo['protocols'] as $protocol) {
645 $protocols[$protocol] = true;
648 if (!empty($protocols['dfrn'])) {
649 $server['network'] = Protocol::DFRN;
650 } elseif (!empty($protocols['activitypub'])) {
651 $server['network'] = Protocol::ACTIVITYPUB;
652 } elseif (!empty($protocols['diaspora'])) {
653 $server['network'] = Protocol::DIASPORA;
654 } elseif (!empty($protocols['ostatus'])) {
655 $server['network'] = Protocol::OSTATUS;
656 } elseif (!empty($protocols['gnusocial'])) {
657 $server['network'] = Protocol::OSTATUS;
658 } elseif (!empty($protocols['zot'])) {
659 $server['network'] = Protocol::ZOT;
663 if (empty($server)) {
671 * Fetch server information from a 'siteinfo.json' file on the given server
673 * @param string $url URL of the given server
674 * @param array $serverdata array with server data
676 * @return array server data
678 private static function fetchSiteinfo(string $url, array $serverdata)
680 $curlResult = Network::curl($url . '/siteinfo.json');
681 if (!$curlResult->isSuccess()) {
685 $data = json_decode($curlResult->getBody(), true);
690 if (!empty($data['url'])) {
691 $serverdata['platform'] = strtolower($data['platform']);
692 $serverdata['version'] = $data['version'];
695 if (!empty($data['plugins'])) {
696 if (in_array('pubcrawl', $data['plugins'])) {
697 $serverdata['network'] = Protocol::ACTIVITYPUB;
698 } elseif (in_array('diaspora', $data['plugins'])) {
699 $serverdata['network'] = Protocol::DIASPORA;
700 } elseif (in_array('gnusoc', $data['plugins'])) {
701 $serverdata['network'] = Protocol::OSTATUS;
703 $serverdata['network'] = Protocol::ZOT;
707 if (!empty($data['site_name'])) {
708 $serverdata['site_name'] = $data['site_name'];
711 if (!empty($data['channels_total'])) {
712 $serverdata['registered-users'] = $data['channels_total'];
715 if (!empty($data['register_policy'])) {
716 switch ($data['register_policy']) {
717 case 'REGISTER_OPEN':
718 $serverdata['register_policy'] = Register::OPEN;
721 case 'REGISTER_APPROVE':
722 $serverdata['register_policy'] = Register::APPROVE;
725 case 'REGISTER_CLOSED':
727 $serverdata['register_policy'] = Register::CLOSED;
736 * Checks if the server contains a valid host meta file
738 * @param string $url URL of the given server
740 * @return boolean 'true' if the server seems to be vital
742 private static function validHostMeta(string $url)
744 $xrd_timeout = DI::config()->get('system', 'xrd_timeout');
745 $curlResult = Network::curl($url . '/.well-known/host-meta', false, ['timeout' => $xrd_timeout]);
746 if (!$curlResult->isSuccess()) {
750 $xrd = XML::parseString($curlResult->getBody());
751 if (!is_object($xrd)) {
755 $elements = XML::elementToArray($xrd);
756 if (empty($elements) || empty($elements['xrd']) || empty($elements['xrd']['link'])) {
761 foreach ($elements['xrd']['link'] as $link) {
762 // When there is more than a single "link" element, the array looks slightly different
763 if (!empty($link['@attributes'])) {
764 $link = $link['@attributes'];
767 if (empty($link['rel']) || empty($link['template'])) {
771 if ($link['rel'] == 'lrdd') {
772 // When the webfinger host is the same like the system host, it should be ok.
773 $valid = (parse_url($url, PHP_URL_HOST) == parse_url($link['template'], PHP_URL_HOST));
781 * Detect the network of the given server via their known contacts
783 * @param string $url URL of the given server
784 * @param array $serverdata array with server data
786 * @return array server data
788 private static function detectNetworkViaContacts(string $url, array $serverdata)
792 $gcontacts = DBA::select('gcontact', ['url', 'nurl'], ['server_url' => [$url, $serverdata['nurl']]]);
793 while ($gcontact = DBA::fetch($gcontacts)) {
794 $contacts[$gcontact['nurl']] = $gcontact['url'];
796 DBA::close($gcontacts);
798 $apcontacts = DBA::select('apcontact', ['url'], ['baseurl' => [$url, $serverdata['nurl']]]);
799 while ($apcontact = DBA::fetch($apcontacts)) {
800 $contacts[Strings::normaliseLink($apcontact['url'])] = $apcontact['url'];
802 DBA::close($apcontacts);
804 $pcontacts = DBA::select('contact', ['url', 'nurl'], ['uid' => 0, 'baseurl' => [$url, $serverdata['nurl']]]);
805 while ($pcontact = DBA::fetch($pcontacts)) {
806 $contacts[$pcontact['nurl']] = $pcontact['url'];
808 DBA::close($pcontacts);
810 if (empty($contacts)) {
814 foreach ($contacts as $contact) {
815 $probed = Probe::uri($contact);
816 if (in_array($probed['network'], Protocol::FEDERATED)) {
817 $serverdata['network'] = $probed['network'];
822 $serverdata['registered-users'] = max($serverdata['registered-users'], count($contacts));
828 * Checks if the given server does have a '/poco' endpoint.
829 * This is used for the 'PortableContact' functionality,
830 * which is used by both Friendica and Hubzilla.
832 * @param string $url URL of the given server
833 * @param array $serverdata array with server data
835 * @return array server data
837 private static function checkPoCo(string $url, array $serverdata)
839 $serverdata['poco'] = '';
841 $curlResult = Network::curl($url. '/poco');
842 if (!$curlResult->isSuccess()) {
846 $data = json_decode($curlResult->getBody(), true);
851 if (!empty($data['totalResults'])) {
852 $registeredUsers = $serverdata['registered-users'] ?? 0;
853 $serverdata['registered-users'] = max($data['totalResults'], $registeredUsers);
854 $serverdata['directory-type'] = self::DT_POCO;
855 $serverdata['poco'] = $url . '/poco';
862 * Checks if the given server does have a Mastodon style directory endpoint.
864 * @param string $url URL of the given server
865 * @param array $serverdata array with server data
867 * @return array server data
869 public static function checkMastodonDirectory(string $url, array $serverdata)
871 $curlResult = Network::curl($url . '/api/v1/directory?limit=1');
872 if (!$curlResult->isSuccess()) {
876 $data = json_decode($curlResult->getBody(), true);
881 if (count($data) == 1) {
882 $serverdata['directory-type'] = self::DT_MASTODON;
889 * Detects the version number of a given server when it was a NextCloud installation
891 * @param string $url URL of the given server
892 * @param array $serverdata array with server data
894 * @return array server data
896 private static function detectNextcloud(string $url, array $serverdata)
898 $curlResult = Network::curl($url . '/status.php');
900 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
904 $data = json_decode($curlResult->getBody(), true);
909 if (!empty($data['version'])) {
910 $serverdata['platform'] = 'nextcloud';
911 $serverdata['version'] = $data['version'];
912 $serverdata['network'] = Protocol::ACTIVITYPUB;
919 * Detects data from a given server url if it was a mastodon alike system
921 * @param string $url URL of the given server
922 * @param array $serverdata array with server data
924 * @return array server data
926 private static function detectMastodonAlikes(string $url, array $serverdata)
928 $curlResult = Network::curl($url . '/api/v1/instance');
930 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
934 $data = json_decode($curlResult->getBody(), true);
939 if (!empty($data['version'])) {
940 $serverdata['platform'] = 'mastodon';
941 $serverdata['version'] = $data['version'] ?? '';
942 $serverdata['network'] = Protocol::ACTIVITYPUB;
945 if (!empty($data['title'])) {
946 $serverdata['site_name'] = $data['title'];
949 if (!empty($data['title']) && empty($serverdata['platform']) && empty($serverdata['network'])) {
950 $serverdata['platform'] = 'mastodon';
951 $serverdata['network'] = Protocol::ACTIVITYPUB;
954 if (!empty($data['description'])) {
955 $serverdata['info'] = trim($data['description']);
958 if (!empty($data['stats']['user_count'])) {
959 $serverdata['registered-users'] = $data['stats']['user_count'];
962 if (!empty($serverdata['version']) && preg_match('/.*?\(compatible;\s(.*)\s(.*)\)/ism', $serverdata['version'], $matches)) {
963 $serverdata['platform'] = strtolower($matches[1]);
964 $serverdata['version'] = $matches[2];
967 if (!empty($serverdata['version']) && strstr(strtolower($serverdata['version']), 'pleroma')) {
968 $serverdata['platform'] = 'pleroma';
969 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version']));
972 if (!empty($serverdata['platform']) && strstr($serverdata['platform'], 'pleroma')) {
973 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['platform']));
974 $serverdata['platform'] = 'pleroma';
981 * Detects data from typical Hubzilla endpoints
983 * @param string $url URL of the given server
984 * @param array $serverdata array with server data
986 * @return array server data
988 private static function detectHubzilla(string $url, array $serverdata)
990 $curlResult = Network::curl($url . '/api/statusnet/config.json');
991 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
995 $data = json_decode($curlResult->getBody(), true);
1000 if (!empty($data['site']['name'])) {
1001 $serverdata['site_name'] = $data['site']['name'];
1004 if (!empty($data['site']['platform'])) {
1005 $serverdata['platform'] = strtolower($data['site']['platform']['PLATFORM_NAME']);
1006 $serverdata['version'] = $data['site']['platform']['STD_VERSION'];
1007 $serverdata['network'] = Protocol::ZOT;
1010 if (!empty($data['site']['hubzilla'])) {
1011 $serverdata['platform'] = strtolower($data['site']['hubzilla']['PLATFORM_NAME']);
1012 $serverdata['version'] = $data['site']['hubzilla']['RED_VERSION'];
1013 $serverdata['network'] = Protocol::ZOT;
1016 if (!empty($data['site']['redmatrix'])) {
1017 if (!empty($data['site']['redmatrix']['PLATFORM_NAME'])) {
1018 $serverdata['platform'] = strtolower($data['site']['redmatrix']['PLATFORM_NAME']);
1019 } elseif (!empty($data['site']['redmatrix']['RED_PLATFORM'])) {
1020 $serverdata['platform'] = strtolower($data['site']['redmatrix']['RED_PLATFORM']);
1023 $serverdata['version'] = $data['site']['redmatrix']['RED_VERSION'];
1024 $serverdata['network'] = Protocol::ZOT;
1028 $inviteonly = false;
1031 if (!empty($data['site']['closed'])) {
1032 $closed = self::toBoolean($data['site']['closed']);
1035 if (!empty($data['site']['private'])) {
1036 $private = self::toBoolean($data['site']['private']);
1039 if (!empty($data['site']['inviteonly'])) {
1040 $inviteonly = self::toBoolean($data['site']['inviteonly']);
1043 if (!$closed && !$private and $inviteonly) {
1044 $register_policy = Register::APPROVE;
1045 } elseif (!$closed && !$private) {
1046 $register_policy = Register::OPEN;
1048 $register_policy = Register::CLOSED;
1055 * Converts input value to a boolean value
1057 * @param string|integer $val
1061 private static function toBoolean($val)
1063 if (($val == 'true') || ($val == 1)) {
1065 } elseif (($val == 'false') || ($val == 0)) {
1073 * Detect if the URL belongs to a GNU Social server
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 detectGNUSocial(string $url, array $serverdata)
1082 // Test for GNU Social
1083 $curlResult = Network::curl($url . '/api/gnusocial/version.json');
1084 if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') &&
1085 ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) {
1086 $serverdata['platform'] = 'gnusocial';
1087 // Remove junk that some GNU Social servers return
1088 $serverdata['version'] = str_replace(chr(239) . chr(187) . chr(191), '', $curlResult->getBody());
1089 $serverdata['version'] = str_replace(["\r", "\n", "\t"], '', $serverdata['version']);
1090 $serverdata['version'] = trim($serverdata['version'], '"');
1091 $serverdata['network'] = Protocol::OSTATUS;
1095 // Test for Statusnet
1096 $curlResult = Network::curl($url . '/api/statusnet/version.json');
1097 if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') &&
1098 ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) {
1100 // Remove junk that some GNU Social servers return
1101 $serverdata['version'] = str_replace(chr(239).chr(187).chr(191), '', $curlResult->getBody());
1102 $serverdata['version'] = str_replace(["\r", "\n", "\t"], '', $serverdata['version']);
1103 $serverdata['version'] = trim($serverdata['version'], '"');
1105 if (!empty($serverdata['version']) && strtolower(substr($serverdata['version'], 0, 7)) == 'pleroma') {
1106 $serverdata['platform'] = 'pleroma';
1107 $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version']));
1108 $serverdata['network'] = Protocol::ACTIVITYPUB;
1110 $serverdata['platform'] = 'statusnet';
1111 $serverdata['network'] = Protocol::OSTATUS;
1119 * Detect if the URL belongs to a Friendica server
1121 * @param string $url URL of the given server
1122 * @param array $serverdata array with server data
1124 * @return array server data
1126 private static function detectFriendica(string $url, array $serverdata)
1128 $curlResult = Network::curl($url . '/friendica/json');
1129 if (!$curlResult->isSuccess()) {
1130 $curlResult = Network::curl($url . '/friendika/json');
1133 if (!$curlResult->isSuccess()) {
1137 $data = json_decode($curlResult->getBody(), true);
1138 if (empty($data) || empty($data['version'])) {
1142 $serverdata['network'] = Protocol::DFRN;
1143 $serverdata['version'] = $data['version'];
1145 if (!empty($data['no_scrape_url'])) {
1146 $serverdata['noscrape'] = $data['no_scrape_url'];
1149 if (!empty($data['site_name'])) {
1150 $serverdata['site_name'] = $data['site_name'];
1153 if (!empty($data['info'])) {
1154 $serverdata['info'] = trim($data['info']);
1157 $register_policy = ($data['register_policy'] ?? '') ?: 'REGISTER_CLOSED';
1158 switch ($register_policy) {
1159 case 'REGISTER_OPEN':
1160 $serverdata['register_policy'] = Register::OPEN;
1163 case 'REGISTER_APPROVE':
1164 $serverdata['register_policy'] = Register::APPROVE;
1167 case 'REGISTER_CLOSED':
1168 case 'REGISTER_INVITATION':
1169 $serverdata['register_policy'] = Register::CLOSED;
1172 Logger::info('Register policy is invalid', ['policy' => $register_policy, 'server' => $url]);
1173 $serverdata['register_policy'] = Register::CLOSED;
1177 $serverdata['platform'] = strtolower($data['platform'] ?? '');
1183 * Analyses the landing page of a given server for hints about type and system of that server
1185 * @param object $curlResult result of curl execution
1186 * @param array $serverdata array with server data
1187 * @param string $url Server URL
1189 * @return array server data
1191 private static function analyseRootBody($curlResult, array $serverdata, string $url)
1193 $doc = new DOMDocument();
1194 @$doc->loadHTML($curlResult->getBody());
1195 $xpath = new DOMXPath($doc);
1197 $title = trim(XML::getFirstNodeValue($xpath, '//head/title/text()'));
1198 if (!empty($title)) {
1199 $serverdata['site_name'] = $title;
1202 $list = $xpath->query('//meta[@name]');
1204 foreach ($list as $node) {
1206 if ($node->attributes->length) {
1207 foreach ($node->attributes as $attribute) {
1208 $value = trim($attribute->value);
1209 if (empty($value)) {
1213 $attr[$attribute->name] = $value;
1216 if (empty($attr['name']) || empty($attr['content'])) {
1221 if ($attr['name'] == 'description') {
1222 $serverdata['info'] = $attr['content'];
1225 if ($attr['name'] == 'application-name') {
1226 $serverdata['platform'] = strtolower($attr['content']);
1227 if (in_array($attr['content'], ['Misskey', 'Write.as'])) {
1228 $serverdata['network'] = Protocol::ACTIVITYPUB;
1231 if (($attr['name'] == 'generator') && (empty($serverdata['platform']) || (substr(strtolower($attr['content']), 0, 9) == 'wordpress'))) {
1232 $serverdata['platform'] = strtolower($attr['content']);
1233 $version_part = explode(' ', $attr['content']);
1235 if (count($version_part) == 2) {
1236 if (in_array($version_part[0], ['WordPress'])) {
1237 $serverdata['platform'] = strtolower($version_part[0]);
1238 $serverdata['version'] = $version_part[1];
1240 // We still do need a reliable test if some AP plugin is activated
1241 if (DBA::exists('apcontact', ['baseurl' => $url])) {
1242 $serverdata['network'] = Protocol::ACTIVITYPUB;
1244 $serverdata['network'] = Protocol::FEED;
1247 if (in_array($version_part[0], ['Friendika', 'Friendica'])) {
1248 $serverdata['platform'] = strtolower($version_part[0]);
1249 $serverdata['version'] = $version_part[1];
1250 $serverdata['network'] = Protocol::DFRN;
1256 $list = $xpath->query('//meta[@property]');
1258 foreach ($list as $node) {
1260 if ($node->attributes->length) {
1261 foreach ($node->attributes as $attribute) {
1262 $value = trim($attribute->value);
1263 if (empty($value)) {
1267 $attr[$attribute->name] = $value;
1270 if (empty($attr['property']) || empty($attr['content'])) {
1275 if ($attr['property'] == 'og:site_name') {
1276 $serverdata['site_name'] = $attr['content'];
1279 if ($attr['property'] == 'og:description') {
1280 $serverdata['info'] = $attr['content'];
1283 if ($attr['property'] == 'og:platform') {
1284 $serverdata['platform'] = strtolower($attr['content']);
1286 if (in_array($attr['content'], ['PeerTube'])) {
1287 $serverdata['network'] = Protocol::ACTIVITYPUB;
1291 if ($attr['property'] == 'generator') {
1292 $serverdata['platform'] = strtolower($attr['content']);
1294 if (in_array($attr['content'], ['hubzilla'])) {
1295 // We later check which compatible protocol modules are loaded.
1296 $serverdata['network'] = Protocol::ZOT;
1305 * Analyses the header data of a given server for hints about type and system of that server
1307 * @param object $curlResult result of curl execution
1308 * @param array $serverdata array with server data
1310 * @return array server data
1312 private static function analyseRootHeader($curlResult, array $serverdata)
1314 if ($curlResult->getHeader('server') == 'Mastodon') {
1315 $serverdata['platform'] = 'mastodon';
1316 $serverdata['network'] = $network = Protocol::ACTIVITYPUB;
1317 } elseif ($curlResult->inHeader('x-diaspora-version')) {
1318 $serverdata['platform'] = 'diaspora';
1319 $serverdata['network'] = $network = Protocol::DIASPORA;
1320 $serverdata['version'] = $curlResult->getHeader('x-diaspora-version');
1321 } elseif ($curlResult->inHeader('x-friendica-version')) {
1322 $serverdata['platform'] = 'friendica';
1323 $serverdata['network'] = $network = Protocol::DFRN;
1324 $serverdata['version'] = $curlResult->getHeader('x-friendica-version');
1330 * Test if the body contains valid content
1332 * @param string $body
1335 private static function invalidBody(string $body)
1337 // Currently we only test for a HTML element.
1338 // Possibly we enhance this in the future.
1339 return !strpos($body, '>');
1343 * Update the user directory of a given gserver record
1345 * @param array $gserver gserver record
1347 public static function updateDirectory(array $gserver)
1349 /// @todo Add Mastodon API directory
1351 if (!empty($gserver['poco'])) {
1352 PortableContact::discoverSingleServer($gserver['id']);
1357 * Update GServer entries
1359 public static function discover()
1361 // Update the server list
1362 self::discoverFederation();
1366 $requery_days = intval(DI::config()->get('system', 'poco_requery_days'));
1368 if ($requery_days == 0) {
1372 $last_update = date('c', time() - (60 * 60 * 24 * $requery_days));
1374 $gservers = DBA::p("SELECT `id`, `url`, `nurl`, `network`, `poco`
1376 WHERE `last_contact` >= `last_failure`
1378 AND `last_poco_query` < ?
1379 ORDER BY RAND()", $last_update
1382 while ($gserver = DBA::fetch($gservers)) {
1383 if (!GServer::check($gserver['url'], $gserver['network'])) {
1384 // The server is not reachable? Okay, then we will try it later
1385 $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
1386 DBA::update('gserver', $fields, ['nurl' => $gserver['nurl']]);
1390 Logger::info('Update directory', ['server' => $gserver['url'], 'id' => $gserver['id']]);
1391 Worker::add(PRIORITY_LOW, 'UpdateServerDirectory', $gserver);
1393 if (--$no_of_queries == 0) {
1398 DBA::close($gservers);
1402 * Discover federated servers
1404 private static function discoverFederation()
1406 $last = DI::config()->get('poco', 'last_federation_discovery');
1409 $next = $last + (24 * 60 * 60);
1411 if ($next > time()) {
1416 // Discover federated servers
1417 $curlResult = Network::fetchUrl("http://the-federation.info/pods.json");
1419 if (!empty($curlResult)) {
1420 $servers = json_decode($curlResult, true);
1422 if (!empty($servers['pods'])) {
1423 foreach ($servers['pods'] as $server) {
1424 Worker::add(PRIORITY_LOW, 'UpdateGServer', 'https://' . $server['host']);
1429 // Disvover Mastodon servers
1430 $accesstoken = DI::config()->get('system', 'instances_social_key');
1432 if (!empty($accesstoken)) {
1433 $api = 'https://instances.social/api/1.0/instances/list?count=0';
1434 $header = ['Authorization: Bearer '.$accesstoken];
1435 $curlResult = Network::curl($api, false, ['headers' => $header]);
1437 if ($curlResult->isSuccess()) {
1438 $servers = json_decode($curlResult->getBody(), true);
1440 foreach ($servers['instances'] as $server) {
1441 $url = (is_null($server['https_score']) ? 'http' : 'https') . '://' . $server['name'];
1442 Worker::add(PRIORITY_LOW, 'UpdateGServer', $url);
1447 DI::config()->set('poco', 'last_federation_discovery', time());