. * */ namespace Friendica\Model; use DOMDocument; use DOMXPath; use Friendica\Core\Logger; use Friendica\Core\Protocol; use Friendica\Core\System; use Friendica\Core\Worker; use Friendica\Database\DBA; use Friendica\DI; use Friendica\Module\Register; use Friendica\Network\CurlResult; use Friendica\Protocol\Diaspora; use Friendica\Util\DateTimeFormat; use Friendica\Util\Network; use Friendica\Util\Strings; use Friendica\Util\XML; /** * This class handles GServer related functions */ class GServer { // Directory types const DT_NONE = 0; const DT_POCO = 1; const DT_MASTODON = 2; // Methods to detect server types // Non endpoint specific methods const DETECT_MANUAL = 0; const DETECT_HEADER = 1; const DETECT_BODY = 2; // Implementation specific endpoints const DETECT_FRIENDIKA = 10; const DETECT_FRIENDICA = 11; const DETECT_STATUSNET = 12; const DETECT_GNUSOCIAL = 13; const DETECT_CONFIG_JSON = 14; // Statusnet, GNU Social, Older Hubzilla/Redmatrix const DETECT_SITEINFO_JSON = 15; // Newer Hubzilla const DETECT_MASTODON_API = 16; const DETECT_STATUS_PHP = 17; // Nextcloud // Standardized endpoints const DETECT_STATISTICS_JSON = 100; const DETECT_NODEINFO_1 = 101; const DETECT_NODEINFO_2 = 102; /** * Get the ID for the given server URL * * @param string $url * @param boolean $no_check Don't check if the server hadn't been found * @return int gserver id */ public static function getID(string $url, bool $no_check = false) { if (empty($url)) { return null; } $url = self::cleanURL($url); $gserver = DBA::selectFirst('gserver', ['id'], ['nurl' => Strings::normaliseLink($url)]); if (DBA::isResult($gserver)) { Logger::info('Got ID for URL', ['id' => $gserver['id'], 'url' => $url, 'callstack' => System::callstack(20)]); return $gserver['id']; } if ($no_check || !self::check($url)) { return null; } return self::getID($url, true); } /** * Checks if the given server is reachable * * @param string $profile URL of the given profile * @param string $server URL of the given server (If empty, taken from profile) * @param string $network Network value that is used, when detection failed * @param boolean $force Force an update. * * @return boolean 'true' if server seems vital */ public static function reachable(string $profile, string $server = '', string $network = '', bool $force = false) { if ($server == '') { $contact = Contact::getByURL($profile, null, ['baseurl']); if (!empty($contact['baseurl'])) { $server = $contact['baseurl']; } } if ($server == '') { return true; } return self::check($server, $network, $force); } /** * Decides if a server needs to be updated, based upon several date fields * * @param date $created Creation date of that server entry * @param date $updated When had the server entry be updated * @param date $last_failure Last failure when contacting that server * @param date $last_contact Last time the server had been contacted * * @return boolean Does the server record needs an update? */ public static function updateNeeded($created, $updated, $last_failure, $last_contact) { $now = strtotime(DateTimeFormat::utcNow()); if ($updated > $last_contact) { $contact_time = strtotime($updated); } else { $contact_time = strtotime($last_contact); } $failure_time = strtotime($last_failure); $created_time = strtotime($created); // If there is no "created" time then use the current time if ($created_time <= 0) { $created_time = $now; } // If the last contact was less than 24 hours then don't update if (($now - $contact_time) < (60 * 60 * 24)) { return false; } // If the last failure was less than 24 hours then don't update if (($now - $failure_time) < (60 * 60 * 24)) { return false; } // If the last contact was less than a week ago and the last failure is older than a week then don't update //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) && ($contact_time > $failure_time)) // return false; // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week if ((($now - $contact_time) > (60 * 60 * 24 * 7)) && (($now - $created_time) > (60 * 60 * 24 * 7)) && (($now - $failure_time) < (60 * 60 * 24 * 7))) { return false; } // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month if ((($now - $contact_time) > (60 * 60 * 24 * 30)) && (($now - $created_time) > (60 * 60 * 24 * 30)) && (($now - $failure_time) < (60 * 60 * 24 * 30))) { return false; } return true; } /** * Checks the state of the given server. * * @param string $server_url URL of the given server * @param string $network Network value that is used, when detection failed * @param boolean $force Force an update. * @param boolean $only_nodeinfo Only use nodeinfo for server detection * * @return boolean 'true' if server seems vital */ public static function check(string $server_url, string $network = '', bool $force = false, bool $only_nodeinfo = false) { $server_url = self::cleanURL($server_url); if ($server_url == '') { return false; } $gserver = DBA::selectFirst('gserver', [], ['nurl' => Strings::normaliseLink($server_url)]); if (DBA::isResult($gserver)) { if ($gserver['created'] <= DBA::NULL_DATETIME) { $fields = ['created' => DateTimeFormat::utcNow()]; $condition = ['nurl' => Strings::normaliseLink($server_url)]; DBA::update('gserver', $fields, $condition); } $last_contact = $gserver['last_contact']; $last_failure = $gserver['last_failure']; // See discussion under https://forum.friendi.ca/display/0b6b25a8135aabc37a5a0f5684081633 // It can happen that a zero date is in the database, but storing it again is forbidden. if ($last_contact < DBA::NULL_DATETIME) { $last_contact = DBA::NULL_DATETIME; } if ($last_failure < DBA::NULL_DATETIME) { $last_failure = DBA::NULL_DATETIME; } if (!$force && !self::updateNeeded($gserver['created'], '', $last_failure, $last_contact)) { Logger::info('No update needed', ['server' => $server_url]); return ($last_contact >= $last_failure); } Logger::info('Server is outdated. Start discovery.', ['Server' => $server_url, 'Force' => $force, 'Created' => $gserver['created'], 'Failure' => $last_failure, 'Contact' => $last_contact]); } else { Logger::info('Server is unknown. Start discovery.', ['Server' => $server_url]); } return self::detect($server_url, $network, $only_nodeinfo); } /** * Set failed server status * * @param string $url */ private static function setFailure(string $url) { if (DBA::exists('gserver', ['nurl' => Strings::normaliseLink($url)])) { DBA::update('gserver', ['failed' => true, 'last_failure' => DateTimeFormat::utcNow(), 'detection-method' => null], ['nurl' => Strings::normaliseLink($url)]); Logger::info('Set failed status for existing server', ['url' => $url]); return; } DBA::insert('gserver', ['url' => $url, 'nurl' => Strings::normaliseLink($url), 'network' => Protocol::PHANTOM, 'created' => DateTimeFormat::utcNow(), 'failed' => true, 'last_failure' => DateTimeFormat::utcNow()]); Logger::info('Set failed status for new server', ['url' => $url]); } /** * Remove unwanted content from the given URL * * @param string $url * @return string cleaned URL */ public static function cleanURL(string $url) { $url = trim($url, '/'); $url = str_replace('/index.php', '', $url); $urlparts = parse_url($url); unset($urlparts['user']); unset($urlparts['pass']); unset($urlparts['query']); unset($urlparts['fragment']); return Network::unparseURL($urlparts); } /** * Return the base URL * * @param string $url * @return string base URL */ private static function getBaseURL(string $url) { $urlparts = parse_url(self::cleanURL($url)); unset($urlparts['path']); return Network::unparseURL($urlparts); } /** * Detect server data (type, protocol, version number, ...) * The detected data is then updated or inserted in the gserver table. * * @param string $url URL of the given server * @param string $network Network value that is used, when detection failed * @param boolean $only_nodeinfo Only use nodeinfo for server detection * * @return boolean 'true' if server could be detected */ public static function detect(string $url, string $network = '', bool $only_nodeinfo = false) { Logger::info('Detect server type', ['server' => $url]); $serverdata = ['detection-method' => self::DETECT_MANUAL]; $original_url = $url; // Remove URL content that is not supposed to exist for a server url $url = self::cleanURL($url); // Get base URL $baseurl = self::getBaseURL($url); // If the URL missmatches, then we mark the old entry as failure if ($url != $original_url) { DBA::update('gserver', ['failed' => true, 'last_failure' => DateTimeFormat::utcNow()], ['nurl' => Strings::normaliseLink($original_url)]); } // When a nodeinfo is present, we don't need to dig further $xrd_timeout = DI::config()->get('system', 'xrd_timeout'); $curlResult = DI::httpRequest()->get($url . '/.well-known/nodeinfo', false, ['timeout' => $xrd_timeout]); if ($curlResult->isTimeout()) { self::setFailure($url); return false; } $nodeinfo = self::fetchNodeinfo($url, $curlResult); if ($only_nodeinfo && empty($nodeinfo)) { Logger::info('Invalid nodeinfo in nodeinfo-mode, server is marked as failure', ['url' => $url]); self::setFailure($url); return false; } // When nodeinfo isn't present, we use the older 'statistics.json' endpoint if (empty($nodeinfo)) { $nodeinfo = self::fetchStatistics($url); } // If that didn't work out well, we use some protocol specific endpoints // For Friendica and Zot based networks we have to dive deeper to reveal more details if (empty($nodeinfo['network']) || in_array($nodeinfo['network'], [Protocol::DFRN, Protocol::ZOT])) { if (!empty($nodeinfo['detection-method'])) { $serverdata['detection-method'] = $nodeinfo['detection-method']; } // Fetch the landing page, possibly it reveals some data if (empty($nodeinfo['network'])) { if ($baseurl == $url) { $basedata = $serverdata; } else { $basedata = ['detection-method' => self::DETECT_MANUAL]; } $curlResult = DI::httpRequest()->get($baseurl, false, ['timeout' => $xrd_timeout]); if ($curlResult->isSuccess()) { $basedata = self::analyseRootHeader($curlResult, $basedata); $basedata = self::analyseRootBody($curlResult, $basedata, $baseurl); } if (!$curlResult->isSuccess() || empty($curlResult->getBody()) || self::invalidBody($curlResult->getBody())) { self::setFailure($url); return false; } if ($baseurl == $url) { $serverdata = $basedata; } else { // When the base path doesn't seem to contain a social network we try the complete path. // Most detectable system have to be installed in the root directory. // We checked the base to avoid false positives. $curlResult = DI::httpRequest()->get($url, false, ['timeout' => $xrd_timeout]); if ($curlResult->isSuccess()) { $urldata = self::analyseRootHeader($curlResult, $serverdata); $urldata = self::analyseRootBody($curlResult, $urldata, $url); $comparebase = $basedata; unset($comparebase['info']); unset($comparebase['site_name']); $compareurl = $urldata; unset($compareurl['info']); unset($compareurl['site_name']); // We assume that no one will install the identical system in the root and a subfolder if (!empty(array_diff($comparebase, $compareurl))) { $serverdata = $urldata; } } } } if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ACTIVITYPUB)) { $serverdata = self::detectMastodonAlikes($url, $serverdata); } // All following checks are done for systems that always have got a "host-meta" endpoint. // With this check we don't have to waste time and ressources for dead systems. // Also this hopefully prevents us from receiving abuse messages. if (empty($serverdata['network']) && !self::validHostMeta($url)) { self::setFailure($url); return false; } if (empty($serverdata['network']) || in_array($serverdata['network'], [Protocol::DFRN, Protocol::ACTIVITYPUB])) { $serverdata = self::detectFriendica($url, $serverdata); } // the 'siteinfo.json' is some specific endpoint of Hubzilla and Red if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ZOT)) { $serverdata = self::fetchSiteinfo($url, $serverdata); } // The 'siteinfo.json' doesn't seem to be present on older Hubzilla installations if (empty($serverdata['network'])) { $serverdata = self::detectHubzilla($url, $serverdata); } if (empty($serverdata['network'])) { $serverdata = self::detectNextcloud($url, $serverdata); } if (empty($serverdata['network'])) { $serverdata = self::detectGNUSocial($url, $serverdata); } $serverdata = array_merge($nodeinfo, $serverdata); } else { $serverdata = $nodeinfo; } // Detect the directory type $serverdata['directory-type'] = self::DT_NONE; $serverdata = self::checkPoCo($url, $serverdata); $serverdata = self::checkMastodonDirectory($url, $serverdata); // We can't detect the network type. Possibly it is some system that we don't know yet if (empty($serverdata['network'])) { $serverdata['network'] = Protocol::PHANTOM; } // When we hadn't been able to detect the network type, we use the hint from the parameter if (($serverdata['network'] == Protocol::PHANTOM) && !empty($network)) { $serverdata['network'] = $network; } $serverdata['url'] = $url; $serverdata['nurl'] = Strings::normaliseLink($url); // We take the highest number that we do find $registeredUsers = $serverdata['registered-users'] ?? 0; // On an active server there has to be at least a single user if (($serverdata['network'] != Protocol::PHANTOM) && ($registeredUsers == 0)) { $registeredUsers = 1; } if ($serverdata['network'] == Protocol::PHANTOM) { $serverdata['registered-users'] = $registeredUsers; $serverdata = self::detectNetworkViaContacts($url, $serverdata); } $serverdata['last_contact'] = DateTimeFormat::utcNow(); $serverdata['failed'] = false; $gserver = DBA::selectFirst('gserver', ['network'], ['nurl' => Strings::normaliseLink($url)]); if (!DBA::isResult($gserver)) { $serverdata['created'] = DateTimeFormat::utcNow(); $ret = DBA::insert('gserver', $serverdata); $id = DBA::lastInsertId(); } else { // Don't override the network with 'unknown' when there had been a valid entry before if (($serverdata['network'] == Protocol::PHANTOM) && !empty($gserver['network'])) { unset($serverdata['network']); } $ret = DBA::update('gserver', $serverdata, ['nurl' => $serverdata['nurl']]); $gserver = DBA::selectFirst('gserver', ['id'], ['nurl' => $serverdata['nurl']]); if (DBA::isResult($gserver)) { $id = $gserver['id']; } } if (!empty($serverdata['network']) && !empty($id) && ($serverdata['network'] != Protocol::PHANTOM)) { $apcontacts = DBA::count('apcontact', ['gsid' => $id]); $contacts = DBA::count('contact', ['uid' => 0, 'gsid' => $id]); $max_users = max($apcontacts, $contacts, $registeredUsers); if ($max_users > $registeredUsers) { Logger::info('Update registered users', ['id' => $id, 'url' => $serverdata['nurl'], 'registered-users' => $max_users]); DBA::update('gserver', ['registered-users' => $max_users], ['id' => $id]); } } if (!empty($serverdata['network']) && in_array($serverdata['network'], [Protocol::DFRN, Protocol::DIASPORA])) { self::discoverRelay($url); } return $ret; } /** * Fetch relay data from a given server url * * @param string $server_url address of the server * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function discoverRelay(string $server_url) { Logger::info('Discover relay data', ['server' => $server_url]); $curlResult = DI::httpRequest()->get($server_url . '/.well-known/x-social-relay'); if (!$curlResult->isSuccess()) { return; } $data = json_decode($curlResult->getBody(), true); if (!is_array($data)) { return; } // Sanitize incoming data, see https://github.com/friendica/friendica/issues/8565 $data['subscribe'] = (bool)$data['subscribe'] ?? false; if (!$data['subscribe'] || empty($data['scope']) || !in_array(strtolower($data['scope']), ['all', 'tags'])) { $data['scope'] = ''; $data['subscribe'] = false; $data['tags'] = []; } $gserver = DBA::selectFirst('gserver', ['id', 'relay-subscribe', 'relay-scope'], ['nurl' => Strings::normaliseLink($server_url)]); if (!DBA::isResult($gserver)) { return; } if (($gserver['relay-subscribe'] != $data['subscribe']) || ($gserver['relay-scope'] != $data['scope'])) { $fields = ['relay-subscribe' => $data['subscribe'], 'relay-scope' => $data['scope']]; DBA::update('gserver', $fields, ['id' => $gserver['id']]); } DBA::delete('gserver-tag', ['gserver-id' => $gserver['id']]); if ($data['scope'] == 'tags') { // Avoid duplicates $tags = []; foreach ($data['tags'] as $tag) { $tag = mb_strtolower($tag); if (strlen($tag) < 100) { $tags[$tag] = $tag; } } foreach ($tags as $tag) { DBA::insert('gserver-tag', ['gserver-id' => $gserver['id'], 'tag' => $tag], true); } } // Create or update the relay contact $fields = []; if (isset($data['protocols'])) { if (isset($data['protocols']['diaspora'])) { $fields['network'] = Protocol::DIASPORA; if (isset($data['protocols']['diaspora']['receive'])) { $fields['batch'] = $data['protocols']['diaspora']['receive']; } elseif (is_string($data['protocols']['diaspora'])) { $fields['batch'] = $data['protocols']['diaspora']; } } if (isset($data['protocols']['dfrn'])) { $fields['network'] = Protocol::DFRN; if (isset($data['protocols']['dfrn']['receive'])) { $fields['batch'] = $data['protocols']['dfrn']['receive']; } elseif (is_string($data['protocols']['dfrn'])) { $fields['batch'] = $data['protocols']['dfrn']; } } } Diaspora::setRelayContact($server_url, $fields); } /** * Fetch server data from '/statistics.json' on the given server * * @param string $url URL of the given server * * @return array server data */ private static function fetchStatistics(string $url) { $curlResult = DI::httpRequest()->get($url . '/statistics.json'); if (!$curlResult->isSuccess()) { return []; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return []; } $serverdata = ['detection-method' => self::DETECT_STATISTICS_JSON]; if (!empty($data['version'])) { $serverdata['version'] = $data['version']; // Version numbers on statistics.json are presented with additional info, e.g.: // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191. $serverdata['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $serverdata['version']); } if (!empty($data['name'])) { $serverdata['site_name'] = $data['name']; } if (!empty($data['network'])) { $serverdata['platform'] = strtolower($data['network']); if ($serverdata['platform'] == 'diaspora') { $serverdata['network'] = Protocol::DIASPORA; } elseif ($serverdata['platform'] == 'friendica') { $serverdata['network'] = Protocol::DFRN; } elseif ($serverdata['platform'] == 'hubzilla') { $serverdata['network'] = Protocol::ZOT; } elseif ($serverdata['platform'] == 'redmatrix') { $serverdata['network'] = Protocol::ZOT; } } if (!empty($data['registrations_open'])) { $serverdata['register_policy'] = Register::OPEN; } else { $serverdata['register_policy'] = Register::CLOSED; } return $serverdata; } /** * Detect server type by using the nodeinfo data * * @param string $url address of the server * @param CurlResult $curlResult * @return array Server data * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function fetchNodeinfo(string $url, CurlResult $curlResult) { if (!$curlResult->isSuccess()) { return []; } $nodeinfo = json_decode($curlResult->getBody(), true); if (!is_array($nodeinfo) || empty($nodeinfo['links'])) { return []; } $nodeinfo1_url = ''; $nodeinfo2_url = ''; foreach ($nodeinfo['links'] as $link) { if (!is_array($link) || empty($link['rel']) || empty($link['href'])) { Logger::info('Invalid nodeinfo format', ['url' => $url]); continue; } if ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/1.0') { $nodeinfo1_url = $link['href']; } elseif ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/2.0') { $nodeinfo2_url = $link['href']; } } if ($nodeinfo1_url . $nodeinfo2_url == '') { return []; } $server = []; // When the nodeinfo url isn't on the same host, then there is obviously something wrong if (!empty($nodeinfo2_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo2_url, PHP_URL_HOST))) { $server = self::parseNodeinfo2($nodeinfo2_url); } // When the nodeinfo url isn't on the same host, then there is obviously something wrong if (empty($server) && !empty($nodeinfo1_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo1_url, PHP_URL_HOST))) { $server = self::parseNodeinfo1($nodeinfo1_url); } return $server; } /** * Parses Nodeinfo 1 * * @param string $nodeinfo_url address of the nodeinfo path * @return array Server data * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function parseNodeinfo1(string $nodeinfo_url) { $curlResult = DI::httpRequest()->get($nodeinfo_url); if (!$curlResult->isSuccess()) { return []; } $nodeinfo = json_decode($curlResult->getBody(), true); if (!is_array($nodeinfo)) { return []; } $server = ['detection-method' => self::DETECT_NODEINFO_1, 'register_policy' => Register::CLOSED]; if (!empty($nodeinfo['openRegistrations'])) { $server['register_policy'] = Register::OPEN; } if (is_array($nodeinfo['software'])) { if (!empty($nodeinfo['software']['name'])) { $server['platform'] = strtolower($nodeinfo['software']['name']); } if (!empty($nodeinfo['software']['version'])) { $server['version'] = $nodeinfo['software']['version']; // Version numbers on Nodeinfo are presented with additional info, e.g.: // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191. $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']); } } if (!empty($nodeinfo['metadata']['nodeName'])) { $server['site_name'] = $nodeinfo['metadata']['nodeName']; } if (!empty($nodeinfo['usage']['users']['total'])) { $server['registered-users'] = $nodeinfo['usage']['users']['total']; } if (!empty($nodeinfo['protocols']['inbound']) && is_array($nodeinfo['protocols']['inbound'])) { $protocols = []; foreach ($nodeinfo['protocols']['inbound'] as $protocol) { $protocols[$protocol] = true; } if (!empty($protocols['friendica'])) { $server['network'] = Protocol::DFRN; } elseif (!empty($protocols['activitypub'])) { $server['network'] = Protocol::ACTIVITYPUB; } elseif (!empty($protocols['diaspora'])) { $server['network'] = Protocol::DIASPORA; } elseif (!empty($protocols['ostatus'])) { $server['network'] = Protocol::OSTATUS; } elseif (!empty($protocols['gnusocial'])) { $server['network'] = Protocol::OSTATUS; } elseif (!empty($protocols['zot'])) { $server['network'] = Protocol::ZOT; } } if (empty($server)) { return []; } return $server; } /** * Parses Nodeinfo 2 * * @param string $nodeinfo_url address of the nodeinfo path * @return array Server data * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function parseNodeinfo2(string $nodeinfo_url) { $curlResult = DI::httpRequest()->get($nodeinfo_url); if (!$curlResult->isSuccess()) { return []; } $nodeinfo = json_decode($curlResult->getBody(), true); if (!is_array($nodeinfo)) { return []; } $server = ['detection-method' => self::DETECT_NODEINFO_2, 'register_policy' => Register::CLOSED]; if (!empty($nodeinfo['openRegistrations'])) { $server['register_policy'] = Register::OPEN; } if (is_array($nodeinfo['software'])) { if (!empty($nodeinfo['software']['name'])) { $server['platform'] = strtolower($nodeinfo['software']['name']); } if (!empty($nodeinfo['software']['version'])) { $server['version'] = $nodeinfo['software']['version']; // Version numbers on Nodeinfo are presented with additional info, e.g.: // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191. $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']); } } if (!empty($nodeinfo['metadata']['nodeName'])) { $server['site_name'] = $nodeinfo['metadata']['nodeName']; } if (!empty($nodeinfo['usage']['users']['total'])) { $server['registered-users'] = $nodeinfo['usage']['users']['total']; } if (!empty($nodeinfo['protocols'])) { $protocols = []; foreach ($nodeinfo['protocols'] as $protocol) { $protocols[$protocol] = true; } if (!empty($protocols['dfrn'])) { $server['network'] = Protocol::DFRN; } elseif (!empty($protocols['activitypub'])) { $server['network'] = Protocol::ACTIVITYPUB; } elseif (!empty($protocols['diaspora'])) { $server['network'] = Protocol::DIASPORA; } elseif (!empty($protocols['ostatus'])) { $server['network'] = Protocol::OSTATUS; } elseif (!empty($protocols['gnusocial'])) { $server['network'] = Protocol::OSTATUS; } elseif (!empty($protocols['zot'])) { $server['network'] = Protocol::ZOT; } } if (empty($server)) { return []; } return $server; } /** * Fetch server information from a 'siteinfo.json' file on the given server * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function fetchSiteinfo(string $url, array $serverdata) { $curlResult = DI::httpRequest()->get($url . '/siteinfo.json'); if (!$curlResult->isSuccess()) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) { $serverdata['detection-method'] = self::DETECT_SITEINFO_JSON; } if (!empty($data['url'])) { $serverdata['platform'] = strtolower($data['platform']); $serverdata['version'] = $data['version']; } if (!empty($data['plugins'])) { if (in_array('pubcrawl', $data['plugins'])) { $serverdata['network'] = Protocol::ACTIVITYPUB; } elseif (in_array('diaspora', $data['plugins'])) { $serverdata['network'] = Protocol::DIASPORA; } elseif (in_array('gnusoc', $data['plugins'])) { $serverdata['network'] = Protocol::OSTATUS; } else { $serverdata['network'] = Protocol::ZOT; } } if (!empty($data['site_name'])) { $serverdata['site_name'] = $data['site_name']; } if (!empty($data['channels_total'])) { $serverdata['registered-users'] = $data['channels_total']; } if (!empty($data['register_policy'])) { switch ($data['register_policy']) { case 'REGISTER_OPEN': $serverdata['register_policy'] = Register::OPEN; break; case 'REGISTER_APPROVE': $serverdata['register_policy'] = Register::APPROVE; break; case 'REGISTER_CLOSED': default: $serverdata['register_policy'] = Register::CLOSED; break; } } return $serverdata; } /** * Checks if the server contains a valid host meta file * * @param string $url URL of the given server * * @return boolean 'true' if the server seems to be vital */ private static function validHostMeta(string $url) { $xrd_timeout = DI::config()->get('system', 'xrd_timeout'); $curlResult = DI::httpRequest()->get($url . '/.well-known/host-meta', false, ['timeout' => $xrd_timeout]); if (!$curlResult->isSuccess()) { return false; } $xrd = XML::parseString($curlResult->getBody()); if (!is_object($xrd)) { return false; } $elements = XML::elementToArray($xrd); if (empty($elements) || empty($elements['xrd']) || empty($elements['xrd']['link'])) { return false; } $valid = false; foreach ($elements['xrd']['link'] as $link) { // When there is more than a single "link" element, the array looks slightly different if (!empty($link['@attributes'])) { $link = $link['@attributes']; } if (empty($link['rel']) || empty($link['template'])) { continue; } if ($link['rel'] == 'lrdd') { // When the webfinger host is the same like the system host, it should be ok. $valid = (parse_url($url, PHP_URL_HOST) == parse_url($link['template'], PHP_URL_HOST)); } } return $valid; } /** * Detect the network of the given server via their known contacts * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function detectNetworkViaContacts(string $url, array $serverdata) { $contacts = []; $apcontacts = DBA::select('apcontact', ['url'], ['baseurl' => [$url, $serverdata['nurl']]]); while ($apcontact = DBA::fetch($apcontacts)) { $contacts[Strings::normaliseLink($apcontact['url'])] = $apcontact['url']; } DBA::close($apcontacts); $pcontacts = DBA::select('contact', ['url', 'nurl'], ['uid' => 0, 'baseurl' => [$url, $serverdata['nurl']]]); while ($pcontact = DBA::fetch($pcontacts)) { $contacts[$pcontact['nurl']] = $pcontact['url']; } DBA::close($pcontacts); if (empty($contacts)) { return $serverdata; } foreach ($contacts as $contact) { $probed = Contact::getByURL($contact); if (!empty($probed) && in_array($probed['network'], Protocol::FEDERATED)) { $serverdata['network'] = $probed['network']; break; } } $serverdata['registered-users'] = max($serverdata['registered-users'], count($contacts)); return $serverdata; } /** * Checks if the given server does have a '/poco' endpoint. * This is used for the 'PortableContact' functionality, * which is used by both Friendica and Hubzilla. * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function checkPoCo(string $url, array $serverdata) { $serverdata['poco'] = ''; $curlResult = DI::httpRequest()->get($url . '/poco'); if (!$curlResult->isSuccess()) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } if (!empty($data['totalResults'])) { $registeredUsers = $serverdata['registered-users'] ?? 0; $serverdata['registered-users'] = max($data['totalResults'], $registeredUsers); $serverdata['directory-type'] = self::DT_POCO; $serverdata['poco'] = $url . '/poco'; } return $serverdata; } /** * Checks if the given server does have a Mastodon style directory endpoint. * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ public static function checkMastodonDirectory(string $url, array $serverdata) { $curlResult = DI::httpRequest()->get($url . '/api/v1/directory?limit=1'); if (!$curlResult->isSuccess()) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } if (count($data) == 1) { $serverdata['directory-type'] = self::DT_MASTODON; } return $serverdata; } /** * Detects the version number of a given server when it was a NextCloud installation * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function detectNextcloud(string $url, array $serverdata) { $curlResult = DI::httpRequest()->get($url . '/status.php'); if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } if (!empty($data['version'])) { $serverdata['platform'] = 'nextcloud'; $serverdata['version'] = $data['version']; $serverdata['network'] = Protocol::ACTIVITYPUB; if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) { $serverdata['detection-method'] = self::DETECT_STATUS_PHP; } } return $serverdata; } /** * Detects data from a given server url if it was a mastodon alike system * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function detectMastodonAlikes(string $url, array $serverdata) { $curlResult = DI::httpRequest()->get($url . '/api/v1/instance'); if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) { $serverdata['detection-method'] = self::DETECT_MASTODON_API; } if (!empty($data['version'])) { $serverdata['platform'] = 'mastodon'; $serverdata['version'] = $data['version'] ?? ''; $serverdata['network'] = Protocol::ACTIVITYPUB; } if (!empty($data['title'])) { $serverdata['site_name'] = $data['title']; } if (!empty($data['title']) && empty($serverdata['platform']) && empty($serverdata['network'])) { $serverdata['platform'] = 'mastodon'; $serverdata['network'] = Protocol::ACTIVITYPUB; } if (!empty($data['description'])) { $serverdata['info'] = trim($data['description']); } if (!empty($data['stats']['user_count'])) { $serverdata['registered-users'] = $data['stats']['user_count']; } if (!empty($serverdata['version']) && preg_match('/.*?\(compatible;\s(.*)\s(.*)\)/ism', $serverdata['version'], $matches)) { $serverdata['platform'] = strtolower($matches[1]); $serverdata['version'] = $matches[2]; } if (!empty($serverdata['version']) && strstr(strtolower($serverdata['version']), 'pleroma')) { $serverdata['platform'] = 'pleroma'; $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version'])); } if (!empty($serverdata['platform']) && strstr($serverdata['platform'], 'pleroma')) { $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['platform'])); $serverdata['platform'] = 'pleroma'; } return $serverdata; } /** * Detects data from typical Hubzilla endpoints * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function detectHubzilla(string $url, array $serverdata) { $curlResult = DI::httpRequest()->get($url . '/api/statusnet/config.json'); if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data) || empty($data['site'])) { return $serverdata; } if (!empty($data['site']['name'])) { $serverdata['site_name'] = $data['site']['name']; } if (!empty($data['site']['platform'])) { $serverdata['platform'] = strtolower($data['site']['platform']['PLATFORM_NAME']); $serverdata['version'] = $data['site']['platform']['STD_VERSION']; $serverdata['network'] = Protocol::ZOT; } if (!empty($data['site']['hubzilla'])) { $serverdata['platform'] = strtolower($data['site']['hubzilla']['PLATFORM_NAME']); $serverdata['version'] = $data['site']['hubzilla']['RED_VERSION']; $serverdata['network'] = Protocol::ZOT; } if (!empty($data['site']['redmatrix'])) { if (!empty($data['site']['redmatrix']['PLATFORM_NAME'])) { $serverdata['platform'] = strtolower($data['site']['redmatrix']['PLATFORM_NAME']); } elseif (!empty($data['site']['redmatrix']['RED_PLATFORM'])) { $serverdata['platform'] = strtolower($data['site']['redmatrix']['RED_PLATFORM']); } $serverdata['version'] = $data['site']['redmatrix']['RED_VERSION']; $serverdata['network'] = Protocol::ZOT; } $private = false; $inviteonly = false; $closed = false; if (!empty($data['site']['closed'])) { $closed = self::toBoolean($data['site']['closed']); } if (!empty($data['site']['private'])) { $private = self::toBoolean($data['site']['private']); } if (!empty($data['site']['inviteonly'])) { $inviteonly = self::toBoolean($data['site']['inviteonly']); } if (!$closed && !$private and $inviteonly) { $serverdata['register_policy'] = Register::APPROVE; } elseif (!$closed && !$private) { $serverdata['register_policy'] = Register::OPEN; } else { $serverdata['register_policy'] = Register::CLOSED; } if (!empty($serverdata['network']) && in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) { $serverdata['detection-method'] = self::DETECT_CONFIG_JSON; } return $serverdata; } /** * Converts input value to a boolean value * * @param string|integer $val * * @return boolean */ private static function toBoolean($val) { if (($val == 'true') || ($val == 1)) { return true; } elseif (($val == 'false') || ($val == 0)) { return false; } return $val; } /** * Detect if the URL belongs to a GNU Social server * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function detectGNUSocial(string $url, array $serverdata) { // Test for GNU Social $curlResult = DI::httpRequest()->get($url . '/api/gnusocial/version.json'); if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') && ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) { $serverdata['platform'] = 'gnusocial'; // Remove junk that some GNU Social servers return $serverdata['version'] = str_replace(chr(239) . chr(187) . chr(191), '', $curlResult->getBody()); $serverdata['version'] = str_replace(["\r", "\n", "\t"], '', $serverdata['version']); $serverdata['version'] = trim($serverdata['version'], '"'); $serverdata['network'] = Protocol::OSTATUS; if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) { $serverdata['detection-method'] = self::DETECT_GNUSOCIAL; } return $serverdata; } // Test for Statusnet $curlResult = DI::httpRequest()->get($url . '/api/statusnet/version.json'); if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') && ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) { // Remove junk that some GNU Social servers return $serverdata['version'] = str_replace(chr(239).chr(187).chr(191), '', $curlResult->getBody()); $serverdata['version'] = str_replace(["\r", "\n", "\t"], '', $serverdata['version']); $serverdata['version'] = trim($serverdata['version'], '"'); if (!empty($serverdata['version']) && strtolower(substr($serverdata['version'], 0, 7)) == 'pleroma') { $serverdata['platform'] = 'pleroma'; $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version'])); $serverdata['network'] = Protocol::ACTIVITYPUB; } else { $serverdata['platform'] = 'statusnet'; $serverdata['network'] = Protocol::OSTATUS; } if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) { $serverdata['detection-method'] = self::DETECT_STATUSNET; } } return $serverdata; } /** * Detect if the URL belongs to a Friendica server * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function detectFriendica(string $url, array $serverdata) { $curlResult = DI::httpRequest()->get($url . '/friendica/json'); if (!$curlResult->isSuccess()) { $curlResult = DI::httpRequest()->get($url . '/friendika/json'); $friendika = true; $platform = 'Friendika'; } else { $friendika = false; $platform = 'Friendica'; } if (!$curlResult->isSuccess()) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data) || empty($data['version'])) { return $serverdata; } if (in_array($serverdata['detection-method'], [self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_MANUAL])) { $serverdata['detection-method'] = $friendika ? self::DETECT_FRIENDIKA : self::DETECT_FRIENDICA; } $serverdata['network'] = Protocol::DFRN; $serverdata['version'] = $data['version']; if (!empty($data['no_scrape_url'])) { $serverdata['noscrape'] = $data['no_scrape_url']; } if (!empty($data['site_name'])) { $serverdata['site_name'] = $data['site_name']; } if (!empty($data['info'])) { $serverdata['info'] = trim($data['info']); } $register_policy = ($data['register_policy'] ?? '') ?: 'REGISTER_CLOSED'; switch ($register_policy) { case 'REGISTER_OPEN': $serverdata['register_policy'] = Register::OPEN; break; case 'REGISTER_APPROVE': $serverdata['register_policy'] = Register::APPROVE; break; case 'REGISTER_CLOSED': case 'REGISTER_INVITATION': $serverdata['register_policy'] = Register::CLOSED; break; default: Logger::info('Register policy is invalid', ['policy' => $register_policy, 'server' => $url]); $serverdata['register_policy'] = Register::CLOSED; break; } $serverdata['platform'] = strtolower($data['platform'] ?? $platform); return $serverdata; } /** * Analyses the landing page of a given server for hints about type and system of that server * * @param object $curlResult result of curl execution * @param array $serverdata array with server data * @param string $url Server URL * * @return array server data */ private static function analyseRootBody($curlResult, array $serverdata, string $url) { $doc = new DOMDocument(); @$doc->loadHTML($curlResult->getBody()); $xpath = new DOMXPath($doc); $title = trim(XML::getFirstNodeValue($xpath, '//head/title/text()')); if (!empty($title)) { $serverdata['site_name'] = $title; } $list = $xpath->query('//meta[@name]'); foreach ($list as $node) { $attr = []; if ($node->attributes->length) { foreach ($node->attributes as $attribute) { $value = trim($attribute->value); if (empty($value)) { continue; } $attr[$attribute->name] = $value; } if (empty($attr['name']) || empty($attr['content'])) { continue; } } if ($attr['name'] == 'description') { $serverdata['info'] = $attr['content']; } if (in_array($attr['name'], ['application-name', 'al:android:app_name', 'al:ios:app_name', 'twitter:app:name:googleplay', 'twitter:app:name:iphone', 'twitter:app:name:ipad'])) { $serverdata['platform'] = strtolower($attr['content']); if (in_array($attr['content'], ['Misskey', 'Write.as'])) { $serverdata['network'] = Protocol::ACTIVITYPUB; } } if (($attr['name'] == 'generator') && (empty($serverdata['platform']) || (substr(strtolower($attr['content']), 0, 9) == 'wordpress'))) { $serverdata['platform'] = strtolower($attr['content']); $version_part = explode(' ', $attr['content']); if (count($version_part) == 2) { if (in_array($version_part[0], ['WordPress'])) { $serverdata['platform'] = strtolower($version_part[0]); $serverdata['version'] = $version_part[1]; // We still do need a reliable test if some AP plugin is activated if (DBA::exists('apcontact', ['baseurl' => $url])) { $serverdata['network'] = Protocol::ACTIVITYPUB; } else { $serverdata['network'] = Protocol::FEED; } if ($serverdata['detection-method'] == self::DETECT_MANUAL) { $serverdata['detection-method'] = self::DETECT_BODY; } } if (in_array($version_part[0], ['Friendika', 'Friendica'])) { $serverdata['platform'] = strtolower($version_part[0]); $serverdata['version'] = $version_part[1]; $serverdata['network'] = Protocol::DFRN; } } } } $list = $xpath->query('//meta[@property]'); foreach ($list as $node) { $attr = []; if ($node->attributes->length) { foreach ($node->attributes as $attribute) { $value = trim($attribute->value); if (empty($value)) { continue; } $attr[$attribute->name] = $value; } if (empty($attr['property']) || empty($attr['content'])) { continue; } } if ($attr['property'] == 'og:site_name') { $serverdata['site_name'] = $attr['content']; } if ($attr['property'] == 'og:description') { $serverdata['info'] = $attr['content']; } if ($attr['property'] == 'og:platform') { $serverdata['platform'] = strtolower($attr['content']); if (in_array($attr['content'], ['PeerTube'])) { $serverdata['network'] = Protocol::ACTIVITYPUB; } } if ($attr['property'] == 'generator') { $serverdata['platform'] = strtolower($attr['content']); if (in_array($attr['content'], ['hubzilla'])) { // We later check which compatible protocol modules are loaded. $serverdata['network'] = Protocol::ZOT; } } } if (!empty($serverdata['network']) && ($serverdata['detection-method'] == self::DETECT_MANUAL)) { $serverdata['detection-method'] = self::DETECT_BODY; } return $serverdata; } /** * Analyses the header data of a given server for hints about type and system of that server * * @param object $curlResult result of curl execution * @param array $serverdata array with server data * * @return array server data */ private static function analyseRootHeader($curlResult, array $serverdata) { if ($curlResult->getHeader('server') == 'Mastodon') { $serverdata['platform'] = 'mastodon'; $serverdata['network'] = Protocol::ACTIVITYPUB; } elseif ($curlResult->inHeader('x-diaspora-version')) { $serverdata['platform'] = 'diaspora'; $serverdata['network'] = Protocol::DIASPORA; $serverdata['version'] = $curlResult->getHeader('x-diaspora-version'); } elseif ($curlResult->inHeader('x-friendica-version')) { $serverdata['platform'] = 'friendica'; $serverdata['network'] = Protocol::DFRN; $serverdata['version'] = $curlResult->getHeader('x-friendica-version'); } else { return $serverdata; } if ($serverdata['detection-method'] == self::DETECT_MANUAL) { $serverdata['detection-method'] = self::DETECT_HEADER; } return $serverdata; } /** * Test if the body contains valid content * * @param string $body * @return boolean */ private static function invalidBody(string $body) { // Currently we only test for a HTML element. // Possibly we enhance this in the future. return !strpos($body, '>'); } /** * Update GServer entries */ public static function discover() { // Update the server list self::discoverFederation(); $no_of_queries = 5; $requery_days = intval(DI::config()->get('system', 'poco_requery_days')); if ($requery_days == 0) { $requery_days = 7; } $last_update = date('c', time() - (60 * 60 * 24 * $requery_days)); $gservers = DBA::p("SELECT `id`, `url`, `nurl`, `network`, `poco`, `directory-type` FROM `gserver` WHERE NOT `failed` AND `directory-type` != ? AND `last_poco_query` < ? ORDER BY RAND()", self::DT_NONE, $last_update ); while ($gserver = DBA::fetch($gservers)) { if (!GServer::check($gserver['url'], $gserver['network'])) { // The server is not reachable? Okay, then we will try it later $fields = ['last_poco_query' => DateTimeFormat::utcNow()]; DBA::update('gserver', $fields, ['nurl' => $gserver['nurl']]); continue; } Logger::info('Update peer list', ['server' => $gserver['url'], 'id' => $gserver['id']]); Worker::add(PRIORITY_LOW, 'UpdateServerPeers', $gserver['url']); Logger::info('Update directory', ['server' => $gserver['url'], 'id' => $gserver['id']]); Worker::add(PRIORITY_LOW, 'UpdateServerDirectory', $gserver); $fields = ['last_poco_query' => DateTimeFormat::utcNow()]; DBA::update('gserver', $fields, ['nurl' => $gserver['nurl']]); if (--$no_of_queries == 0) { break; } } DBA::close($gservers); } /** * Discover federated servers */ private static function discoverFederation() { $last = DI::config()->get('poco', 'last_federation_discovery'); if ($last) { $next = $last + (24 * 60 * 60); if ($next > time()) { return; } } // Discover federated servers $protocols = ['activitypub', 'diaspora', 'dfrn', 'ostatus']; foreach ($protocols as $protocol) { $query = '{nodes(protocol:"' . $protocol . '"){host}}'; $curlResult = DI::httpRequest()->fetch('https://the-federation.info/graphql?query=' . urlencode($query)); if (!empty($curlResult)) { $data = json_decode($curlResult, true); if (!empty($data['data']['nodes'])) { foreach ($data['data']['nodes'] as $server) { // Using "only_nodeinfo" since servers that are listed on that page should always have it. Worker::add(PRIORITY_LOW, 'UpdateGServer', 'https://' . $server['host'], true); } } } } // Disvover Mastodon servers $accesstoken = DI::config()->get('system', 'instances_social_key'); if (!empty($accesstoken)) { $api = 'https://instances.social/api/1.0/instances/list?count=0'; $header = ['Authorization: Bearer '.$accesstoken]; $curlResult = DI::httpRequest()->get($api, false, ['headers' => $header]); if ($curlResult->isSuccess()) { $servers = json_decode($curlResult->getBody(), true); foreach ($servers['instances'] as $server) { $url = (is_null($server['https_score']) ? 'http' : 'https') . '://' . $server['name']; Worker::add(PRIORITY_LOW, 'UpdateGServer', $url); } } } DI::config()->set('poco', 'last_federation_discovery', time()); } }