. * */ namespace Friendica\Model; use DOMDocument; use DOMXPath; use Exception; use Friendica\Core\Logger; use Friendica\Core\Protocol; use Friendica\Core\System; use Friendica\Core\Worker; use Friendica\Database\Database; use Friendica\Database\DBA; use Friendica\DI; use Friendica\Module\Register; use Friendica\Network\HTTPClient\Client\HttpClientAccept; use Friendica\Network\HTTPClient\Client\HttpClientOptions; use Friendica\Network\HTTPClient\Capability\ICanHandleHttpResponses; use Friendica\Network\Probe; use Friendica\Protocol\ActivityPub; use Friendica\Protocol\Relay; use Friendica\Util\DateTimeFormat; use Friendica\Util\JsonLD; use Friendica\Util\Network; use Friendica\Util\Strings; use Friendica\Util\XML; use Friendica\Network\HTTPException; use GuzzleHttp\Psr7\Uri; /** * 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; const DETECT_HOST_META = 3; const DETECT_CONTACTS = 4; const DETECT_AP_ACTOR = 5; const DETECT_AP_COLLECTION = 6; const DETECT_UNSPECIFIC = [self::DETECT_MANUAL, self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_HOST_META, self::DETECT_CONTACTS, self::DETECT_AP_ACTOR]; // 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 const DETECT_V1_CONFIG = 18; const DETECT_PUMPIO = 19; // Deprecated const DETECT_SYSTEM_ACTOR = 20; // Mistpark, Osada, Roadhouse, Zap // Standardized endpoints const DETECT_STATISTICS_JSON = 100; const DETECT_NODEINFO_1 = 101; const DETECT_NODEINFO_2 = 102; const DETECT_NODEINFO_210 = 103; /** * Check for the existance of a server and adds it in the background if not existant * * @param string $url * @param boolean $only_nodeinfo * * @return void */ public static function add(string $url, bool $only_nodeinfo = false) { if (self::getID($url, false)) { return; } Worker::add(PRIORITY_LOW, 'UpdateGServer', $url, $only_nodeinfo); } /** * 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|null gserver id or NULL on empty URL or failed check */ public static function getID(string $url, bool $no_check = false): ?int { if (empty($url)) { return null; } $url = self::cleanURL($url); $gserver = DBA::selectFirst('gserver', ['id'], ['nurl' => Strings::normaliseLink($url)]); if (DBA::isResult($gserver)) { Logger::debug('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); } /** * Retrieves all the servers which base domain are matching the provided domain pattern * * The pattern is a simple fnmatch() pattern with ? for single wildcard and * for multiple wildcard * * @param string $pattern * * @return array * * @throws Exception */ public static function listByDomainPattern(string $pattern): array { $likePattern = 'http://' . strtr($pattern, ['_' => '\_', '%' => '\%', '?' => '_', '*' => '%']); // The SUBSTRING_INDEX returns everything before the eventual third /, which effectively trims an // eventual server path and keep only the server domain which we're matching against the pattern. $sql = "SELECT `gserver`.*, COUNT(*) AS `contacts` FROM `gserver` LEFT JOIN `contact` ON `gserver`.`id` = `contact`.`gsid` WHERE SUBSTRING_INDEX(`gserver`.`nurl`, '/', 3) LIKE ? AND NOT `gserver`.`failed` GROUP BY `gserver`.`id`"; $stmt = DI::dba()->p($sql, $likePattern); return DI::dba()->toArray($stmt); } /** * 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 $force = false): bool { if ($server == '') { $contact = Contact::getByURL($profile, null, ['baseurl']); if (!empty($contact['baseurl'])) { $server = $contact['baseurl']; } } if ($server == '') { return true; } return self::check($server, $network, $force); } /** * Calculate the next update day * * @param bool $success * @param string $created * @param string $last_contact * @param bool $undetected * * @return string * * @throws Exception */ public static function getNextUpdateDate(bool $success, string $created = '', string $last_contact = '', bool $undetected = false): string { // On successful contact process check again next week when it is a detected system. // When we haven't detected the system, it could be a static website or a really old system. if ($success) { return DateTimeFormat::utc($undetected ? 'now +1 month' : 'now +7 day'); } $now = strtotime(DateTimeFormat::utcNow()); if ($created > $last_contact) { $contact_time = strtotime($created); } else { $contact_time = strtotime($last_contact); } // If the last contact was less than 6 hours before then try again in 6 hours if (($now - $contact_time) < (60 * 60 * 6)) { return DateTimeFormat::utc('now +6 hour'); } // If the last contact was less than 12 hours before then try again in 12 hours if (($now - $contact_time) < (60 * 60 * 12)) { return DateTimeFormat::utc('now +12 hour'); } // If the last contact was less than 24 hours before then try tomorrow again if (($now - $contact_time) < (60 * 60 * 24)) { return DateTimeFormat::utc('now +1 day'); } // If the last contact was less than a week before then try again in a week if (($now - $contact_time) < (60 * 60 * 24 * 7)) { return DateTimeFormat::utc('now +1 week'); } // If the last contact was less than two weeks before then try again in two week if (($now - $contact_time) < (60 * 60 * 24 * 14)) { return DateTimeFormat::utc('now +2 week'); } // If the last contact was less than a month before then try again in a month if (($now - $contact_time) < (60 * 60 * 24 * 30)) { return DateTimeFormat::utc('now +1 month'); } // The system hadn't been successul contacted for more than a month, so try again in three months return DateTimeFormat::utc('now +3 month'); } /** * 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): bool { $server_url = self::cleanURL($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)]; self::update($fields, $condition); } if (!$force && (strtotime($gserver['next_contact']) > time())) { Logger::info('No update needed', ['server' => $server_url]); return (!$gserver['failed']); } Logger::info('Server is outdated. Start discovery.', ['Server' => $server_url, 'Force' => $force]); } 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 */ public static function setFailure(string $url) { $gserver = DBA::selectFirst('gserver', [], ['nurl' => Strings::normaliseLink($url)]); if (DBA::isResult($gserver)) { $next_update = self::getNextUpdateDate(false, $gserver['created'], $gserver['last_contact']); self::update(['url' => $url, 'failed' => true, 'last_failure' => DateTimeFormat::utcNow(), 'next_contact' => $next_update, 'network' => Protocol::PHANTOM, 'detection-method' => null], ['nurl' => Strings::normaliseLink($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): string { $url = trim($url, '/'); $url = str_replace('/index.php', '', $url); $urlparts = parse_url($url); unset($urlparts['user']); unset($urlparts['pass']); unset($urlparts['query']); unset($urlparts['fragment']); return (string)Uri::fromParts($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): bool { Logger::info('Detect server type', ['server' => $url]); $original_url = $url; // Remove URL content that is not supposed to exist for a server url $url = rtrim(self::cleanURL($url), '/'); if (empty($url)) { Logger::notice('Empty URL.'); return false; } // If the URL missmatches, then we mark the old entry as failure if (!Strings::compareLink($url, $original_url)) { self::setFailure($original_url); if (!self::getID($url, true)) { self::detect($url, $network, $only_nodeinfo); } return false; } $valid_url = Network::isUrlValid($url); if (!$valid_url) { self::setFailure($url); return false; } else { $valid_url = rtrim($valid_url, '/'); } if (!Strings::compareLink($url, $valid_url)) { // We only follow redirects when the path stays the same or the target url has no path. // Some systems have got redirects on their landing page to a single account page. This check handles it. if (((parse_url($url, PHP_URL_HOST) != parse_url($valid_url, PHP_URL_HOST)) && (parse_url($url, PHP_URL_PATH) == parse_url($valid_url, PHP_URL_PATH))) || (((parse_url($url, PHP_URL_HOST) != parse_url($valid_url, PHP_URL_HOST)) || (parse_url($url, PHP_URL_PATH) != parse_url($valid_url, PHP_URL_PATH))) && empty(parse_url($valid_url, PHP_URL_PATH)))) { Logger::debug('Found redirect. Mark old entry as failure', ['old' => $url, 'new' => $valid_url]); self::setFailure($url); if (!self::getID($valid_url, true)) { self::detect($valid_url, $network, $only_nodeinfo); } return false; } if ((parse_url($url, PHP_URL_HOST) != parse_url($valid_url, PHP_URL_HOST)) && (parse_url($url, PHP_URL_PATH) != parse_url($valid_url, PHP_URL_PATH)) && (parse_url($url, PHP_URL_PATH) == '')) { Logger::debug('Found redirect. Mark old entry as failure and redirect to the basepath.', ['old' => $url, 'new' => $valid_url]); $parts = parse_url($valid_url); unset($parts['path']); $valid_url = (string)Uri::fromParts($parts); self::setFailure($url); if (!self::getID($valid_url, true)) { self::detect($valid_url, $network, $only_nodeinfo); } return false; } Logger::debug('Found redirect, but ignore it.', ['old' => $url, 'new' => $valid_url]); } if ((parse_url($url, PHP_URL_HOST) == parse_url($valid_url, PHP_URL_HOST)) && (parse_url($url, PHP_URL_PATH) == parse_url($valid_url, PHP_URL_PATH)) && (parse_url($url, PHP_URL_SCHEME) != parse_url($valid_url, PHP_URL_SCHEME))) { $url = $valid_url; } $in_webroot = empty(parse_url($url, PHP_URL_PATH)); // When a nodeinfo is present, we don't need to dig further $curlResult = DI::httpClient()->get($url . '/.well-known/x-nodeinfo2', HttpClientAccept::JSON); if ($curlResult->isTimeout()) { self::setFailure($url); return false; } $serverdata = self::parseNodeinfo210($curlResult); if (empty($serverdata)) { $curlResult = DI::httpClient()->get($url . '/.well-known/nodeinfo', HttpClientAccept::JSON); $serverdata = self::fetchNodeinfo($url, $curlResult); } if ($only_nodeinfo && empty($serverdata)) { Logger::info('Invalid nodeinfo in nodeinfo-mode, server is marked as failure', ['url' => $url]); self::setFailure($url); return false; } elseif (empty($serverdata)) { $serverdata = ['detection-method' => self::DETECT_MANUAL, 'network' => Protocol::PHANTOM, 'platform' => '', 'version' => '', 'site_name' => '', 'info' => '']; } // When there is no Nodeinfo, then use some protocol specific endpoints if ($serverdata['network'] == Protocol::PHANTOM) { if ($in_webroot) { // Fetch the landing page, possibly it reveals some data $accept = 'application/activity+json,application/ld+json,application/json,*/*;q=0.9'; $curlResult = DI::httpClient()->get($url, $accept); if (!$curlResult->isSuccess() && $curlResult->getReturnCode() == '406') { $curlResult = DI::httpClient()->get($url, HttpClientAccept::HTML); $html_fetched = true; } else { $html_fetched = false; } if ($curlResult->isSuccess()) { $json = json_decode($curlResult->getBody(), true); if (!empty($json) && is_array($json)) { $data = self::fetchDataFromSystemActor($json, $serverdata); $serverdata = $data['server']; $systemactor = $data['actor']; if (!$html_fetched && !in_array($serverdata['detection-method'], [self::DETECT_SYSTEM_ACTOR, self::DETECT_AP_COLLECTION])) { $curlResult = DI::httpClient()->get($url, HttpClientAccept::HTML); } } elseif (!$html_fetched && (strlen($curlResult->getBody()) < 1000)) { $curlResult = DI::httpClient()->get($url, HttpClientAccept::HTML); } if ($serverdata['detection-method'] != self::DETECT_SYSTEM_ACTOR) { $serverdata = self::analyseRootHeader($curlResult, $serverdata); $serverdata = self::analyseRootBody($curlResult, $serverdata); } } if (!$curlResult->isSuccess() || empty($curlResult->getBody())) { self::setFailure($url); return false; } if (($serverdata['network'] == Protocol::PHANTOM) || in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata = self::detectMastodonAlikes($url, $serverdata); } } // All following checks are done for systems that always have got a "host-meta" endpoint. // With this check we don't have to waste time and ressources for dead systems. // Also this hopefully prevents us from receiving abuse messages. if (($serverdata['network'] == Protocol::PHANTOM) || in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $validHostMeta = self::validHostMeta($url); } else { $validHostMeta = false; } if ($validHostMeta) { if (in_array($serverdata['detection-method'], [self::DETECT_MANUAL, self::DETECT_HEADER, self::DETECT_BODY])) { $serverdata['detection-method'] = self::DETECT_HOST_META; } if (($serverdata['network'] == Protocol::PHANTOM) || in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata = self::detectFriendica($url, $serverdata); } // The following systems have to be installed in the root directory. if ($in_webroot) { // the 'siteinfo.json' is some specific endpoint of Hubzilla and Red if (($serverdata['network'] == Protocol::PHANTOM) || in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata = self::fetchSiteinfo($url, $serverdata); } // The 'siteinfo.json' doesn't seem to be present on older Hubzilla installations, so we check other endpoints as well if (($serverdata['network'] == Protocol::PHANTOM) || in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata = self::detectHubzilla($url, $serverdata); } if (($serverdata['network'] == Protocol::PHANTOM) || in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata = self::detectPeertube($url, $serverdata); } if (($serverdata['network'] == Protocol::PHANTOM) || in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata = self::detectGNUSocial($url, $serverdata); } } } elseif (in_array($serverdata['platform'], ['friendica', 'friendika']) && in_array($serverdata['detection-method'], array_merge(self::DETECT_UNSPECIFIC, [self::DETECT_SYSTEM_ACTOR]))) { $serverdata = self::detectFriendica($url, $serverdata); } if (($serverdata['network'] == Protocol::PHANTOM) || in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata = self::detectNextcloud($url, $serverdata, $validHostMeta); } // When nodeinfo isn't present, we use the older 'statistics.json' endpoint // Since this endpoint is only rarely used, we query it at a later time if (in_array($serverdata['detection-method'], array_merge(self::DETECT_UNSPECIFIC, [self::DETECT_FRIENDICA, self::DETECT_CONFIG_JSON]))) { $serverdata = self::fetchStatistics($url, $serverdata); } } // When we hadn't been able to detect the network type, we use the hint from the parameter if (($serverdata['network'] == Protocol::PHANTOM) && !empty($network)) { $serverdata['network'] = $network; } // Most servers aren't installed in a subdirectory, so we declare this entry as failed if (($serverdata['network'] == Protocol::PHANTOM) && !empty(parse_url($url, PHP_URL_PATH)) && in_array($serverdata['detection-method'], [self::DETECT_MANUAL])) { self::setFailure($url); return false; } $serverdata['url'] = $url; $serverdata['nurl'] = Strings::normaliseLink($url); // We have to prevent an endless loop here. // When a server is new, then there is no gserver entry yet. // But in "detectNetworkViaContacts" it could happen that a contact is updated, // and this can call this function here as well. if (self::getID($url, true) && (in_array($serverdata['network'], [Protocol::PHANTOM, Protocol::FEED]) || in_array($serverdata['detection-method'], [self::DETECT_MANUAL, self::DETECT_HEADER, self::DETECT_BODY, self::DETECT_HOST_META]))) { $serverdata = self::detectNetworkViaContacts($url, $serverdata); } // Detect the directory type $serverdata['directory-type'] = self::DT_NONE; if (in_array($serverdata['network'], Protocol::FEDERATED)) { $serverdata = self::checkMastodonDirectory($url, $serverdata); if ($serverdata['directory-type'] == self::DT_NONE) { $serverdata = self::checkPoCo($url, $serverdata); } } if ($serverdata['network'] == Protocol::ACTIVITYPUB) { $serverdata = self::fetchWeeklyUsage($url, $serverdata); } $serverdata['registered-users'] = $serverdata['registered-users'] ?? 0; // Numbers above a reasonable value (10 millions) are ignored if ($serverdata['registered-users'] > 10000000) { $serverdata['registered-users'] = 0; } // On an active server there has to be at least a single user if (!in_array($serverdata['network'], [Protocol::PHANTOM, Protocol::FEED]) && ($serverdata['registered-users'] <= 0)) { $serverdata['registered-users'] = 1; } elseif (in_array($serverdata['network'], [Protocol::PHANTOM, Protocol::FEED])) { $serverdata['registered-users'] = 0; } $serverdata['next_contact'] = self::getNextUpdateDate(true, '', '', in_array($serverdata['network'], [Protocol::PHANTOM, Protocol::FEED])); $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 { $ret = self::update($serverdata, ['nurl' => $serverdata['nurl']]); $gserver = DBA::selectFirst('gserver', ['id'], ['nurl' => $serverdata['nurl']]); if (DBA::isResult($gserver)) { $id = $gserver['id']; } } // Count the number of known contacts from this server if (!empty($id) && !in_array($serverdata['network'], [Protocol::PHANTOM, Protocol::FEED])) { $apcontacts = DBA::count('apcontact', ['gsid' => $id]); $contacts = DBA::count('contact', ['uid' => 0, 'gsid' => $id, 'failed' => false]); $max_users = max($apcontacts, $contacts); if ($max_users > $serverdata['registered-users']) { Logger::info('Update registered users', ['id' => $id, 'url' => $serverdata['nurl'], 'registered-users' => $max_users]); self::update(['registered-users' => $max_users], ['id' => $id]); } if (empty($serverdata['active-month-users'])) { $contacts = DBA::count('contact', ["`uid` = ? AND `gsid` = ? AND NOT `failed` AND `last-item` > ?", 0, $id, DateTimeFormat::utc('now - 30 days')]); if ($contacts > 0) { Logger::info('Update monthly users', ['id' => $id, 'url' => $serverdata['nurl'], 'monthly-users' => $contacts]); self::update(['active-month-users' => $contacts], ['id' => $id]); } } if (empty($serverdata['active-halfyear-users'])) { $contacts = DBA::count('contact', ["`uid` = ? AND `gsid` = ? AND NOT `failed` AND `last-item` > ?", 0, $id, DateTimeFormat::utc('now - 180 days')]); if ($contacts > 0) { Logger::info('Update halfyear users', ['id' => $id, 'url' => $serverdata['nurl'], 'halfyear-users' => $contacts]); self::update(['active-halfyear-users' => $contacts], ['id' => $id]); } } } if (in_array($serverdata['network'], [Protocol::DFRN, Protocol::DIASPORA])) { self::discoverRelay($url); } if (!empty($systemactor)) { $contact = Contact::getByURL($systemactor, true, ['gsid', 'baseurl', 'id', 'network', 'url', 'name']); Logger::debug('Fetched system actor', ['url' => $url, 'gsid' => $id, 'contact' => $contact]); } return $ret; } /** * Fetch relay data from a given server url * * @param string $server_url address of the server * * @return void * * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function discoverRelay(string $server_url) { Logger::info('Discover relay data', ['server' => $server_url]); $curlResult = DI::httpClient()->get($server_url . '/.well-known/x-social-relay', HttpClientAccept::JSON); 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'] = []; } $gserver = DBA::selectFirst('gserver', ['id', 'url', 'network', 'relay-subscribe', 'relay-scope'], ['nurl' => Strings::normaliseLink($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' => $data['scope']]; self::update($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], Database::INSERT_IGNORE); } } // 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'] = $data['protocols']['dfrn']; } } if (isset($data['protocols']['activitypub'])) { $fields['network'] = Protocol::ACTIVITYPUB; if (!empty($data['protocols']['activitypub']['actor'])) { $fields['url'] = $data['protocols']['activitypub']['actor']; } if (!empty($data['protocols']['activitypub']['receive'])) { $fields['batch'] = $data['protocols']['activitypub']['receive']; } } } Logger::info('Discovery ended', ['server' => $server_url, 'data' => $fields]); Relay::updateContact($gserver, $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, array $serverdata): array { $curlResult = DI::httpClient()->get($url . '/statistics.json', HttpClientAccept::JSON); if (!$curlResult->isSuccess()) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } // Some AP enabled systems return activity data that we don't expect here. if (strpos($curlResult->getContentType(), 'application/activity+json') !== false) { return $serverdata; } $valid = false; $old_serverdata = $serverdata; $serverdata['detection-method'] = self::DETECT_STATISTICS_JSON; if (!empty($data['version'])) { $valid = true; $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'])) { $valid = true; $serverdata['site_name'] = $data['name']; } if (!empty($data['network'])) { $valid = true; $serverdata['platform'] = strtolower($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['total_users'])) { $valid = true; $serverdata['registered-users'] = max($data['total_users'], 1); } if (!empty($data['active_users_monthly'])) { $valid = true; $serverdata['active-month-users'] = max($data['active_users_monthly'], 0); } if (!empty($data['active_users_halfyear'])) { $valid = true; $serverdata['active-halfyear-users'] = max($data['active_users_halfyear'], 0); } if (!empty($data['local_posts'])) { $valid = true; $serverdata['local-posts'] = max($data['local_posts'], 0); } if (!empty($data['registrations_open'])) { $serverdata['register_policy'] = Register::OPEN; } else { $serverdata['register_policy'] = Register::CLOSED; } if (!$valid) { return $old_serverdata; } return $serverdata; } /** * Detect server type by using the nodeinfo data * * @param string $url address of the server * @param ICanHandleHttpResponses $httpResult * * @return array Server data * * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function fetchNodeinfo(string $url, ICanHandleHttpResponses $httpResult): array { if (!$httpResult->isSuccess()) { return []; } $nodeinfo = json_decode($httpResult->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 []; } $server = []; if (!empty($nodeinfo2_url)) { $server = self::parseNodeinfo2($nodeinfo2_url); } if (empty($server) && !empty($nodeinfo1_url)) { $server = self::parseNodeinfo1($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): array { $curlResult = DI::httpClient()->get($nodeinfo_url, HttpClientAccept::JSON); 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'])) { $server['registered-users'] = max($nodeinfo['usage']['users']['total'], 1); } if (!empty($nodeinfo['usage']['users']['activeMonth'])) { $server['active-month-users'] = max($nodeinfo['usage']['users']['activeMonth'], 0); } if (!empty($nodeinfo['usage']['users']['activeHalfyear'])) { $server['active-halfyear-users'] = max($nodeinfo['usage']['users']['activeHalfyear'], 0); } if (!empty($nodeinfo['usage']['localPosts'])) { $server['local-posts'] = max($nodeinfo['usage']['localPosts'], 0); } if (!empty($nodeinfo['usage']['localComments'])) { $server['local-comments'] = max($nodeinfo['usage']['localComments'], 0); } 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 []; } if (empty($server['network'])) { $server['network'] = Protocol::PHANTOM; } return $server; } /** * Parses Nodeinfo 2 * * @see https://git.feneas.org/jaywink/nodeinfo2 * * @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): array { $curlResult = DI::httpClient()->get($nodeinfo_url, HttpClientAccept::JSON); if (!$curlResult->isSuccess()) { return []; } $nodeinfo = json_decode($curlResult->getBody(), true); if (!is_array($nodeinfo)) { return []; } $server = [ 'detection-method' => self::DETECT_NODEINFO_2, 'register_policy' => Register::CLOSED, 'platform' => 'unknown', ]; if (!empty($nodeinfo['openRegistrations'])) { $server['register_policy'] = Register::OPEN; } if (!empty($nodeinfo['software'])) { if (isset($nodeinfo['software']['name'])) { $server['platform'] = strtolower($nodeinfo['software']['name']); } if (!empty($nodeinfo['software']['version']) && isset($server['platform'])) { $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', $server['version']); // qoto advertises itself as Mastodon if (($server['platform'] == 'mastodon') && substr($nodeinfo['software']['version'], -5) == '-qoto') { $server['platform'] = 'qoto'; } } } if (!empty($nodeinfo['metadata']['nodeName'])) { $server['site_name'] = $nodeinfo['metadata']['nodeName']; } if (!empty($nodeinfo['usage']['users']['total'])) { $server['registered-users'] = max($nodeinfo['usage']['users']['total'], 1); } if (!empty($nodeinfo['usage']['users']['activeMonth'])) { $server['active-month-users'] = max($nodeinfo['usage']['users']['activeMonth'], 0); } if (!empty($nodeinfo['usage']['users']['activeHalfyear'])) { $server['active-halfyear-users'] = max($nodeinfo['usage']['users']['activeHalfyear'], 0); } if (!empty($nodeinfo['usage']['localPosts'])) { $server['local-posts'] = max($nodeinfo['usage']['localPosts'], 0); } if (!empty($nodeinfo['usage']['localComments'])) { $server['local-comments'] = max($nodeinfo['usage']['localComments'], 0); } if (!empty($nodeinfo['protocols'])) { $protocols = []; foreach ($nodeinfo['protocols'] as $protocol) { if (is_string($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 []; } if (empty($server['network'])) { $server['network'] = Protocol::PHANTOM; } return $server; } /** * Parses NodeInfo2 protocol 1.0 * * @see https://github.com/jaywink/nodeinfo2/blob/master/PROTOCOL.md * * @param string $nodeinfo_url address of the nodeinfo path * * @return array Server data * * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function parseNodeinfo210(ICanHandleHttpResponses $httpResult): array { if (!$httpResult->isSuccess()) { return []; } $nodeinfo = json_decode($httpResult->getBody(), true); if (!is_array($nodeinfo)) { return []; } $server = ['detection-method' => self::DETECT_NODEINFO_210, 'register_policy' => Register::CLOSED]; if (!empty($nodeinfo['openRegistrations'])) { $server['register_policy'] = Register::OPEN; } if (!empty($nodeinfo['server'])) { if (!empty($nodeinfo['server']['software'])) { $server['platform'] = strtolower($nodeinfo['server']['software']); } if (!empty($nodeinfo['server']['version'])) { $server['version'] = $nodeinfo['server']['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['server']['name'])) { $server['site_name'] = $nodeinfo['server']['name']; } } if (!empty($nodeinfo['usage']['users']['total'])) { $server['registered-users'] = max($nodeinfo['usage']['users']['total'], 1); } if (!empty($nodeinfo['usage']['users']['activeMonth'])) { $server['active-month-users'] = max($nodeinfo['usage']['users']['activeMonth'], 0); } if (!empty($nodeinfo['usage']['users']['activeHalfyear'])) { $server['active-halfyear-users'] = max($nodeinfo['usage']['users']['activeHalfyear'], 0); } if (!empty($nodeinfo['usage']['localPosts'])) { $server['local-posts'] = max($nodeinfo['usage']['localPosts'], 0); } if (!empty($nodeinfo['usage']['localComments'])) { $server['local-comments'] = max($nodeinfo['usage']['localComments'], 0); } if (!empty($nodeinfo['protocols'])) { $protocols = []; foreach ($nodeinfo['protocols'] as $protocol) { if (is_string($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) || empty($server['platform'])) { return []; } if (empty($server['network'])) { $server['network'] = Protocol::PHANTOM; } 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): array { $curlResult = DI::httpClient()->get($url . '/siteinfo.json', HttpClientAccept::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_UNSPECIFIC)) { $serverdata['detection-method'] = self::DETECT_SITEINFO_JSON; } if (!empty($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'])) { $serverdata['registered-users'] = max($data['channels_total'], 1); } if (!empty($data['channels_active_monthly'])) { $serverdata['active-month-users'] = max($data['channels_active_monthly'], 0); } if (!empty($data['channels_active_halfyear'])) { $serverdata['active-halfyear-users'] = max($data['channels_active_halfyear'], 0); } if (!empty($data['local_posts'])) { $serverdata['local-posts'] = max($data['local_posts'], 0); } if (!empty($data['local_comments'])) { $serverdata['local-comments'] = max($data['local_comments'], 0); } 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; } /** * Fetches server data via an ActivityPub account with url of that server * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data * * @throws Exception */ private static function fetchDataFromSystemActor(array $data, array $serverdata): array { if (empty($data)) { return ['server' => $serverdata, 'actor' => '']; } $actor = JsonLD::compact($data, false); if (in_array(JsonLD::fetchElement($actor, '@type'), ActivityPub\Receiver::ACCOUNT_TYPES)) { $serverdata['network'] = Protocol::ACTIVITYPUB; $serverdata['site_name'] = JsonLD::fetchElement($actor, 'as:name', '@value'); $serverdata['info'] = JsonLD::fetchElement($actor, 'as:summary', '@value'); if (!empty($actor['as:generator'])) { $generator = explode(' ', JsonLD::fetchElement($actor['as:generator'], 'as:name', '@value')); $serverdata['platform'] = strtolower(array_shift($generator)); $serverdata['detection-method'] = self::DETECT_SYSTEM_ACTOR; } else { $serverdata['detection-method'] = self::DETECT_AP_ACTOR; } return ['server' => $serverdata, 'actor' => $actor['@id']]; } elseif ((JsonLD::fetchElement($actor, '@type') == 'as:Collection')) { // By now only Ktistec seems to provide collections this way $serverdata['platform'] = 'ktistec'; $serverdata['network'] = Protocol::ACTIVITYPUB; $serverdata['detection-method'] = self::DETECT_AP_COLLECTION; $actors = JsonLD::fetchElementArray($actor, 'as:items'); if (!empty($actors) && !empty($actors[0]['@id'])) { $actor_url = $actor['@id'] . $actors[0]['@id']; } else { $actor_url = ''; } return ['server' => $serverdata, 'actor' => $actor_url]; } return ['server' => $serverdata, 'actor' => '']; } /** * 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): bool { $xrd_timeout = DI::config()->get('system', 'xrd_timeout'); $curlResult = DI::httpClient()->get($url . '/.well-known/host-meta', HttpClientAccept::XRD_XML, [HttpClientOptions::TIMEOUT => $xrd_timeout]); if (!$curlResult->isSuccess()) { return false; } $xrd = XML::parseString($curlResult->getBody(), true); 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): array { $contacts = []; $nurl = Strings::normaliseLink($url); $apcontacts = DBA::select('apcontact', ['url'], ['baseurl' => [$url, $nurl]]); while ($apcontact = DBA::fetch($apcontacts)) { $contacts[Strings::normaliseLink($apcontact['url'])] = $apcontact['url']; } DBA::close($apcontacts); $pcontacts = DBA::select('contact', ['url', 'nurl'], ['uid' => 0, 'baseurl' => [$url, $nurl]]); while ($pcontact = DBA::fetch($pcontacts)) { $contacts[$pcontact['nurl']] = $pcontact['url']; } DBA::close($pcontacts); if (empty($contacts)) { return $serverdata; } $time = time(); foreach ($contacts as $contact) { // Endlosschleife verhindern wegen gsid! $data = Probe::uri($contact); if (in_array($data['network'], Protocol::FEDERATED)) { $serverdata['network'] = $data['network']; if (in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata['detection-method'] = self::DETECT_CONTACTS; } break; } elseif ((time() - $time) > 10) { // To reduce the stress on remote systems we probe a maximum of 10 seconds break; } } 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): array { $serverdata['poco'] = ''; $curlResult = DI::httpClient()->get($url . '/poco', HttpClientAccept::JSON); 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, 1); $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): array { $curlResult = DI::httpClient()->get($url . '/api/v1/directory?limit=1', HttpClientAccept::JSON); 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 Peertube via their known endpoint * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function detectPeertube(string $url, array $serverdata): array { $curlResult = DI::httpClient()->get($url . '/api/v1/config', HttpClientAccept::JSON); if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } if (!empty($data['instance']) && !empty($data['serverVersion'])) { $serverdata['platform'] = 'peertube'; $serverdata['version'] = $data['serverVersion']; $serverdata['network'] = Protocol::ACTIVITYPUB; if (!empty($data['instance']['name'])) { $serverdata['site_name'] = $data['instance']['name']; } if (!empty($data['instance']['shortDescription'])) { $serverdata['info'] = $data['instance']['shortDescription']; } if (!empty($data['signup'])) { if (!empty($data['signup']['allowed'])) { $serverdata['register_policy'] = Register::OPEN; } } if (in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata['detection-method'] = self::DETECT_V1_CONFIG; } } 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 * @param bool $validHostMeta * * @return array server data */ private static function detectNextcloud(string $url, array $serverdata, bool $validHostMeta): array { $curlResult = DI::httpClient()->get($url . '/status.php', HttpClientAccept::JSON); 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'] = $data['version']; if ($validHostMeta) { $serverdata['network'] = Protocol::ACTIVITYPUB; } if (in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata['detection-method'] = self::DETECT_STATUS_PHP; } } return $serverdata; } /** * Fetches weekly usage data * * @param string $url URL of the given server * @param array $serverdata array with server data * * @return array server data */ private static function fetchWeeklyUsage(string $url, array $serverdata): array { $curlResult = DI::httpClient()->get($url . '/api/v1/instance/activity', HttpClientAccept::JSON); if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } $current_week = []; foreach ($data as $week) { // Use only data from a full week if (empty($week['week']) || (time() - $week['week']) < 7 * 24 * 60 * 60) { continue; } // Most likely the data is sorted correctly. But we better are safe than sorry if (empty($current_week['week']) || ($current_week['week'] < $week['week'])) { $current_week = $week; } } if (!empty($current_week['logins'])) { $serverdata['active-week-users'] = max($current_week['logins'], 0); } 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): array { $curlResult = DI::httpClient()->get($url . '/api/v1/instance', HttpClientAccept::JSON); if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) { return $serverdata; } $data = json_decode($curlResult->getBody(), true); if (empty($data)) { return $serverdata; } $valid = false; if (!empty($data['version'])) { $serverdata['platform'] = 'mastodon'; $serverdata['version'] = $data['version'] ?? ''; $serverdata['network'] = Protocol::ACTIVITYPUB; $valid = true; } if (!empty($data['title'])) { $serverdata['site_name'] = $data['title']; } if (!empty($data['title']) && empty($serverdata['platform']) && ($serverdata['network'] == Protocol::PHANTOM)) { $serverdata['platform'] = 'mastodon'; $serverdata['network'] = Protocol::ACTIVITYPUB; $valid = true; } if (!empty($data['description'])) { $serverdata['info'] = trim($data['description']); } if (!empty($data['stats']['user_count'])) { $serverdata['registered-users'] = max($data['stats']['user_count'], 1); } if (!empty($serverdata['version']) && preg_match('/.*?\(compatible;\s(.*)\s(.*)\)/ism', $serverdata['version'], $matches)) { $serverdata['platform'] = strtolower($matches[1]); $serverdata['version'] = $matches[2]; $valid = true; } if (!empty($serverdata['version']) && strstr(strtolower($serverdata['version']), 'pleroma')) { $serverdata['platform'] = 'pleroma'; $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['version'])); $valid = true; } if (!empty($serverdata['platform']) && strstr($serverdata['platform'], 'pleroma')) { $serverdata['version'] = trim(str_ireplace('pleroma', '', $serverdata['platform'])); $serverdata['platform'] = 'pleroma'; $valid = true; } if ($valid && in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $serverdata['detection-method'] = self::DETECT_MASTODON_API; } 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): array { $curlResult = DI::httpClient()->get($url . '/api/statusnet/config.json', HttpClientAccept::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 { $serverdata['register_policy'] = Register::CLOSED; } if (($serverdata['network'] != Protocol::PHANTOM) && in_array($serverdata['detection-method'], self::DETECT_UNSPECIFIC)) { $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): bool { 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): array { // Test for GNU Social $curlResult = DI::httpClient()->get($url . '/api/gnusocial/version.json', HttpClientAccept::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_UNSPECIFIC)) { $serverdata['detection-method'] = self::DETECT_GNUSOCIAL; } return $serverdata; } // Test for Statusnet $curlResult = DI::httpClient()->get($url . '/api/statusnet/version.json', HttpClientAccept::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_UNSPECIFIC)) { $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): array { // There is a bug in some versions of Friendica that will return an ActivityStream actor when the content type "application/json" is requested. // Because of this me must not use ACCEPT_JSON here. $curlResult = DI::httpClient()->get($url . '/friendica/json'); if (!$curlResult->isSuccess()) { $curlResult = DI::httpClient()->get($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_UNSPECIFIC)) { $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 $serverdata array with server data * * @return array server data */ private static function analyseRootBody($curlResult, array $serverdata): array { if (empty($curlResult->getBody())) { return $serverdata; } if (file_exists(__DIR__ . '/../../static/platforms.config.php')) { require __DIR__ . '/../../static/platforms.config.php'; } else { throw new HTTPException\InternalServerErrorException('Invalid platform file'); } $platforms = array_merge($ap_platforms, $dfrn_platforms, $zap_platforms, $platforms); $doc = new DOMDocument(); @$doc->loadHTML($curlResult->getBody()); $xpath = new DOMXPath($doc); $assigned = false; // We can only detect honk via some HTML element on their page if ($xpath->query('//div[@id="honksonpage"]')->count() == 1) { $serverdata['platform'] = 'honk'; $serverdata['network'] = Protocol::ACTIVITYPUB; $assigned = true; } $title = trim(XML::getFirstNodeValue($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', 'generator'])) { $platform = str_ireplace(array_keys($platforms), array_values($platforms), $attr['content']); $platform = str_replace('/', ' ', $platform); $platform_parts = explode(' ', $platform); if ((count($platform_parts) >= 2) && in_array(strtolower($platform_parts[0]), array_values($platforms))) { $platform = $platform_parts[0]; $serverdata['version'] = $platform_parts[1]; } if (in_array($platform, array_values($dfrn_platforms))) { $serverdata['network'] = Protocol::DFRN; } elseif (in_array($platform, array_values($ap_platforms))) { $serverdata['network'] = Protocol::ACTIVITYPUB; } elseif (in_array($platform, array_values($zap_platforms))) { $serverdata['network'] = Protocol::ZOT; } if (in_array($platform, array_values($platforms))) { $serverdata['platform'] = $platform; $assigned = true; } } } $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'] = $attr['content']; } if (in_array($attr['property'], ['og:platform', 'generator'])) { if (in_array($attr['content'], array_keys($platforms))) { $serverdata['platform'] = $platforms[$attr['content']]; $assigned = true; } if (in_array($attr['content'], array_keys($ap_platforms))) { $serverdata['network'] = Protocol::ACTIVITYPUB; } elseif (in_array($attr['content'], array_values($zap_platforms))) { $serverdata['network'] = Protocol::ZOT; } } } $list = $xpath->query('//link[@rel="me"]'); foreach ($list as $node) { foreach ($node->attributes as $attribute) { if (parse_url(trim($attribute->value), PHP_URL_HOST) == 'micro.blog') { $serverdata['version'] = trim($serverdata['platform'] . ' ' . $serverdata['version']); $serverdata['platform'] = 'microblog'; $serverdata['network'] = Protocol::ACTIVITYPUB; $assigned = true; } } } if ($serverdata['platform'] != 'microblog') { $list = $xpath->query('//link[@rel="micropub"]'); foreach ($list as $node) { foreach ($node->attributes as $attribute) { if (trim($attribute->value) == 'https://micro.blog/micropub') { $serverdata['version'] = trim($serverdata['platform'] . ' ' . $serverdata['version']); $serverdata['platform'] = 'microblog'; $serverdata['network'] = Protocol::ACTIVITYPUB; $assigned = true; } } } } if ($assigned && in_array($serverdata['detection-method'], [self::DETECT_MANUAL, self::DETECT_HEADER])) { $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 $serverdata): array { if ($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'] = $curlResult->getHeader('x-diaspora-version')[0] ?? ''; } elseif ($curlResult->inHeader('x-friendica-version')) { $serverdata['platform'] = 'friendica'; $serverdata['network'] = Protocol::DFRN; $serverdata['version'] = $curlResult->getHeader('x-friendica-version')[0] ?? ''; } else { return $serverdata; } if ($serverdata['detection-method'] == self::DETECT_MANUAL) { $serverdata['detection-method'] = self::DETECT_HEADER; } return $serverdata; } /** * 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::select('gserver', ['id', 'url', 'nurl', 'network', 'poco', 'directory-type'], ["NOT `failed` AND `directory-type` != ? AND `last_poco_query` < ?", GServer::DT_NONE, $last_update], ['order' => ['RAND()']]); while ($gserver = DBA::fetch($gservers)) { 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); $fields = ['last_poco_query' => DateTimeFormat::utcNow()]; self::update($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}}'; $curlResult = DI::httpClient()->fetch('https://the-federation.info/graphql?query=' . urlencode($query), HttpClientAccept::JSON); 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. self::add('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'; $curlResult = DI::httpClient()->get($api, HttpClientAccept::JSON, [HttpClientOptions::HEADERS => ['Authorization' => ['Bearer ' . $accesstoken]]]); if ($curlResult->isSuccess()) { $servers = json_decode($curlResult->getBody(), true); if (!empty($servers['instances'])) { foreach ($servers['instances'] as $server) { $url = (is_null($server['https_score']) ? 'http' : 'https') . '://' . $server['name']; self::add($url); } } } } DI::config()->set('poco', 'last_federation_discovery', time()); } /** * Set the protocol for the given server * * @param int $gsid Server id * @param int $protocol Protocol id * * @throws Exception */ public static function setProtocol(int $gsid, int $protocol) { if (empty($gsid)) { return; } $gserver = DBA::selectFirst('gserver', ['protocol', 'url'], ['id' => $gsid]); if (!DBA::isResult($gserver)) { return; } $old = $gserver['protocol']; if (!is_null($old)) { /* The priority for the protocols is: 1. ActivityPub 2. DFRN via Diaspora 3. Legacy DFRN 4. Diaspora 5. OStatus */ // We don't need to change it when nothing is to be changed if ($old == $protocol) { return; } // We don't want to mark a server as OStatus when it had been marked with any other protocol before if ($protocol == Post\DeliveryData::OSTATUS) { return; } // If the server is marked as ActivityPub then we won't change it to anything different if ($old == Post\DeliveryData::ACTIVITYPUB) { return; } // Don't change it to anything lower than DFRN if the new one wasn't ActivityPub if (($old == Post\DeliveryData::DFRN) && ($protocol != Post\DeliveryData::ACTIVITYPUB)) { return; } // Don't change it to Diaspora when it is a legacy DFRN server if (($old == Post\DeliveryData::LEGACY_DFRN) && ($protocol == Post\DeliveryData::DIASPORA)) { return; } } Logger::info('Protocol for server', ['protocol' => $protocol, 'old' => $old, 'id' => $gsid, 'url' => $gserver['url'], 'callstack' => System::callstack(20)]); self::update(['protocol' => $protocol], ['id' => $gsid]); } /** * Fetch the protocol of the given server * * @param int $gsid Server id * * @return ?int One of Post\DeliveryData protocol constants or null if unknown or gserver is missing * * @throws Exception */ public static function getProtocol(int $gsid): ?int { if (empty($gsid)) { return null; } $gserver = DBA::selectFirst('gserver', ['protocol'], ['id' => $gsid]); if (DBA::isResult($gserver)) { return $gserver['protocol']; } return null; } /** * Enforces gserver table field maximum sizes to avoid "Data too long" database errors * * @param array $fields * @param array $condition * * @return bool * * @throws Exception */ public static function update(array $fields, array $condition): bool { $fields = DI::dbaDefinition()->truncateFieldsForTable('gserver', $fields); return DBA::update('gserver', $fields, $condition); } }