3 * @copyright Copyright (C) 2010-2021, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Network;
26 use Friendica\Core\Hook;
27 use Friendica\Core\Logger;
28 use Friendica\Core\Protocol;
29 use Friendica\Core\System;
30 use Friendica\Database\DBA;
32 use Friendica\Model\Contact;
33 use Friendica\Model\GServer;
34 use Friendica\Model\Profile;
35 use Friendica\Model\User;
36 use Friendica\Protocol\ActivityNamespace;
37 use Friendica\Protocol\ActivityPub;
38 use Friendica\Protocol\Email;
39 use Friendica\Protocol\Feed;
40 use Friendica\Util\Crypto;
41 use Friendica\Util\DateTimeFormat;
42 use Friendica\Util\Network;
43 use Friendica\Util\Strings;
44 use Friendica\Util\XML;
47 * This class contain functions for probing URL
51 const WEBFINGER = '/.well-known/webfinger?resource={uri}';
53 private static $baseurl;
54 private static $istimeout;
57 * Remove stuff from an URI that doesn't belong there
60 * @return string Cleaned URI
62 public static function cleanURI(string $URI)
64 // At first remove leading and trailing junk
65 $URI = trim($URI, "@#?:/ \t\n\r\0\x0B");
67 $parts = parse_url($URI);
69 if (empty($parts['scheme'])) {
73 // Remove the URL fragment, since these shouldn't be part of any profile URL
74 unset($parts['fragment']);
76 $URI = Network::unparseURL($parts);
82 * Rearrange the array so that it always has the same order
84 * @param array $data Unordered data
86 * @return array Ordered data
88 private static function rearrangeData($data)
90 $fields = ["name", "nick", "guid", "url", "addr", "alias", "photo", "header",
91 "account-type", "community", "keywords", "location", "about", "hide",
92 "batch", "notify", "poll", "request", "confirm", "subscribe", "poco",
93 "following", "followers", "inbox", "outbox", "sharedinbox",
94 "priority", "network", "pubkey", "manually-approve", "baseurl", "gsid"];
96 $numeric_fields = ["gsid", "hide", "account-type", "manually-approve"];
99 foreach ($fields as $field) {
100 if (isset($data[$field])) {
101 if (in_array($field, $numeric_fields)) {
102 $newdata[$field] = (int)$data[$field];
104 $newdata[$field] = $data[$field];
106 } elseif (!in_array($field, $numeric_fields)) {
107 $newdata[$field] = "";
109 $newdata[$field] = null;
113 // We don't use the "priority" field anymore and replace it with a dummy.
114 $newdata["priority"] = 0;
120 * Check if the hostname belongs to the own server
122 * @param string $host The hostname that is to be checked
124 * @return bool Does the testes hostname belongs to the own server?
126 private static function ownHost($host)
128 $own_host = DI::baseUrl()->getHostname();
130 $parts = parse_url($host);
132 if (!isset($parts['scheme'])) {
133 $parts = parse_url('http://'.$host);
136 if (!isset($parts['host'])) {
139 return $parts['host'] == $own_host;
143 * Probes for webfinger path via "host-meta"
145 * We have to check if the servers in the future still will offer this.
146 * It seems as if it was dropped from the standard.
148 * @param string $host The host part of an url
150 * @return array with template and type of the webfinger template for JSON or XML
151 * @throws HTTPException\InternalServerErrorException
153 private static function hostMeta($host)
155 // Reset the static variable
158 // Handles the case when the hostname contains the scheme
159 if (!parse_url($host, PHP_URL_SCHEME)) {
160 $ssl_url = "https://" . $host . "/.well-known/host-meta";
161 $url = "http://" . $host . "/.well-known/host-meta";
163 $ssl_url = $host . "/.well-known/host-meta";
167 $xrd_timeout = DI::config()->get('system', 'xrd_timeout', 20);
169 Logger::info('Probing', ['host' => $host, 'ssl_url' => $ssl_url, 'url' => $url, 'callstack' => System::callstack(20)]);
172 $curlResult = DI::httpRequest()->get($ssl_url, ['timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml']);
173 $ssl_connection_error = ($curlResult->getErrorNumber() == CURLE_COULDNT_CONNECT) || ($curlResult->getReturnCode() == 0);
174 if ($curlResult->isSuccess()) {
175 $xml = $curlResult->getBody();
176 $xrd = XML::parseString($xml, true);
178 $host_url = 'https://' . $host;
182 } elseif ($curlResult->isTimeout()) {
183 Logger::info('Probing timeout', ['url' => $ssl_url]);
184 self::$istimeout = true;
188 if (!is_object($xrd) && !empty($url)) {
189 $curlResult = DI::httpRequest()->get($url, ['timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml']);
190 $connection_error = ($curlResult->getErrorNumber() == CURLE_COULDNT_CONNECT) || ($curlResult->getReturnCode() == 0);
191 if ($curlResult->isTimeout()) {
192 Logger::info('Probing timeout', ['url' => $url]);
193 self::$istimeout = true;
195 } elseif ($connection_error && $ssl_connection_error) {
196 self::$istimeout = true;
200 $xml = $curlResult->getBody();
201 $xrd = XML::parseString($xml, true);
202 $host_url = 'http://'.$host;
204 if (!is_object($xrd)) {
205 Logger::info('No xrd object found', ['host' => $host]);
209 $links = XML::elementToArray($xrd);
210 if (!isset($links["xrd"]["link"])) {
211 Logger::info('No xrd data found', ['host' => $host]);
217 foreach ($links["xrd"]["link"] as $value => $link) {
218 if (!empty($link["@attributes"])) {
219 $attributes = $link["@attributes"];
220 } elseif ($value == "@attributes") {
226 if (!empty($attributes["rel"]) && $attributes["rel"] == "lrdd" && !empty($attributes["template"])) {
227 $type = (empty($attributes["type"]) ? '' : $attributes["type"]);
229 $lrdd[$type] = $attributes["template"];
233 self::$baseurl = $host_url;
235 Logger::info('Probing successful', ['host' => $host]);
241 * Perform Webfinger lookup and return DFRN data
243 * Given an email style address, perform webfinger lookup and
244 * return the resulting DFRN profile URL, or if no DFRN profile URL
245 * is located, returns an OStatus subscription template (prefixed
246 * with the string 'stat:' to identify it as on OStatus template).
247 * If this isn't an email style address just return $webbie.
248 * Return an empty string if email-style addresses but webfinger fails,
249 * or if the resultant personal XRD doesn't contain a supported
250 * subscription/friend-request attribute.
252 * amended 7/9/2011 to return an hcard which could save potentially loading
253 * a lengthy content page to scrape dfrn attributes
255 * @param string $webbie Address that should be probed
256 * @param string $hcard_url Link to the hcard - is returned by reference
258 * @return string profile link
259 * @throws HTTPException\InternalServerErrorException
261 public static function webfingerDfrn(string $webbie, string &$hcard_url)
265 $links = self::lrdd($webbie);
266 Logger::debug('Result', ['url' => $webbie, 'links' => $links]);
267 if (!empty($links) && is_array($links)) {
268 foreach ($links as $link) {
269 if ($link['@attributes']['rel'] === ActivityNamespace::DFRN) {
270 $profile_link = $link['@attributes']['href'];
272 if (($link['@attributes']['rel'] === ActivityNamespace::OSTATUSSUB) && ($profile_link == "")) {
273 $profile_link = 'stat:'.$link['@attributes']['template'];
275 if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard') {
276 $hcard_url = $link['@attributes']['href'];
280 return $profile_link;
284 * Check an URI for LRDD data
286 * @param string $uri Address that should be probed
288 * @return array uri data
289 * @throws HTTPException\InternalServerErrorException
291 public static function lrdd(string $uri)
293 $data = self::getWebfingerArray($uri);
297 $webfinger = $data['webfinger'];
299 if (empty($webfinger["links"])) {
300 Logger::info('No webfinger links found', ['uri' => $uri]);
306 foreach ($webfinger["links"] as $link) {
307 $data[] = ["@attributes" => $link];
310 if (!empty($webfinger["aliases"]) && is_array($webfinger["aliases"])) {
311 foreach ($webfinger["aliases"] as $alias) {
312 $data[] = ["@attributes" =>
322 * Fetch information (protocol endpoints and user information) about a given uri
324 * @param string $uri Address that should be probed
325 * @param string $network Test for this specific network
326 * @param integer $uid User ID for the probe (only used for mails)
327 * @param boolean $cache Use cached values?
329 * @return array uri data
330 * @throws HTTPException\InternalServerErrorException
331 * @throws \ImagickException
333 public static function uri($uri, $network = '', $uid = -1)
335 // Local profiles aren't probed via network
336 if (empty($network) && Contact::isLocal($uri)) {
337 $data = self::localProbe($uri);
347 if (empty($network) || ($network == Protocol::ACTIVITYPUB)) {
348 $ap_profile = ActivityPub::probeProfile($uri);
353 self::$istimeout = false;
355 if ($network != Protocol::ACTIVITYPUB) {
356 $data = self::detect($uri, $network, $uid, $ap_profile);
357 if (!is_array($data)) {
360 if (empty($data) || (!empty($ap_profile) && empty($network) && (($data['network'] ?? '') != Protocol::DFRN))) {
362 } elseif (!empty($ap_profile)) {
363 $ap_profile['batch'] = '';
364 $data = array_merge($ap_profile, $data);
370 if (!isset($data['url'])) {
374 if (empty($data['photo'])) {
375 $data['photo'] = DI::baseUrl() . Contact::DEFAULT_AVATAR_PHOTO;
378 if (empty($data['name'])) {
379 if (!empty($data['nick'])) {
380 $data['name'] = $data['nick'];
383 if (empty($data['name'])) {
384 $data['name'] = $data['url'];
388 if (empty($data['nick'])) {
389 $data['nick'] = strtolower($data['name']);
391 if (strpos($data['nick'], ' ')) {
392 $data['nick'] = trim(substr($data['nick'], 0, strpos($data['nick'], ' ')));
396 if (!empty($data['baseurl']) && empty($data['gsid'])) {
397 $data['gsid'] = GServer::getID($data['baseurl']);
400 if (empty($data['network'])) {
401 $data['network'] = Protocol::PHANTOM;
404 // Ensure that local connections always are DFRN
405 if (($network == '') && ($data['network'] != Protocol::PHANTOM) && (self::ownHost($data['baseurl'] ?? '') || self::ownHost($data['url']))) {
406 $data['network'] = Protocol::DFRN;
409 if (!isset($data['hide']) && in_array($data['network'], Protocol::FEDERATED)) {
410 $data['hide'] = self::getHideStatus($data['url']);
413 return self::rearrangeData($data);
418 * Fetches the "hide" status from the profile
420 * @param string $url URL of the profile
422 * @return boolean "hide" status
424 private static function getHideStatus($url)
426 $curlResult = DI::httpRequest()->get($url);
427 if (!$curlResult->isSuccess()) {
431 // If the file is too large then exit
432 if (($curlResult->getInfo()['download_content_length'] ?? 0) > 1000000) {
436 // If it isn't a HTML file then exit
437 if (($curlResult->getContentType() != '') && !strstr(strtolower($curlResult->getContentType()), 'html')) {
441 $body = $curlResult->getBody();
446 $doc = new DOMDocument();
447 @$doc->loadHTML($body);
449 $xpath = new DOMXPath($doc);
451 $list = $xpath->query('//meta[@name]');
452 foreach ($list as $node) {
454 if ($node->attributes->length) {
455 foreach ($node->attributes as $attribute) {
456 $meta_tag[$attribute->name] = $attribute->value;
460 if (empty($meta_tag['content'])) {
464 $content = strtolower(trim($meta_tag['content']));
466 switch (strtolower(trim($meta_tag['name']))) {
467 case 'dfrn-global-visibility':
468 if ($content == 'false') {
473 if (strpos($content, 'noindex') !== false) {
484 * Fetch the "subscribe" and add it to the result
486 * @param array $result
487 * @param array $webfinger
488 * @return array result
490 private static function getSubscribeLink(array $result, array $webfinger)
492 if (empty($webfinger['links'])) {
496 foreach ($webfinger['links'] as $link) {
497 if (!empty($link['template']) && ($link['rel'] === ActivityNamespace::OSTATUSSUB)) {
498 $result['subscribe'] = $link['template'];
506 * Get webfinger data from a given URI
509 * @return array Webfinger array
511 private static function getWebfingerArray(string $uri)
513 $parts = parse_url($uri);
515 if (!empty($parts['scheme']) && !empty($parts['host'])) {
516 $host = $parts['host'];
517 if (!empty($parts['port'])) {
518 $host .= ':'.$parts['port'];
521 $baseurl = $parts['scheme'] . '://' . $host;
526 $path_parts = explode("/", trim($parts['path'] ?? '', "/"));
527 if (!empty($path_parts)) {
528 $nick = ltrim(end($path_parts), '@');
529 // When the last part of the URI is numeric then it is most likely an ID and not a nick name
530 if (!is_numeric($nick)) {
531 $addr = $nick."@".$host;
537 $webfinger = self::getWebfinger($parts['scheme'] . '://' . $host . self::WEBFINGER, 'application/jrd+json', $uri, $addr);
538 if (empty($webfinger)) {
539 $lrdd = self::hostMeta($host);
542 if (empty($webfinger) && empty($lrdd)) {
543 while (empty($lrdd) && empty($webfinger) && (sizeof($path_parts) > 1)) {
544 $host .= "/".array_shift($path_parts);
545 $baseurl = $parts['scheme'] . '://' . $host;
548 $addr = $nick."@".$host;
551 $webfinger = self::getWebfinger($parts['scheme'] . '://' . $host . self::WEBFINGER, 'application/jrd+json', $uri, $addr);
552 if (empty($webfinger)) {
553 $lrdd = self::hostMeta($host);
557 if (empty($lrdd) && empty($webfinger)) {
561 } elseif (strstr($uri, '@')) {
562 // Remove "acct:" from the URI
563 $uri = str_replace('acct:', '', $uri);
565 $host = substr($uri, strpos($uri, '@') + 1);
566 $nick = substr($uri, 0, strpos($uri, '@'));
569 $webfinger = self::getWebfinger('https://' . $host . self::WEBFINGER, 'application/jrd+json', $uri, $addr);
570 if (self::$istimeout) {
574 if (empty($webfinger)) {
575 $webfinger = self::getWebfinger('http://' . $host . self::WEBFINGER, 'application/jrd+json', $uri, $addr);
576 if (self::$istimeout) {
580 $baseurl = 'https://' . $host;
583 if (empty($webfinger)) {
584 $lrdd = self::hostMeta($host);
585 if (self::$istimeout) {
588 $baseurl = self::$baseurl;
590 $baseurl = 'http://' . $host;
593 Logger::info('URI was not detectable', ['uri' => $uri]);
597 if (empty($webfinger)) {
598 foreach ($lrdd as $type => $template) {
603 $webfinger = self::getWebfinger($template, $type, $uri, $addr);
607 if (empty($webfinger)) {
611 if ($webfinger['detected'] == $addr) {
612 $webfinger['nick'] = $nick;
613 $webfinger['addr'] = $addr;
616 $webfinger['baseurl'] = $baseurl;
622 * Perform network request for webfinger data
624 * @param string $template
625 * @param string $type
627 * @param string $addr
628 * @return array webfinger results
630 private static function getWebfinger(string $template, string $type, string $uri, string $addr)
632 // First try the address because this is the primary purpose of webfinger
635 $path = str_replace('{uri}', urlencode("acct:" . $addr), $template);
636 $webfinger = self::webfinger($path, $type);
637 if (self::$istimeout) {
643 if (empty($webfinger) && $uri != $addr) {
645 $path = str_replace('{uri}', urlencode($uri), $template);
646 $webfinger = self::webfinger($path, $type);
647 if (self::$istimeout) {
652 if (empty($webfinger)) {
656 return ['webfinger' => $webfinger, 'detected' => $detected];
660 * Fetch information (protocol endpoints and user information) about a given uri
662 * This function is only called by the "uri" function that adds caching and rearranging of data.
664 * @param string $uri Address that should be probed
665 * @param string $network Test for this specific network
666 * @param integer $uid User ID for the probe (only used for mails)
667 * @param array $ap_profile Previously probed AP profile
669 * @return array uri data
670 * @throws HTTPException\InternalServerErrorException
672 private static function detect(string $uri, string $network, int $uid, array $ap_profile)
676 'network' => $network,
681 Hook::callAll('probe_detect', $hookData);
683 if ($hookData['result']) {
684 if (!is_array($hookData['result'])) {
687 return $hookData['result'];
691 $parts = parse_url($uri);
693 if (!empty($parts['scheme']) && !empty($parts['host'])) {
694 if (in_array($parts['host'], ['twitter.com', 'mobile.twitter.com'])) {
695 return self::twitter($uri);
697 } elseif (strstr($uri, '@')) {
698 // If the URI starts with "mailto:" then jump directly to the mail detection
699 if (strpos($uri, 'mailto:') !== false) {
700 $uri = str_replace('mailto:', '', $uri);
701 return self::mail($uri, $uid);
704 if ($network == Protocol::MAIL) {
705 return self::mail($uri, $uid);
708 if (Strings::endsWith($uri, '@twitter.com')
709 || Strings::endsWith($uri, '@mobile.twitter.com')
711 return self::twitter($uri);
714 Logger::info('URI was not detectable', ['uri' => $uri]);
718 Logger::info('Probing start', ['uri' => $uri]);
720 if (!empty($ap_profile['addr']) && ($ap_profile['addr'] != $uri)) {
721 $data = self::getWebfingerArray($ap_profile['addr']);
725 $data = self::getWebfingerArray($uri);
729 if (!empty($parts['scheme'])) {
730 return self::feed($uri);
731 } elseif (!empty($uid)) {
732 return self::mail($uri, $uid);
738 $webfinger = $data['webfinger'];
739 $nick = $data['nick'] ?? '';
740 $addr = $data['addr'] ?? '';
741 $baseurl = $data['baseurl'] ?? '';
745 if (in_array($network, ["", Protocol::DFRN])) {
746 $result = self::dfrn($webfinger);
748 if ((!$result && ($network == "")) || ($network == Protocol::DIASPORA)) {
749 $result = self::diaspora($webfinger);
751 if ((!$result && ($network == "")) || ($network == Protocol::OSTATUS)) {
752 $result = self::ostatus($webfinger);
754 if (in_array($network, ['', Protocol::ZOT])) {
755 $result = self::zot($webfinger, $result, $baseurl);
757 if ((!$result && ($network == "")) || ($network == Protocol::PUMPIO)) {
758 $result = self::pumpio($webfinger, $addr);
760 if (empty($result['network']) && empty($ap_profile['network']) || ($network == Protocol::FEED)) {
761 $result = self::feed($uri);
763 // We overwrite the detected nick with our try if the previois routines hadn't detected it.
764 // Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
765 if ((empty($result["nick"]) || (strstr($result["nick"], " "))) && ($nick != "")) {
766 $result["nick"] = $nick;
769 if (empty($result["addr"]) && ($addr != "")) {
770 $result["addr"] = $addr;
774 $result = self::getSubscribeLink($result, $webfinger);
776 if (empty($result["network"])) {
777 $result["network"] = Protocol::PHANTOM;
780 if (empty($result['baseurl']) && !empty($baseurl)) {
781 $result['baseurl'] = $baseurl;
784 if (empty($result["url"])) {
785 $result["url"] = $uri;
788 Logger::info('Probing done', ['uri' => $uri, 'network' => $result["network"]]);
794 * Check for Zot contact
796 * @param array $webfinger Webfinger data
797 * @param array $data previously probed data
799 * @return array Zot data
800 * @throws HTTPException\InternalServerErrorException
802 private static function zot($webfinger, $data, $baseurl)
804 if (!empty($webfinger["aliases"]) && is_array($webfinger["aliases"])) {
805 foreach ($webfinger["aliases"] as $alias) {
806 if (substr($alias, 0, 5) == 'acct:') {
807 $data["addr"] = substr($alias, 5);
812 if (!empty($webfinger["subject"]) && (substr($webfinger["subject"], 0, 5) == "acct:")) {
813 $data["addr"] = substr($webfinger["subject"], 5);
817 foreach ($webfinger['links'] as $link) {
818 if (($link['rel'] == 'http://purl.org/zot/protocol') && !empty($link['href'])) {
819 $zot_url = $link['href'];
823 if (empty($zot_url) && !empty($data['addr']) && !empty($baseurl)) {
824 $condition = ['nurl' => Strings::normaliseLink($baseurl), 'platform' => ['hubzilla']];
825 if (!DBA::exists('gserver', $condition)) {
828 $zot_url = $baseurl . '/.well-known/zot-info?address=' . $data['addr'];
831 if (empty($zot_url)) {
835 $data = self::pollZot($zot_url, $data);
837 if (!empty($data['url']) && !empty($webfinger['aliases']) && is_array($webfinger['aliases'])) {
838 foreach ($webfinger['aliases'] as $alias) {
839 if (!strstr($alias, '@') && Strings::normaliseLink($alias) != Strings::normaliseLink($data['url'])) {
840 $data['alias'] = $alias;
848 public static function pollZot($url, $data)
850 $curlResult = DI::httpRequest()->get($url);
851 if ($curlResult->isTimeout()) {
854 $content = $curlResult->getBody();
859 $json = json_decode($content, true);
860 if (!is_array($json)) {
864 if (empty($data['network'])) {
865 if (!empty($json['protocols']) && in_array('zot', $json['protocols'])) {
866 $data['network'] = Protocol::ZOT;
867 } elseif (!isset($json['protocols'])) {
868 $data['network'] = Protocol::ZOT;
872 if (!empty($json['guid']) && empty($data['guid'])) {
873 $data['guid'] = $json['guid'];
875 if (!empty($json['key']) && empty($data['pubkey'])) {
876 $data['pubkey'] = $json['key'];
878 if (!empty($json['name'])) {
879 $data['name'] = $json['name'];
881 if (!empty($json['photo'])) {
882 $data['photo'] = $json['photo'];
883 if (!empty($json['photo_updated'])) {
884 $data['photo'] .= '?rev=' . urlencode($json['photo_updated']);
887 if (!empty($json['address'])) {
888 $data['addr'] = $json['address'];
890 if (!empty($json['url'])) {
891 $data['url'] = $json['url'];
893 if (!empty($json['connections_url'])) {
894 $data['poco'] = $json['connections_url'];
896 if (isset($json['searchable'])) {
897 $data['hide'] = !$json['searchable'];
899 if (!empty($json['public_forum'])) {
900 $data['community'] = $json['public_forum'];
901 $data['account-type'] = User::PAGE_FLAGS_COMMUNITY;
904 if (!empty($json['profile'])) {
905 $profile = $json['profile'];
906 if (!empty($profile['description'])) {
907 $data['about'] = $profile['description'];
909 if (!empty($profile['keywords'])) {
910 $keywords = implode(', ', $profile['keywords']);
911 if (!empty($keywords)) {
912 $data['keywords'] = $keywords;
917 if (!empty($profile['region'])) {
918 $loc['region'] = $profile['region'];
920 if (!empty($profile['country'])) {
921 $loc['country-name'] = $profile['country'];
923 $location = Profile::formatLocation($loc);
924 if (!empty($location)) {
925 $data['location'] = $location;
933 * Perform a webfinger request.
935 * For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
937 * @param string $url Address that should be probed
938 * @param string $type type
940 * @return array webfinger data
941 * @throws HTTPException\InternalServerErrorException
943 public static function webfinger($url, $type)
945 $xrd_timeout = DI::config()->get('system', 'xrd_timeout', 20);
947 $curlResult = DI::httpRequest()->get($url, ['timeout' => $xrd_timeout, 'accept_content' => $type]);
948 if ($curlResult->isTimeout()) {
949 self::$istimeout = true;
952 $data = $curlResult->getBody();
954 $webfinger = json_decode($data, true);
955 if (!empty($webfinger)) {
956 if (!isset($webfinger["links"])) {
957 Logger::info('No json webfinger links', ['url' => $url]);
963 // If it is not JSON, maybe it is XML
964 $xrd = XML::parseString($data, true);
965 if (!is_object($xrd)) {
966 Logger::info('No webfinger data retrievable', ['url' => $url]);
970 $xrd_arr = XML::elementToArray($xrd);
971 if (!isset($xrd_arr["xrd"]["link"])) {
972 Logger::info('No XML webfinger links', ['url' => $url]);
978 if (!empty($xrd_arr["xrd"]["subject"])) {
979 $webfinger["subject"] = $xrd_arr["xrd"]["subject"];
982 if (!empty($xrd_arr["xrd"]["alias"])) {
983 $webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
986 $webfinger["links"] = [];
988 foreach ($xrd_arr["xrd"]["link"] as $value => $data) {
989 if (!empty($data["@attributes"])) {
990 $attributes = $data["@attributes"];
991 } elseif ($value == "@attributes") {
997 $webfinger["links"][] = $attributes;
1003 * Poll the Friendica specific noscrape page.
1005 * "noscrape" is a faster alternative to fetch the data from the hcard.
1006 * This functionality was originally created for the directory.
1008 * @param string $noscrape_url Link to the noscrape page
1009 * @param array $data The already fetched data
1011 * @return array noscrape data
1012 * @throws HTTPException\InternalServerErrorException
1014 private static function pollNoscrape($noscrape_url, $data)
1016 $curlResult = DI::httpRequest()->get($noscrape_url);
1017 if ($curlResult->isTimeout()) {
1018 self::$istimeout = true;
1021 $content = $curlResult->getBody();
1023 Logger::info('Empty body', ['url' => $noscrape_url]);
1027 $json = json_decode($content, true);
1028 if (!is_array($json)) {
1029 Logger::info('No json data', ['url' => $noscrape_url]);
1033 if (!empty($json["fn"])) {
1034 $data["name"] = $json["fn"];
1037 if (!empty($json["addr"])) {
1038 $data["addr"] = $json["addr"];
1041 if (!empty($json["nick"])) {
1042 $data["nick"] = $json["nick"];
1045 if (!empty($json["guid"])) {
1046 $data["guid"] = $json["guid"];
1049 if (!empty($json["comm"])) {
1050 $data["community"] = $json["comm"];
1053 if (!empty($json["tags"])) {
1054 $keywords = implode(", ", $json["tags"]);
1055 if ($keywords != "") {
1056 $data["keywords"] = $keywords;
1060 $location = Profile::formatLocation($json);
1062 $data["location"] = $location;
1065 if (!empty($json["about"])) {
1066 $data["about"] = $json["about"];
1069 if (!empty($json["key"])) {
1070 $data["pubkey"] = $json["key"];
1073 if (!empty($json["photo"])) {
1074 $data["photo"] = $json["photo"];
1077 if (!empty($json["dfrn-request"])) {
1078 $data["request"] = $json["dfrn-request"];
1081 if (!empty($json["dfrn-confirm"])) {
1082 $data["confirm"] = $json["dfrn-confirm"];
1085 if (!empty($json["dfrn-notify"])) {
1086 $data["notify"] = $json["dfrn-notify"];
1089 if (!empty($json["dfrn-poll"])) {
1090 $data["poll"] = $json["dfrn-poll"];
1093 if (isset($json["hide"])) {
1094 $data["hide"] = (bool)$json["hide"];
1096 $data["hide"] = false;
1103 * Check for valid DFRN data
1105 * @param array $data DFRN data
1107 * @return int Number of errors
1109 public static function validDfrn($data)
1112 if (!isset($data['key'])) {
1115 if (!isset($data['dfrn-request'])) {
1118 if (!isset($data['dfrn-confirm'])) {
1121 if (!isset($data['dfrn-notify'])) {
1124 if (!isset($data['dfrn-poll'])) {
1131 * Fetch data from a DFRN profile page and via "noscrape"
1133 * @param string $profile_link Link to the profile page
1135 * @return array profile data
1136 * @throws HTTPException\InternalServerErrorException
1137 * @throws \ImagickException
1139 public static function profile($profile_link)
1143 Logger::info('Check profile', ['link' => $profile_link]);
1145 // Fetch data via noscrape - this is faster
1146 $noscrape_url = str_replace(["/hcard/", "/profile/"], "/noscrape/", $profile_link);
1147 $data = self::pollNoscrape($noscrape_url, $data);
1149 if (!isset($data["notify"])
1150 || !isset($data["confirm"])
1151 || !isset($data["request"])
1152 || !isset($data["poll"])
1153 || !isset($data["name"])
1154 || !isset($data["photo"])
1156 $data = self::pollHcard($profile_link, $data, true);
1161 if (empty($data["addr"]) || empty($data["nick"])) {
1162 $probe_data = self::uri($profile_link);
1163 $data["addr"] = ($data["addr"] ?? '') ?: $probe_data["addr"];
1164 $data["nick"] = ($data["nick"] ?? '') ?: $probe_data["nick"];
1167 $prof_data["addr"] = $data["addr"];
1168 $prof_data["nick"] = $data["nick"];
1169 $prof_data["dfrn-request"] = $data['request'] ?? null;
1170 $prof_data["dfrn-confirm"] = $data['confirm'] ?? null;
1171 $prof_data["dfrn-notify"] = $data['notify'] ?? null;
1172 $prof_data["dfrn-poll"] = $data['poll'] ?? null;
1173 $prof_data["photo"] = $data['photo'] ?? null;
1174 $prof_data["fn"] = $data['name'] ?? null;
1175 $prof_data["key"] = $data['pubkey'] ?? null;
1177 Logger::debug('Result', ['link' => $profile_link, 'data' => $prof_data]);
1183 * Check for DFRN contact
1185 * @param array $webfinger Webfinger data
1187 * @return array DFRN data
1188 * @throws HTTPException\InternalServerErrorException
1190 private static function dfrn($webfinger)
1194 // The array is reversed to take into account the order of preference for same-rel links
1195 // See: https://tools.ietf.org/html/rfc7033#section-4.4.4
1196 foreach (array_reverse($webfinger["links"]) as $link) {
1197 if (($link["rel"] == ActivityNamespace::DFRN) && !empty($link["href"])) {
1198 $data["network"] = Protocol::DFRN;
1199 } elseif (($link["rel"] == ActivityNamespace::FEED) && !empty($link["href"])) {
1200 $data["poll"] = $link["href"];
1201 } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") && (($link["type"] ?? "") == "text/html") && !empty($link["href"])) {
1202 $data["url"] = $link["href"];
1203 } elseif (($link["rel"] == "http://microformats.org/profile/hcard") && !empty($link["href"])) {
1204 $hcard_url = $link["href"];
1205 } elseif (($link["rel"] == ActivityNamespace::POCO) && !empty($link["href"])) {
1206 $data["poco"] = $link["href"];
1207 } elseif (($link["rel"] == "http://webfinger.net/rel/avatar") && !empty($link["href"])) {
1208 $data["photo"] = $link["href"];
1209 } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") && !empty($link["href"])) {
1210 $data["baseurl"] = trim($link["href"], '/');
1211 } elseif (($link["rel"] == "http://joindiaspora.com/guid") && !empty($link["href"])) {
1212 $data["guid"] = $link["href"];
1213 } elseif (($link["rel"] == "diaspora-public-key") && !empty($link["href"])) {
1214 $data["pubkey"] = base64_decode($link["href"]);
1216 //if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
1217 if (strstr($data["pubkey"], 'RSA ')) {
1218 $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
1223 if (!empty($webfinger["aliases"]) && is_array($webfinger["aliases"])) {
1224 foreach ($webfinger["aliases"] as $alias) {
1225 if (empty($data["url"]) && !strstr($alias, "@")) {
1226 $data["url"] = $alias;
1227 } elseif (!strstr($alias, "@") && Strings::normaliseLink($alias) != Strings::normaliseLink($data["url"])) {
1228 $data["alias"] = $alias;
1229 } elseif (substr($alias, 0, 5) == 'acct:') {
1230 $data["addr"] = substr($alias, 5);
1235 if (!empty($webfinger["subject"]) && (substr($webfinger["subject"], 0, 5) == "acct:")) {
1236 $data["addr"] = substr($webfinger["subject"], 5);
1239 if (!isset($data["network"]) || ($hcard_url == "")) {
1243 // Fetch data via noscrape - this is faster
1244 $noscrape_url = str_replace("/hcard/", "/noscrape/", $hcard_url);
1245 $data = self::pollNoscrape($noscrape_url, $data);
1247 if (isset($data["notify"])
1248 && isset($data["confirm"])
1249 && isset($data["request"])
1250 && isset($data["poll"])
1251 && isset($data["name"])
1252 && isset($data["photo"])
1257 $data = self::pollHcard($hcard_url, $data, true);
1263 * Poll the hcard page (Diaspora and Friendica specific)
1265 * @param string $hcard_url Link to the hcard page
1266 * @param array $data The already fetched data
1267 * @param boolean $dfrn Poll DFRN specific data
1269 * @return array hcard data
1270 * @throws HTTPException\InternalServerErrorException
1272 private static function pollHcard($hcard_url, $data, $dfrn = false)
1274 $curlResult = DI::httpRequest()->get($hcard_url);
1275 if ($curlResult->isTimeout()) {
1276 self::$istimeout = true;
1279 $content = $curlResult->getBody();
1280 if (empty($content)) {
1284 $doc = new DOMDocument();
1285 if (!@$doc->loadHTML($content)) {
1289 $xpath = new DomXPath($doc);
1291 $vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
1292 if (!is_object($vcards)) {
1296 if (!isset($data["baseurl"])) {
1297 $data["baseurl"] = "";
1300 if ($vcards->length > 0) {
1301 $vcard = $vcards->item(0);
1303 // We have to discard the guid from the hcard in favour of the guid from lrdd
1304 // Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
1305 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
1306 if (($search->length > 0) && empty($data["guid"])) {
1307 $data["guid"] = $search->item(0)->nodeValue;
1310 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
1311 if ($search->length > 0) {
1312 $data["nick"] = $search->item(0)->nodeValue;
1315 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
1316 if ($search->length > 0) {
1317 $data["name"] = $search->item(0)->nodeValue;
1320 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
1321 if ($search->length > 0) {
1322 $data["searchable"] = $search->item(0)->nodeValue;
1325 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
1326 if ($search->length > 0) {
1327 $data["pubkey"] = $search->item(0)->nodeValue;
1328 if (strstr($data["pubkey"], 'RSA ')) {
1329 $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
1333 $search = $xpath->query("//*[@id='pod_location']", $vcard); // */
1334 if ($search->length > 0) {
1335 $data["baseurl"] = trim($search->item(0)->nodeValue, "/");
1340 if (!empty($vcard)) {
1341 $photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
1342 foreach ($photos as $photo) {
1344 foreach ($photo->attributes as $attribute) {
1345 $attr[$attribute->name] = trim($attribute->value);
1348 if (isset($attr["src"]) && isset($attr["width"])) {
1349 $avatar[$attr["width"]] = $attr["src"];
1352 // We don't have a width. So we just take everything that we got.
1353 // This is a Hubzilla workaround which doesn't send a width.
1354 if ((sizeof($avatar) == 0) && !empty($attr["src"])) {
1355 $avatar[] = $attr["src"];
1360 if (sizeof($avatar)) {
1362 $data["photo"] = self::fixAvatar(array_pop($avatar), $data["baseurl"]);
1366 // Poll DFRN specific data
1367 $search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
1368 if ($search->length > 0) {
1369 foreach ($search as $link) {
1370 //$data["request"] = $search->item(0)->nodeValue;
1372 foreach ($link->attributes as $attribute) {
1373 $attr[$attribute->name] = trim($attribute->value);
1376 $data[substr($attr["rel"], 5)] = $attr["href"];
1380 // Older Friendica versions had used the "uid" field differently than newer versions
1381 if (!empty($data["nick"]) && !empty($data["guid"]) && ($data["nick"] == $data["guid"])) {
1382 unset($data["guid"]);
1391 * Check for Diaspora contact
1393 * @param array $webfinger Webfinger data
1395 * @return array Diaspora data
1396 * @throws HTTPException\InternalServerErrorException
1398 private static function diaspora($webfinger)
1403 // The array is reversed to take into account the order of preference for same-rel links
1404 // See: https://tools.ietf.org/html/rfc7033#section-4.4.4
1405 foreach (array_reverse($webfinger["links"]) as $link) {
1406 if (($link["rel"] == "http://microformats.org/profile/hcard") && !empty($link["href"])) {
1407 $hcard_url = $link["href"];
1408 } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") && !empty($link["href"])) {
1409 $data["baseurl"] = trim($link["href"], '/');
1410 } elseif (($link["rel"] == "http://joindiaspora.com/guid") && !empty($link["href"])) {
1411 $data["guid"] = $link["href"];
1412 } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") && (($link["type"] ?? "") == "text/html") && !empty($link["href"])) {
1413 $data["url"] = $link["href"];
1414 } elseif (($link["rel"] == ActivityNamespace::FEED) && !empty($link["href"])) {
1415 $data["poll"] = $link["href"];
1416 } elseif (($link["rel"] == ActivityNamespace::POCO) && !empty($link["href"])) {
1417 $data["poco"] = $link["href"];
1418 } elseif (($link["rel"] == "salmon") && !empty($link["href"])) {
1419 $data["notify"] = $link["href"];
1420 } elseif (($link["rel"] == "diaspora-public-key") && !empty($link["href"])) {
1421 $data["pubkey"] = base64_decode($link["href"]);
1423 //if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
1424 if (strstr($data["pubkey"], 'RSA ')) {
1425 $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
1430 if (empty($data["url"]) || empty($hcard_url)) {
1434 if (!empty($webfinger["aliases"]) && is_array($webfinger["aliases"])) {
1435 foreach ($webfinger["aliases"] as $alias) {
1436 if (Strings::normaliseLink($alias) != Strings::normaliseLink($data["url"]) && ! strstr($alias, "@")) {
1437 $data["alias"] = $alias;
1438 } elseif (substr($alias, 0, 5) == 'acct:') {
1439 $data["addr"] = substr($alias, 5);
1444 if (!empty($webfinger["subject"]) && (substr($webfinger["subject"], 0, 5) == 'acct:')) {
1445 $data["addr"] = substr($webfinger["subject"], 5);
1448 // Fetch further information from the hcard
1449 $data = self::pollHcard($hcard_url, $data);
1455 if (!empty($data["url"])
1456 && !empty($data["guid"])
1457 && !empty($data["baseurl"])
1458 && !empty($data["pubkey"])
1459 && !empty($hcard_url)
1461 $data["network"] = Protocol::DIASPORA;
1462 $data["manually-approve"] = false;
1464 // The Diaspora handle must always be lowercase
1465 if (!empty($data["addr"])) {
1466 $data["addr"] = strtolower($data["addr"]);
1469 // We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
1470 $data["notify"] = $data["baseurl"] . "/receive/users/" . $data["guid"];
1471 $data["batch"] = $data["baseurl"] . "/receive/public";
1480 * Check for OStatus contact
1482 * @param array $webfinger Webfinger data
1483 * @param bool $short Short detection mode
1485 * @return array|bool OStatus data or "false" on error or "true" on short mode
1486 * @throws HTTPException\InternalServerErrorException
1488 private static function ostatus($webfinger, $short = false)
1492 if (!empty($webfinger["aliases"]) && is_array($webfinger["aliases"])) {
1493 foreach ($webfinger["aliases"] as $alias) {
1494 if (strstr($alias, "@") && !strstr(Strings::normaliseLink($alias), "http://")) {
1495 $data["addr"] = str_replace('acct:', '', $alias);
1500 if (!empty($webfinger["subject"]) && strstr($webfinger["subject"], "@")
1501 && !strstr(Strings::normaliseLink($webfinger["subject"]), "http://")
1503 $data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
1506 if (!empty($webfinger["links"])) {
1507 // The array is reversed to take into account the order of preference for same-rel links
1508 // See: https://tools.ietf.org/html/rfc7033#section-4.4.4
1509 foreach (array_reverse($webfinger["links"]) as $link) {
1510 if (($link["rel"] == "http://webfinger.net/rel/profile-page")
1511 && (($link["type"] ?? "") == "text/html")
1512 && ($link["href"] != "")
1514 $data["url"] = $data["alias"] = $link["href"];
1515 } elseif (($link["rel"] == "salmon") && !empty($link["href"])) {
1516 $data["notify"] = $link["href"];
1517 } elseif (($link["rel"] == ActivityNamespace::FEED) && !empty($link["href"])) {
1518 $data["poll"] = $link["href"];
1519 } elseif (($link["rel"] == "magic-public-key") && !empty($link["href"])) {
1520 $pubkey = $link["href"];
1522 if (substr($pubkey, 0, 5) === 'data:') {
1523 if (strstr($pubkey, ',')) {
1524 $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
1526 $pubkey = substr($pubkey, 5);
1528 } elseif (Strings::normaliseLink($pubkey) == 'http://') {
1529 $curlResult = DI::httpRequest()->get($pubkey);
1530 if ($curlResult->isTimeout()) {
1531 self::$istimeout = true;
1532 return $short ? false : [];
1534 $pubkey = $curlResult->getBody();
1537 $key = explode(".", $pubkey);
1539 if (sizeof($key) >= 3) {
1540 $m = Strings::base64UrlDecode($key[1]);
1541 $e = Strings::base64UrlDecode($key[2]);
1542 $data["pubkey"] = Crypto::meToPem($m, $e);
1548 if (isset($data["notify"]) && isset($data["pubkey"])
1549 && isset($data["poll"])
1550 && isset($data["url"])
1552 $data["network"] = Protocol::OSTATUS;
1553 $data["manually-approve"] = false;
1555 return $short ? false : [];
1562 // Fetch all additional data from the feed
1563 $curlResult = DI::httpRequest()->get($data["poll"]);
1564 if ($curlResult->isTimeout()) {
1565 self::$istimeout = true;
1568 $feed = $curlResult->getBody();
1569 $feed_data = Feed::import($feed);
1574 if (!empty($feed_data["header"]["author-name"])) {
1575 $data["name"] = $feed_data["header"]["author-name"];
1577 if (!empty($feed_data["header"]["author-nick"])) {
1578 $data["nick"] = $feed_data["header"]["author-nick"];
1580 if (!empty($feed_data["header"]["author-avatar"])) {
1581 $data["photo"] = self::fixAvatar($feed_data["header"]["author-avatar"], $data["url"]);
1583 if (!empty($feed_data["header"]["author-id"])) {
1584 $data["alias"] = $feed_data["header"]["author-id"];
1586 if (!empty($feed_data["header"]["author-location"])) {
1587 $data["location"] = $feed_data["header"]["author-location"];
1589 if (!empty($feed_data["header"]["author-about"])) {
1590 $data["about"] = $feed_data["header"]["author-about"];
1592 // OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
1593 // So we take the value that we just fetched, although the other one worked as well
1594 if (!empty($feed_data["header"]["author-link"])) {
1595 $data["url"] = $feed_data["header"]["author-link"];
1598 if ($data["url"] == $data["alias"]) {
1599 $data["alias"] = '';
1602 /// @todo Fetch location and "about" from the feed as well
1607 * Fetch data from a pump.io profile page
1609 * @param string $profile_link Link to the profile page
1611 * @return array profile data
1613 private static function pumpioProfileData($profile_link)
1615 $curlResult = DI::httpRequest()->get($profile_link);
1616 if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
1620 $doc = new DOMDocument();
1621 if (!@$doc->loadHTML($curlResult->getBody())) {
1625 $xpath = new DomXPath($doc);
1629 $data["name"] = $xpath->query("//span[contains(@class, 'p-name')]")->item(0)->nodeValue;
1631 if ($data["name"] == '') {
1632 // This is ugly - but pump.io doesn't seem to know a better way for it
1633 $data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
1634 $pos = strpos($data["name"], chr(10));
1636 $data["name"] = trim(substr($data["name"], 0, $pos));
1640 $data["location"] = XML::getFirstNodeValue($xpath, "//p[contains(@class, 'p-locality')]");
1642 if ($data["location"] == '') {
1643 $data["location"] = XML::getFirstNodeValue($xpath, "//p[contains(@class, 'location')]");
1646 $data["about"] = XML::getFirstNodeValue($xpath, "//p[contains(@class, 'p-note')]");
1648 if ($data["about"] == '') {
1649 $data["about"] = XML::getFirstNodeValue($xpath, "//p[contains(@class, 'summary')]");
1652 $avatar = $xpath->query("//img[contains(@class, 'u-photo')]")->item(0);
1654 $avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
1657 foreach ($avatar->attributes as $attribute) {
1658 if ($attribute->name == "src") {
1659 $data["photo"] = trim($attribute->value);
1668 * Check for pump.io contact
1670 * @param array $webfinger Webfinger data
1671 * @param string $addr
1672 * @return array pump.io data
1674 private static function pumpio($webfinger, $addr)
1677 // The array is reversed to take into account the order of preference for same-rel links
1678 // See: https://tools.ietf.org/html/rfc7033#section-4.4.4
1679 foreach (array_reverse($webfinger["links"]) as $link) {
1680 if (($link["rel"] == "http://webfinger.net/rel/profile-page")
1681 && (($link["type"] ?? "") == "text/html")
1682 && ($link["href"] != "")
1684 $data["url"] = $link["href"];
1685 } elseif (($link["rel"] == "activity-inbox") && ($link["href"] != "")) {
1686 $data["notify"] = $link["href"];
1687 } elseif (($link["rel"] == "activity-outbox") && ($link["href"] != "")) {
1688 $data["poll"] = $link["href"];
1689 } elseif (($link["rel"] == "dialback") && ($link["href"] != "")) {
1690 $data["dialback"] = $link["href"];
1693 if (isset($data["poll"]) && isset($data["notify"])
1694 && isset($data["dialback"])
1695 && isset($data["url"])
1697 // by now we use these fields only for the network type detection
1698 // So we unset all data that isn't used at the moment
1699 unset($data["dialback"]);
1701 $data["network"] = Protocol::PUMPIO;
1706 $profile_data = self::pumpioProfileData($data["url"]);
1708 if (!$profile_data) {
1712 $data = array_merge($data, $profile_data);
1714 if (($addr != '') && ($data['name'] != '')) {
1715 $name = trim(str_replace($addr, '', $data['name']));
1717 $data['name'] = $name;
1725 * Check for twitter contact
1727 * @param string $uri
1729 * @return array twitter data
1731 private static function twitter($uri)
1733 if (preg_match('=([^@]+)@(?:mobile\.)?twitter\.com$=i', $uri, $matches)) {
1734 $nick = $matches[1];
1735 } elseif (preg_match('=^https?://(?:mobile\.)?twitter\.com/(.+)=i', $uri, $matches)) {
1736 $nick = $matches[1];
1742 $data['url'] = 'https://twitter.com/' . $nick;
1743 $data['addr'] = $nick . '@twitter.com';
1744 $data['nick'] = $data['name'] = $nick;
1745 $data['network'] = Protocol::TWITTER;
1746 $data['baseurl'] = 'https://twitter.com';
1752 * Checks HTML page for RSS feed link
1754 * @param string $url Page link
1755 * @param string $body Page body string
1756 * @return string|false Feed link or false if body was invalid HTML document
1758 public static function getFeedLink(string $url, string $body)
1764 $doc = new DOMDocument();
1765 if (!@$doc->loadHTML($body)) {
1769 $xpath = new DOMXPath($doc);
1771 $feedUrl = $xpath->evaluate('string(/html/head/link[@type="application/rss+xml" and @rel="alternate"]/@href)');
1773 $feedUrl = $feedUrl ? self::ensureAbsoluteLinkFromHTMLDoc($feedUrl, $url, $xpath) : '';
1779 * Return an absolute URL in the context of a HTML document retrieved from the provided URL.
1781 * Loosely based on RFC 1808
1783 * @see https://tools.ietf.org/html/rfc1808
1785 * @param string $href The potential relative href found in the HTML document
1786 * @param string $base The HTML document URL
1787 * @param DOMXPath $xpath The HTML document XPath
1790 private static function ensureAbsoluteLinkFromHTMLDoc(string $href, string $base, DOMXPath $xpath)
1792 if (filter_var($href, FILTER_VALIDATE_URL)) {
1796 $base = $xpath->evaluate('string(/html/head/base/@href)') ?: $base;
1798 $baseParts = parse_url($base);
1799 if (empty($baseParts['host'])) {
1803 // Naked domain case (scheme://basehost)
1804 $path = $baseParts['path'] ?? '/';
1806 // Remove the filename part of the path if it exists (/base/path/file)
1807 $path = implode('/', array_slice(explode('/', $path), 0, -1));
1809 $hrefParts = parse_url($href);
1811 if (!empty($hrefParts['path'])) {
1812 // Root path case (/path) including relative scheme case (//host/path)
1813 if ($hrefParts['path'] && $hrefParts['path'][0] == '/') {
1814 $path = $hrefParts['path'];
1816 $path = $path . '/' . $hrefParts['path'];
1818 // Resolve arbitrary relative path
1819 // Lifted from https://www.php.net/manual/en/function.realpath.php#84012
1820 $parts = array_filter(explode('/', $path), 'strlen');
1821 $absolutes = array();
1822 foreach ($parts as $part) {
1823 if ('.' == $part) continue;
1824 if ('..' == $part) {
1825 array_pop($absolutes);
1827 $absolutes[] = $part;
1831 $path = '/' . implode('/', $absolutes);
1835 // Relative scheme case (//host/path)
1836 $baseParts['host'] = $hrefParts['host'] ?? $baseParts['host'];
1837 $baseParts['path'] = $path;
1838 unset($baseParts['query']);
1839 unset($baseParts['fragment']);
1841 return Network::unparseURL($baseParts);
1845 * Check for feed contact
1847 * @param string $url Profile link
1848 * @param boolean $probe Do a probe if the page contains a feed link
1850 * @return array feed data
1851 * @throws HTTPException\InternalServerErrorException
1853 private static function feed($url, $probe = true)
1855 $curlResult = DI::httpRequest()->get($url);
1856 if ($curlResult->isTimeout()) {
1857 self::$istimeout = true;
1860 $feed = $curlResult->getBody();
1861 $feed_data = Feed::import($feed);
1868 $feed_url = self::getFeedLink($url, $feed);
1874 return self::feed($feed_url, false);
1877 if (!empty($feed_data["header"]["author-name"])) {
1878 $data["name"] = $feed_data["header"]["author-name"];
1881 if (!empty($feed_data["header"]["author-nick"])) {
1882 $data["nick"] = $feed_data["header"]["author-nick"];
1885 if (!empty($feed_data["header"]["author-avatar"])) {
1886 $data["photo"] = $feed_data["header"]["author-avatar"];
1889 if (!empty($feed_data["header"]["author-id"])) {
1890 $data["alias"] = $feed_data["header"]["author-id"];
1893 $data["url"] = $url;
1894 $data["poll"] = $url;
1896 $data["network"] = Protocol::FEED;
1902 * Check for mail contact
1904 * @param string $uri Profile link
1905 * @param integer $uid User ID
1907 * @return array mail data
1908 * @throws \Exception
1910 private static function mail($uri, $uid)
1912 if (!Network::isEmailDomainValid($uri)) {
1920 $user = DBA::selectFirst('user', ['prvkey'], ['uid' => $uid]);
1922 $condition = ["`uid` = ? AND `server` != ''", $uid];
1923 $fields = ['pass', 'user', 'server', 'port', 'ssltype', 'mailbox'];
1924 $mailacct = DBA::selectFirst('mailacct', $fields, $condition);
1926 if (!DBA::isResult($user) || !DBA::isResult($mailacct)) {
1930 $mailbox = Email::constructMailboxName($mailacct);
1932 openssl_private_decrypt(hex2bin($mailacct['pass']), $password, $user['prvkey']);
1933 $mbox = Email::connect($mailbox, $mailacct['user'], $password);
1938 $msgs = Email::poll($mbox, $uri);
1939 Logger::info('Messages found', ['uri' => $uri, 'count' => count($msgs)]);
1941 if (!count($msgs)) {
1945 $phost = substr($uri, strpos($uri, '@') + 1);
1948 $data["addr"] = $uri;
1949 $data["network"] = Protocol::MAIL;
1950 $data["name"] = substr($uri, 0, strpos($uri, '@'));
1951 $data["nick"] = $data["name"];
1952 $data["photo"] = Network::lookupAvatarByEmail($uri);
1953 $data["url"] = 'mailto:'.$uri;
1954 $data["notify"] = 'smtp ' . Strings::getRandomHex();
1955 $data["poll"] = 'email ' . Strings::getRandomHex();
1957 $x = Email::messageMeta($mbox, $msgs[0]);
1958 if (stristr($x[0]->from, $uri)) {
1959 $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
1960 } elseif (stristr($x[0]->to, $uri)) {
1961 $adr = imap_rfc822_parse_adrlist($x[0]->to, '');
1964 foreach ($adr as $feadr) {
1965 if ((strcasecmp($feadr->mailbox, $data["name"]) == 0)
1966 &&(strcasecmp($feadr->host, $phost) == 0)
1967 && (strlen($feadr->personal))
1969 $personal = imap_mime_header_decode($feadr->personal);
1971 foreach ($personal as $perspart) {
1972 if ($perspart->charset != "default") {
1973 $data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
1975 $data["name"] .= $perspart->text;
1979 $data["name"] = Strings::escapeTags($data["name"]);
1983 if (!empty($mbox)) {
1990 * Mix two paths together to possibly fix missing parts
1992 * @param string $avatar Path to the avatar
1993 * @param string $base Another path that is hopefully complete
1995 * @return string fixed avatar path
1996 * @throws \Exception
1998 public static function fixAvatar($avatar, $base)
2000 $base_parts = parse_url($base);
2002 // Remove all parts that could create a problem
2003 unset($base_parts['path']);
2004 unset($base_parts['query']);
2005 unset($base_parts['fragment']);
2007 $avatar_parts = parse_url($avatar);
2010 $parts = array_merge($base_parts, $avatar_parts);
2012 // And put them together again
2013 $scheme = isset($parts['scheme']) ? $parts['scheme'] . '://' : '';
2014 $host = isset($parts['host']) ? $parts['host'] : '';
2015 $port = isset($parts['port']) ? ':' . $parts['port'] : '';
2016 $path = isset($parts['path']) ? $parts['path'] : '';
2017 $query = isset($parts['query']) ? '?' . $parts['query'] : '';
2018 $fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
2020 $fixed = $scheme.$host.$port.$path.$query.$fragment;
2022 Logger::debug('Avatar fixed', ['base' => $base, 'avatar' => $avatar, 'fixed' => $fixed]);
2028 * Fetch the last date that the contact had posted something (publically)
2030 * @param string $data probing result
2031 * @return string last activity
2033 public static function getLastUpdate(array $data)
2035 $uid = User::getIdForURL($data['url']);
2037 $contact = Contact::selectFirst(['url', 'last-item'], ['self' => true, 'uid' => $uid]);
2038 if (!empty($contact['last-item'])) {
2039 return $contact['last-item'];
2043 if ($lastUpdate = self::updateFromNoScrape($data)) {
2047 if (!empty($data['outbox'])) {
2048 return self::updateFromOutbox($data['outbox'], $data);
2049 } elseif (!empty($data['poll']) && ($data['network'] == Protocol::ACTIVITYPUB)) {
2050 return self::updateFromOutbox($data['poll'], $data);
2051 } elseif (!empty($data['poll'])) {
2052 return self::updateFromFeed($data);
2059 * Fetch the last activity date from the "noscrape" endpoint
2061 * @param array $data Probing result
2062 * @return string last activity
2064 * @return bool 'true' if update was successful or the server was unreachable
2066 private static function updateFromNoScrape(array $data)
2068 if (empty($data['baseurl'])) {
2072 // Check the 'noscrape' endpoint when it is a Friendica server
2073 $gserver = DBA::selectFirst('gserver', ['noscrape'], ["`nurl` = ? AND `noscrape` != ''",
2074 Strings::normaliseLink($data['baseurl'])]);
2075 if (!DBA::isResult($gserver)) {
2079 $curlResult = DI::httpRequest()->get($gserver['noscrape'] . '/' . $data['nick']);
2081 if ($curlResult->isSuccess() && !empty($curlResult->getBody())) {
2082 $noscrape = json_decode($curlResult->getBody(), true);
2083 if (!empty($noscrape) && !empty($noscrape['updated'])) {
2084 return DateTimeFormat::utc($noscrape['updated'], DateTimeFormat::MYSQL);
2092 * Fetch the last activity date from an ActivityPub Outbox
2094 * @param string $feed
2095 * @param array $data Probing result
2096 * @return string last activity
2097 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2099 private static function updateFromOutbox(string $feed, array $data)
2101 $outbox = ActivityPub::fetchContent($feed);
2102 if (empty($outbox)) {
2106 if (!empty($outbox['orderedItems'])) {
2107 $items = $outbox['orderedItems'];
2108 } elseif (!empty($outbox['first']['orderedItems'])) {
2109 $items = $outbox['first']['orderedItems'];
2110 } elseif (!empty($outbox['first']['href']) && ($outbox['first']['href'] != $feed)) {
2111 return self::updateFromOutbox($outbox['first']['href'], $data);
2112 } elseif (!empty($outbox['first'])) {
2113 if (is_string($outbox['first']) && ($outbox['first'] != $feed)) {
2114 return self::updateFromOutbox($outbox['first'], $data);
2116 Logger::warning('Unexpected data', ['outbox' => $outbox]);
2124 foreach ($items as $activity) {
2125 if (!empty($activity['published'])) {
2126 $published = DateTimeFormat::utc($activity['published']);
2127 } elseif (!empty($activity['object']['published'])) {
2128 $published = DateTimeFormat::utc($activity['object']['published']);
2133 if ($last_updated < $published) {
2134 $last_updated = $published;
2138 if (!empty($last_updated)) {
2139 return $last_updated;
2146 * Fetch the last activity date from an XML feed
2148 * @param array $data Probing result
2149 * @return string last activity
2151 private static function updateFromFeed(array $data)
2153 // Search for the newest entry in the feed
2154 $curlResult = DI::httpRequest()->get($data['poll']);
2155 if (!$curlResult->isSuccess()) {
2159 $doc = new DOMDocument();
2160 @$doc->loadXML($curlResult->getBody());
2162 $xpath = new DOMXPath($doc);
2163 $xpath->registerNamespace('atom', 'http://www.w3.org/2005/Atom');
2165 $entries = $xpath->query('/atom:feed/atom:entry');
2169 foreach ($entries as $entry) {
2170 $published_item = $xpath->query('atom:published/text()', $entry)->item(0);
2171 $updated_item = $xpath->query('atom:updated/text()' , $entry)->item(0);
2172 $published = !empty($published_item->nodeValue) ? DateTimeFormat::utc($published_item->nodeValue) : null;
2173 $updated = !empty($updated_item->nodeValue) ? DateTimeFormat::utc($updated_item->nodeValue) : null;
2175 if (empty($published) || empty($updated)) {
2176 Logger::notice('Invalid entry for XPath.', ['entry' => $entry, 'url' => $data['url']]);
2180 if ($last_updated < $published) {
2181 $last_updated = $published;
2184 if ($last_updated < $updated) {
2185 $last_updated = $updated;
2189 if (!empty($last_updated)) {
2190 return $last_updated;
2197 * Probe data from local profiles without network traffic
2199 * @param string $url
2200 * @return array probed data
2202 private static function localProbe(string $url)
2204 if ($uid = User::getIdForURL($url)) {
2205 $profile = User::getOwnerDataById($uid);
2206 $approfile = ActivityPub\Transmitter::getProfile($uid);
2208 if (empty($profile['gsid'])) {
2209 $profile['gsid'] = GServer::getID($approfile['generator']['url']);
2212 $data = ['name' => $profile['name'], 'nick' => $profile['nick'], 'guid' => $approfile['diaspora:guid'] ?? '',
2213 'url' => $profile['url'], 'addr' => $profile['addr'], 'alias' => $profile['alias'],
2214 'photo' => Contact::getAvatarUrlForId($profile['id'], $profile['updated']),
2215 'header' => $profile['header'] ? Contact::getHeaderUrlForId($profile['id'], $profile['updated']) : '',
2216 'account-type' => $profile['contact-type'], 'community' => ($profile['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY),
2217 'keywords' => $profile['keywords'], 'location' => $profile['location'], 'about' => $profile['about'],
2218 'hide' => !$profile['net-publish'], 'batch' => '', 'notify' => $profile['notify'],
2219 'poll' => $profile['poll'], 'request' => $profile['request'], 'confirm' => $profile['confirm'],
2220 'subscribe' => $approfile['generator']['url'] . '/follow?url={uri}', 'poco' => $profile['poco'],
2221 'following' => $approfile['following'], 'followers' => $approfile['followers'],
2222 'inbox' => $approfile['inbox'], 'outbox' => $approfile['outbox'],
2223 'sharedinbox' => $approfile['endpoints']['sharedInbox'], 'network' => Protocol::DFRN,
2224 'pubkey' => $profile['upubkey'], 'baseurl' => $approfile['generator']['url'], 'gsid' => $profile['gsid'],
2225 'manually-approve' => in_array($profile['page-flags'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_PRVGROUP])];
2227 // Default values for non existing targets
2228 $data = ['name' => $url, 'nick' => $url, 'url' => $url, 'network' => Protocol::PHANTOM,
2229 'photo' => DI::baseUrl() . Contact::DEFAULT_AVATAR_PHOTO];
2231 return self::rearrangeData($data);