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109 lines
No EOL
2.3 KiB
PHP
109 lines
No EOL
2.3 KiB
PHP
<?php
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namespace Zotlabs\Lib;
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/**
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* @brief Fetch and return a webfinger for a resource
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*
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* @param string $resource - The resource
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* @return boolean|string false or associative array from result JSON
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*/
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class Webfinger {
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static private $server = EMPTY_STR;
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static private $resource = EMPTY_STR;
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static function exec($resource) {
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if (! $resource) {
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return false;
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}
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self::parse_resource($resource);
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if (! ( self::$server && self::$resource)) {
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return false;
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}
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if (! check_siteallowed(self::$server)) {
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logger('denied: ' . self::$server);
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return false;
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}
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logger('fetching resource: ' . self::$resource . ' from ' . self::$server, LOGGER_DEBUG, LOG_INFO);
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$url = 'https://' . self::$server . '/.well-known/webfinger?f=&resource=' . self::$resource ;
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$counter = 0;
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$s = z_fetch_url($url, false, $counter, [ 'headers' => [ 'Accept: application/jrd+json, */*' ] ]);
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if ($s['success']) {
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$j = json_decode($s['body'], true);
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return($j);
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}
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return false;
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}
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static function parse_resource($resource) {
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self::$resource = urlencode($resource);
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if (strpos($resource,'http') === 0) {
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$m = parse_url($resource);
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if ($m) {
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if ($m['scheme'] !== 'https') {
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return false;
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}
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self::$server = $m['host'] . (($m['port']) ? ':' . $m['port'] : '');
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}
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else {
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return false;
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}
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}
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elseif (strpos($resource,'tag:') === 0) {
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$arr = explode(':',$resource); // split the tag
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$h = explode(',',$arr[1]); // split the host,date
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self::$server = $h[0];
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}
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else {
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$x = explode('@',$resource);
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if (! strlen($x[0])) {
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// e.g. @dan@pixelfed.org
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array_shift($x);
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}
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$username = $x[0];
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if (count($x) > 1) {
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self::$server = $x[1];
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}
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else {
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return false;
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}
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if (strpos($resource,'acct:') !== 0) {
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self::$resource = urlencode('acct:' . $resource);
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}
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}
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}
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/**
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* @brief fetch a webfinger resource and return a zot6 discovery url if present
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*
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*/
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static function zot_url($resource) {
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$arr = self::exec($resource);
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if (is_array($arr) && array_key_exists('links',$arr)) {
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foreach ($arr['links'] as $link) {
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if (array_key_exists('rel',$link) && $link['rel'] === PROTOCOL_ZOT6) {
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if (array_key_exists('href',$link) && $link['href'] !== EMPTY_STR) {
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return $link['href'];
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}
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}
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}
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}
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return false;
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}
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} |