. use Component\FreeNetwork\Util\LrddMethod; use XML_XRD_Element_Link; /** * Implementation of discovery using HTML element * * Discovers XRD file for a user by fetching the URL and reading any * elements in the HTML response. * * @category Discovery * @package GNUsocial * * @author James Walker * @copyright 2010 StatusNet, Inc. * @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later */ class LrddMethodLinkHtml extends LRDDMethod { /** * For HTTP IDs, fetch the URL and look for elements * in the HTML response. * * @param mixed $uri * * @todo fail out of WebFinger URIs faster * */ public function discover($uri) { $response = self::fetchUrl($uri); return self::parse($response->getContent()); } /** * Parse HTML and return elements * * Given an HTML string, scans the string for elements * * @param string $html HTML to scan * * @return array array of associative arrays in JRD-ish array format */ public function parse($html) { $links = []; preg_match('/]*)?>(.*?)<\/head>/is', $html, $head_matches); if (count($head_matches) != 3) { return []; } [, , $head_html] = $head_matches; preg_match_all('/]*>/i', $head_html, $link_matches); foreach ($link_matches[0] as $link_html) { $link_url = null; $link_rel = null; $link_type = null; preg_match('/\srel=(("|\')([^\\2]*?)\\2|[^"\'\s]+)/i', $link_html, $rel_matches); if (count($rel_matches) > 3) { $link_rel = $rel_matches[3]; } elseif (count($rel_matches) > 1) { $link_rel = $rel_matches[1]; } preg_match('/\shref=(("|\')([^\\2]*?)\\2|[^"\'\s]+)/i', $link_html, $href_matches); if (count($href_matches) > 3) { $link_uri = $href_matches[3]; } elseif (count($href_matches) > 1) { $link_uri = $href_matches[1]; } preg_match('/\stype=(("|\')([^\\2]*?)\\2|[^"\'\s]+)/i', $link_html, $type_matches); if (count($type_matches) > 3) { $link_type = $type_matches[3]; } elseif (count($type_matches) > 1) { $link_type = $type_matches[1]; } $links[] = new XML_XRD_Element_Link($link_rel, $link_uri, $link_type); } return $links; } }