.
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->getBody());
}
/**
* 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;
}
}