80 lines
2.4 KiB
PHP
80 lines
2.4 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* Implementation of discovery using HTML <link> element
|
||
|
|
*
|
||
|
|
* Discovers XRD file for a user by fetching the URL and reading any
|
||
|
|
* <link> elements in the HTML response.
|
||
|
|
*
|
||
|
|
* @category Discovery
|
||
|
|
* @package StatusNet
|
||
|
|
* @author James Walker <james@status.net>
|
||
|
|
* @copyright 2010 StatusNet, Inc.
|
||
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
|
||
|
|
* @link http://status.net/
|
||
|
|
*/
|
||
|
|
class LRDDMethod_LinkHTML extends LRDDMethod
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* For HTTP IDs, fetch the URL and look for <link> elements
|
||
|
|
* in the HTML response.
|
||
|
|
*
|
||
|
|
* @todo fail out of WebFinger URIs faster
|
||
|
|
*/
|
||
|
|
public function discover($uri)
|
||
|
|
{
|
||
|
|
$response = self::fetchUrl($uri);
|
||
|
|
|
||
|
|
return self::parse($response->getBody());
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parse HTML and return <link> elements
|
||
|
|
*
|
||
|
|
* Given an HTML string, scans the string for <link> elements
|
||
|
|
*
|
||
|
|
* @param string $html HTML to scan
|
||
|
|
*
|
||
|
|
* @return array array of associative arrays in JRD-ish array format
|
||
|
|
*/
|
||
|
|
public function parse($html)
|
||
|
|
{
|
||
|
|
$links = array();
|
||
|
|
|
||
|
|
preg_match('/<head(\s[^>]*)?>(.*?)<\/head>/is', $html, $head_matches);
|
||
|
|
$head_html = $head_matches[2];
|
||
|
|
|
||
|
|
preg_match_all('/<link\s[^>]*>/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, $rel_matches);
|
||
|
|
if ( isset($rel_matches[3]) ) {
|
||
|
|
$link_rel = $rel_matches[3];
|
||
|
|
} else if ( isset($rel_matches[1]) ) {
|
||
|
|
$link_rel = $rel_matches[1];
|
||
|
|
}
|
||
|
|
|
||
|
|
preg_match('/\shref=(("|\')([^\\2]*?)\\2|[^"\'\s]+)/i', $link_html, $href_matches);
|
||
|
|
if ( isset($href_matches[3]) ) {
|
||
|
|
$link_uri = $href_matches[3];
|
||
|
|
} else if ( isset($href_matches[1]) ) {
|
||
|
|
$link_uri = $href_matches[1];
|
||
|
|
}
|
||
|
|
|
||
|
|
preg_match('/\stype=(("|\')([^\\2]*?)\\2|[^"\'\s]+)/i', $link_html, $type_matches);
|
||
|
|
if ( isset($type_matches[3]) ) {
|
||
|
|
$link_type = $type_matches[3];
|
||
|
|
} else if ( isset($type_matches[1]) ) {
|
||
|
|
$link_type = $type_matches[1];
|
||
|
|
}
|
||
|
|
|
||
|
|
$links[] = new XML_XRD_Element_Link($link_rel, $link_uri, $link_type);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $links;
|
||
|
|
}
|
||
|
|
}
|