51 lines
1.4 KiB
PHP
51 lines
1.4 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* Implementation of discovery using HTTP Link header
|
||
|
|
*
|
||
|
|
* Discovers XRD file for a user by fetching the URL and reading any
|
||
|
|
* Link: headers in the HTTP 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_LinkHeader extends LRDDMethod
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* For HTTP IDs fetch the URL and look for Link headers.
|
||
|
|
*
|
||
|
|
* @todo fail out of WebFinger URIs faster
|
||
|
|
*/
|
||
|
|
public function discover($uri)
|
||
|
|
{
|
||
|
|
$response = self::fetchUrl($uri, HTTPClient::METHOD_HEAD);
|
||
|
|
|
||
|
|
$link_header = $response->getHeader('Link');
|
||
|
|
if (empty($link_header)) {
|
||
|
|
throw new Exception('No Link header found');
|
||
|
|
}
|
||
|
|
common_debug('LRDD LinkHeader found: '.var_export($link_header,true));
|
||
|
|
|
||
|
|
return self::parseHeader($link_header);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Given a string or array of headers, returns JRD-like assoc array
|
||
|
|
*
|
||
|
|
* @param string|array $header string or array of strings for headers
|
||
|
|
*
|
||
|
|
* @return array of associative arrays in JRD-like array format
|
||
|
|
*/
|
||
|
|
protected static function parseHeader($header)
|
||
|
|
{
|
||
|
|
$lh = new LinkHeader($header);
|
||
|
|
|
||
|
|
$link = new XML_XRD_Element_Link($lh->rel, $lh->href, $lh->type);
|
||
|
|
|
||
|
|
return array($link);
|
||
|
|
}
|
||
|
|
}
|