gnu-social/components/FreeNetwork/Util/LrddMethod.php

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<?php
namespace Component\FreeNetwork\Util;
use App\Core\Event;
use App\Core\HTTPClient;
use XML_XRD;
/**
* Abstract class for LRDD discovery methods
*
* Objects that extend this class can retrieve an array of
* resource descriptor links for the URI. The array consists
* of XML_XRD_Element_Link elements.
*
* @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
*
* @see http://status.net/
*/
abstract class LrddMethod
{
protected $xrd;
public function __construct()
{
$this->xrd = new XML_XRD();
}
/**
* Discover interesting info about the URI
*
* @param string $uri URI to inquire about
*
* @return array of XML_XRD_Element_Link elements to discovered resource descriptors
*/
abstract public function discover($uri);
protected function fetchUrl($url, $method = HTTPClient::METHOD_GET)
{
// If we have a blacklist enabled, let's check against it
Event::handle('UrlBlacklistTest', [$url]);
$client = new HTTPClient();
// GAAHHH, this method sucks! How about we make a better HTTPClient interface?
switch ($method) {
case HTTPClient::METHOD_GET:
$response = $client->get($url);
break;
case HTTPClient::METHOD_HEAD:
$response = $client->head($url);
break;
default:
throw new Exception('Bad HTTP method.');
}
if ($response->getStatus() != 200) {
throw new Exception('Unexpected HTTP status code.');
}
return $response;
}
}