69 lines
1.7 KiB
PHP
69 lines
1.7 KiB
PHP
<?php
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namespace Component\FreeNetwork\Util;
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use App\Core\Event;
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use App\Core\HTTPClient;
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use XML_XRD;
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/**
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* Abstract class for LRDD discovery methods
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*
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* Objects that extend this class can retrieve an array of
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* resource descriptor links for the URI. The array consists
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* of XML_XRD_Element_Link elements.
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*
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* @category Discovery
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* @package StatusNet
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*
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* @author James Walker <james@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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*
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* @see http://status.net/
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*/
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abstract class LrddMethod
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{
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protected $xrd;
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public function __construct()
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{
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$this->xrd = new XML_XRD();
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}
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/**
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* Discover interesting info about the URI
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*
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* @param string $uri URI to inquire about
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*
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* @return array of XML_XRD_Element_Link elements to discovered resource descriptors
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*/
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abstract public function discover($uri);
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protected function fetchUrl($url, $method = HTTPClient::METHOD_GET)
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{
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// If we have a blacklist enabled, let's check against it
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Event::handle('UrlBlacklistTest', [$url]);
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$client = new HTTPClient();
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// GAAHHH, this method sucks! How about we make a better HTTPClient interface?
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switch ($method) {
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case HTTPClient::METHOD_GET:
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$response = $client->get($url);
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break;
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case HTTPClient::METHOD_HEAD:
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$response = $client->head($url);
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break;
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default:
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throw new Exception('Bad HTTP method.');
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}
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if ($response->getStatus() != 200) {
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throw new Exception('Unexpected HTTP status code.');
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}
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return $response;
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}
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}
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