/**
* Simple utility function which imports any feed URL and
* determines the existence of Hub Server endpoints. This works
* best if directly given an instance of Zend_Feed_Reader_Atom|Rss
* to leverage off.
*
* @param Zend_Feed_Reader_FeedAbstract|Zend_Feed_Abstract|string $source
* @return array
*/
public static function detectHubs($source)
{
if (is_string($source)) {
$feed = Zend_Feed_Reader::import($source);
} elseif (is_object($source) && $source instanceof Zend_Feed_Reader_FeedAbstract) {
$feed = $source;
} elseif (is_object($source) && $source instanceof Zend_Feed_Abstract) {
$feed = Zend_Feed_Reader::importFeed($source);
} else {
throw new Zend_Feed_Pubsubhubbub_Exception('The source parameter was' . ' invalid, i.e. not a URL string or an instance of type' . ' Zend_Feed_Reader_FeedAbstract or Zend_Feed_Abstract');
}
return $feed->getHubs();
}
/**
* Simple utility function which imports any feed URL and
* determines the existence of Hub Server endpoints. This works
* best if directly given an instance of Zend_Feed_Reader_Atom|Rss
* to leverage off.
*
* @param Zend_Feed_Reader_FeedAbstract|Zend_Feed_Abstract|string $source
*/
public static function detectHubs($source)
{
if (is_string($source)) {
$feed = Zend_Feed_Reader::import($source);
} elseif (is_object($source) && $source instanceof Zend_Feed_Reader_FeedAbstract) {
$feed = $source;
} elseif (is_object($source) && $source instanceof Zend_Feed_Abstract) {
$feed = Zend_Feed_Reader::importFeed($source);
} else {
require_once 'Zend/Feed/Pubsubhubbub/Exception.php';
throw new Zend_Feed_Pubsubhubbub_Exception('The source parameter was' . ' invalid, i.e. not a URL string or an instance of type' . ' Zend_Feed_Reader_FeedAbstract or Zend_Feed_Abstract');
}
$atom = $feed->getExtension('Atom');
$hubs = array();
$list = $atom->getXpath()->evaluate($atom->getXpathPrefix() . '//atom:link[@rel="hub"]/@href');
if ($list->length) {
foreach ($list as $url) {
$hubs[] = $url->nodeValue;
}
}
return $hubs;
}
