/**
* Finds potential feed tags in an HTML document.
*
* @param string $url
* The URL of the document, to use as a base URL.
* @param string $html
* The HTML document to search.
*
* @return string|false
* The URL of the first feed link found, or false if unable to find a link.
*/
public static function findFeed($url, $html)
{
$use_error = libxml_use_internal_errors(TRUE);
$entity_loader = libxml_disable_entity_loader(TRUE);
$dom = new \DOMDocument();
$status = $dom->loadHTML(trim($html));
libxml_disable_entity_loader($entity_loader);
libxml_use_internal_errors($use_error);
if (!$status) {
return FALSE;
}
$feed_set = new FeedSet();
$feed_set->addLinks($dom->getElementsByTagName('link'), $url);
// Load the first feed type found.
foreach (['atom', 'rss', 'rdf'] as $feed_type) {
if (isset($feed_set->{$feed_type})) {
return $feed_set->{$feed_type};
}
}
return FALSE;
}
/**
* Find feed links
*
* @param $uri
* @return FeedSet
* @throws Exception\RuntimeException
*/
public static function findFeedLinks($uri)
{
$client = static::getHttpClient();
$client->setUri($uri);
$response = $client->send();
if ($response->getStatusCode() !== 200) {
throw new Exception\RuntimeException("Failed to access {$uri}, got response code " . $response->getStatusCode());
}
$responseHtml = $response->getBody();
$libxmlErrflag = libxml_use_internal_errors(true);
$oldValue = libxml_disable_entity_loader(true);
$dom = new DOMDocument();
$status = $dom->loadHTML(trim($responseHtml));
libxml_disable_entity_loader($oldValue);
libxml_use_internal_errors($libxmlErrflag);
if (!$status) {
// Build error message
$error = libxml_get_last_error();
if ($error && $error->message) {
$error->message = trim($error->message);
$errormsg = "DOMDocument cannot parse HTML: {$error->message}";
} else {
$errormsg = "DOMDocument cannot parse HTML: Please check the XML document's validity";
}
throw new Exception\RuntimeException($errormsg);
}
$feedSet = new FeedSet();
$links = $dom->getElementsByTagName('link');
$feedSet->addLinks($links, $uri);
return $feedSet;
}
public static function findFeedLinks($uri)
{
$client = self::getHttpClient();
$client->setUri($uri);
$response = $client->request();
if ($response->getStatus() !== 200) {
throw new Exception("Failed to access {$uri}, got response code " . $response->getStatus());
}
$responseHtml = $response->getBody();
$libxml_errflag = libxml_use_internal_errors(true);
$dom = new \DOMDocument();
$status = $dom->loadHTML($responseHtml);
libxml_use_internal_errors($libxml_errflag);
if (!$status) {
$error = libxml_get_last_error();
if ($error && $error->message) {
$errormsg = "\\DOMDocument cannot parse HTML: {$error->message}";
} else {
$errormsg = "\\DOMDocument cannot parse HTML: Please check the XML document's validity";
}
throw new Exception($errormsg);
}
$feedSet = new FeedSet();
$links = $dom->getElementsByTagName('link');
$feedSet->addLinks($links, $uri);
return $feedSet;
}
