class RssResponseRelativeUrlFilter in Drupal 9
Same name and namespace in other branches
- 8 core/lib/Drupal/Core/EventSubscriber/RssResponseRelativeUrlFilter.php \Drupal\Core\EventSubscriber\RssResponseRelativeUrlFilter
Subscribes to filter RSS responses, to make relative URIs absolute.
Hierarchy
- class \Drupal\Core\EventSubscriber\RssResponseRelativeUrlFilter implements \Symfony\Component\EventDispatcher\EventSubscriberInterface
Expanded class hierarchy of RssResponseRelativeUrlFilter
1 file declares its use of RssResponseRelativeUrlFilter
- RssResponseRelativeUrlFilterTest.php in core/
tests/ Drupal/ Tests/ Core/ EventSubscriber/ RssResponseRelativeUrlFilterTest.php
1 string reference to 'RssResponseRelativeUrlFilter'
- core.services.yml in core/
core.services.yml - core/core.services.yml
1 service uses RssResponseRelativeUrlFilter
File
- core/
lib/ Drupal/ Core/ EventSubscriber/ RssResponseRelativeUrlFilter.php, line 14
Namespace
Drupal\Core\EventSubscriberView source
class RssResponseRelativeUrlFilter implements EventSubscriberInterface {
/**
* Converts relative URLs to absolute URLs.
*
* @param \Symfony\Component\HttpKernel\Event\ResponseEvent $event
* The response event.
*/
public function onResponse(ResponseEvent $event) {
// Only care about RSS responses.
if (stripos($event
->getResponse()->headers
->get('Content-Type'), 'application/rss+xml') === FALSE) {
return;
}
$response = $event
->getResponse();
$response
->setContent($this
->transformRootRelativeUrlsToAbsolute($response
->getContent(), $event
->getRequest()));
}
/**
* Converts all root-relative URLs to absolute URLs in RSS markup.
*
* Does not change any existing protocol-relative or absolute URLs.
*
* @param string $rss_markup
* The RSS markup to update.
* @param \Symfony\Component\HttpFoundation\Request $request
* The current request.
*
* @return string
* The updated RSS markup.
*/
protected function transformRootRelativeUrlsToAbsolute($rss_markup, Request $request) {
$rss_dom = new \DOMDocument();
// Load the RSS, if there are parsing errors, abort and return the unchanged
// markup.
$previous_value = libxml_use_internal_errors(TRUE);
$rss_dom
->loadXML($rss_markup);
$errors = libxml_get_errors();
libxml_use_internal_errors($previous_value);
if ($errors) {
return $rss_markup;
}
// Invoke Html::transformRootRelativeUrlsToAbsolute() on all HTML content
// embedded in this RSS feed.
foreach ($rss_dom
->getElementsByTagName('description') as $node) {
$html_markup = $node->nodeValue;
if (!empty($html_markup)) {
$node->nodeValue = Html::transformRootRelativeUrlsToAbsolute($html_markup, $request
->getSchemeAndHttpHost());
}
}
return $rss_dom
->saveXML();
}
/**
* {@inheritdoc}
*/
public static function getSubscribedEvents() {
// Should run after any other response subscriber that modifies the markup.
// @see \Drupal\Core\EventSubscriber\ActiveLinkResponseFilter
$events[KernelEvents::RESPONSE][] = [
'onResponse',
-512,
];
return $events;
}
}
Members
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
RssResponseRelativeUrlFilter:: |
public static | function | ||
RssResponseRelativeUrlFilter:: |
public | function | Converts relative URLs to absolute URLs. | |
RssResponseRelativeUrlFilter:: |
protected | function | Converts all root-relative URLs to absolute URLs in RSS markup. |