/**
* Handles HTTP validation headers.
*/
public function onKernelController(FilterControllerEvent $event)
{
$request = $event->getRequest();
if (!($configuration = $request->attributes->get('_cache'))) {
return;
}
$response = new Response();
$lastModifiedDate = '';
if ($configuration->getLastModified()) {
$lastModifiedDate = $this->getExpressionLanguage()->evaluate($configuration->getLastModified(), $request->attributes->all());
$response->setLastModified($lastModifiedDate);
}
$etag = '';
if ($configuration->getETag()) {
$etag = hash('sha256', $this->getExpressionLanguage()->evaluate($configuration->getETag(), $request->attributes->all()));
$response->setETag($etag);
}
if ($response->isNotModified($request)) {
$event->setController(function () use($response) {
return $response;
});
$event->stopPropagation();
} else {
if ($etag) {
$this->etags[$request] = $etag;
}
if ($lastModifiedDate) {
$this->lastModifiedDates[$request] = $lastModifiedDate;
}
}
}
public function filter(FilterControllerEvent $event, Response $response)
{
if ($this->check($response)) {
$event->setController(function () use($response) {
return $response;
});
$event->stopPropagation();
}
}
/**
* Searches for sluggable objects in the route parameters and checks slugs if necessary.
*
* If an invalid slug is detected, then the user will be redirected to the URLs with the valid slug.
*
* @param FilterControllerEvent $event
*/
public function onKernelController(FilterControllerEvent $event)
{
$attributes = $event->getRequest()->attributes;
foreach ($attributes as $name => $value) {
if ($this->hasValidSlug($attributes, $name)) {
continue;
}
$event->stopPropagation();
// Invalid slug passed. Redirect to a URL with valid slug.
$event->setController(function () use($event, $name) {
return $this->createRedirectFor($event->getRequest(), $name);
});
break;
}
}
/**
* Handle switching the controller and action to the maintenance state.
*/
private function handleMaintenanceState()
{
$this->event->stopPropagation();
$this->event->setController([$this->maintenanceController, 'displayMaintenanceAction']);
}
