function JsonapiMaintenanceModeSubscriber::onMaintenanceModeRequest

Returns response when site is in maintenance mode and user is not exempt.

Parameters

\Symfony\Component\HttpKernel\Event\RequestEvent $event: The event to process.

File

core/modules/jsonapi/src/EventSubscriber/JsonapiMaintenanceModeSubscriber.php, line 70

Class

JsonapiMaintenanceModeSubscriber

Maintenance mode subscriber for JSON:API requests.

Namespace

Drupal\jsonapi\EventSubscriber

Code

public function onMaintenanceModeRequest(RequestEvent $event) {
    $request = $event->getRequest();
    if ($request->getRequestFormat() !== 'api_json') {
        return;
    }
    // Retry-After will be random within a range defined in jsonapi settings.
    // The goals are to keep it short and to reduce the thundering herd problem.
    $header_settings = $this->config
        ->get('jsonapi.settings')
        ->get('maintenance_header_retry_seconds');
    $retry_after_time = rand($header_settings['min'], $header_settings['max']);
    $http_exception = new HttpException(503, $this->maintenanceMode
        ->getSiteMaintenanceMessage());
    $document = new JsonApiDocumentTopLevel(new ErrorCollection([
        $http_exception,
    ]), new NullIncludedData(), new LinkCollection([]));
    $response = new ResourceResponse($document, $http_exception->getStatusCode(), [
        'Content-Type' => 'application/vnd.api+json',
        'Retry-After' => $retry_after_time,
    ]);
    // Calling RequestEvent::setResponse() also stops propagation of event.
    $event->setResponse($response);
}