DefaultExceptionSubscriber.php in JSON:API 8

Namespace

Drupal\jsonapi\EventSubscriber

File

src/EventSubscriber/DefaultExceptionSubscriber.php

<?php

namespace Drupal\jsonapi\EventSubscriber;

use Drupal\jsonapi\Routing\Routes;
use Drupal\serialization\EventSubscriber\DefaultExceptionSubscriber as SerializationDefaultExceptionSubscriber;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
use Symfony\Component\HttpKernel\Exception\HttpException;

/**
 * Serializes exceptions in compliance with the  JSON API specification.
 *
 * @internal
 */
class DefaultExceptionSubscriber extends SerializationDefaultExceptionSubscriber {

  /**
   * {@inheritdoc}
   */
  protected static function getPriority() {
    return parent::getPriority() + 25;
  }

  /**
   * {@inheritdoc}
   */
  protected function getHandledFormats() {
    return [
      'api_json',
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function onException(GetResponseForExceptionEvent $event) {
    if (!$this
      ->isJsonApiExceptionEvent($event)) {
      return;
    }
    if (($exception = $event
      ->getException()) && !$exception instanceof HttpException) {
      $exception = new HttpException(500, $exception
        ->getMessage(), $exception);
      $event
        ->setException($exception);
    }
    $this
      ->setEventResponse($event, $exception
      ->getStatusCode());
  }

  /**
   * {@inheritdoc}
   */
  protected function setEventResponse(GetResponseForExceptionEvent $event, $status) {

    /* @var \Symfony\Component\HttpKernel\Exception\HttpException $exception */
    $exception = $event
      ->getException();
    $encoded_content = $this->serializer
      ->serialize($exception, 'api_json', [
      'data_wrapper' => 'errors',
    ]);
    $response = new Response($encoded_content, $status);
    $response->headers
      ->set('Content-Type', 'application/vnd.api+json');
    $event
      ->setResponse($response);
  }

  /**
   * Check if the error should be formatted using JSON API.
   *
   * The JSON API format is supported if the format is explicitly set or the
   * request is for a known JSON API route.
   *
   * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $exception_event
   *   The exception event.
   *
   * @return bool
   *   TRUE if it needs to be formatted using JSON API. FALSE otherwise.
   */
  protected function isJsonApiExceptionEvent(GetResponseForExceptionEvent $exception_event) {
    $request = $exception_event
      ->getRequest();
    $parameters = $request->attributes
      ->all();
    return $request
      ->getRequestFormat() === 'api_json' || (bool) Routes::getResourceTypeNameFromParameters($parameters);
  }

}

Classes

Name	Description
DefaultExceptionSubscriber	Serializes exceptions in compliance with the JSON API specification.