class AcceptHeaderMiddleware in Drupal 9

Example implementation of "accept header"-based content negotiation.

Hierarchy

• class \Drupal\accept_header_routing_test\AcceptHeaderMiddleware implements \Symfony\Component\HttpKernel\HttpKernelInterface

File

core/modules/system/tests/modules/accept_header_routing_test/src/AcceptHeaderMiddleware.php, line 11

Namespace

Drupal\accept_header_routing_test

class AcceptHeaderMiddleware implements HttpKernelInterface {

  /**
   * Constructs a new AcceptHeaderMiddleware instance.
   *
   * @param \Symfony\Component\HttpKernel\HttpKernelInterface $app
   *   The app.
   */
  public function __construct(HttpKernelInterface $app) {
    $this->app = $app;
  }

  /**
   * {@inheritdoc}
   */
  public function handle(Request $request, $type = self::MASTER_REQUEST, $catch = TRUE) {
    $mapping = [
      'application/json' => 'json',
      'application/hal+json' => 'hal_json',
      'application/xml' => 'xml',
      'text/html' => 'html',
    ];
    $accept = $request->headers
      ->get('Accept') ?: [
      'text/html',
    ];
    if (isset($mapping[$accept[0]])) {
      $request
        ->setRequestFormat($mapping[$accept[0]]);
    }
    return $this->app
      ->handle($request, $type, $catch);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AcceptHeaderMiddleware::handle	public	function
AcceptHeaderMiddleware::__construct	public	function	Constructs a new AcceptHeaderMiddleware instance.