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- <?php
- namespace Drupal\Core\StackMiddleware;
- use Symfony\Component\HttpFoundation\Request;
- use Symfony\Component\HttpKernel\HttpKernelInterface;
- /**
- * Provides a middleware to determine the content type upon the accept header.
- *
- * @todo This is a temporary solution, remove this in https://www.drupal.org/node/2364011
- */
- class NegotiationMiddleware implements HttpKernelInterface {
- /**
- * The wrapped HTTP kernel.
- *
- * @var \Symfony\Component\HttpKernel\HttpKernelInterface
- */
- protected $app;
- /**
- * Contains a hashmap of format as key and mimetype as value.
- *
- * @var array
- */
- protected $formats = [];
- /**
- * Constructs a new NegotiationMiddleware.
- *
- * @param \Symfony\Component\HttpKernel\HttpKernelInterface $app
- * The wrapper HTTP kernel
- */
- public function __construct(HttpKernelInterface $app) {
- $this->app = $app;
- }
- /**
- * {@inheritdoc}
- */
- public function handle(Request $request, $type = self::MASTER_REQUEST, $catch = TRUE) {
- // Register available mime types.
- foreach ($this->formats as $format => $mime_type) {
- $request->setFormat($format, $mime_type);
- }
- // Determine the request format using the negotiator.
- if ($requested_format = $this->getContentType($request)) {
- $request->setRequestFormat($requested_format);
- }
- return $this->app->handle($request, $type, $catch);
- }
- /**
- * Registers a format for a given MIME type.
- *
- * @param string $format
- * The format.
- * @param string $mime_type
- * The MIME type.
- *
- * @return $this
- */
- public function registerFormat($format, $mime_type) {
- $this->formats[$format] = $mime_type;
- return $this;
- }
- /**
- * Gets the normalized type of a request.
- *
- * The normalized type is a short, lowercase version of the format, such as
- * 'html', 'json' or 'atom'.
- *
- * @param \Symfony\Component\HttpFoundation\Request $request
- * The request object from which to extract the content type.
- *
- * @return string
- * The normalized type of a given request.
- */
- protected function getContentType(Request $request) {
- // AJAX iframe uploads need special handling, because they contain a JSON
- // response wrapped in <textarea>.
- if ($request->request->get('ajax_iframe_upload', FALSE)) {
- return 'iframeupload';
- }
- if ($request->query->has('_format')) {
- return $request->query->get('_format');
- }
- // No format was specified in the request.
- return NULL;
- }
- }
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