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- <?php
- namespace Drupal\Core\Routing;
- use Symfony\Component\HttpFoundation\Request;
- use Symfony\Component\HttpKernel\Exception\UnsupportedMediaTypeHttpException;
- use Symfony\Component\Routing\RouteCollection;
- /**
- * Filters routes based on the HTTP Content-type header.
- */
- class ContentTypeHeaderMatcher implements FilterInterface {
- /**
- * {@inheritdoc}
- */
- public function filter(RouteCollection $collection, Request $request) {
- // The Content-type header does not make sense on GET requests, because GET
- // requests do not carry any content. Nothing to filter in this case. Same
- // for all other safe methods.
- if ($request->isMethodSafe(FALSE)) {
- return $collection;
- }
- $format = $request->getContentType();
- foreach ($collection as $name => $route) {
- $supported_formats = array_filter(explode('|', $route->getRequirement('_content_type_format')));
- if (empty($supported_formats)) {
- // No restriction on the route, so we move the route to the end of the
- // collection by re-adding it. That way generic routes sink down in the
- // list and exact matching routes stay on top.
- $collection->add($name, $route);
- }
- elseif (!in_array($format, $supported_formats)) {
- $collection->remove($name);
- }
- }
- if (count($collection)) {
- return $collection;
- }
- // We do not throw a
- // \Symfony\Component\Routing\Exception\ResourceNotFoundException here
- // because we don't want to return a 404 status code, but rather a 415.
- if (!$request->headers->has('Content-Type')) {
- throw new UnsupportedMediaTypeHttpException('No "Content-Type" request header specified');
- }
- else {
- throw new UnsupportedMediaTypeHttpException('No route found that matches "Content-Type: ' . $request->headers->get('Content-Type') . '"');
- }
- }
- }
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