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- <?php
- namespace Drupal\Core\Routing;
- use Symfony\Component\HttpFoundation\Request;
- use Symfony\Component\Routing\Exception\MethodNotAllowedException;
- use Symfony\Component\Routing\RouteCollection;
- /**
- * Filters routes based on the HTTP method.
- */
- class MethodFilter implements FilterInterface {
- /**
- * {@inheritdoc}
- */
- public function filter(RouteCollection $collection, Request $request) {
- $method = $request->getMethod();
- $all_supported_methods = [];
- foreach ($collection->all() as $name => $route) {
- $supported_methods = $route->getMethods();
- // A route not restricted to specific methods allows any method. If this
- // is the case, we'll also have at least one route left in the collection,
- // hence we don't need to calculate the set of all supported methods.
- if (empty($supported_methods)) {
- continue;
- }
- // If the GET method is allowed we also need to allow the HEAD method
- // since HEAD is a GET method that doesn't return the body.
- if (in_array('GET', $supported_methods, TRUE)) {
- $supported_methods[] = 'HEAD';
- }
- if (!in_array($method, $supported_methods, TRUE)) {
- $all_supported_methods = array_merge($supported_methods, $all_supported_methods);
- $collection->remove($name);
- }
- }
- if (count($collection)) {
- return $collection;
- }
- throw new MethodNotAllowedException(array_unique($all_supported_methods));
- }
- }
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