public function MethodFilter::filter in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Routing/MethodFilter.php \Drupal\Core\Routing\MethodFilter::filter()

File

core/lib/Drupal/Core/Routing/MethodFilter.php, line 17

Class

MethodFilter

Filters routes based on the HTTP method.

Namespace

Drupal\Core\Routing

Code

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));
}