protected function getRequestForPath($path, array $exclude) {
    if (!empty($exclude[$path])) {
      return NULL;
    }
    // @todo Use the RequestHelper once https://www.drupal.org/node/2090293 is
    //   fixed.
    $request = Request::create($path);
    // Performance optimization: set a short accept header to reduce overhead in
    // AcceptHeaderMatcher when matching the request.
    $request->headers->set('Accept', 'text/html');
    // Find the system path by resolving aliases, language prefix, etc.
    $processed = $this->pathProcessor->processInbound($path, $request);
    if (empty($processed) || !empty($exclude[$processed])) {
      // This resolves to the front page, which we already add.
      return NULL;
    }
    $this->currentPath->setPath($processed, $request);
    // Attempt to match this path to provide a fully built request.
    try {
      $request->attributes->add($this->router->matchRequest($request));
      return $request;
    }
    catch (ParamNotConvertedException $e) {
      return NULL;
    }
    catch (ResourceNotFoundException $e) {
      return NULL;
    }
    catch (MethodNotAllowedException $e) {
      return NULL;
    }
    catch (AccessDeniedHttpException $e) {
      return NULL;
    }
  }