PHP AccessManagerInterface::check方法代码示例

 /**
  * {@inheritdoc}
  */
 public function isValid($path)
 {
     // External URLs and the front page are always valid.
     if ($path == '<front>' || UrlHelper::isExternal($path)) {
         return TRUE;
     }
     // Check the routing system.
     $collection = $this->routeProvider->getRoutesByPattern('/' . $path);
     if ($collection->count() == 0) {
         return FALSE;
     }
     $request = RequestHelper::duplicate($this->requestStack->getCurrentRequest(), '/' . $path);
     $request->attributes->set('_system_path', $path);
     // We indicate that a menu administrator is running the menu access check.
     $request->attributes->set('_menu_admin', TRUE);
     // Attempt to match this path to provide a fully built request to the
     // access checker.
     try {
         $request->attributes->add($this->requestMatcher->matchRequest($request));
     } catch (ParamNotConvertedException $e) {
         return FALSE;
     }
     // Consult the access manager.
     $routes = $collection->all();
     $route = reset($routes);
     return $this->accessManager->check($route, $request, $this->account);
 }

 /**
  * Verifies that the current user can access the requested path.
  *
  * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event
  *   The Event to process.
  *
  * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
  *   Thrown when the access got denied.
  */
 public function onKernelRequestAccessCheck(GetResponseEvent $event)
 {
     $request = $event->getRequest();
     // The controller is being handled by the HTTP kernel, so add an attribute
     // to tell us this is the controller request.
     $request->attributes->set('_controller_request', TRUE);
     if (!$request->attributes->has(RouteObjectInterface::ROUTE_OBJECT)) {
         // If no Route is available it is likely a static resource and access is
         // handled elsewhere.
         return;
     }
     // Wrap this in a try/catch to ensure the '_controller_request' attribute
     // can always be removed.
     try {
         $access = $this->accessManager->check($request->attributes->get(RouteObjectInterface::ROUTE_OBJECT), $request, $this->currentUser);
     } catch (\Exception $e) {
         $request->attributes->remove('_controller_request');
         throw $e;
     }
     $request->attributes->remove('_controller_request');
     if (!$access) {
         throw new AccessDeniedHttpException();
     }
 }

 /**
  * {@inheritdoc}
  */
 public function build(RouteMatchInterface $route_match)
 {
     $breadcrumb = new Breadcrumb();
     $links = array();
     // General path-based breadcrumbs. Use the actual request path, prior to
     // resolving path aliases, so the breadcrumb can be defined by simply
     // creating a hierarchy of path aliases.
     $path = trim($this->context->getPathInfo(), '/');
     $path_elements = explode('/', $path);
     $exclude = array();
     // Don't show a link to the front-page path.
     $front = $this->config->get('page.front');
     $exclude[$front] = TRUE;
     // /user is just a redirect, so skip it.
     // @todo Find a better way to deal with /user.
     $exclude['/user'] = TRUE;
     // Because this breadcrumb builder is entirely path-based, vary by the
     // 'url.path' cache context.
     $breadcrumb->addCacheContexts(['url.path']);
     while (count($path_elements) > 1) {
         array_pop($path_elements);
         // Copy the path elements for up-casting.
         $route_request = $this->getRequestForPath('/' . implode('/', $path_elements), $exclude);
         if ($route_request) {
             $route_match = RouteMatch::createFromRequest($route_request);
             $access = $this->accessManager->check($route_match, $this->currentUser, NULL, TRUE);
             // The set of breadcrumb links depends on the access result, so merge
             // the access result's cacheability metadata.
             $breadcrumb = $breadcrumb->addCacheableDependency($access);
             if ($access->isAllowed()) {
                 $title = $this->titleResolver->getTitle($route_request, $route_match->getRouteObject());
                 if (!isset($title)) {
                     // Fallback to using the raw path component as the title if the
                     // route is missing a _title or _title_callback attribute.
                     $title = str_replace(array('-', '_'), ' ', Unicode::ucfirst(end($path_elements)));
                 }
                 $url = Url::fromRouteMatch($route_match);
                 $links[] = new Link($title, $url);
             }
         }
     }
     if ($path && '/' . $path != $front) {
         // Add the Home link, except for the front page.
         $links[] = Link::createFromRoute($this->t('Home'), '<front>');
     }
     return $breadcrumb->setLinks(array_reverse($links));
 }