Issue #2323721 by dawehner, chx: Fixed [sechole] Link field item and menu link information leakage.

core/core.services.yml

@@ -506,7 +506,7 @@ services:
     arguments: ['@config.factory']
   path.validator:
     class: Drupal\Core\Path\PathValidator
-    arguments: ['@router', '@router.route_provider', '@request_stack']
+    arguments: ['@router', '@router.no_access_checks', '@current_user', '@path_processor_manager']
 
 # The argument to the hashing service defined in services.yml, to the
 # constructor of PhpassHashedPassword is the log2 number of iterations for

core/lib/Drupal.php

@@ -666,4 +666,13 @@ public static function menuTree() {
     return static::$container->get('menu.link_tree');
   }
 
+  /**
+   * Returns the path validator.
+   *
+   * @return \Drupal\Core\Path\PathValidatorInterface
+   */
+  public static function pathValidator() {
+    return static::$container->get('path.validator');
+  }
+
 }

core/lib/Drupal/Component/Utility/UrlHelper.php

@@ -151,7 +151,12 @@ public static function parse($url) {
     if (strpos($url, '://') !== FALSE) {
       // Split off everything before the query string into 'path'.
       $parts = explode('?', $url);
-      $options['path'] = $parts[0];
+
+      // Don't support URLs without a path, like 'http://'.
+      list(, $path) = explode('://', $parts[0], 2);
+      if ($path != '') {
+        $options['path'] = $parts[0];
+      }
       // If there is a query string, transform it into keyed query parameters.
       if (isset($parts[1])) {
         $query_parts = explode('#', $parts[1]);

core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php

@@ -8,6 +8,7 @@
 namespace Drupal\Core\Menu;
 
 use Drupal\Core\Access\AccessManagerInterface;
+use Drupal\Core\Path\PathValidator;
 use Drupal\Core\Session\AccountInterface;
 
 /**
@@ -93,6 +94,9 @@ public function checkAccess(array $tree) {
    *   TRUE if the current user can access the link, FALSE otherwise.
    */
   protected function menuLinkCheckAccess(MenuLinkInterface $instance) {
+    if ($this->account->hasPermission('link to any page')) {
+      return TRUE;
+    }
     // Use the definition here since that's a lot faster than creating a Url
     // object that we don't need.
     $definition = $instance->getPluginDefinition();

core/lib/Drupal/Core/Path/PathValidator.php

@@ -2,18 +2,22 @@
 
 /**
  * @file
- * Contains Drupal\Core\Path\PathValidator
+ * Contains \Drupal\Core\Path\PathValidator
  */
 
 namespace Drupal\Core\Path;
 
 use Drupal\Component\Utility\UrlHelper;
 use Drupal\Core\ParamConverter\ParamNotConvertedException;
-use Drupal\Core\Routing\RequestHelper;
-use Drupal\Core\Routing\RouteProviderInterface;
-use Symfony\Component\HttpFoundation\RequestStack;
+use Drupal\Core\PathProcessor\InboundPathProcessorInterface;
+use Drupal\Core\Routing\AccessAwareRouterInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\Core\Url;
+use Symfony\Cmf\Component\Routing\RouteObjectInterface;
+use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
-use Symfony\Component\Routing\Matcher\RequestMatcherInterface;
+use Symfony\Component\Routing\Exception\ResourceNotFoundException;
+use Symfony\Component\Routing\Matcher\UrlMatcherInterface;
 
 /**
  * Provides a default path validator and access checker.
@@ -21,66 +25,122 @@
 class PathValidator implements PathValidatorInterface {
 
   /**
-   * The request matcher.
+   * The access aware router.
    *
-   * @var \Symfony\Component\Routing\Matcher\RequestMatcherInterface
+   * @var \Drupal\Core\Routing\AccessAwareRouterInterface
    */
-  protected $requestMatcher;
+  protected $accessAwareRouter;
 
   /**
-   * The route provider.
+   * A router implementation which does not check access.
    *
-   * @var \Drupal\Core\Routing\RouteProviderInterface
+   * @var \Symfony\Component\Routing\Matcher\UrlMatcherInterface
    */
-  protected $routeProvider;
+  protected $accessUnawareRouter;
 
   /**
-   * The request stack.
+   * The current user.
    *
-   * @var \Symfony\Component\HttpFoundation\RequestStack
+   * @var \Drupal\Core\Session\AccountInterface
    */
-  protected $requestStack;
+  protected $account;
+
+  /**
+   * The path processor.
+   *
+   * @var \Drupal\Core\PathProcessor\InboundPathProcessorInterface
+   */
+  protected $pathProcessor;
 
   /**
    * Creates a new PathValidator.
    *
-   * @param \Symfony\Component\Routing\Matcher\RequestMatcherInterface $request_matcher
-   *   The request matcher.
-   * @param \Drupal\Core\Routing\RouteProviderInterface $route_provider
-   *   The route provider.
-   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
-   *   The request stack.
+   * @param \Drupal\Core\Routing\AccessAwareRouterInterface $access_aware_router
+   *   The access aware router.
+   * @param \Symfony\Component\Routing\Matcher\UrlMatcherInterface $access_unaware_router
+   *   A router implementation which does not check access.
+   * @param \Drupal\Core\Session\AccountInterface $account
+   *   The current user.
+   * @param \Drupal\Core\PathProcessor\InboundPathProcessorInterface $path_processor
+   *   The path processor;
    */
-  public function __construct(RequestMatcherInterface $request_matcher, RouteProviderInterface $route_provider, RequestStack $request_stack) {
-    $this->requestMatcher = $request_matcher;
-    $this->routeProvider = $route_provider;
-    $this->requestStack = $request_stack;
+  public function __construct(AccessAwareRouterInterface $access_aware_router, UrlMatcherInterface $access_unaware_router, AccountInterface $account, InboundPathProcessorInterface $path_processor) {
+    $this->accessAwareRouter = $access_aware_router;
+    $this->accessUnawareRouter = $access_unaware_router;
+    $this->account = $account;
+    $this->pathProcessor = $path_processor;
   }
 
   /**
    * {@inheritdoc}
    */
   public function isValid($path) {
-    // External URLs and the front page are always valid.
-    if ($path == '<front>' || UrlHelper::isExternal($path)) {
-      return TRUE;
+    return (bool) $this->getUrlIfValid($path);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getUrlIfValid($path) {
+    $parsed_url = UrlHelper::parse($path);
+
+    $options = [];
+    if (!empty($parsed_url['query'])) {
+      $options['query'] = $parsed_url['query'];
+    }
+    if (!empty($parsed_url['fragment'])) {
+      $options['fragment'] = $parsed_url['fragment'];
+    }
+
+    if ($parsed_url['path'] == '<front>') {
+      return new Url('<front>', [], $options);
+    }
+    elseif (UrlHelper::isExternal($path) && UrlHelper::isValid($path)) {
+      if (empty($parsed_url['path'])) {
+        return FALSE;
+      }
+      return Url::createFromPath($path);
     }
 
-    // Check the routing system.
-    $collection = $this->routeProvider->getRoutesByPattern('/' . $path);
-    if ($collection->count() == 0) {
+    $request = Request::create('/' . $path);
+    $attributes = $this->getPathAttributes($path, $request);
+
+    if (!$attributes) {
       return FALSE;
     }
 
-    // We can not use $this->requestMatcher->match() because we need to set
-    // the _menu_admin attribute to indicate a menu administrator is running
-    // the menu access check.
-    $request = RequestHelper::duplicate($this->requestStack->getCurrentRequest(), '/' . $path);
-    $request->attributes->set('_system_path', $path);
-    $request->attributes->set('_menu_admin', TRUE);
+    $route_name = $attributes[RouteObjectInterface::ROUTE_NAME];
+    $route_parameters = $attributes['_raw_variables']->all();
+
+    return new Url($route_name, $route_parameters, $options + ['query' => $request->query->all()]);
+  }
+
+  /**
+   * Gets the matched attributes for a given path.
+   *
+   * @param string $path
+   *   The path to check.
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   A request object with the given path.
+   *
+   * @return array|bool
+   *   An array of request attributes of FALSE if an exception was thrown.
+   */
+  protected function getPathAttributes($path, Request $request) {
+    if ($this->account->hasPermission('link to any page')) {
+      $router = $this->accessUnawareRouter;
+    }
+    else {
+      $router = $this->accessAwareRouter;
+    }
+
+    $path = $this->pathProcessor->processInbound($path, $request);
 
     try {
-      $this->requestMatcher->matchRequest($request);
+      return $router->match('/' . $path);
+    }
+    catch (ResourceNotFoundException $e) {
+      return FALSE;
     }
     catch (ParamNotConvertedException $e) {
       return FALSE;
@@ -88,7 +148,6 @@ public function isValid($path) {
     catch (AccessDeniedHttpException $e) {
       return FALSE;
     }
-    return TRUE;
   }
 
 }

core/lib/Drupal/Core/Path/PathValidatorInterface.php

@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\Core\Path\PathValidatorInterface
+ * Contains \Drupal\Core\Path\PathValidatorInterface
  */
 
 namespace Drupal\Core\Path;
@@ -12,6 +12,17 @@
  */
 interface PathValidatorInterface {
 
+  /**
+   * Returns an URL object, if the path is valid and accessible.
+   *
+   * @param string $path
+   *   The path to check.
+   *
+   * @return \Drupal\Core\Url|false
+   *   The url object, or FALSE if the path is not valid.
+   */
+  public function getUrlIfValid($path);
+
   /**
    * Checks if the URL path is valid and accessible by the current user.
    *

core/lib/Drupal/Core/PathProcessor/InboundPathProcessorInterface.php

@@ -22,6 +22,9 @@ interface InboundPathProcessorInterface {
    *
    * @param \Symfony\Component\HttpFoundation\Request $request
    *   The HttpRequest object representing the current request.
+   *
+   * @return string
+   *   The processed path.
    */
   public function processInbound($path, Request $request);
 

core/lib/Drupal/Core/Url.php

@@ -9,11 +9,9 @@
 
 use Drupal\Component\Utility\UrlHelper;
 use Drupal\Core\DependencyInjection\DependencySerializationTrait;
-use Drupal\Core\Routing\MatchingRouteNotFoundException;
 use Drupal\Core\Routing\UrlGeneratorInterface;
 use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\Routing\Exception\ResourceNotFoundException;
 
 /**
  * Defines an object that holds information about a URL.
@@ -97,7 +95,15 @@ public function __construct($route_name, $route_parameters = array(), $options =
   }
 
   /**
-   * Returns the Url object matching a path.
+   * Returns the Url object matching a path. READ THE FOLLOWING SECURITY NOTE.
+   *
+   * SECURITY NOTE: The path is not checked to be valid and accessible by the
+   * current user to allow storing and reusing Url objects by different users.
+   * The 'path.validator' service getUrlIfValid() method should be used instead
+   * of this one if validation and access check is desired. Otherwise,
+   * 'access_manager' service checkNamedRoute() method should be used on the
+   * router name and parameters stored in the Url object returned by this
+   * method.
    *
    * @param string $path
    *   A path (e.g. 'node/1', 'http://drupal.org').
@@ -118,27 +124,15 @@ public static function createFromPath($path) {
 
     // Special case the front page route.
     if ($path == '<front>') {
-      $route_name = $path;
-      $route_parameters = array();
+      return new static($path);
     }
     else {
-      // Look up the route name and parameters used for the given path.
-      try {
-        // We use the router without access checks because URL objects might be
-        // created and stored for different users.
-        $result = \Drupal::service('router.no_access_checks')->match('/' . $path);
-      }
-      catch (ResourceNotFoundException $e) {
-        throw new MatchingRouteNotFoundException(sprintf('No matching route could be found for the path "%s"', $path), 0, $e);
-      }
-      $route_name = $result[RouteObjectInterface::ROUTE_NAME];
-      $route_parameters = $result['_raw_variables']->all();
+      return static::createFromRequest(Request::create("/$path"));
     }
-    return new static($route_name, $route_parameters);
   }
 
   /**
-   * Returns the Url object matching a request.
+   * Returns the Url object matching a request. READ THE SECURITY NOTE ON createFromPath().
    *
    * @param \Symfony\Component\HttpFoundation\Request $request
    *   A request object.
@@ -152,14 +146,9 @@ public static function createFromPath($path) {
    *   Thrown when the request cannot be matched.
    */
   public static function createFromRequest(Request $request) {
-    try {
-      // We use the router without access checks because URL objects might be
-      // created and stored for different users.
-      $result = \Drupal::service('router.no_access_checks')->matchRequest($request);
-    }
-    catch (ResourceNotFoundException $e) {
-      throw new MatchingRouteNotFoundException(sprintf('No matching route could be found for the request: %s', $request), 0, $e);
-    }
+    // We use the router without access checks because URL objects might be
+    // created and stored for different users.
+    $result = \Drupal::service('router.no_access_checks')->matchRequest($request);
     $route_name = $result[RouteObjectInterface::ROUTE_NAME];
     $route_parameters = $result['_raw_variables']->all();
     return new static($route_name, $route_parameters);

core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php

@@ -7,15 +7,10 @@
 
 namespace Drupal\link\Plugin\Field\FieldWidget;
 
-use Drupal\Component\Utility\UrlHelper;
 use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Field\WidgetBase;
 use Drupal\Core\Form\FormStateInterface;
-use Drupal\Core\ParamConverter\ParamNotConvertedException;
-use Drupal\Core\Routing\MatchingRouteNotFoundException;
-use Drupal\Core\Url;
 use Drupal\link\LinkItemInterface;
-use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
  * Plugin implementation of the 'link' widget.
@@ -47,9 +42,10 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
 
     $default_url_value = NULL;
     if (isset($items[$delta]->url)) {
-      $url = Url::createFromPath($items[$delta]->url);
-      $url->setOptions($items[$delta]->options);
-      $default_url_value = ltrim($url->toString(), '/');
+      if ($url = \Drupal::pathValidator()->getUrlIfValid($items[$delta]->url)) {
+        $url->setOptions($items[$delta]->options);
+        $default_url_value = ltrim($url->toString(), '/');
+      }
     }
     $element['url'] = array(
       '#type' => 'url',
@@ -204,32 +200,16 @@ public function validateTitle(&$element, FormStateInterface $form_state, $form)
   public function massageFormValues(array $values, array $form, FormStateInterface $form_state) {
     foreach ($values as &$value) {
       if (!empty($value['url'])) {
-        try {
-          $parsed_url = UrlHelper::parse($value['url']);
-
-          // If internal links are supported, look up whether the given value is
-          // a path alias and store the system path instead.
-          if ($this->supportsInternalLinks() && !UrlHelper::isExternal($value['url'])) {
-            $parsed_url['path'] = \Drupal::service('path.alias_manager')->getPathByAlias($parsed_url['path']);
-          }
-
-          $url = Url::createFromPath($parsed_url['path']);
-          $url->setOption('query', $parsed_url['query']);
-          $url->setOption('fragment', $parsed_url['fragment']);
-          $url->setOption('attributes', $value['attributes']);
-
-          $value += $url->toArray();
-          // Reset the URL value to contain only the path.
-          $value['url'] = $parsed_url['path'];
-        }
-        catch (NotFoundHttpException $e) {
-          // Nothing to do here, LinkTypeConstraintValidator emits errors.
-        }
-        catch (MatchingRouteNotFoundException $e) {
-          // Nothing to do here, LinkTypeConstraintValidator emits errors.
+        $url = \Drupal::pathValidator()->getUrlIfValid($value['url']);
+        if (!$url) {
+          return $values;
         }
-        catch (ParamNotConvertedException $e) {
-          // Nothing to do here, LinkTypeConstraintValidator emits errors.
+
+        $value += $url->toArray();
+
+        // Reset the URL value to contain only the path.
+        if (!$url->isExternal() && $this->supportsInternalLinks()) {
+          $value['url'] = substr($url->toString(), strlen(\Drupal::request()->getBasePath() . '/'));
         }
       }
     }

core/modules/link/src/Plugin/Validation/Constraint/LinkTypeConstraint.php

@@ -8,14 +8,9 @@
 namespace Drupal\link\Plugin\Validation\Constraint;
 
 use Drupal\link\LinkItemInterface;
-use Drupal\Core\Url;
-use Drupal\Core\Routing\MatchingRouteNotFoundException;
-use Drupal\Core\ParamConverter\ParamNotConvertedException;
-use Drupal\Component\Utility\UrlHelper;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidatorInterface;
 use Symfony\Component\Validator\ExecutionContextInterface;
-use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
  * Validation constraint for links receiving data allowed by its settings.
@@ -53,36 +48,20 @@ public function validatedBy() {
    */
   public function validate($value, Constraint $constraint) {
     if (isset($value)) {
-      $url_is_valid = TRUE;
+      $url_is_valid = FALSE;
       /** @var $link_item \Drupal\link\LinkItemInterface */
       $link_item = $value;
       $link_type = $link_item->getFieldDefinition()->getSetting('link_type');
       $url_string = $link_item->url;
       // Validate the url property.
       if ($url_string !== '') {
-        try {
-          // @todo This shouldn't be needed, but massageFormValues() may not
-          //   run.
-          $parsed_url = UrlHelper::parse($url_string);
+        if ($url = \Drupal::pathValidator()->getUrlIfValid($url_string)) {
+          $url_is_valid = (bool) $url;
 
-          $url = Url::createFromPath($parsed_url['path']);
-
-          if ($url->isExternal() && !UrlHelper::isValid($url_string, TRUE)) {
-            $url_is_valid = FALSE;
-          }
-          elseif ($url->isExternal() && !($link_type & LinkItemInterface::LINK_EXTERNAL)) {
+          if ($url->isExternal() && !($link_type & LinkItemInterface::LINK_EXTERNAL)) {
             $url_is_valid = FALSE;
           }
         }
-        catch (NotFoundHttpException $e) {
-          $url_is_valid = FALSE;
-        }
-        catch (MatchingRouteNotFoundException $e) {
-          $url_is_valid = FALSE;
-        }
-        catch (ParamNotConvertedException $e) {
-          $url_is_valid = FALSE;
-        }
       }
       if (!$url_is_valid) {
         $this->context->addViolation($this->message, array('%url' => $url_string));

core/modules/link/src/Tests/LinkFieldTest.php

@@ -52,6 +52,7 @@ protected function setUp() {
     $this->web_user = $this->drupalCreateUser(array(
       'view test entity',
       'administer entity_test content',
+      'link to any page',
     ));
     $this->drupalLogin($this->web_user);
   }

core/modules/menu_link_content/src/Form/MenuLinkContentForm.php

@@ -18,11 +18,9 @@
 use Drupal\Core\Menu\Form\MenuLinkFormInterface;
 use Drupal\Core\Menu\MenuLinkInterface;
 use Drupal\Core\Menu\MenuParentFormSelectorInterface;
-use Drupal\Core\ParamConverter\ParamNotConvertedException;
 use Drupal\Core\Path\AliasManagerInterface;
-use Drupal\Core\Routing\MatchingRouteNotFoundException;
+use Drupal\Core\Path\PathValidatorInterface;
 use Drupal\Core\Session\AccountInterface;
-use Drupal\Core\Url;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\Routing\RequestContext;
 
@@ -77,6 +75,13 @@ class MenuLinkContentForm extends ContentEntityForm implements MenuLinkFormInter
    */
   protected $account;
 
+  /**
+   * The path validator.
+   *
+   * @var \Drupal\Core\Path\PathValidatorInterface
+   */
+  protected $pathValidator;
+
   /**
    * Constructs a MenuLinkContentForm object.
    *
@@ -96,8 +101,10 @@ class MenuLinkContentForm extends ContentEntityForm implements MenuLinkFormInter
    *   The access manager.
    * @param \Drupal\Core\Session\AccountInterface $account
    *   The current user.
+   * @param \Drupal\Core\Path\PathValidatorInterface $path_validator
+   *   The path validator.
    */
-  public function __construct(EntityManagerInterface $entity_manager, MenuParentFormSelectorInterface $menu_parent_selector, AliasManagerInterface $alias_manager, ModuleHandlerInterface $module_handler, RequestContext $request_context, LanguageManagerInterface $language_manager, AccessManagerInterface $access_manager, AccountInterface $account) {
+  public function __construct(EntityManagerInterface $entity_manager, MenuParentFormSelectorInterface $menu_parent_selector, AliasManagerInterface $alias_manager, ModuleHandlerInterface $module_handler, RequestContext $request_context, LanguageManagerInterface $language_manager, AccessManagerInterface $access_manager, AccountInterface $account, PathValidatorInterface $path_validator) {
     parent::__construct($entity_manager, $language_manager);
     $this->menuParentSelector = $menu_parent_selector;
     $this->pathAliasManager = $alias_manager;
@@ -106,6 +113,7 @@ public function __construct(EntityManagerInterface $entity_manager, MenuParentFo
     $this->languageManager = $language_manager;
     $this->accessManager = $access_manager;
     $this->account = $account;
+    $this->pathValidator = $path_validator;
   }
 
   /**
@@ -120,7 +128,8 @@ public static function create(ContainerInterface $container) {
       $container->get('router.request_context'),
       $container->get('language_manager'),
       $container->get('access_manager'),
-      $container->get('current_user')
+      $container->get('current_user'),
+      $container->get('path.validator')
     );
   }
 
@@ -167,46 +176,6 @@ public function submitConfigurationForm(array &$form, FormStateInterface $form_s
     $this->save($form, $form_state);
   }
 
-  /**
-   * Breaks up a user-entered URL or path into all the relevant parts.
-   *
-   * @param string $url
-   *   The user-entered URL or path.
-   *
-   * @return array
-   *   The extracted parts.
-   */
-  protected function extractUrl($url) {
-    $extracted = UrlHelper::parse($url);
-    $external = UrlHelper::isExternal($url);
-    if ($external) {
-      $extracted['url'] = $extracted['path'];
-      $extracted['route_name'] = NULL;
-      $extracted['route_parameters'] = array();
-    }
-    else {
-      $extracted['url'] = '';
-      // If the path doesn't match a Drupal path, the route should end up empty.
-      $extracted['route_name'] = NULL;
-      $extracted['route_parameters'] = array();
-      try {
-        // Find the route_name.
-        $normal_path = $this->pathAliasManager->getPathByAlias($extracted['path']);
-        $url_obj = Url::createFromPath($normal_path);
-        $extracted['route_name'] = $url_obj->getRouteName();
-        $extracted['route_parameters'] = $url_obj->getRouteParameters();
-      }
-      catch (MatchingRouteNotFoundException $e) {
-        // The path doesn't match a Drupal path.
-      }
-      catch (ParamNotConvertedException $e) {
-        // A path like node/99 matched a route, but the route parameter was
-        // invalid (e.g. node with ID 99 does not exist).
-      }
-    }
-    return $extracted;
-  }
-
   /**
    * {@inheritdoc}
    */
@@ -220,17 +189,24 @@ public function extractFormValues(array &$form, FormStateInterface $form_state)
     }
     $new_definition['parent'] = isset($parent) ? $parent : '';
 
-    $extracted = $this->extractUrl($form_state->getValue('url'));
-    $new_definition['url'] = $extracted['url'];
-    $new_definition['route_name'] = $extracted['route_name'];
-    $new_definition['route_parameters'] = $extracted['route_parameters'];
-    $new_definition['options'] = array();
-    if ($extracted['query']) {
-      $new_definition['options']['query'] = $extracted['query'];
-    }
-    if ($extracted['fragment']) {
-      $new_definition['options']['fragment'] = $extracted['fragment'];
+    $new_definition['url'] = NULL;
+    $new_definition['route_name'] = NULL;
+    $new_definition['route_parameters'] = [];
+    $new_definition['options'] = [];
+
+    $extracted = $this->pathValidator->getUrlIfValid($form_state->getValue('url'));
+
+    if ($extracted) {
+      if ($extracted->isExternal()) {