vendor/symfony/form/Extension/Csrf/Type/FormTypeCsrfExtension.php line 78

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  1. <?php
  3. /*
  4.  * This file is part of the Symfony package.
  5.  *
  6.  * (c) Fabien Potencier <[email protected]>
  7.  *
  8.  * For the full copyright and license information, please view the LICENSE
  9.  * file that was distributed with this source code.
  10.  */
  12. namespace Symfony\Component\Form\Extension\Csrf\Type;
  14. use Symfony\Component\Form\AbstractTypeExtension;
  15. use Symfony\Component\Form\Extension\Core\Type\FormType;
  16. use Symfony\Component\Form\Extension\Core\Type\HiddenType;
  17. use Symfony\Component\Form\Extension\Csrf\EventListener\CsrfValidationListener;
  18. use Symfony\Component\Form\FormBuilderInterface;
  19. use Symfony\Component\Form\FormInterface;
  20. use Symfony\Component\Form\FormView;
  21. use Symfony\Component\Form\Util\ServerParams;
  22. use Symfony\Component\OptionsResolver\OptionsResolver;
  23. use Symfony\Component\Security\Csrf\CsrfTokenManagerInterface;
  24. use Symfony\Contracts\Translation\TranslatorInterface;
  26. /**
  27.  * @author Bernhard Schussek <[email protected]>
  28.  */
  29. class FormTypeCsrfExtension extends AbstractTypeExtension
  30. {
  31.     private $defaultTokenManager;
  32.     private $defaultEnabled;
  33.     private $defaultFieldName;
  34.     private $translator;
  35.     private $translationDomain;
  36.     private $serverParams;
  38.     public function __construct(CsrfTokenManagerInterface $defaultTokenManager, bool $defaultEnabled = true, string $defaultFieldName = '_token', ?TranslatorInterface $translator = null, ?string $translationDomain = null, ?ServerParams $serverParams = null)
  39.     {
  40.         $this->defaultTokenManager = $defaultTokenManager;
  41.         $this->defaultEnabled = $defaultEnabled;
  42.         $this->defaultFieldName = $defaultFieldName;
  43.         $this->translator = $translator;
  44.         $this->translationDomain = $translationDomain;
  45.         $this->serverParams = $serverParams;
  46.     }
  48.     /**
  49.      * Adds a CSRF field to the form when the CSRF protection is enabled.
  50.      */
  51.     public function buildForm(FormBuilderInterface $builder, array $options)
  52.     {
  53.         if (!$options['csrf_protection']) {
  54.             return;
  55.         }
  57.         $builder
  58.             ->addEventSubscriber(new CsrfValidationListener(
  59.                 $options['csrf_field_name'],
  60.                 $options['csrf_token_manager'],
  61.                 $options['csrf_token_id'] ?: ($builder->getName() ?: \get_class($builder->getType()->getInnerType())),
  62.                 $options['csrf_message'],
  63.                 $this->translator,
  64.                 $this->translationDomain,
  65.                 $this->serverParams
  66.             ))
  67.         ;
  68.     }
  70.     /**
  71.      * Adds a CSRF field to the root form view.
  72.      */
  73.     public function finishView(FormView $view, FormInterface $form, array $options)
  74.     {
  75.         if ($options['csrf_protection'] && !$view->parent && $options['compound']) {
  76.             $factory = $form->getConfig()->getFormFactory();
  77.             $tokenId = $options['csrf_token_id'] ?: ($form->getName() ?: \get_class($form->getConfig()->getType()->getInnerType()));
  78.             $data = (string) $options['csrf_token_manager']->getToken($tokenId);
  80.             $csrfForm = $factory->createNamed($options['csrf_field_name'], HiddenType::class, $data, [
  81.                 'block_prefix' => 'csrf_token',
  82.                 'mapped' => false,
  83.             ]);
  85.             $view->children[$options['csrf_field_name']] = $csrfForm->createView($view);
  86.         }
  87.     }
  89.     /**
  90.      * {@inheritdoc}
  91.      */
  92.     public function configureOptions(OptionsResolver $resolver)
  93.     {
  94.         $resolver->setDefaults([
  95.             'csrf_protection' => $this->defaultEnabled,
  96.             'csrf_field_name' => $this->defaultFieldName,
  97.             'csrf_message' => 'The CSRF token is invalid. Please try to resubmit the form.',
  98.             'csrf_token_manager' => $this->defaultTokenManager,
  99.             'csrf_token_id' => null,
  100.         ]);
  101.     }
  103.     /**
  104.      * {@inheritdoc}
  105.      */
  106.     public static function getExtendedTypes(): iterable
  107.     {
  108.         return [FormType::class];
  109.     }
  110. }