peterrus peterrus - 6 months ago 142
Ajax Question

Symfony CSRF and Ajax

I am trying to implement some ajax functionality in my Symfony 2 project. Using jquery's $.post I want to send some data back to my controller. However, when I just POST the data no CSRF protection is in place, as symfony's csrf protection only seems to apply to forms.

What would be a pretty straightforward way to implement this?

When using forms I can just do $form->isValid() to find out whether or not the CSRF token passes. I am currently placing everything I want to POST in a form and then posting that. Which basically means I am only using that form to implement CSRF protection, which seems hacky.

Answer

In Symfony2 CSRF token is based on session by default. If you want to generate it, you just have to get this service and call generation method:

//Symfony\Component\Form\Extension\Csrf\CsrfProvider\SessionCsrfProvider by default
$csrf = $this->get('form.csrf_provider');
//Intention should be empty string, if you did not define it in parameters
$token = $csrf->generateCsrfToken($intention); 

return new Response($token);

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