如何重定向在symfony中，如何在身份验证后重定向到身份验证之前的URL？

Question

I want a user to login (login page) and be redirected to the page on which they were before authentication.

For information, I created the login page using the make:auth -command and the redirection (in the code) is done in this code in the AppAuthenticator -class:

public function onAuthenticationSuccess(Request $request, TokenInterface $token, $providerKey)
{
    return new RedirectResponse($this->urlGenerator->generate('page_to_redirect'));
}

Answer 1

It looks like you are using a GuardAuthenticator. In that case you can use the TargetPathTrait to get the target path from the session.

use TargetPathTrait;

...

public function onAuthenticationSuccess(Request $request, TokenInterface $token, $providerKey)
{
    $targetPath = $this->getTargetPath($request->session, $providerKey);

    return new RedirectResponse($targetPath);
}

You might also want to provide a fallback, eg back to the homepage or read the info from another location, eg from an additional url query-parameter that you can set or you could also read it from the header, if you enable use_referer in your firewall .

Since the target path is not a route name, you don't need to use the UrlGenerator to retrieve the path for that route name.

Answer 2

And thank you for your answer. I tried your solution, but I got another problem. In fact I found the solution: When I enter the controller (before login), I store the route to redirect in the session:

>     /**
>      * @Route("/blog", name="blog")
>      */
>     public function blog(Request $request)
>     {
>         $request->getSession()->set("referer","blog");
>         return $this->render('main/blog.html.twig', [
>             'controller_name' => 'MainController',
>         ]);
>     }

And in the AppAuthenticator.php, I get the data using the referer :

 public function onAuthenticationSuccess(Request $request, TokenInterface $token, $providerKey) { $url = $request->getSession()->get('referer'); return new RedirectResponse($this->urlGenerator->generate($url)); }