php - Symfony2 - 注销并清除缓存 + 防止后退按钮

Question

我尝试在用户注销时关闭浏览器缓存。我实现了 LogoutSuccessHandlerInterface 来扩展 onLogoutSuccess 方法。没有错误，但是当我注销时，我可以在浏览器中按后退按钮，我会看到我的个人资料页面 => 如果我刷新此页面，我会自动重定向，所以我正确注销了。

安全.yml

logout:
    path:   /logout
    target: /
    invalidate_session: true
    success_handler: project_user.handler.logout_handler

---

services.yml

project_user.handler.logout_handler:
    class:  Project\UserBundle\Handler\LogoutHandler

---

项目/UserBundle/Handler/LogoutHandler.php

<?php
namespace Project\UserBundle\Handler;

use Symfony\Component\Security\Http\Logout\LogoutSuccessHandlerInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RedirectResponse;

class LogoutHandler implements LogoutSuccessHandlerInterface
{
  public function onLogoutSuccess( Request $request )
  {
    $response =  new RedirectResponse( '/' );

    $response->headers->addCacheControlDirective( 'no-cache', true );
    $response->headers->addCacheControlDirective( 'max-age', 0 );
    $response->headers->addCacheControlDirective( 'must-revalidate', true );
    $response->headers->addCacheControlDirective( 'no-store', true );

    return $response;
  }
}

我尝试使用 this solution并且效果很好，但是每个请求都会调用此方法(每个页面多次)并导致速度变慢。请帮忙!

谢谢

Answer 1

试试这个，对我有用。

<?php 

namespace YourBundle;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;

class KernelSubscriber implements EventSubscriberInterface {

    public static function getSubscribedEvents() {
        return array(
            KernelEvents::RESPONSE => array(
                array('clearBrowserCache', 434255),
            ),
        );
    }

    public function clearBrowserCache(FilterResponseEvent $event) {
        $response = $event->getResponse();

        $response->headers->addCacheControlDirective('no-cache', true);
        $response->headers->addCacheControlDirective('max-age', 0);
        $response->headers->addCacheControlDirective('must-revalidate', true);
        $response->headers->addCacheControlDirective('no-store', true);        
    }

}

服务.yml

kernel_subscriber:
    class: YourBundle\KernelSubscriber
    tags:
        - { name: kernel.event_subscriber }