我正在尝试做一件困难的事情：使用 FOSHttpCacheBundle 2.9.0 和内置的 Symfony 反向代理，使用 Symfony 4.4.13 实现缓存失效。不幸的是，我不能使用其他缓存解决方案（如 Varnish 或 Nginx），因为我的托管服务不提供它们。所以，Symfony 内置的反向代理是我唯一的解决方案。
我已经安装并配置了 FOSHttpCacheBundle（按照文档）。还创建了一个 CacheKernel 类并修改了 Kernel 以使用它（遵循Symfony 官方文档、FOSHttpCache 文档和FOSHttpCacheBundle 文档）。
经过几次测试（使用我的浏览器），HTTP 缓存工作并且 GET 响应被缓存（在浏览器网络分析器中看到）。但是，当我使用 PUT/PATCH/POST 更新资源时，GET 响应仍然来自缓存，并且在到期之前保持不变。我的推论是无效化不起作用。
我做错了吗？你能帮我解决问题吗？请参阅下面的代码和配置。
配置/包/fos_http_cache.yaml
fos_http_cache:
cache_control:
rules:
-
match:
path: ^/
headers:
cache_control:
public: true
max_age: 15
s_maxage: 30
etag: "strong"
cache_manager:
enabled: true
invalidation:
enabled: true
proxy_client:
symfony:
tags_header: My-Cache-Tags
tags_method: TAGPURGE
header_length: 1234
purge_method: PURGE
use_kernel_dispatcher: true
src/CacheKernel.php
<?php
namespace App;
use FOS\HttpCache\SymfonyCache\CacheInvalidation;
use FOS\HttpCache\SymfonyCache\CustomTtlListener;
use FOS\HttpCache\SymfonyCache\DebugListener;
use FOS\HttpCache\SymfonyCache\EventDispatchingHttpCache;
use FOS\HttpCache\SymfonyCache\PurgeListener;
use FOS\HttpCache\SymfonyCache\RefreshListener;
use FOS\HttpCache\SymfonyCache\UserContextListener;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\HttpCache\HttpCache;
use Symfony\Component\HttpKernel\HttpCache\Store;
use Symfony\Component\HttpKernel\HttpKernelInterface;
class CacheKernel extends HttpCache implements CacheInvalidation
{
use EventDispatchingHttpCache;
// Overwrite constructor to register event listeners for FOSHttpCache.
public function __construct(HttpKernelInterface $kernel, SurrogateInterface $surrogate = null, array $options = [])
{
parent::__construct($kernel, new Store($kernel->getCacheDir()), $surrogate, $options);
$this->addSubscriber(new CustomTtlListener());
$this->addSubscriber(new PurgeListener());
$this->addSubscriber(new RefreshListener());
$this->addSubscriber(new UserContextListener());
if (isset($options['debug']) && $options['debug'])
$this->addSubscriber(new DebugListener());
}
// Made public to allow event listeners to do refresh operations.
public function fetch(Request $request, $catch = false)
{
return parent::fetch($request, $catch);
}
}
src/内核.php
<?php
namespace App;
use FOS\HttpCache\SymfonyCache\HttpCacheAware;
use FOS\HttpCache\SymfonyCache\HttpCacheProvider;
use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel as BaseKernel;
use Symfony\Component\Routing\RouteCollectionBuilder;
class Kernel extends BaseKernel implements HttpCacheProvider
{
use MicroKernelTrait;
use HttpCacheAware;
private const CONFIG_EXTS = '.{php,xml,yaml,yml}';
public function __construct(string $environment, bool $debug)
{
parent::__construct($environment, $debug);
$this->setHttpCache(new CacheKernel($this));
}
...
公共/index.php
<?php
use App\Kernel;
use Symfony\Component\ErrorHandler\Debug;
use Symfony\Component\HttpFoundation\Request;
require dirname(__DIR__).'/config/bootstrap.php';
...
$kernel = new Kernel($_SERVER['APP_ENV'], (bool) $_SERVER['APP_DEBUG']);
$kernel = $kernel->getHttpCache();
$request = Request::createFromGlobals();
$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);
我的控制器之一，src/Controller/SectionController.php（注意：路由在 YAML 文件中定义）
<?php
namespace App\Controller;
use App\Entity\Section;
use App\Entity\SectionCollection;
use App\Form\SectionType;
use FOS\HttpCacheBundle\Configuration\InvalidateRoute;
use FOS\RestBundle\Controller\AbstractFOSRestController;
use FOS\RestBundle\Controller\Annotations as Rest;
use FOS\RestBundle\View\View;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\HttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
class SectionController extends AbstractFOSRestController
{
/**
* List all sections.
*
* @Rest\View
* @param Request $request the request object
* @return array
*
* Route: get_sections
*/
public function getSectionsAction(Request $request)
{
return new SectionCollection($this->getDoctrine()->getRepository(Section::class)->findAll());
}
/**
* Get a single section.
*
* @Rest\View
* @param Request $request the request object
* @param int $id the section id
* @return array
* @throws NotFoundHttpException when section not exist
*
* Route: get_section
*/
public function getSectionAction(Request $request, $id)
{
if (!$section = $this->getDoctrine()->getRepository(Section::class)->find($id))
throw $this->createNotFoundException('Section does not exist.');
return array('section' => $section);
}
/**
* Get friends of the section's user.
*
* @Rest\View
* @return array
*
* Route: get_friendlysections
*/
public function getFriendlysectionsAction()
{
return $this->get('security.token_storage')->getToken()->getUser()->getSection()->getMyFriends();
}
private function processForm(Request $request, Section $section)
{
$em = $this->getDoctrine()->getManager();
$statusCode = $em->contains($section) ? Response::HTTP_NO_CONTENT : Response::HTTP_CREATED;
$form = $this->createForm(SectionType::class, $section, array('method' => $request->getMethod()));
// If PATCH method, don't clear missing data.
$form->submit($request->request->get($form->getName()), $request->getMethod() === 'PATCH' ? false : true);
if ($form->isSubmitted() && $form->isValid()) {
$em->persist($section);
$em->flush();
$response = new Response();
$response->setStatusCode($statusCode);
// set the 'Location' header only when creating new resources
if ($statusCode === Response::HTTP_CREATED) {
$response->headers->set('Location',
$this->generateUrl(
'get_section', array('id' => $section->getId()),
true // absolute
)
);
}
return $response;
}
return View::create($form, Response::HTTP_BAD_REQUEST);
}
/**
*
* Creates a new section from the submitted data.
*
* @Rest\View
* @return FormTypeInterface[]
*
* @InvalidateRoute("get_friendlysections")
* @InvalidateRoute("get_sections")
*
* Route: post_section
*/
public function postSectionsAction(Request $request)
{
return $this->processForm($request, new Section());
}
/**
* Update existing section from the submitted data.
*
* @Rest\View
* @param int $id the section id
* @return FormTypeInterface[]
* @throws NotFoundHttpException when section not exist
*
* @InvalidateRoute("get_friendlysections")
* @InvalidateRoute("get_sections")
* @InvalidateRoute("get_section", params={"id" = {"expression"="id"}})")
*
* Route: put_section
*/
public function putSectionsAction(Request $request, $id)
{
if (!$section = $this->getDoctrine()->getRepository(Section::class)->find($id))
throw $this->createNotFoundException('Section does not exist.');
return $this->processForm($request, $section);
}
/**
* Partially update existing section from the submitted data.
*
* @Rest\View
* @param int $id the section id
* @return FormTypeInterface[]
* @throws NotFoundHttpException when section not exist
*
* @InvalidateRoute("get_friendlysections")
* @InvalidateRoute("get_sections")
* @InvalidateRoute("get_section", params={"id" = {"expression"="id"}})")
*
* Route: patch_section
*/
public function patchSectionsAction(Request $request, $id)
{
return $this->putSectionsAction($request, $id);
}
/**
* Remove a section.
*
* @Rest\View(statusCode=204)
* @param int $id the section id
* @return View
*
* @InvalidateRoute("get_friendlysections")
* @InvalidateRoute("get_sections")
* @InvalidateRoute("get_section", params={"id" = {"expression"="id"}})")
*
* Route: delete_section
*/
public function deleteSectionsAction($id)
{
$em = $this->getDoctrine()->getManager();
if ($section = $this->getDoctrine()->getRepository(Section::class)->find($id)) {
$em->remove($section);
$em->flush();
}
}
}