/**
* Process the _tags request attribute, which is set when using the Tag
* annotation
*
* - For a safe (GET or HEAD) request, the tags are set on the response.
* - For a non-safe request, the tags will be invalidated.
*
* @param FilterResponseEvent $event
*/
public function onKernelResponse(FilterResponseEvent $event)
{
$request = $event->getRequest();
$response = $event->getResponse();
$tags = array();
// Only set cache tags or invalidate them if response is successful
if ($response->isSuccessful()) {
$tags = $this->getAnnotationTags($request);
}
$configuredTags = $this->matchRule($request, $response);
if ($configuredTags) {
foreach ($configuredTags['tags'] as $tag) {
$tags[] = $tag;
}
foreach ($configuredTags['expressions'] as $expression) {
$tags[] = $this->evaluateTag($expression, $request);
}
}
if (!count($tags)) {
return;
}
if ($request->isMethodSafe()) {
// For safe requests (GET and HEAD), set cache tags on response
$this->cacheManager->tagResponse($response, $tags);
} else {
// For non-safe methods, invalidate the tags
$this->cacheManager->invalidateTags($tags);
}
}
public function testTagResponse()
{
$ban = \Mockery::mock('\FOS\HttpCache\ProxyClient\Invalidation\BanInterface');
$router = \Mockery::mock('\Symfony\Component\Routing\Generator\UrlGeneratorInterface');
$tags1 = array('post-1', 'posts');
$tags2 = array('post-2');
$tags3 = array('different');
$cacheManager = new CacheManager($ban, $router);
$response = new Response();
$response->headers->set($cacheManager->getTagsHeader(), '');
$cacheManager->tagResponse($response, $tags1);
$this->assertTrue($response->headers->has($cacheManager->getTagsHeader()));
$this->assertEquals(implode(',', $tags1), $response->headers->get($cacheManager->getTagsHeader()));
$cacheManager->tagResponse($response, $tags2);
$this->assertEquals(implode(',', array_merge($tags1, $tags2)), $response->headers->get($cacheManager->getTagsHeader()));
$cacheManager->tagResponse($response, $tags3, true);
$this->assertEquals(implode(',', $tags3), $response->headers->get($cacheManager->getTagsHeader()));
}