/**
* {@inheritdoc}
*/
public function updateResponse(Response $response, StructureInterface $structure)
{
$response->headers->set(self::HEADER_HANDLERS, implode(', ', $this->handlerNames));
$response->headers->set(self::HEADER_CLIENT_NAME, $this->proxyClientName);
$response->headers->set(self::HEADER_STRUCTURE_TYPE, get_class($structure));
$response->headers->set(self::HEADER_STRUCTURE_UUID, $structure->getUuid());
// Structures implementing PageInterface have a TTL
if ($structure instanceof PageInterface) {
$cacheLifetimeData = $structure->getCacheLifeTime();
$cacheLifeTime = $this->cacheLifetimeResolver->resolve($cacheLifetimeData['type'], $cacheLifetimeData['value']);
$response->headers->set(self::HEADER_STRUCTURE_TTL, $cacheLifeTime);
}
}
/**
* {@inheritdoc}
*/
public function updateResponse(Response $response, StructureInterface $structure)
{
if (!$structure instanceof PageInterface) {
return;
}
$cacheLifetimeData = $structure->getCacheLifeTime();
$cacheLifetime = $this->cacheLifetimeResolver->resolve($cacheLifetimeData['type'], $cacheLifetimeData['value']);
// when structure cache-lifetime disabled - return
if (0 === $cacheLifetime) {
return;
}
// mark the response as either public or private
$response->setPublic();
// set the private and shared max age
$response->setMaxAge($this->maxAge);
$response->setSharedMaxAge($this->sharedMaxAge);
$proxyTtl = $this->usePageTtl ? $response->getAge() + $cacheLifetime : $response->getAge();
// set reverse-proxy TTL (Symfony HttpCache, Varnish, ...)
$response->headers->set(HttpCache::HEADER_REVERSE_PROXY_TTL, $proxyTtl);
}
/**
* Load cache lifetime metadata.
*
* @param $path
* @param \DOMXPath $xpath
*
* @return array
*/
private function loadCacheLifetime($path, \DOMXPath $xpath)
{
$nodeList = $xpath->query($path);
if (!$nodeList->length) {
return ['type' => CacheLifetimeResolverInterface::TYPE_SECONDS, 'value' => 0];
}
// get first node
$node = $nodeList->item(0);
$type = $node->getAttribute('type');
if ('' === $type) {
$type = CacheLifetimeResolverInterface::TYPE_SECONDS;
}
$value = $node->nodeValue;
if (!$this->cacheLifetimeResolver->supports($type, $value)) {
throw new \InvalidArgumentException(sprintf('CacheLifetime "%s" with type "%s" not supported.', $value, $type));
}
return ['type' => $type, 'value' => $value];
}
