public function createResponse(IAsset $asset, Request $request)
{
$response = new DispatchResponse();
//Set the correct content type based on the asset
$response->headers->set('Content-Type', $asset->getContentType());
$response->headers->set('X-Content-Type-Options', 'nosniff');
//Ensure the cache varies on the encoding
//Domain specific content will vary on the uri itself
$response->headers->set("Vary", "Accept-Encoding");
$content = $asset->getContent();
//Set the etag to the hash of the request uri, as it is in itself a hash
$response->setEtag(md5($content));
$response->setPublic();
//This resource should last for 30 days in cache
$response->setMaxAge(2592000);
$response->setSharedMaxAge(2592000);
$response->setExpires((new \DateTime())->add(new \DateInterval('P30D')));
//Set the last modified date to now
$date = new \DateTime();
$date->setTimezone(new \DateTimeZone('UTC'));
$response->headers->set('Last-Modified', $date->format('D, d M Y H:i:s') . ' GMT');
//Check to see if the client already has the content
if ($request->server->has('HTTP_IF_MODIFIED_SINCE')) {
$response->setNotModified();
} else {
$response->setContent($content);
}
return $response;
}
