/**
* Adds the needed headers and prepares the content
*
* @param \Zepi\Turbo\Response\Response $response
* @param string $type
* @param string $hash
* @param string $version
* @param string $content
*/
protected function deliverContent(Response $response, $type, $hash, $version, $content)
{
// Define the if modified since timestamp
$cachedAssetTimestamp = $this->assetCacheManager->getCachedAssetTimestamp($type, $hash, $version);
$ifModifiedSince = -1;
if ($this->isHeaderSetAndNotEmpty('HTTP_IF_MODIFIED_SINCE')) {
$ifModifiedSince = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
}
// Define the etag
$eTag = md5($content);
$eTagHeader = -1;
if ($this->isHeaderSetAndNotEmpty('HTTP_IF_NONE_MATCH')) {
$eTagHeader = $_SERVER['HTTP_IF_NONE_MATCH'];
}
// Set the cache headers
$cacheTtl = 86400 * 365;
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $cachedAssetTimestamp) . ' GMT');
header('Expires: ' . gmdate("D, d M Y H:i:s", time() + $cacheTtl) . ' GMT');
header('Pragma: cache');
header('Etag: ' . $eTag);
header('Cache-Control: max-age=' . $cacheTtl);
// Verify the cached timestamp and the eTag
if ($cachedAssetTimestamp === $ifModifiedSince || $eTag === $eTagHeader) {
header('HTTP/1.1 304 Not Modified');
exit;
}
// Set the content type
$contentType = $this->getContentType($type, $version);
if ($contentType !== '') {
header('Content-type: ' . $contentType, true);
}
// Display the content
$response->setOutput($content);
}
