public function output($files, $cache_key)
{
header('Content-Type: ' . $this->contentType);
OC_Response::enableCaching();
$etag = $this->generateETag($files);
$cache_key .= '-' . $etag;
$gzout = false;
$cache = OC_Cache::getGlobalCache();
if (!OC_Request::isNoCache() && (!defined('DEBUG') || !DEBUG)) {
OC_Response::setETagHeader($etag);
$gzout = $cache->get($cache_key . '.gz');
}
if (!$gzout) {
$out = $this->minimizeFiles($files);
$gzout = gzencode($out);
$cache->set($cache_key . '.gz', $gzout);
OC_Response::setETagHeader($etag);
}
if ($encoding = OC_Request::acceptGZip()) {
header('Content-Encoding: ' . $encoding);
$out = $gzout;
} else {
$out = gzdecode($gzout);
}
header('Content-Length: ' . strlen($out));
echo $out;
}