protected function _deliverMedia(CakeResponse $response, $mediaFile, $mediaInfo)
{
$response->sharable(true, 2592000);
//$response->mustRevalidate(true);
$response->expires('+30 days');
$modTime = filemtime($mediaFile);
$response->modified($modTime);
$response->etag(md5($mediaFile . $modTime));
//$response->header("Pragma", "cache");
$response->type($mediaInfo['ext']);
$response->file($mediaFile);
$response->send();
}
