/**
* Checks if we need to remove Cache-Control for SSL encrypted downloads when using IE < 9.
*
* @link http://support.microsoft.com/kb/323308
*/
protected function ensureIEOverSSLCompatibility(Request $request)
{
$server_info = $request->getServer();
if (stripos($this->headers->get('Content-Disposition')->getValueString(), 'attachment') !== FALSE && preg_match('/MSIE (.*?);/i', $server_info['HTTP_USER_AGENT'], $match) == 1 && $request->isSecure() === TRUE) {
if (intval(preg_replace("/(MSIE )(.*?);/", "\$2", $match[0])) < 9) {
$this->headers->remove('Cache-Control');
}
}
}
