if ($start < 0 || $start > $end) {
$this->responseStatus = 416;
$this->responseHeaders['Content-Range'] = sprintf('bytes */%s', $this->fileSize);
if ($start < 0 || $start > $end) {
$this->responseStatus = 416;
$this->responseHeaders['Content-Range'] = sprintf('bytes */%s', $this->fileSize);