how to secure my CI app refusing GET method in controller

[eluser]drewbee[/eluser]
Wow Cool! I had no idea the server reported that!

Code:

// $ajax should hold a TRUE or FALSE depending on if it is an ajax request.
$ajax = !empty($this->input->server('HTTP_X_REQUESTED_WITH')) && $this->input->server('HTTP_X_REQUESTED_WITH') == 'XMLHttpRequest' ? TRUE : FALSE;