Accept request from my app only

[eluser]Colin Williams[/eluser]
You don't need CI's help (but it is there)

Plain PHP

Code:

$ip = $_SERVER['REMOTE_ADDR'];
$domain = $_SERVER['SERVER_NAME'];

With CI:

Code:

$ip = $this->input->server('REMOTE_ADDR');
$domain = $this->input->server('SERVER_NAME');

I'm not sure to what degree either of these can be spoofed, but you might want to research that.