Nginx with php configuration how to block all requests/urls other than two? (5 replies)

So i use nginx with PHP and i have the following two urls i want to allow access on the subdomain.

The full url would be sub1.domain.com/index.php?option=com_hwdmediashare&task=addmedia.upload&base64encryptedstring

if ( $args ~ 'option=com_hwdmediashare&task=addmedia.upload([a-zA-Z0-9-_=&])' ) {
}

And

sub1.domain.com/media/com_hwdmediashare/assets/swf/Swiff.Uploader.swf

But i cant figure out in nginx how to block all other traffic/requests on the subdomain apart from those two urls can anyone help me get a understanding of the location block of nginx so i can block access to all links apart from those two.