My app has an email newsletter and i'd like to implement an "Unsubscribe" option on the HTML email itself. This link would bring them to an isolated page that simply lets them know they've been unsubscribed, i'll grab their user info from URL parameters. There should be no way to access this page from within the app.
I was able to create an html file that's a sibling in the war folder to my host page and access it. How, in my app, do i detect that a user has accessed this page and then handle it? I don't need code to be shown to me, i just need a point in the right direction.