I have a URL say for example
http://www.xyz.com/form1.html. Now i need to hide this URL since I dont want people to keep coming back to this URL and using it. What I mean is I need this URL to be usable only once per visit.
On this URL a form resides which sends out an email after submission to get an attachment. After a user is directed to this URL that is after his payment from paypal so I need that user to use that URL just once. Next time when next user comes he should see the same form but that URL should be masked or should expire in terms of validity sort of. The Main URL remains same but it should expire or get masked and if some copy pastes that masked URL it should work.
How can I make this happen?