Hiding a URL link? Or secure a download??

Is there a way I can hide the download link in my ASP page? WHat I mean is I sell a program and email when the order comes in. I want them to download it instantly after the purchase but do not want them to access the download link. Can I hide it? Or what do most other sites do to solve this problem?

Thanks!

I don't know how to do this in ASP but in Perl.

In Perl there's the possibility to get the URL of the site, where the user came from. When he use the URL in the addressbar of the browser, it'll return an empty variable.

So you could access a script, which redirects him to the file. So the address is invisible and when you verify the referer, you'll see if it's okay or not.

In perl this variable is $ENV{'HTTP_REFERER'}

Hope this helps.

Dennis.

in perl a sample would look like this...

#!/usr/local/bin/perl

if ($ENV{'HTTP_REFERER'} =~ "www.domain.com") {
print "Location: /uri to the files...\n\n";

}

else {
print "Content-Type: text/html\n\n";
print "Illegal function call...\n";

}