Posted by John Bokma on 06/05/05 20:01

Jim J wrote:

> Once that code or password has been used to download that one file
> (and the same code/password can be used to access any one of the 100
> files), it is then expired/deleted/made invalid and can't be used
> again to download any other file.

How do you know the download went ok? I wouldn't waste to much effort in a
copy protection scheme (that is how it sounds)

What sounds better: give a code that makes it possible to download one file
during 24 hrs. So, as soon as you hand out the access code, you register it
in a database + current time. When a file link is clicked, you store the
name of the file unless the user/password combo has already something
assigned. If it's the same file, and within the 24hrs, allow it, otherwise
deny.

Every day you delete all entries that are older than 24 hrs.

You can use 2 stamps, one for moment of user/password creation, and one for
the first download attempt. You can do then something like: if combo older
than 3 days, delete it. If first download attempt was more then 8 hrs ago,
the combo no longer can be used.

--
John Small Perl scripts: http://johnbokma.com/perl/
Perl programmer available: http://castleamber.com/
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