Help! How do I prevent redisplay of a web page?
Hello, I'm putting the finishing touches on a new members website and have encountered a conundrum... How to prevent the user (AFTER they have completed the payment screens and registration page) from returning back to those pages (using their back button) and registering again and again and again... I figured this would be an easy problem to solve by either expiring the pages just displayed or by blocking the back button with a Java script, but cannot find any information on how to do either. I KNOW i'm not the first person to ever encounter this problem and question. Does anyone here have any help to offer in how to keep the user from going back to an already completed registration screen?
HELP! I'm really stuck on this one!
Thanks...
TG Platt
Web Witchcraft Publishing
LancerForums posted this at 04:42 — 6th September 2001.
They have: 27 posts
Joined: Aug 2001
When a user registers do you store their info in a database? If so, you can check to make the same user is not already there.
Blocking the back button will kind of work, but technically a user could enter the old url themselves or even more forward to a page that allows the back button and right clicking to return to the registration portion.
Maybe you could set a cookie to know if a user has already been to that section. The problem with that is if a user disables them they won't work.
Mark
Webmaster
http://www.lancerforums.com
WebWitchcraft posted this at 14:26 — 6th September 2001.
They have: 2 posts
Joined: Sep 2001
If they redisplay the page, my security manager only checks for the same user name. If they use a different name, it would not detect that.
I actually think the proper solution is to just expire that page (as you often see happen with enrollment pages) and not allow the user to return to it. Then let the security manager do its 'normal' double-entry check if they happen to redisplay it anyway. But having the user press the back button and instantly redisplaying the enrollment page (as happens now) is just too easy and an open invitation to mischief, IMO. Does anyone have any suggestions for how to do that (expire the page, that is...)? I see this all the time, so I KNOW that's possible. Is there perhaps a way for the called PERL script (which is what receives the request and presents the page to begin with) to check and then refuse to load the page if the back-button was pressed?
Thanks again.
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