Struts: Previous pages preserves old data

[PC Leung]

Hello

If a user fills in a form and presses a submit button,
the form is cleared. Record is inserted into database.

However if user clicks the "Back" button on the IE toolbar,
previous form data still there. If user now clicks
the submit button again, same record tries to insert into database.

Are there anything can be done to manipulate the "back" button
so that clicking it resulted in going back directly to main menu
or
other way to prevent same record from trying to insert into database?

Thanks
PC Leung

 

[Murray]

Hello

If a user fills in a form and presses a submit button,
the form is cleared. Record is inserted into database.

However if user clicks the "Back" button on the IE toolbar,
previous form data still there. If user now clicks
the submit button again, same record tries to insert into database.

Are there anything can be done to manipulate the "back" button
so that clicking it resulted in going back directly to main menu
or
other way to prevent same record from trying to insert into database?

Thanks
PC Leung

You can try all sorts of tricks to prevent users from going back, like
running the page in a popup and disabling navigation using javascript,
setting response headers to prevent caching etc ... none of them are
guaranteed to work unfortunately.

The safest way is to detect and handle duplicate requests. You can do that
in Struts using tokens. Check the docs, in particular the saveToken(),
isTokenValid() & resetToken() methods of the struts Action class

 

[PC Leung]

thanks

 

[James]

Don't allow caching