Re: [Click-user] internet explorer expired page

[Bob Schellink <sa...@gmail.com>]

Hi Marcelo,

Please note that Click mailing lists have moved to Apache: 
http://click.sourceforge.net/docs/click-online.html#mailing-lists

The IE message is displayed when going back to a page where a form POST 
was performed. By displaying the message
the browser provides users the option to refresh, which would resubmit 
the form. This would be problematic if there was a
payment transaction as the user would end up paying twice.

A common pattern to work around this is the post-redirect pattern. After 
the form post, redirect back to the same
page. When going back in history IE will perform a GET request instead 
of a POST and won't display the refresh message.

See the method "onForm1Submit" at the bottom of the example:
http://www.avoka.com/click-examples/source-viewer.htm?filename=WEB-INF/classes/net/sf/click/examples/page/form/MultipleFormsDemo.java

You can also read the section "Preventing Accidental Form Posts" in the 
form Javadoc:
http://click.sourceforge.net/docs/click-api/net/sf/click/control/Form.html

kind regards

bob


Marcelo Grassi Franco Melgaço wrote:
> Hello, how are you?
> I have a page with a back button ( javascript history.back() )
> When the user with internet explorer browser clicks on that button, 
> internet explorer shows that the page was expired, try to refresh the 
> browser.
> Does anyone know how to force the i.e. to not show that message?
> I thinks is something with the expires/cache, meta info.
>
> Thanks !
>
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