<cfheader> for preventing caching of pages

[thetawaverider]

What is the point of using <cfheader> to effectively force the browser
not to cache any pages so that they reload from the server? I've put the
following:

<cfheader name="Expires" value="#GetHttpTimeString(Now())#">
<cfheader name="Pragma" value="no-cache">

in my Application page for this wizard. Using the wizard Back button
even with these headers brings up the previous page with the field
values filled in just as they were when I moved to the next step. These
headers are supposed to expire a posted page when the Back button is
used, thereby causing the page to be reloaded from the server. This
information, therefore, should not be filled in.

Am I using these tags incorrectly?

BTW, this was tested in both IE6 and Firefox.

Thanks,
TWR

[gumshoe]

I could be wrong here, but I thought these tags would NOT work with the back
button, but only with actual requests to the server. The back button is at
the mercy of the user as they can opt to use a local cache.





"thetawaverider" <thetawaverider@gmail.com> wrote in message
news:d0fj4v$pi$2@forums.macromedia.com...

> What is the point of using <cfheader> to effectively force the browser not
> to cache any pages so that they reload from the server? I've put the
> following:
>
> <cfheader name="Expires" value="#GetHttpTimeString(Now())#">
> <cfheader name="Pragma" value="no-cache">
>
> in my Application page for this wizard. Using the wizard Back button even
> with these headers brings up the previous page with the field values
> filled in just as they were when I moved to the next step. These headers
> are supposed to expire a posted page when the Back button is used, thereby
> causing the page to be reloaded from the server. This information,
> therefore, should not be filled in.
>
> Am I using these tags incorrectly?
>
> BTW, this was tested in both IE6 and Firefox.
>
> Thanks,
> TWR

[paross1]

This seems to work for me....



<cfoutput>
<cfheader name="expires" value="#now()#">
<cfheader name="pragma" value="no-cache">
<cfheader name="cache-control" value="no-cache, no-store, must-revalidate">
</cfoutput>