Re: RAM caching puzzles configuration interface

Micha <[email protected]> writes:

> I went through the configuration links to
> http://woody:8080/configuration/Purge/age
> 
> and inserted es.wikipedia.org after de.wikipedia.org.
> 
> Then i followed the bottom link back to the control page, from where
> i issued re-reading the config and then went again to 
> http://woody:8080/configuration/Purge/age
> to see what happened.
> 
> The browser (galeon 1.3.20) didn't show the new entry.
> After a simple reload, it did.

> Welli will assume it's rather generally a problem. And i can accpt
> to 'remember to reload' with webpages somehow. But i think it is not
> accpetable with the configurator (and also content management, but
> ok let's leave this out for the moment). No, i don't want to say
> it's your fault, Andrew. But to a user (who does not understand the
> implications), it is totally confusing, and must appear as just a
> bug. 

There is no way to force the browser to refetch the page, as WWWOFFLE
users that should be obvious since WWWOFFLE has so many features that
let you keep pages that servers may want you to forget.

There is an Expires header in HTTP/1.0 but that cannot force the
reloading of the page.

-------------------- HTTP/1.0 specification --------------------
   The Expires field cannot be used to force a user agent to refresh its
   display or reload a resource; its semantics apply only to caching
   mechanisms, and such mechanisms need only check a resource's
   expiration status when a new request for that resource is initiated.
-------------------- HTTP/1.0 specification --------------------

There are Cache-Control headers in HTTP/1.1 but again they cannot
force the browser to reload the page.  If you use the back button then
there is a good chance that there is no way to stop the page that you
see from being the out of date one.


I can add in an "Expires" and a "Cache-Control" header, but I cannot
guarantee that it will solve your problem.

-- 
Andrew.
----------------------------------------------------------------------
Andrew M. Bishop                             amb-Uxr6IM1mbv2TY6FTCsQk+9Bc4/[email protected]
                                      http://www.gedanken.demon.co.uk/

WWWOFFLE users page:
        http://www.gedanken.demon.co.uk/wwwoffle/version-2.8/user.html