[Zope] ZGDChart refresh

[Stefan H. Holek]

At 05.04.2002 16:11 +0200, Igor Leturia wrote:
>You're right, it's the browser cache! There was a gif file named
>'mychart?' ('mychart' is my chart's name) in the temporary internet
>files' folder, so I suppose the browser just shows that file again and
>again. If I delete this file and ask to show the page again, it
>generates the chart properly.
>
>So now we know what the problem is, but I need a solution! How can I
>tell my browser not to use this file? Or how can I delete this file from
>Zope?
>
>Thanks in advance,
>
>                         Igor Leturia

I tend to tackle these things by renaming the chart/image/movie/whatever 
everytime its content changes (i.e. it is reuploaded or something). 
Requires some logic in the display code but makes sure nothing is cached 
because the URL is different. Usually I create a kind of wrapper object 
that contains the actual resource and acts as a proxy to the outside world.

HTH,
Stefan


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