[Zope-CMF] Zope cache problems

[Andy Bramah]

I've got this at the top of the css content

<dtml-let last_modified="_.DateTime()-14"
expires="_.DateTime()+7" >
<dtml-call "REQUEST.RESPONSE.setHeader( 'Content-Type', 'text/css' )">
<dtml-call "REQUEST.RESPONSE.setHeader( 'Last-Modified',
last_modified.toZone('GMT').rfc822() )">
<dtml-call "REQUEST.RESPONSE.setHeader( 'Cache-Control', 'max-age=36000,
must-revalidate' )">
<dtml-call "REQUEST.RESPONSE.setHeader( 'Expires',
expires.toZone('GMT').rfc822() )" >
</dtml-let>

This is what Plone has out of the box. Tried removing the Cache-Control
line - didn't work, and the tool you recommend reports the same error (the
object is returned when only validation is requested).

I'm using Zope 2.5.1, CMF1.3b2, Plone1.0a. Maybe I'm being dumn and should
try updating to something later - only I've looked on CVS and it uses the
same header I've pasted above.

Also, which lists should I be replying to? I don't want to annoy anyone with
my continuing cache problems...!

Andy.



-----Original Message-----
From: zope-cmf-admin@zope.org [mailto:zope-cmf-admin@zope.org]On Behalf
Of Geoff Davis
Sent: 19 August 2002 08:31
To: Andy Bramah; Plone Developers; Zope CMF
Subject: Re: [Zope-CMF] Zope cache problems


Hmm.  One potential issue is that the max-age tag is an HTTP 1.1 tag.  Try
using an  Expires header (an HTTP 1.0 tag) instead.  You need to specify an
HTTP date in GMT, e.g.

Expires: Sun, 25 Aug 2002 18:00:00 GMT

See http://www.web-caching.com/mnot_tutorial/how.html#EXPIRES

Geoff



Geoff Davis
http://www.geoffdavis.net


----- Original Message -----
From: "Andy Bramah" <andybramah@cantab.net>
To: "Geoff Davis" <geoff@geoffdavis.net>; "Plone Developers"
<plone-developers@lists.sourceforge.net>; "Zope CMF" <zope-cmf@zope.org>
Sent: Sunday, August 18, 2002 7:26 AM
Subject: RE: [Zope-CMF] Zope cache problems


> Hello,
>
> I've tried changing and removing the must-revalidate, and it doesn't seem
to
> make any difference. What should I be doing?
>
> The caching problems seem to be really slowing my Plone site down. When I
> request a Plone page from localhost, it loads almost instantaneously. But
> when I try and access the site from elsewhere, the page takes ages to
> appear. I use IE, and the blue progress bar moves quickly all the way over
> to the right, then sits and does nothing for ages. The page then appears
all
> at once.
>
> I notice this happens on www.plone.org as well.
>
> Pages download almost instantly if I use the No CSS skin.
>
> Any ideas?
>
> Andy.
>



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