Caching prob with AHCM and headers, was:[Zope] Caching prob with headers or reverse proxy?

[Janko Hauser]

On Fri, 25 Apr 2003 13:24:22 +0200
"Germer, Carsten" <carsten.germer@desy.de> wrote:

> Well I did some more research:
> AHCM does _not_ work out of the box, at least not with Apache as
> cache in front.
> Setting the headers via a dtml-method indeed does.
> With AHCM there are headers set but these don't trigger the caching,
> the headers I set with DTML do the trick. Maybe it's just a simple
> glitch in AHCM?
> 
The correspondig code in Zope2.6.1 in AHCM looks like this

      if not anon and self.anonymous_only:
          return
      # Set HTTP Expires and Cache-Control headers
      seconds=self.interval
      expires=rfc1123_date(time.time() + seconds)
      # RESPONSE.setHeader('Last-Modified',rfc1123_date(time.time()))
      RESPONSE.setHeader('Cache-Control', 'max-age=%d' % seconds)
      RESPONSE.setHeader('Expires', expires)

So specifically the last modified is commented out. I presume there
was a reason for this. I need to do some digging in the mailing
archives and the cvs logs first.

__Janko