Re: AW: AW: [squid-users] HttpRequestHeader "If-None-Match" problem with Squid

2005-05-27 Thread Henrik Nordstrom 

On Fri, 27 May 2005, Matthias Wessendorf wrote:


What does the cacheability check engine say about your
dynamic content?


do you mean the logfile ?


No, I mean the cacheability check engine.

http://www.mnot.net/cacheability/


I am setting the following:
Cache-Control: public, must-revalidate
ETag: a generated Value
Last-Modified: date

but I have no expires


must-revalidate probably makes Squid not cache these.

Is your Last-Modified a proper last modification date, or "now"?

Regards
Henrik

AW: AW: [squid-users] HttpRequestHeader "If-None-Match" problem with Squid

2005-05-27 Thread Matthias Wessendorf 
I added Expires and it works now as aspected

Thanks for your hints.

Matthias

> -Ursprüngliche Nachricht-
> Von: Henrik Nordstrom [mailto:[EMAIL PROTECTED]
> Gesendet: Freitag, 27. Mai 2005 13:51
> An: Matthias Wessendorf
> Cc: squid-users@squid-cache.org
> Betreff: Re: AW: [squid-users] HttpRequestHeader 
> "If-None-Match" problem
> with Squid
> 
> 
> 
> 
> On Fri, 27 May 2005, Matthias Wessendorf wrote:
> 
> > If-Modified-Since is also missing
> 
> Do your responses have a Last-Modified? If not there isn't 
> anything to 
> relate If-Modified-Since to..
> 
> > So I have now no idea, why the static content is cacheable, 
> but not my dynamic.
> 
> What does the cacheability check engine say about your 
> dynamic content?
> 
> > Is it not possible, to cache dynamic content ?
> 
> There is no difference in caching as such. Most dynamic 
> content however 
> does not have any information telling how long it may be 
> cached or when 
> the content was last modified so caches assume the content is 
> dynamically 
> generated for each request and should not be cached..
> 
> For something to be cached caches must have some reasonable means of 
> knowing the response may be reused for another request. The 
> Expires/Last-Modifed/Cache-Control max-age response headers 
> play a crucial 
> role in this. In addition your refresh_pattern rules is used when no 
> explicit expiry is known (Expires/max-age)
> 
> Regards
> Henrik
>