Lance,

I was surprised that you reported that the Cache: max-age=0 forced a 
revalidation of the resource with the origin server. There is a BR in Bugzilla 
for this (actually there are several) for which I provided a patch against 
2.0.59:

http://issues.apache.org/bugzilla/show_bug.cgi?id=19441

>From memory there is at least one other RFC2616 compliance issue regarding the 
>no-cache request directive.

The bottom line is that if you want to use mod_cache with 2.0 you are on your 
own. If you can you should migrate to 2.2.4 or 2.2.8 whenever it is released. 
If have run mod_cache 2.2.4 against a test suite of my own, and it passed all 
the tests that failed with 2.0.

-ascs
 
-----Message d'origine-----
De : Campbell, Lance [mailto:[EMAIL PROTECTED] 
Envoyé : mardi 8 janvier 2008 19:32
À : users@httpd.apache.org
Cc : [EMAIL PROTECTED]
Objet : RE: [EMAIL PROTECTED] mod_disk_cache

Joshua,
I thought this was working but it is not.  This is my sinario:

1) I have a Java servlet that serves up some content.  I put a display in the 
code so I can confirm when it gets called.  I also put some code in the servlet 
to display header parameters that it receives.

2) I clear my disk cache for apache.

3) I restart apache.

4) I hit the servlet through a browser.  The log file shows that it was hit.  I 
also notice that there is files in the apache disk cache.

5) I then hit the servlet again through a browser.  Nothing comes through the 
log file.  So the servlet never received the request but the page came up.  So 
apache is caching the file.

6) I now trigger another servlet that sends the same URL that I put manually 
into the browser.  This request has the parameter
"Cache-Control: max-age=0" added to the header.  The servlet I have been 
talking to shows that it receives a request.  The header shows the following 
name value pairs:

header name=Cache-Control
header value=max-age=0
header name=pragma
header value=no-cache
header name=user-agent
header value=Java/1.6.0_02
header name=host
header value=qa.webtools.uiuc.edu
header name=accept
header value=text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2 header 
name=connection header value=keep-alive header name=content-length header 
value=0

When I go to the original servlet again I find the content is still the cached 
content.  It is as though the disk cache module let my request go on through 
but it did not delete/refresh the data.

What should I do?

Lance Campbell
Project Manager/Software Architect
Web Services at Public Affairs
University of Illinois
217.333.0382
http://webservices.uiuc.edu
 
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joshua Slive
Sent: Monday, January 07, 2008 11:27 AM
To: users@httpd.apache.org
Subject: Re: [EMAIL PROTECTED] mod_disk_cache

On Jan 7, 2008 12:12 PM, Campbell, Lance <[EMAIL PROTECTED]> wrote:
> Joshua,
> I don't understand what you are saying.  Is there some command
parameter
> you can send to htcacheclean or is there a special way of formatting
the
> requested cached URL that will cause it to be refreshed?

Just make an HTTP request to the server for the targeted URL with a
"Cache-Control: max-age=0" header.

Joshua.

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