Mark, thanks for the tip - it sounded logical but unfortunately
doesn't seem to be the case. I didn't have any expire directives in
the conf file but I added this anyway:
ExpiresActive On
ExpiresDefault M86400
and it doesn't seem to be making any difference. I tried commenting
out the code for mod_headers and then the first Cache-Control line is
missing, but the one with max-age=0 is still there.
just for grins, I tried using telnet to request the URL instead of
going to it in the browser. I then found the corresponding header in
Apache's cache (this one is the actual HTML, the rest are all images),
so it's more of an apples-to-apples comparison. Both are below. The
interesting thing is that the cached header includes a lot more
information, including the erroneous "Cache-Control: max-age=0". Some
of it comes from mod_proxy, specifically the X-Forwarded part. But
there's nothing in the docs to suggest that mod_proxy does anything
with Cache-Control...
I've Googled quite a bit and have found other people with similar
issues but all the ones I found went unanswered. Seems I've found a
hard-to-solve problem. Lucky me. :)
janine
What Apache caches:
http://pug.furfly.com:8080/public/index?
MIME-Version: 1.0
Date: Mon, 13 Apr 2009 17:34:43 GMT
Server: AOLserver/4.0.10
Content-Type: text/html; charset=utf-8
Content-Length: 127358
Set-Cookie: ad_session_id=82810314%2c0%2c0+
%7b504+1239645283+E08EA2C07D8750971544D8B6671200EAF699C98D%7d; Path=/;
Max-Age=1200
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_6; en-us)
AppleWebKit/525.27.1 (KHTML, like Gecko) Version/3.2.1 Safari/525.27.1
Cache-Control: max-age=0
Accept: text/xml,application/xml,application/xhtml+xml,text/
html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en-us
Accept-Encoding: gzip, deflate
Cookie: __qca=482b4ca6-9b388-0907d-155ca;
__utma=146890400.1264817709.1186083344.1190161690.1203300241.4;
__utma
=69865361.4243060582732480000.1238996261.1239575290.1239642259.7;
__utmc=69865361; __utmz=69865361.1238996261.1.1.utmcsr=(direct)|
utmccn=(direct)|utmcmd=(none); ad_session_id=82810314%2c0%2c0+
%7b875+1239644942+FC98624F29A05DF429C7EEDE1E3233089A2BF039%7d;
JSESSIONID=1428D1022033F5CAB31B6FDA6F349021
Host: pug.furfly.com:8080
X-Forwarded-For: 173.50.249.21
X-Forwarded-Host: pug.furfly.com:8080
X-Forwarded-Server: pug.furfly.com
What telnet receives:
GET /public/index HTTP/1.0
HTTP/1.1 200 OK
Date: Mon, 13 Apr 2009 17:36:00 GMT
Server: Apache/2.2.11 (Unix)
Set-Cookie: ad_session_id=82810314%2c0%2c0+
%7b504+1239645283+E08EA2C07D875097154
4D8B6671200EAF699C98D%7d; Path=/; Max-Age=1200
MIME-Version: 1.0
Content-Length: 127358
Age: 77
Connection: close
Content-Type: text/html; charset=utf-8
On Apr 13, 2009, at 5:36 AM, Mark Aufflick wrote:
Hi Janine,
The key with Apache documentation is to know which module is going to
do what you want. Once you've figured that out, the docs are quite
clear (with the exception of mod_rewrite of course :)
In this case I happen to know that the Cache-control header is
generated by mod_expires, and you will find how to control it here:
http://httpd.apache.org/docs/2.0/mod/mod_expires.html
Your httpd config might have expiration set by default, or by file
extension.
Mark.
On Mon, Apr 13, 2009 at 9:32 AM, Janine Sisk <[email protected]>
wrote:
This is only peripherally related to AOLserver, but there are so many
helpful and knowledgeable people on this list, I'm hoping someone
will
recognize this.
I'm still working on that Apache/Tomcat caching thing I wrote about
a few
days ago. The client is insisting on Apache and nothing but
Apache, so I
haven't investigated Squid, Varnish or anything else so far.
I figured out how to use mod_cache to get Apache to cache the
content, but
it's kind of useless because there's a "Cache-Control: max-age=0"
header
that causes it to request a new copy every time. The problem is, I
can't
figure out where it's coming from.
I've eliminated Tomcat from the loop entirely, so the fault lies
somewhere
between AOLserver and Apache:
- telnet to AOLserver directly - no cache-control at all
GET /public/index HTTP/1.0
HTTP/1.0 200 OK
Set-Cookie:
ad_session_id=82810106%2c0%2c0+
%7b514+1239579021+56A366FC5E92AF28DB87E48214C6C4CE8C0581BB%7d;
Path=/; Max-Age=1200
MIME-Version: 1.0
Date: Sun, 12 Apr 2009 23:10:21 GMT
Server: AOLserver/4.0.10
Content-Type: text/html; charset=utf-8
Content-Length: 127358
Connection: close
- have Apache send request to AOLserver via mod_proxy
(ProxyPassMatch) - has
Cache-Control with max-age=0
Last-Modified: Mon, 30 Mar 2009 11:26:14 GMT
MIME-Version: 1.0
Date: Sun, 12 Apr 2009 23:03:02 GMT
Server: AOLserver/4.0.10
Content-Type: image/gif
Content-Length: 395
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_6; en-us)
AppleWebKit/525.27.1 (KHTML, like Gecko) Version/3.2.1 Safari/
525.27.1
Referer: http://pug.furfly.com:8080/public/index
Cache-Control: max-age=0
Accept: */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
- use mod_headers to add a Cache-Control header - now we have two:
Last-Modified: Mon, 30 Mar 2009 11:26:14 GMT
MIME-Version: 1.0
Date: Sun, 12 Apr 2009 23:15:04 GMT
Server: AOLserver/4.0.10
Content-Type: image/gif
Content-Length: 395
Cache-Control: max-age=999
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_6; en-us)
AppleWebKit/525.27.1 (KHTML, like Gecko) Version/3.2.1 Safari/
525.27.1
Referer: http://pug.furfly.com:8080/public/index
Cache-Control: max-age=0
Accept: */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
It appears that Apache is adding the rogue header, but I don't know
how to
tell it to stop!
Any suggestions?
janine
---
Janine Sisk
President/CEO of furfly, LLC
503-693-6407
--
AOLserver - http://www.aolserver.com/
To Remove yourself from this list, simply send an email to
<[email protected]> with the
body of "SIGNOFF AOLSERVER" in the email message. You can leave the
Subject:
field of your email blank.
--
Mark Aufflick
contact info at http://mark.aufflick.com/about/contact
--
AOLserver - http://www.aolserver.com/
To Remove yourself from this list, simply send an email to <[email protected]
> with the
body of "SIGNOFF AOLSERVER" in the email message. You can leave the
Subject: field of your email blank.
---
Janine Sisk
President/CEO of furfly, LLC
503-693-6407
--
AOLserver - http://www.aolserver.com/
To Remove yourself from this list, simply send an email to
<[email protected]> with the
body of "SIGNOFF AOLSERVER" in the email message. You can leave the Subject:
field of your email blank.
