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Posted to users@httpd.apache.org by Brendon Anderson <br...@gmail.com> on 2011/10/05 15:16:07 UTC
[users@httpd] mod_cache is caching content with Cache-Control: private response headers
I am setting the Cache-Control: private header in a response on a
certain url, but mod_cache is still caching this url.
Response Headers as indicated by Firefox (Chrome reports similar results):
Response Headers
Date Wed, 05 Oct 2011 12:58:41 GMT
Server Apache/2.2.20 (Win32) mod_jk/1.2.32
Expires Wed, 05 Oct 2011 12:59:25 GMT
Cache-Control private
Content-Language en-US
Content-Length 7046
Age 15
Content-Type text/html;charset=UTF-8
X-Cache MISS from x.y.z.com
Via 1.0 x.y.z.com:80 (squid/2.6.STABLE22)
Proxy-Connection keep-alive
Logs indicating url is being cached (url set to private is /hrportal/home):
(accessing using Chrome)
[Wed Oct 05 07:58:25 2011] [debug] mod_cache.c(757): cache: Removing
CACHE_REMOVE_URL filter.
[Wed Oct 05 07:58:25 2011] [info] mem_cache: Cached url:
http://blahfoobar:8080/hrportal/home?
(accessing using Firefox)
[Wed Oct 05 07:58:41 2011] [debug] mod_cache.c(298): cache: running
CACHE_OUT filter
[Wed Oct 05 07:58:41 2011] [debug] mod_cache.c(312): cache: serving
/hrportal/home
Mod_cache config:
<IfModule mod_cache.c>
CacheIgnoreNoLastMod On
CacheIgnoreQueryString On
CacheIgnoreHeaders Set-Cookie
CacheIgnoreURLSessionIdentifiers jsessionid
CacheStorePrivate Off
<IfModule mod_mem_cache.c>
CacheEnable mem /
#100MB in KB
MCacheSize 102400
#MCacheMinObjectSize 1
#4MB in bytes
MCacheMaxObjectSize 4194304
</IfModule>
</IfModule>
What am I doing wrong? From my reading on mod_cache, it should NOT
cache if the Cache-Control header contains private.
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Re: [users@httpd] mod_cache is caching content with Cache-Control:
private response headers
Posted by Brendon Anderson <br...@gmail.com>.
I think I have this figured out, but am interested to know if this is
a bug or expected behavior.
So I had Spring add a Cache-Control: max-age=600 header in the
configuration. I was also adding a Cache-Control: private header in
the Java code in a specific place, more or less for testing. I could
see both headers come through on Firefox and Chrome, but mod_cache
refused to obey the private header and would cache that request. I
took out the automatic spring stuff and just added the private header
in my code. My gosh, it worked! Mod_cache would NOT cache that
specific request, exactly what I wanted.
My thought is that two Cache-Control headers were coming through and
mod_cache obeyed one or the other, not both (and it happened to not
obey the private one probably because of the order).
Does this sound feasible? Bug?
On Wed, Oct 5, 2011 at 9:00 AM, Brendon Anderson <br...@gmail.com> wrote:
> I am 100% sure. I am adding the header using Java code on Tomcat
> behind Apache. If I remove that particular line from the code, the
> Cache-Control: private header is not being sent.
>
> Java code, if it matters:
> response.addHeader("Cache-Control", "private");
>
> On Wed, Oct 5, 2011 at 8:53 AM, Tom Evans <te...@googlemail.com> wrote:
>> On Wed, Oct 5, 2011 at 2:16 PM, Brendon Anderson <br...@gmail.com> wrote:
>>> I am setting the Cache-Control: private header in a response on a
>>> certain url, but mod_cache is still caching this url.
>>>
>>> Response Headers as indicated by Firefox (Chrome reports similar results):
>>>
>>> Response Headers
>>> Date Wed, 05 Oct 2011 12:58:41 GMT
>>> Server Apache/2.2.20 (Win32) mod_jk/1.2.32
>>> Expires Wed, 05 Oct 2011 12:59:25 GMT
>>> Cache-Control private
>>> Content-Language en-US
>>> Content-Length 7046
>>> Age 15
>>> Content-Type text/html;charset=UTF-8
>>> X-Cache MISS from x.y.z.com
>>> Via 1.0 x.y.z.com:80 (squid/2.6.STABLE22)
>>> Proxy-Connection keep-alive
>>>
>>
>> Are you 100% sure that the Cache-Control header is being sent with the
>> content, and it is not being added by the Squid cache that you are
>> also going through?
>>
>> Cheers
>>
>> Tom
>>
>> ---------------------------------------------------------------------
>> The official User-To-User support forum of the Apache HTTP Server Project.
>> See <URL:http://httpd.apache.org/userslist.html> for more info.
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>>
>>
>
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Re: [users@httpd] mod_cache is caching content with Cache-Control:
private response headers
Posted by Brendon Anderson <br...@gmail.com>.
I am 100% sure. I am adding the header using Java code on Tomcat
behind Apache. If I remove that particular line from the code, the
Cache-Control: private header is not being sent.
Java code, if it matters:
response.addHeader("Cache-Control", "private");
On Wed, Oct 5, 2011 at 8:53 AM, Tom Evans <te...@googlemail.com> wrote:
> On Wed, Oct 5, 2011 at 2:16 PM, Brendon Anderson <br...@gmail.com> wrote:
>> I am setting the Cache-Control: private header in a response on a
>> certain url, but mod_cache is still caching this url.
>>
>> Response Headers as indicated by Firefox (Chrome reports similar results):
>>
>> Response Headers
>> Date Wed, 05 Oct 2011 12:58:41 GMT
>> Server Apache/2.2.20 (Win32) mod_jk/1.2.32
>> Expires Wed, 05 Oct 2011 12:59:25 GMT
>> Cache-Control private
>> Content-Language en-US
>> Content-Length 7046
>> Age 15
>> Content-Type text/html;charset=UTF-8
>> X-Cache MISS from x.y.z.com
>> Via 1.0 x.y.z.com:80 (squid/2.6.STABLE22)
>> Proxy-Connection keep-alive
>>
>
> Are you 100% sure that the Cache-Control header is being sent with the
> content, and it is not being added by the Squid cache that you are
> also going through?
>
> Cheers
>
> Tom
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
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> For additional commands, e-mail: users-help@httpd.apache.org
>
>
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Re: [users@httpd] mod_cache is caching content with Cache-Control:
private response headers
Posted by Tom Evans <te...@googlemail.com>.
On Wed, Oct 5, 2011 at 2:16 PM, Brendon Anderson <br...@gmail.com> wrote:
> I am setting the Cache-Control: private header in a response on a
> certain url, but mod_cache is still caching this url.
>
> Response Headers as indicated by Firefox (Chrome reports similar results):
>
> Response Headers
> Date Wed, 05 Oct 2011 12:58:41 GMT
> Server Apache/2.2.20 (Win32) mod_jk/1.2.32
> Expires Wed, 05 Oct 2011 12:59:25 GMT
> Cache-Control private
> Content-Language en-US
> Content-Length 7046
> Age 15
> Content-Type text/html;charset=UTF-8
> X-Cache MISS from x.y.z.com
> Via 1.0 x.y.z.com:80 (squid/2.6.STABLE22)
> Proxy-Connection keep-alive
>
Are you 100% sure that the Cache-Control header is being sent with the
content, and it is not being added by the Squid cache that you are
also going through?
Cheers
Tom
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