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Posted to users@tomcat.apache.org by Jose María Zaragoza <de...@gmail.com> on 2012/11/16 21:38:00 UTC
Modify Cache-Control header
Hi:
I'm using Tomcat 6 ( I don't remember the exact release, I hope to be
forgiven by Pid )
I need to modify Cache-Control header in some responses ( forcing them
to not be cached )
What is the best way to do it ?
a) To implement a Valve ( check request context path and if it match
,to modify response header )
b) To implement a filter
c) Others ( any property in Tomcat's configuration files that I don't know )
Thanks and regards
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Re: Modify Cache-Control header
Posted by Konstantin Kolinko <kn...@gmail.com>.
2012/11/18 Terence M. Bandoian <te...@tmbsw.com>:
> On 11/16/2012 2:38 PM, Jose María Zaragoza wrote:
>>
>> Hi:
>>
>> I'm using Tomcat 6 ( I don't remember the exact release, I hope to be
>> forgiven by Pid )
>>
>> I need to modify Cache-Control header in some responses ( forcing them
>> to not be cached )
>> What is the best way to do it ?
>>
>> a) To implement a Valve ( check request context path and if it match
>> ,to modify response header )
>> b) To implement a filter
>> c) Others ( any property in Tomcat's configuration files that I don't
>> know )
>>
>> Thanks and regards
>>
>
> Hi, Jose-
>
> If you have access to the JSP or Java, you might use something like this:
>
> response.setHeader( "Expires", "-1" );
> response.setHeader( "Cache-Control", "no-cache" );
>
> See
> http://docs.oracle.com/javaee/6/api/index.html?javax/servlet/http/HttpServletResponse.html
>
+1.
UrlRewriteFilter can be used to set headers, if you do not want to
write the code by yourself.
http://wiki.apache.org/tomcat/AddOns
ExpiresFilter is available in Tomcat 7
Best regards,
Konstantin Kolinko
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Re: Modify Cache-Control header
Posted by "Terence M. Bandoian" <te...@tmbsw.com>.
On 11/16/2012 2:38 PM, Jose María Zaragoza wrote:
> Hi:
>
> I'm using Tomcat 6 ( I don't remember the exact release, I hope to be
> forgiven by Pid )
>
> I need to modify Cache-Control header in some responses ( forcing them
> to not be cached )
> What is the best way to do it ?
>
> a) To implement a Valve ( check request context path and if it match
> ,to modify response header )
> b) To implement a filter
> c) Others ( any property in Tomcat's configuration files that I don't know )
>
> Thanks and regards
>
Hi, Jose-
If you have access to the JSP or Java, you might use something like this:
response.setHeader( "Expires", "-1" );
response.setHeader( "Cache-Control", "no-cache" );
See
http://docs.oracle.com/javaee/6/api/index.html?javax/servlet/http/HttpServletResponse.html
-Terence Bandoian
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Re: Modify Cache-Control header
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Hash: SHA1
Jose,
On 11/16/12 3:38 PM, Jose María Zaragoza wrote:
> I need to modify Cache-Control header in some responses ( forcing
> them to not be cached ) What is the best way to do it ?
>
> a) To implement a Valve ( check request context path and if it
> match ,to modify response header ) b) To implement a filter c)
> Others ( any property in Tomcat's configuration files that I don't
> know )
I would avoid writing a Valve unless you must: a Valve will tie you to
Tomcat and possibly to a particular version of Tomcat in some cases.
I don't believe Tomcat will mutate your Cache-Control headers so you
are probably safe using a Filter.
I can't really imagine another way to do this besides writing a Filter
or Valve (without using a reverse-proxy as Igor suggests).
- -chris
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Re: Modify Cache-Control header
Posted by Igor Cicimov <ic...@gmail.com>.
On 17/11/2012 7:38 AM, "Jose María Zaragoza" <de...@gmail.com> wrote:
>
> Hi:
>
> I'm using Tomcat 6 ( I don't remember the exact release, I hope to be
> forgiven by Pid )
>
> I need to modify Cache-Control header in some responses ( forcing them
> to not be cached )
> What is the best way to do it ?
>
> a) To implement a Valve ( check request context path and if it match
> ,to modify response header )
> b) To implement a filter
> c) Others ( any property in Tomcat's configuration files that I don't
know
Or put apache infront and use mod_expiers
>
> Thanks and regards
>
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> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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>