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From "Mohammed Salih" <linus...@gmail.com>
Subject Re: [users@httpd] Adding a Header to the httpd response
Date Tue, 22 Apr 2008 07:55:54 GMT
Thank you Joshua for your response,

I tried to use the SetEnvIf and Header combination before, but as you
said SetEnvIf is only useful for the request headers.
So can you please help me in creating the negative-lookahead regex. I
am very bad at regex.

Thanks in advance.
Salih

On Mon, Apr 21, 2008 at 6:47 PM, Joshua Slive <joshua@slive.ca> wrote:
> On Mon, Apr 21, 2008 at 10:34 AM, Joshua Slive <joshua@slive.ca> wrote:
>  > On Mon, Apr 21, 2008 at 9:38 AM, Mohammed Salih <linusali@gmail.com> wrote:
>  >  > Thank you all for your reply.
>  >  >
>  >  >  Yes I am using Header to set the Cache-Control header. and it is doing
>  >  >  it job. but some times the application might have already set this
>  >  >  header. So I want to avoid setting it again using the Header module.
>  >  >
>  >
>  >  See example #4:
>  >  http://httpd.apache.org/docs/2.2/mod/mod_headers.html#examples
>  >
>  >  SetEnvIf Cache-Control .+ got-cache-control=1
>  >  Header set Cache-Control blah env=!got-cache-control
>
>  Oh, wait a sec. That's not going to work because SetEnvIf matches
>  request headers, not response headers.
>
>  You could try "Header edit" using a negative-lookahead regex to
>  exclude requests already containing something in Cache-Control. Other
>  than that, I think this would require a simple custom module.
>
>
>
>  Joshua.
>
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