Re: Automatically set Keep-Alive response header

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On Wed, Aug 4, 2021 at 12:59 PM Christopher Schultz
<chris@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Reic,
>
> On 8/4/21 11:17, Eric Covener wrote:
> > On Wed, Aug 4, 2021 at 11:08 AM Christopher Schultz
> > <chris@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> >>
> >> All,
> >>
> >> Can httpd automatically set Keep-Alive response header based upon the
> >> KeepAlive and other configuration settings?
> >>
> >> Something like this:
> >>
> >> HTTP/1.1 200 OK
> >> Server: Apache/2
> >> Date: Wed, 04 Aug 2021 15:00:00 GMT
> >> Content-Length: 12345
> >> Connection: keep-alive
> >> Keep-Alive: timeout=5; max=100
> >
> >> I'm interested in httpd generating that last response-header for me.
> >
> > httpd does generate this by default, matching your settings.  You will
> > even see the "max" tick down.
>
> Hmm. I'm not seeing that. I'm using httpd 2.4.48 as provided by Amazon
> Linux's yum repository.
>
> $ wget -SO /dev/null https://my.site/
>
>    HTTP/1.1 200 200
>    Cache-Control: no-cache, no-store, must-revalidate
>    Content-Type: text/html;charset=UTF-8
>    Date: Wed, 04 Aug 2021 16:57:00 GMT
>    Expires: 0
>    Permissions-Policy: interest-cohort=()
>    Pragma: no-cache
>    Server: Apache/2
>    Strict-Transport-Security: max-age=15552000
>    X-Content-Type-Options: nosniff
>    Content-Length: 10799
>    Connection: keep-alive
>
> I will note that it's going through Amazon's Elastic Load balancer, so
> perhaps the header is being stripped.

This is probably it.  The Keep-Alive header is hop-by-hop since if you
have a proxy between you and the server, the "connection" being kept
alive isn't really the one you have access to.

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