How to retrieve HTTP header from Apache in nginx?

[Alex Man]

Hi Igor,

Thanks for your response.

Actually, I'm using nginx as a load balancer for a number of ZEO 
clients and a ZEO server. So the more precise picture should be

Aapche -> Squid -> nginx -> ZEO clients -> ZEO server (Plone)

The reason that I'm using nginx as a load balancer is that is has 
<http://wiki.codemongers.com/NginxHttpUpstreamFairModule>Fair Proxy 
Balancer that Apache and Squid don't have.

Since I've tried taking nginx out of the chain and I see that Plone 
recognize the header, there must be something about nginx that's 
causing it. Do you have any idea on that? My nginx.conf is something like this

worker_processes 1;

events {
     worker_connections 256;
}

http {
     upstream zeo_clients {
         server <ip_of_zeo_client1>;
         server <ip_of_zeo_client2>;
         ....
         fair;
     }

     server {
         listen 3800;
         server_name  localhost;

         location / {
             proxy_pass http://zeo_clients;
         }
     }
}

Thanks a lot!

At 10:13 PM 9/9/2008, Igor Sysoev wrote:
>On Tue, Sep 09, 2008 at 01:53:04PM -0700, Alex Man wrote:
>
> > I have the following setup:
> >
> > Apache -> Squid -> nginx -> Zope
> >
> > Zope needs a header that is set by Apache in httpd.conf like the following:
> >
> > RequestHeader set USER %{VALUE}
> >
> > My question is, how can I ask nginx to pass on this header to Zope?
> > I'm sure nginx is the problem because if I take nginx out of the chain:
> >
> > Apache -> Squid -> Zope
> >
> > Zope can immediately see the header.
> >
> > I tried using the proxy_set_header directive like the following in
> > nginx.conf
> >
> > proxy_set_header USER $USER
> >
> > but it doesn't seem to work.
>
>You should do nothing on nginx side: it will pass the header to Zope by
>default.
>
>BTW, I think that nginx is unneccessary in this chain:
>
>  Apache -> Squid -> nginx -> Zope
>
>and probably
>
>  Squid -> Apache -> Zope
>
>is more logical chain.
>
>
>--
>Igor Sysoev
>http://sysoev.ru/en/

Regards,

Alex 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://nginx.org/pipermail/nginx/attachments/20080910/e8455666/attachment.html>