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Posted to users@httpd.apache.org by Amit Panwar <am...@imfinity.com> on 2010/04/09 15:14:57 UTC

[users@httpd] Reverse proxy - Getting CGI environment variable on backend server

Hi All,

I'm using reverse proxy to forward request to my internal apache server, 
which is working fine.
Here is my configuration on front apache server:

    ProxyRequests Off
    ProxyPassInterpolateEnv On
    ProxyPass /someapp http://internal_server/someapp interpolate
    ProxyPassReverse /someapp http://internal_server/someapp interpolate

I want to access the CGI environment variables on my backend servers.

Actually I want to setup a shibboleth environment my Shibboleth Service 
provider is running on my front end apache server and shibboleth 
protected application on internal server. After authentication Server 
provider set some attributes on front end server's environment and I 
want those attributes to be accessible to my application running on 
backend apache server. So is it possible to forward some environment 
variable from front server to backend servers and if yes then how?

Thanks in advance
ap1285






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Re: [users@httpd] Reverse proxy - Getting CGI environment variable on backend server

Posted by Octavian Rasnita <or...@gmail.com>.
From: "Amit Panwar" <am...@imfinity.com>
To: <us...@httpd.apache.org>
Sent: Friday, April 09, 2010 4:14 PM
Subject: [users@httpd] Reverse proxy - Getting CGI environment variable on 
backend server


> Hi All,
>
> I'm using reverse proxy to forward request to my internal apache server, 
> which is working fine.
> Here is my configuration on front apache server:
>
>    ProxyRequests Off
>    ProxyPassInterpolateEnv On
>    ProxyPass /someapp http://internal_server/someapp interpolate
>    ProxyPassReverse /someapp http://internal_server/someapp interpolate
>
> I want to access the CGI environment variables on my backend servers.
>
> Actually I want to setup a shibboleth environment my Shibboleth Service 
> provider is running on my front end apache server and shibboleth protected 
> application on internal server. After authentication Server provider set 
> some attributes on front end server's environment and I want those 
> attributes to be accessible to my application running on backend apache 
> server. So is it possible to forward some environment variable from front 
> server to backend servers and if yes then how?
>
> Thanks in advance


I use to set HTTP headers in the configuration file of the proxy/load 
balancer:

RequestHeader set X-HTTPS On

All the requests to the SSL virtualhost will have an HTTP header
X-HTTPS: On

This header can be verified in the back-end server/application.

In order to use this directive, you need to load the module mod_headers.

Octavian


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Re: [users@httpd] Reverse proxy - Getting CGI environment variable on backend server

Posted by Tom Evans <te...@googlemail.com>.
On Fri, Apr 9, 2010 at 2:14 PM, Amit Panwar <am...@imfinity.com> wrote:
> Hi All,
>
> I'm using reverse proxy to forward request to my internal apache server,
> which is working fine.
> Here is my configuration on front apache server:
>
>   ProxyRequests Off
>   ProxyPassInterpolateEnv On
>   ProxyPass /someapp http://internal_server/someapp interpolate
>   ProxyPassReverse /someapp http://internal_server/someapp interpolate
>
> I want to access the CGI environment variables on my backend servers.
>
> Actually I want to setup a shibboleth environment my Shibboleth Service
> provider is running on my front end apache server and shibboleth protected
> application on internal server. After authentication Server provider set
> some attributes on front end server's environment and I want those
> attributes to be accessible to my application running on backend apache
> server. So is it possible to forward some environment variable from front
> server to backend servers and if yes then how?
>
> Thanks in advance
> ap1285
>
>

Convert them into additional request headers:

RequestHeader set X-Shib-Attribute %{Shib-Attribute}e

Cheers

Tom

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