How to save into variable proxy header response?

[Maxim Dounin]

Hello!

On Sun, Apr 20, 2014 at 05:29:10AM -0400, google000 wrote:

> I have tryeid to do something like this but it seems that variable
> $upstream_http_content_disposition is empty.. when I want to redirect to
> different url..
> 
> proxy_pass http://www.domainresultget.com;
> set $x $upstream_http_content_disposition;
> return 301 http://domaintest.com/test.php?x=$x;
> 
> variable $x is empty..

This is not going work, as "return 301" will happen before the 
proxy_pass.  See here for basic explanation on how rewrite module 
works:

http://nginx.org/en/docs/http/ngx_http_rewrite_module.html.

It looks like you want nginx to do a request to upstream server, 
and then return a completely different response to a client.  In 
case of 200 responses, this is something that can be done, e.g., 
by using auth request module, see here:

http://nginx.org/en/docs/http/ngx_http_auth_request_module.html

It might also be a good idea to change your backends to actually 
return responses you want to be returned to clients instead of 
trying to change them with nginx configs.

-- 
Maxim Dounin
http://nginx.org/