Proxy cache of X-Accel-Redirect, how?

Server NGINX
1

Hi!
Tried to cache the X-Accel-Redirect responses from Phusion Passenger
application server with the use of a second layer without success
(followed
the hint on Re: proxy_cache seems not working with X-Accel-Redirect).

Configuration:

  1. Application server (Phusion Passenger)
    adds X-Accel-Redirect header to response
    sends to

  2. NGINX server
    >> tries to cache <<
    proxy_ignore_headers X-Accel-Redirect;
    proxy_pass_header X-Accel-Redirect;
    passenger_pass_header X-Accel-Redirect;

      sends to

  3. NGINX server
    delivers file

But caching of the reuest on server (2) does not work.
Any idea?

Posted at Nginx Forum: