nginx not returning updated headers from origin server on conditional GET

[Maxim Dounin]

Hello!

On Wed, Sep 14, 2016 at 02:19:25AM -0400, jchannon wrote:

> NGINX authors might want to read this thread. Essentially Mark is saying
> that this is a bug
> https://twitter.com/darrel_miller/status/775684549858697216

The fact that headers are not merged is one of the main reasons 
why proxy_cache_revalidate is not switched on by default.

As for the headers specifically mentioned in this thread:

- nginx do update Date header (actually, this is the only header 
  updated);

- nginx do not support Age header at all, see 
  https://trac.nginx.org/nginx/ticket/146.

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