Hello!

On Fri, Aug 09, 2013 at 06:20:21AM -0400, gray wrote:

> My config
>
> location ~ /cached/ {
> proxy_pass http://apache;
> proxy_cache cache;
> proxy_cache_valid 2h;
> proxy_cache_key "$host|$request_uri";
>
> }
>
> location /htdocs_internal/ {
> internal;
>
> alias $htdocs_path;
> }
>
> Requests with header in reply X-Accel-Redirect not cached, every time
> request is sent to apache. When i add these directives
> proxy_pass_header X-Accel-Redirect;
> proxy_ignore_headers X-Accel-Redirect;
> cache works fine (but is useless :) ), so it isn't problem with "no cache"
> headers from apache.

Yes, proxy_cache can't cache responses with X-Accel-Redirect.

As a workaround, you may use an additional proxy layer with
proxy_cache and proxy_ignore_headers X-Accel-Redirect +
proxy_pass_headers X-Accel-Redirect.

--
Maxim Dounin
http://nginx.org/en/donation.html

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