Hello!

On Fri, Oct 11, 2013 at 12:27:34AM +0200, Matt Spitz wrote:

> The HttpUpstreamModule states that variable values for
> $upstream_http_$HEADER are only valid for the last upstream accessed
> during a request. I'd like to know if there's a workaround.

[...]

The $upstream_* variables are cleared once nginx starts to work
with a new upstream. If you want to preserve values before
X-Accel-Redirect, you may do so by using "set" in a destination
location of X-Accel-Redirect (this works as rewrite directives are
executed before upstream data is re-initialized). E.g.:

location /api/ {
proxy_pass ...
}

location /internal/ {
set $previous_upstream_http_foo $upstream_http_foo;
proxy_pass ...
}

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

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