I’m interested in this answer as well but will offer what I’ve done so far.

In your example, the only thing I’ve added are these three lines in the location block:
proxy_cache_valid 200 1y;
proxy_cache_bypass 1;
proxy_no_cache 1;

But I am not sure I am doing this correctly because I am running into a situation where I don’t think the original request is staying intact.

Other settings that are common to both cache and bypass (also not sure these are all correct for bypassing):

proxy_cache_valid any 3m;
proxy_cache_revalidate on;
proxy_cache_use_stale error timeout updating invalid_header http_500 http_502 http_503 http_504;
proxy_cache_background_update on;
proxy_cache_lock on;
proxy_cache_methods GET HEAD;
proxy_cache_key "$scheme$host$request_uri";

proxy_ignore_headers X-Accel-Expires Expires Cache-Control Set-Cookie;

proxy_hide_header X-Accel-Expires;
proxy_hide_header Expires;
proxy_hide_header Cache-Control;
proxy_hide_header Set-Cookie;
proxy_hide_header Pragma;
proxy_hide_header Server;
proxy_hide_header Request-Context;
proxy_hide_header X-Powered-By;
proxy_hide_header X-AspNet-Version;
proxy_hide_header X-AspNetMvc-Version;

proxy_set_header X-Forwarded-Server $hostname;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Accept-Encoding identity;

server_tokens off;

___________________________________________
Michael Friscia
Office of Communications
Yale School of Medicine
(203) 737-7932 - office
(203) 931-5381 - mobile
http://web.yale.eduhttp://web.yale.edu/


From: nginx <nginx-bounces@nginx.org> on behalf of Joel Parker <joel.parker.gm@gmail.com>
Reply-To: "nginx@nginx.org" <nginx@nginx.org>
Date: Sunday, February 4, 2018 at 8:26 PM
To: "nginx@nginx.org" <nginx@nginx.org>
Subject: N00b: Forwarding the full request to upstream server

I have a situation where I receive a request like:
http://device.healthcheck.com/readyhttps://urldefense.proofpoint.com/v2/url?u=http-3A__device.healthcheck.com_ready&d=DwMGaQ&c=cjytLXgP8ixuoHflwc-poQ&r=wvXEDjvtDPcv7AlldT5UvDx32KXBEM6um_lS023SJrs&m=2v--tJwx48mcDQU2tBLN-_3_tkBnpxwWKrKWroagtgU&s=70i3CmgZEr7GzZVePY44rnixpncv8cZSqeRHA8FoCYA&e=
I want this to be sent to a server upstream but keep the full request intact. For example:

server {
resolver 8.8.8.8;
listen 80;

location / {
// send this too 192.168.10.34
proxy_pass $host:$server_port$uri$is_args$args;
}
}
I know this is probably easy to do but I am not sure how to accomplish this.
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