id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
2051	Issue with auth_request directive	marrcow@…		"Hello,

Description:
I have a variable `$host_header` defined in both places: on a server level and in a location block. My `proxy_set_header Host $host_header` directive is located inside the server section. When I make a request to this location, everything works as expected. The value of the Host header is taken from the location's `$host_header` variable. However, when I add the '''`auth_request`''' directive to my location section, the proxy_pass goes with the Host header taken from the server level. So, the `$host_header` variable defined in a location is skipped.

Here is the example code:


{{{
server {
listen 80;

server_name ""local.main.server"";
set $host_header ""server level"";

proxy_set_header Host $host_header;

location /test {
    auth_request /auth;

    set $host_header ""location level"";

    proxy_pass http://test-nginx;
}

location = /auth {
    internal;

    proxy_pass_request_body off;
    proxy_set_header Content-Length """";
    proxy_set_header X-Original-URI $request_uri;

    # this simply returns 200
    proxy_pass http://test-nginx;
}
}

}}}
"	defect	closed	major	nginx-1.19	nginx-module	1.19.x	invalid	auth_request	marrcow@…	Linux 78df63f5fdf1 4.19.76-linuxkit #1 SMP Tue May 26 11:42:35 UTC 2020 x86_64 GNU/Linux	"nginx version: nginx/1.19.1
built by gcc 8.3.0 (Debian 8.3.0-6) 
built with OpenSSL 1.1.1d  10 Sep 2019
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-compat --with-file-aio --with-threads --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-mail --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-cc-opt='-g -O2 -fdebug-prefix-map=/data/builder/debuild/nginx-1.19.1/debian/debuild-base/nginx-1.19.1=. -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fPIC' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -Wl,--as-needed -pie'"