auth.py

import wsgiref
from wsgiref.util import setup_testing_defaults
from wsgiref.simple_server import make_server

def simple_app(environ, start_response):
    setup_testing_defaults(environ)
    
    if 'HTTP_AUTHORIZATION' in environ:
      print('Authed!')
      status = '200 OK'
      headers = [('Content-Length', '0')]
    else:
      status = '401 FORBIDDEN'
      headers = [('WWW-Authenticate', 'Basic realm="nmrs_m7VKmomQ2YM3:"'), ('Content-Length', '0')]

    start_response(status, headers)
    
    return [b"sefsefsefsefef"]

httpd = make_server('', 8080, simple_app)
print("Serving on port 8080...")
httpd.serve_forever()

nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    keepalive_timeout  65;

    server {
        listen       localhost:80;
        server_name  localhost;

        location / {
            root   html;
            index  index.html index.htm;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
        
        location /priv {
          auth_request /auth;
        }
        
        location = /auth {
          proxy_pass http://localhost:8080;
          proxy_pass_request_body off;
          proxy_set_header Content-Length "";
          proxy_set_header X-Original-URI $request_uri;
        }
    }
}