gistfile1.txt

http {
  # See http://nginx.org/en/docs/http/websocket.html
  map $http_upgrade $connection_upgrade {
      default upgrade;
      ''      close;
  }
  
  server {
    location ... {
      # Proxy configuration.
      proxy_pass http://127.0.0.1:8001;
      proxy_http_version 1.1;
      proxy_set_header Connection $connection_upgrade;
      proxy_set_header Host $host;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
      proxy_cache_bypass $http_upgrade;
      # Gateway timeout.
      proxy_read_timeout 3600s;
      proxy_send_timeout 3600s;
    }
  }
}