WebSockets

# this is where my WSGI server sits answering only on localhost
# usually this is Gunicorn monkey patched with gevent
upstream app_server_wsgiapp {
  server localhost:5000 fail_timeout=0;
}

server {

  # typical web server configuration goes here

  # this section is specific to the WebSockets proxying
  location /socket.io {
    proxy_pass http://app_server_wsgiapp/socket.io;
    proxy_redirect off;

    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_read_timeout 600;
  }
}