SID Killer nginx.conf

server {
  listen 80 default_server;
  server_name www.tripelover.com;
  root /usr/share/nginx/html;
  index index.html index.htm;

  location / {
    #### Backend ====> Proxy ----> User
    # Sanitize Session IDs from <href=""> links in response HTML
    # Note: Compression must be disabled on the backend server,
    #   otherwise this won't work
    subs_filter 'sid=([\w\d]{32})' '' ir;

    # Invalidate cookie if user logs out
    if ($args ~ mode=logout) {
        add_header Set-Cookie 'sessionid=deleted; path=/; domain=.tripelover.com; Expires=Thu, 01-Jan-1970 00:00:01 GMT';
        # Sanitise 'sid=' from Location: header sent by the backend
        more_set_headers 'Location: http://www.tripelover.com/';
    }

    # This is where the magic happens
    # The 'sid=' query parameter from the backend is replaced with a cookie
    if ($args !~ mode=logout) {
        header_filter_by_lua_file /etc/nginx/sid_killer.lua;
    }

    #### User ----> Proxy ====> Backend
    # Add 'sid=' query parameter back from cookie for the backend application server
    if ($args !~ sid) {
        rewrite ^(.*)$ $1?sid=$cookie_sessionid;
    }

    # This is where the legacy application is hosted
    proxy_pass http://127.0.0.1:8080;
    proxy_set_header Host $host;
  }
}