location / {
      root   /home/xxxx;
      index  index.html index.htm;
      set $fname $request_filename;

      proxy_pass         http://xx.xxx.xxx.xxx:8080/;
      proxy_redirect     off;
  }

  location /dl {
      root /home/xxx/1;
      internal;
      post_action /download-stop;
  }

  location /cgi-bin/ {
    proxy_pass http://xx.xxx.xxx.xxx:8080/;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }
  location /download-stop {
      internal;
      rewrite ^ /cgi-bin/dwnl_stop.php?bs=$body_bytes_sent&fname=$fname&rem_addr=$remote_addr last;
  }