How to control Apache via Django to connect to mongoose(another HTTP server)?
If you have control over what runs on the device side, consider using XML-RPC to talk from client to server.
I have been doing lots of searching and reading to solve this.
The main goal is let a Django-based web management system connecting to a device which runs a http server as well. Django will handle user request and ask device for the real data, then feedback to user.
Now I have a "kinda-work-in-concept" solution:

Browser -> Apache Server: Browser have jQuery and HTML/CSS to collect user request.
Apache Server-> Device HTTP Server:

Apache + mod_python(or somesay Apache + mod_wsgi?) , so I might control the Apache to do stuff like build up a session and cookies to record login.
But, this is the issue actually bugs me. 
How to make it work? Using what to build up socket connection between this two servers?