how to communicate to middleware.js

[ashishg-dev]

Hi Sir/Madam,
I'm new to js and new your help.
I have created one api in node say (http://localhost:4001/askbot) and a chat UI on Android Mobile app, Allowing the mobile app to connect to the same api.
when mobile app hit api, then my server.js receive the request but unable to connect to middleware.js.
How do I send request parameter (user message) say "Petrol price for today" to middleware.js and also handle the event with controller.hears()...
Please help me to solve this problem.
Thanks in advance