What functions is the controller responsible for in MVC on express?

Question

Express.js

What is the controller in express responsible for with its middleware chain? I have several options in my head:

1) Only for routing. Accepts urls and redirects all responsibility to another module.

//controller.js
router.get('/', business.indexPageMiddlewareList)

2) Only for the processing sequence. Router.js should be responsible for routing, in the controller there is only a sequence of middleware and business logic at the end

//controller.js
const indexPage = [loggermiddleware, ...., business.getpage]

3) For routing and processing sequence. PS: the controller starts doing the two functions above.

//controller.js
router.get('/', logger_middleware, auth_middleware, business.indexPage)

4) The controller is only responsible for the business logic

//controller.js
const get_data = (req, res, next) => {}....

Answer 1

without binding to express: controller is a simple dispatcher between request and response. it should be as blunt as possible.
middleware can work generally before the controller.