express.js - how to intercept response.send() / response.json()

Question

Lets say I have multiple places where I call response.send(someData). Now I want to create a single global interceptor where I catch all .send meth

Answer 1

Yes this is possible. There are two ways to do this, one is to use a library that provides the interception, with the ability to run it based on a specific condition: https://www.npmjs.com/package/express-interceptor

The other option is to just create your own middleware (for express) as follows:

function modify(req, res, next){
  res.body = "this is the modified/new response";

  next();
}
express.use(modify);