How to add a res.send() handler to Express.js?

Question

Express.js

I have a server written in Express.js
How can I add a handler to be called before each call to res.send()?
Something I'm confused...

Answer 1

Through use, rewrite the response function

app.use(function (req, res) {
    var send = res.send;
    res.send = function (body) {
        // тут что надо делай
        send.call(this, body);
    };
});