how to extend express js res object in NodeJs
As loadaverage pointed out, middleware is how you do it. For some more specificity:
app.use(function(req, res, next) { res.jsonFail = function(users) { return res.json({ success: false, payload: users }) }; res.jsonSuccess = function(users) { return res.json({ success: true, payload: users }); }; next();});and then this should work:
app.get("/my/route", function(req, res) { return res.jsonSuccess(["you", "me"]);});
Sometimes I want to extend current method with new method.For example, log everything that I sent.
This what you can do:
app.use(function (req, res, next) { var _send = res.send res.send = function (data) { console.log('log method on data', data) // Call Original function _send.apply(res, arguments) })})