express-routes-versioning/examples/example2.js

Node.js module provides versioning for expressjs routes/api

var express = require('express');
var app = express();
var router = express.Router();
app.use(router);
app.listen(3000);

var routesVersioning = require('../index')();

//By default, accept-version headers are used for versioning,
//below middleware overrrides it by setting req.version
router.use(function(req, res, next) {
    req.version = '3.0.0';
    next();
});

router.get('/test', routesVersioning({
   "^1.0.0": respondV1,
   "~2.2.1": respondV2,
   "3.0.0": respondV3,
}, NoMatchFoundCallback));


function NoMatchFoundCallback(req, res, next) {
    res.status(404).send('version not found');
}

function respondV1(req, res, next) {
   res.status(200).send('ok v1');
}

function respondV2(req, res, next) {
   res.status(200).send('ok v2');
}
//this callback is always called here as req.version is provided as 3.0.0
function respondV3(req, res, next) {
   res.status(200).send('ok v3');
}