Use URL Parameters in Express.js Rest API

var DemoAPI = {
    hello: function (request, response) {
        response.setHeader('Content-Type', 'text/plain');
        response.send('Hello ' + request.params.fullName);
    },
    sum: function (request, response) {
        response.setHeader('Content-Type', 'text/plain');
        var result = parseInt(request.params.a) + parseInt(request.params.b);
        response.send(result.toString());
    }
};

module.exports = DemoAPI;

var express = require('express');
var router = express.Router();

var DemoAPI = require('./demo.api');

router.get('/demo/hello/:fullName', DemoAPI.hello);
router.get('/demo/sum/:a/:b', DemoAPI.sum);

module.exports = router;

var express = require('express');
var app = express();

app.use('/api', require('./api/index'));

app.listen(9090, function () {
    var host = server.address().address;
    var port = server.address().port;
    console.log("Server listening at http://%s:%s", host, port)
});