server.js

var express = require('express'),
    wines = require('./routes/wines');

var app = express();

app.get('/wines', wines.findAll);
app.get('/wines/:id', wines.findById);

app.listen(3000);
console.log('Listening on port 3000...');

wines.js

exports.findAll = function(req, res) {
    res.send([{name:'wine1'}, {name:'wine2'}, {name:'wine3'}]);
};

exports.findById = function(req, res) {
    res.send({id:req.params.id, name: "The Name", description: "description"});
};