Our First Express Server, p. 192, Learning Web App Dev

server-192.js

var express = require("express"),
  http = require("http"),
  app;

// Create our Express-powered HTTP server
// and have it listen on port 3000
app = express();
http.createServer(app).listen(3000);

// set up our routes
app.get("/hello", function(req, res) {
  res.send("Hello World!");
});

app.get("/goodbye", function(req, res) {
  res.send("Goodbye World!");
});

console.log("Server running on port 3000");