Node.js/Express.js App Only Works on Port 3000

The following works if you have something like this in your app.js:

http.createServer(app).listen(app.get('port'),  function(){    console.log("Express server listening on port " + app.get('port'));});

Either explicitly hardcode your code to use the port you want, like:

app.set('port', process.env.PORT || 3000);

This code means set your port to the environment variable PORT or if that is undefined then set it to the literal 3000.

Or, use your environment to set the port. Setting it via the environment is used to help delineate between PRODUCTION and DEVELOPMENT and also a lot of Platforms as a Service use the environment to set the port according to their specs as well as internal Express configs. The following sets an environment key=value pair and then launches your app.

$ PORT=8080 node app.js

In reference to your code example, you want something like this:

var express = require("express");var app = express();// sets port 8080 to default or unless otherwise specified in the environmentapp.set('port', process.env.PORT || 8080);app.get('/', function(req, res){    res.send('hello world');});// Only works on 3000 regardless of what I set environment port to or how I set// [value] in app.set('port', [value]).// app.listen(3000);app.listen(app.get('port'));

In bin/www, there is a line:

var port = normalizePort(process.env.PORT || '3000');

Try to modify it.

Try this

$ PORT=8080 node app.js