Trying to setup socket.io with Express [duplicate] - node.js

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Node.js app can't run on port 80 even though there's no other process blocking the port
(8 answers)
Closed 6 years ago.
I'm trying to setup Socket.io with Express, and I'm using the exact code from the Socket.io documentation, which is this:
var app = require('express')();
var server = require('http').Server(app);
var io = require('socket.io')(server);
server.listen(80);
app.get('/', function (req, res) {
res.sendfile(__dirname + '/index.html');
});
io.on('connection', function (socket) {
socket.emit('news', { hello: 'world' });
socket.on('my other event', function (data) {
console.log(data);
});
});
The error I'm getting when I'm running app.js is this:
events.js:141
throw er; // Unhandled 'error' event
^
Error: listen EACCES 0.0.0.0:80
at Object.exports._errnoException (util.js:849:11)
at exports._exceptionWithHostPort (util.js:872:20)
at Server._listen2 (net.js:1218:19)
at listen (net.js:1267:10)
at Server.listen (net.js:1363:5)
at Object.<anonymous> (/Users/leondewit/PhpstormProjects/websocket_test/app.js:5:8)
at Module._compile (module.js:434:26)
at Object.Module._extensions..js (module.js:452:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
Does anyone know what might be wrong?

Answer 1

You cannot bind to ports lower than 1024 in a system without sudo or admin permissions.
These ports are called privileged ports, here is a link to a wikipedia article with some ports and their associated services
Ideally when you are developing, for ease of use, you should uses a number generally higher than 3000 to be safe.