Question

165

Socket.io error hooking into express.js

rated 0 times [ 167] [ 2] / answers: 1 / hits: 30198 / 10 Years ago, mon, july 28, 2014, 12:00:00

I'm trying to hook socket.io and express.js together:

var socket = require('./socket_chat/socket.js');



var express = require('express'),

    app = module.exports.app = express();



    var io = require('socket.io').listen(app);



    app.use(express.static(__dirname + '/app'));



io.sockets.on('connection', socket);

At the line: var io = require('socket.io').listen(app); I'm getting an error:

Error: You are trying to attach socket.io to an expressrequest handler function. Please pass a http.Server instance.

There doesn't seem to be anything on SO/google about this error...

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

jack

Add To Favorites

Follow

Total Points: 557

Total Questions: 96

Total Answers: 80

Location: Saint Helena

Member since Mon, Jan 16, 2023

1 Year ago

answered 10 Years ago kourtney · Accepted Answer

You can do it without using http module

app.listen return a server instance you can use for socket.io

const express = require('express');

const app = express();

const server = app.listen(port, () => {

    console.log(Listening on port:  + port);

});

const io = require('socket.io')(server);