CODEWITHSUNDEEP
node.jssocket.io
raiym
raiym

Reputation: 1499

What is best practice for separating socket.io related code in NodeJS app?

I am new to NodeJS. So I am writing NodeJS application with socket.io.

I understand how to separate controllers. In my app I created: controllers/userCtrl.js controller/marketCtrl.js etc. And in userCtrl.js controller I did like this: 

exports.create = function(req, res) {
    // Create user
}

// Other actions

In application I use it: 

// ...
var userCtrl = require('./controllers/userCtrl');
app.post('/user', userCtrl.create);
// ...

With models the same. But I have a lot of socket.io related code in app.js and don't understand how remove it (like controllers) from app.js: 

var frontend = io.of('/frontend');
frontend.on('connection', function (client) {
logger.info('Someone connected to frontend socket');
client.on('join', function (message) {
    logger.info('In join event');
    var token = message.token;
    if (!token) {
        logger.debug('No usertoken provided. Sending login required');
        client.emit('join', {error: 103, message: 'Login required', data: null});
        return;
    }
//... etc..

My question is: How to split socket.io related code into files? What is best practice for it? Thank you!

Upvotes: 2

Views: 1837

Answers (1)

clay
clay

Reputation: 6017

Different files is still the way. Use exports or module.exports and then just require in your app.js.

Perhaps make a setup() function that takes in an app/http instance, or whatever else you need in your socket.io stuff, and then call that function at the right time in app.js.

-- socketSetup.js --

'use strict';
var io = require('socket.io');
function setup( app, logger, whatever ){
  //do stuff here
}
module.exports = setup;

-- app.js --

'use strict';
var express = require('express');
var socketSetup = require('./socketSetup.js');

var app = express();
//other express things

//setup the socket stuff
socketSetup( app, logger );

The result is a shorter and more readable app.js file, and your socket setup is contained as well. Repeat as things grow in your socketSetup.js file as well.

Upvotes: 1

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