Can't make socket.io work on HTTPS

Question

I'm using simple socket.io 2.0.3 server without express or anything similar to run simple chat feature in my Laravel app.

Everything was working well until I decided to switch website to HTTPS. Now socket.io refuses to connect (ERR_CONNECTION_CLOSED).

Here is my simplest setup:

server.js:

var io = require('socket.io')(8080, {
    origins : //some stuff
});

HTML file

<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.3/socket.io.js"></script>

var socket = io(':8080');
//more stuff

I have all needed certificate files in server folder, intermediate.crt, domain.com.crt and domain.com.key

Can someone help with simplest example how to make this work on https? Thanks in advance!

Edit: Need possible solution without using Express.

Possible duplicate of [node.js, socket.io with SSL](https://stackoverflow.com/questions/6599470/node-js-socket-io-with-ssl) It looks to me like that thread should have everything you need. — Robert Moskal, Oct 15 '17 at 15:21
It's not enough to to simply include the client code in the browser. There needs to be a server side co component somplace. — Robert Moskal, Oct 15 '17 at 15:29
You don't need express, but once you have sockets running, the above link tells you how to connect the client up. — Robert Moskal, Oct 15 '17 at 15:49

Mister M · Accepted Answer · 2017-10-17T13:27:14.247

I couldn't manage to write this in simple socket.io code, so I ended up using express after all.

Here is the simplest working code if anyone needs it in future:

server.js

var express = require('express');
var app = module.exports = express();
var https = require('https');
var fs = require('fs');
var server = https.createServer({
    key: fs.readFileSync(/*full path to your key*/),
    cert: fs.readFileSync(/*full path to your cert*/),
    ca: fs.readFileSync(/*full path to your intermediate cert*/),
    requestCert: true,
    rejectUnauthorized: false
},app);
server.listen(8080); //listen on port 8080

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

io.set('origins', /*your desired origins*/);

io.set('transports', ['websocket',
    'flashsocket',
    'htmlfile',
    'xhr-polling',
    'jsonp-polling',
    'polling']);

var sockets = {};
//your socket logic

in HTML:

var socket = io(':8080',{secure: true});

In origin which URL do we need to set backend URL of socket or application URL? — Parth Shah, Oct 26 '21 at 07:09

score 0 · Answer 2 · answered Oct 15 '17 at 15:41

0

You can create an instance of an HTTPS server with all your relevant settings

var https = require('https');
https.createServer(options, app).listen(443);

Then simply pass it to the constructor:

new SocketIo(https)

answered Oct 15 '17 at 15:41

vfioox

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score 0 · Answer 3 · answered Oct 15 '17 at 15:55

Important facts :

You must use https not http , Need to load crt files and create options object like in example Client side need only correct address like : https://YOUR_domain.com:PORT

Server side :

//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
//High definition
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
// Globals 
//var MEMORY_CLEANER_INTERVAL = 5000;
//var crypto = require('crypto');
var tls = require('tls');
//dl  = require('delivery');
var fs = require("fs");
var mysql      = require('mysql');
var express    = require("express");
var app = express();
var http = require('http');
var https = require('https');
//var mkdirp = require('mkdirp');
var path = require('path');
//var nodemailer = require('nodemailer');
//includer
function read(f) {return fs.readFileSync(f).toString();}
function include(f) {eval.apply(global, [read(f)]);}

//var BASE = require('./lib/level1_module');
//BASE.NAME = "YEap";

var pkey = fs.readFileSync('/etc/httpd/ssl/YOUR_FILE.key');
var pcert = fs.readFileSync('/etc/httpd/ssl/YOUR_FILE_com.crt')

var SERVER_PORT = 9000;
 var options = {
    hostname: 'YOUR_PAGE.com',
    port: 9000,  
    key: pkey, 
    cert: pcert,
    requestCert: true,
    rejectUnauthorized: false,
};

var server = https.createServer(options, app).listen(SERVER_PORT, function(){
  console.log("Express server listening on port " + SERVER_PORT);
});  

var io = require('socket.io').listen(server);
server.listen(SERVER_PORT);
console.log('Socket server listening on port : ' , SERVER_PORT);

why are you calling `.listen` twice on the https server? – Daniel Lizik Nov 22 '18 at 08:22 — Daniel Lizik, Nov 22 '18 at 08:22

Can't make socket.io work on HTTPS

3 Answers3