Use socket.io with HTTPS instead of HTTP - sockets

Question

I am using self-signed certificated to encrypt traffic data.
My .crt and .key files are located at /etc/nginx/ssl/
(some_file.key and some_file.crt)
I was using socket.io over http but tried to get it over to https. Here is my actual code:
var formidable = require('formidable');
var express = require('express');
var fs = require('fs');
var privateKey = fs.readFileSync('../etc/nginx/ssl/some_file.key').toString();
var certificate = fs.readFileSync('../etc/nginx/ssl/some_file.crt').toString();
//how can I exclude this? (I have no intermediate, should I?)
var ca = fs.readFileSync('../intermediate.crt').toString();
var app = express.createServer({key:privateKey,cert:certificate,ca:ca });
var io = require('socket.io');
app.listen(3000, function(){
//wait on 3000
});
app.post('/posts', function(req, res){
//server communication
});
io.on('connection', function(socket){
//wait on connections
});
Client-side:
var socket = io(url + ":3000", { "secure": true, 'connect timeout': 5000 });
Is this the correct way to do it? I based my https code on examples, so I'm doubting on whether this is well enough (I know it isn't, but should be close). When I run the code, I also get an error no such file or directory '../etc/nginx/ssl/some_file.key'...

Answer 1

I use it this way, although this is very dependent on express version you are using. This is for version 3.4
var express = require('express')
, app = express()
,fs = require('fs')
,events = require('events');
...
var options = {
key: fs.readFileSync('/etc/nginx/ssl/some_file.key'),
cert: fs.readFileSync('/etc/nginx/ssl/some_file.crt')
};
/*
*Configuration
*
*/
var server = require('https').createServer(options, app), io = require("socket.io").listen(server);
var port = 8443;
var ipaddr = '0.0.0.0';
app.configure(function() {
app.set('port', port);
app.set('ipaddr', ipaddr);
app.use(express.bodyParser());
app.use(express.methodOverride());
...
});