Express websockets on message get cookie info

Question

I have an express web socket application.

In the onmessage function, I would like to access the cookies of the client that sent the message.

The reason for this is that I'm making a game and I have the user login. I need to check what to name cookie is so that I control the correct player.

This is what I've got so far:

var express = require('express');
var expressWs = require('express-ws');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var app = express();

app.use(cookieParser('secretkey123'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
  extended: true
}))

expressWs = expressWs(app);

app.get('/', function(req, res) {
    // stuff for logging in
})

app.post('/', function(req, res) {
    // stuff for logging in
})

app.get('/logout', function(req, res) {
    res.clearCookie('name');
    res.redirect('/');
    // more stuff for logging in
})

app.ws('/ws', function(ws, req) {
    ws.on('open', function() {
        // how do I check when a connection is opened?
    })
    ws.on('message', function(msg) {
        // who sent the message? how do I get the cookie info to check the user who send it?
    })
    ws.on('close', function() {
        // the've disconnected
    })
})

var server = app.listen(8000, function () {
   var host = server.address().address
   var port = server.address().port
})

Is this possible?

Also, where do I check when a websocket connection is opened?

I tried the 'open' event but it doesn't seem to be working.

Thanks for the help in advance!

Answer 1

I figured out how to do it!

I forgot that the req argument can be accessed inside the other functions.

This means in the on message function you can just do this:

ws.on('message', function(msg) {
    req.cookies.username //do stuff
});

The connection open code can be done before you setup any of the events:

app.ws('/ws', function(ws, req) {
    // connection open code here
    ws.on('message', function(msg) {
        // connection message code here
    })
})