Using Websocket with Passport

Question

How do I access the passport login for the current session when someone opens a WebSocket connection?

I've found a nice project express-ws which seems to work beautifully

app.ws('/', function(ws, req) {
    ws.on('message', function(msg) {
        console.log('express-ws --- ', msg);
    });
    console.log('socket', req.user); //current user == req.user
});

But how would I go about getting this same information with a plain Websocket connection?

var WebSocketServer = require('ws').Server,
    wss = new WebSocketServer({ port: 3001 });

wss.on('connection', function(socket){
    //Where is the current user????
    console.log('connection');

    socket.on('message', function(message){
        console.log('message received', message);
    });
});

(this second connection does work just fine - but I can't for the life of me find any way to get the logged in info from Passport)

Answer 1

When you're creating your WS server, add a "verifyClient" parameter as follows to grab the session information:

  const wss = new (require('ws').Server)({
    server,
    verifyClient: (info, done) => {
      sessionParser(info.req, {}, () => {
        done(info.req.session)
      })
    }
  })

Where sessionParser is your express-session configured object. This then allows you to access it within the websocket via req.session. If you're using passport, you might want req.session.passport.user..