How to implement socket.io authentication with bearer token in nodejs

How validate the incoming connections , how create private namespaces , before emitting any event to client how to validate the client role every socket

you can set "authorization" to your socket connection .The client sends the auth token through the handshake data's query parameter.Which I then validate using the socketAuth method. Have a look at the code sample below and let me know if it helps

/**
 * Check authorization Here
 */
ioSocket.set('authorization', function (handshakeData, callback) {
    console.log("Inside Auth Handshake");
    console.log(handshakeData._query);

    if (handshakeData._query && handshakeData._query.token) {
        var token = handshakeData._query.token;
        socketAuth(token, function (err, res) {
            if (err) {
                console.log(err);
                console.log("** Socket Authentication Done :" + false);
                return callback(null, false);
            } else {
                console.log(" *** Socket Authentication Done :" + res);
                return callback(null, res);
            }
        });
    } else {
        console.log("*Socket Authentication connection: false , Done :" + false);
        return callback(null, false);
    }

});

socketAuth = function (token, callback) {
    verifyToken(token, function (err, res) {  // method to get the user of this token from the DB and validate the connection.
        if (err) {
            return callback(true, false);
        } else {
            return callback(null, res);
        }
    });
}

A client side example of how to connect to socket with a auth token.

var socket = require('socket.io-client')('<SERVER IP>/?token=9a05f8279436549875d1c2cd');

socket.on('connect', function () { console.log("socket connected"); });
socket.emit('event_name',{"message":"hello"});