express, socket.io server for browser client and node.js client

I am trying to set-up an express server with socket.io that will allow node.js clients and browser clients to connect. The browser connects with no problem. The node.js client using socket.io-client give an error: unhandled socket.io url

Server:

var express = require('express'),
    io = require('socket.io');

var app = express();
var host = 'localhost';
var port = process.env.PORT || 8080;

var server = app.listen(port, function() {
    console.log('Gulp is starting my app on PORT: ' + port)
});
io = io.listen(server);

app.use('/', express.static(__dirname + '/'));

io.on("connection", function(socket) {

    socket.on('clientMessage', function(jsonData, from) {
        socket.emit('serverMessage', 'Got a message!');
        console.log('Data being sent from', from, 'is:\n' + jsonData);
    });
});

Client:

var io = require('socket.io-client')

var socket = io.connect('http://192.168.1.222:8080', {reconnect: true});

socket.emit('clientMessage', 'Hello', 'Pi-Voyager');

Copyright Notice：Content Author:「CiscoKidx」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/31713620/express-socket-io-server-for-browser-client-and-node-js-client