from flask import Flask, render_template, redirect, url_for
from flask_socketio import SocketIO, emit
import json

def load_config():
    # configuration
    return json.load(open('/etc/geekdj/config.json'))

def load_users():
    return json.load(open('logged_in.json'))

config = load_config()

geekdj = Flask(__name__)

geekdj.config["DEBUG"] = config["debug"]
geekdj.config["SECRET_KEY"] = config["secret_key"]
geekdj.config.from_envvar("FLASKR_SETTINGS", silent=True)

socketio = SocketIO(geekdj)

@geekdj.route('/')
def index():
    return render_template('index.html')

# SocketIO functions

@socketio.on('connect')
def chat_connect():
    print ('connected')

@socketio.on('disconnect')
def chat_disconnect():
    print ("Client disconnected")

@socketio.on('broadcast')
def chat_broadcast(message):
    print ("test")
    emit("chat", {'data': message['data']})

if __name__ == "__main__":
    socketio.run(geekdj, port=8000)

<script src="//cdn.socket.io/socket.io-1.4.5.js"></script>
<script type="text/javascript" charset="utf-8">
    $(document).ready(function(){

        // the socket.io documentation recommends sending an explicit package upon connection
        // this is specially important when using the global namespace
        var socket = io.connect('http://localhost:8000');

        socket.on('connection', function(socket) {
            socket.emit('foo', {foo: "bar"});
            socket.join("test");
        });

        socket.on('joined', function(data) {
            console.log('Joined room!');
            console.log(data["room"]);
        });
     });