server2.py

import socketio
import eventlet
from flask import Flask, render_template

sio = socketio.Server()
app = Flask(__name__)


@app.route('/')
def index():
    """Serve the client-side application."""
    return render_template('index.html')


@sio.on('connect')
def connect(sid, environ):
    print('connect ', sid)


@sio.on('test')
def message(sid, data):
    print('looking at test ', data)


@sio.on('disconnect')
def disconnect(sid):
    print('disconnect ', sid)

if __name__ == '__main__':
    # wrap Flask application with socketio's middleware
    app = socketio.Middleware(sio, app)

    # deploy as an eventlet WSGI server
    eventlet.wsgi.server(eventlet.listen(('', 3000)), app)