I am trying to build a small app to learn "web sockets with python using flask" where I am trying to count the number of user who are using the app. For that I was using Matt Makai tutorial. I guess I am messing up in something because the counter is not incrementing.
Here is my HTML:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Sockets</title> </head> <body> <h1>Welcome to sockets</h1> <br> <!--<h2> {{ counter }} visitors have seen this page!</h2>--> <h2><span id="user-count">0</span> visitors have seen this page! </h2> <script type="text/javascript" src="http://code.jquery.com/jquery-1.11.1.min.js"></script> <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/socket.io/1.4.5/socket.io.min.js"></script> <script type="text/javascript"> $(document).ready(function() { var url = "ws://localhost:5001"; var socket = new io.connect(url + "/dd"); socket.on('msg', function(msg) { $("#connected").html(msg.count); }); }); </script> </body> </html> And this is my python code:
from gevent import monkey monkey.patch_all() import redis from flask import Flask, render_template from flask_socketio import SocketIO app = Flask(__name__) db = redis.StrictRedis('localhost', 6379, 0) socketio = SocketIO(app) @app.route('/') def main(): # c = db.incr('counter') return render_template('main.html') @socketio.on('connect', namespace='/sockets') def ws_conn(): c = db.incr('user_count') socketio.emit('msg', {'count': c}, namespace="/sockets") @socketio.on('disconnect', namespace='/sockets') def ws_disconn(): c = db.decr('user_count') socketio.emit('msg', {'count': c}, namespace="/sockets") if __name__ == "__main__": # check only if this file is called directly (not by importing somewhere else) socketio.run(app) 
