flask-socketio (demo)

from flask import Flask, render_template
from flask_session import Session
from flask_socketio import SocketIO, emit,send
import datetime
import time
import json
app = Flask(__name__)
Session(app)
socketio = SocketIO(app, manage_session=False)

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

@app.route('/session', methods=['GET', 'POST'])
def session_access():
    pass

@socketio.on('get-session')
def get_session():
    pass

@socketio.on('set-session')
def set_session(data):
    pass

@socketio.on('my event')
def handle_message(message):
    print('received message: ' + str(message))

    while True:
        current_date = str(datetime.datetime.now())
        dic = {'current_date': current_date}
        res_json = json.dumps(dic)
        time.sleep(1)
        emit('server_response',res_json)



if __name__ == '__main__':
    socketio.run(app)

manage.py

<html>
    <head>
        <link rel="stylesheet" href="https://unpkg.com/purecss@1.0.0/build/pure-min.css">
        <meta name="viewport" content="width=device-width, initial-scale=1">
    </head>
    <body>
        <div id="current_time">
        </div>
        <script type="text/javascript" src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
        <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/socket.io/1.3.6/socket.io.min.js"></script>
        <script type="text/javascript" charset="utf-8">
            var socket = io.connect('http://' + document.domain + ':' + location.port);
            socket.on('connect', function() {
                socket.emit('my event', {data: '建立连接成功!'});
                socket.on('server_response',function (data) {
                    $('#current_time').text(data);
                })
            });

        </script>
    </body>
</html>

index.html

import datetime
import json
from flask_socketio import Namespace, emit,SocketIO,disconnect
from flask import Flask, render_template
app = Flask(__name__)
socketio = SocketIO(app)

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

class MyCustomNamespace(Namespace):
    def on_connect(self):
        print('建立连接成功！')


    def on_disconnect(self):
        print('客户端断开连接！')
        

    def on_my_event(self,data):
        print(data)
        current_date = str(datetime.datetime.now())
        dic = {'current_date': current_date}
        res_json = json.dumps(dic)
        emit('server_response', res_json)


socketio.on_namespace(MyCustomNamespace('/test'))

if __name__ == '__main__':
    socketio.run(app)

manage.py(基于Namespace)