Flask

 1 <!DOCTYPE html>
 2 <html lang="en" xmlns="http://www.w3.org/1999/xhtml">
 3 <head>
 4     <meta charset="utf-8" />
 5     <title></title>
 6     <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.2.min.js"></script>
 7     <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/socket.io/1.3.5/socket.io.min.js"></script>
 8 </head>
 9 <body>
10     <h1 id="t"></h1>
11     <script type="text/javascript">
12     $(document).ready(function() {
13         namespace = ‘/test_conn‘;
14         //var socket = io.connect(location.protocol + ‘//‘ + document.domain + ‘:‘ + location.port + namespace, {transports: [‘websocket‘]});
15         var socket = io.connect(‘http://‘ + document.domain + ‘:‘ + location.port + namespace);
16 
17         socket.on(‘server_response‘, function(res) {
18             console.log(res.data);
19             $(‘#t‘).text(res.data);
20         });
21     });
22     </script>
23 </body>
24 </html>

 1 from datetime import datetime
 2 from flask import render_template
 3 from FlaskWebProject1 import app
 4 
 5 @app.route(‘/‘)
 6 @app.route(‘/home‘)
 7 def home():
 8     """Renders the home page."""
 9     return render_template(
10         ‘index.html‘,
11         title=‘Home Page‘,
12         year=datetime.now().year,
13     )
14 
15 @app.route(‘/contact‘)
16 def contact():
17     """Renders the contact page."""
18     return render_template(
19         ‘contact.html‘,
20         title=‘Contact‘,
21         year=datetime.now().year,
22         message=‘Your contact page.‘
23     )
24 
25 @app.route(‘/about‘)
26 def about():
27     """Renders the about page."""
28     return render_template(
29         ‘about.html‘,
30         title=‘About‘,
31         year=datetime.now().year,
32         message=‘Your application description page.‘
33     )
34 
35 @app.route(‘/SocketIO‘)
36 def SocketIO():
37     print("In SocketIO ")
38     return render_template(‘SocketIO.html‘)

 1 from os import environ
 2 from FlaskWebProject1 import app
 3 from flask_socketio import SocketIO,emit
 4 
 5 from threading import Lock
 6 import random
 7 async_mode = None
 8 #app = Flask(__name__)
 9 app.config[‘SECRET_KEY‘] = ‘secret!‘
10 socketio = SocketIO(app)
11 thread = None
12 thread_lock = Lock()
13 
14 @socketio.on(‘connect‘, namespace=‘/test_conn‘)
15 def test_connect():
16     print("In test_connect ")
17     global thread
18     with thread_lock:
19         if thread is None:
20             thread = socketio.start_background_task(target=background_thread)
21 
22 def background_thread():
23     print("In background_thread ")
24     while True:
25         socketio.sleep(1)
26         t = random.randint(1, 100)
27         socketio.emit(‘server_response‘,
28                       {‘data‘: t},namespace=‘/test_conn‘)
29 
30 
31 if __name__ == ‘__main__‘:
32     HOST = environ.get(‘SERVER_HOST‘, ‘0.0.0.0‘)
33     try:
34         PORT = int(environ.get(‘SERVER_PORT‘, ‘5555‘))
35     except ValueError:
36         PORT = 5555
37     #app.run(HOST, PORT)
38     socketio.run(app,HOST, PORT,debug=True)