pythonasyncioeventletgeventlong-pollinglow-latencysocket-iosocketiosocketio-serverweb-serverwebsocket
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110 lines
3.1 KiB
110 lines
3.1 KiB
# set this to 'threading', 'eventlet', or 'gevent'
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async_mode = 'threading'
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if async_mode == 'eventlet':
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import eventlet
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eventlet.monkey_patch()
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elif async_mode == 'gevent':
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from gevent import monkey
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monkey.patch_all()
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import time
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from threading import Thread
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from flask import Flask, render_template
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import socketio
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sio = socketio.Server(logger=True, async_mode=async_mode)
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app = Flask(__name__)
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app.wsgi_app = socketio.Middleware(sio, app.wsgi_app)
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app.config['SECRET_KEY'] = 'secret!'
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thread = None
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def background_thread():
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"""Example of how to send server generated events to clients."""
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count = 0
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while True:
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time.sleep(10)
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count += 1
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sio.emit('my response', {'data': 'Server generated event'},
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namespace='/test')
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@app.route('/')
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def index():
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global thread
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if thread is None:
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thread = Thread(target=background_thread)
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thread.start()
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return render_template('index.html')
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@sio.on('my event', namespace='/test')
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def test_message(sid, message):
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sio.emit('my response', {'data': message['data']}, room=sid,
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namespace='/test')
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@sio.on('my broadcast event', namespace='/test')
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def test_broadcast_message(sid, message):
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sio.emit('my response', {'data': message['data']}, namespace='/test')
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@sio.on('join', namespace='/test')
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def join(sid, message):
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sio.enter_room(sid, message['room'], namespace='/test')
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sio.emit('my response', {'data': 'Entered room: ' + message['room']},
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room=sid, namespace='/test')
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@sio.on('leave', namespace='/test')
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def leave(sid, message):
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sio.leave_room(sid, message['room'], namespace='/test')
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sio.emit('my response', {'data': 'Left room: ' + message['room']},
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room=sid, namespace='/test')
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@sio.on('close room', namespace='/test')
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def close(sid, message):
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sio.emit('my response',
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{'data': 'Room ' + message['room'] + ' is closing.'},
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room=message['room'], namespace='/test')
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sio.close_room(message['room'], namespace='/test')
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@sio.on('my room event', namespace='/test')
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def send_room_message(sid, message):
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sio.emit('my response', {'data': message['data']}, room=message['room'],
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namespace='/test')
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@sio.on('disconnect request', namespace='/test')
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def disconnect_request(sid):
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sio.disconnect(sid, namespace='/test')
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@sio.on('connect', namespace='/test')
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def test_connect(sid, environ):
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sio.emit('my response', {'data': 'Connected', 'count': 0}, room=sid,
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namespace='/test')
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@sio.on('disconnect', namespace='/test')
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def test_disconnect(sid):
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print('Client disconnected')
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if __name__ == '__main__':
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if async_mode == 'threading':
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# deploy with Werkzeug
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app.run(threaded=True)
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elif async_mode == 'eventlet':
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# deploy with eventlet
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import eventlet
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eventlet.wsgi.server(eventlet.listen(('', 5000)), app)
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elif async_mode == 'gevent':
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# deploy with gevent
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from gevent import pywsgi
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pywsgi.WSGIServer(('', 5000), app).serve_forever()
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else:
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print('Unknown async_mode: ' + async_mode)
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