pythonasyncioeventletgeventlong-pollinglow-latencysocket-iosocketiosocketio-serverweb-serverwebsocket
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51 lines
1.6 KiB
51 lines
1.6 KiB
# set async_mode to 'threading', 'eventlet', 'gevent' or 'gevent_uwsgi' to
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# force a mode else, the best mode is selected automatically from what's
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# installed
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async_mode = None
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from flask import Flask, render_template
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import socketio
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sio = socketio.Server(async_mode=async_mode)
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app = Flask(__name__)
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app.wsgi_app = socketio.WSGIApp(sio, app.wsgi_app)
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@app.route('/')
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def index():
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return render_template('latency.html')
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@sio.event
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def ping_from_client(sid):
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sio.emit('pong_from_server', room=sid)
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if __name__ == '__main__':
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if sio.async_mode == 'threading':
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# deploy with Werkzeug
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app.run(threaded=True)
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elif sio.async_mode == 'eventlet':
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# deploy with eventlet
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import eventlet
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import eventlet.wsgi
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eventlet.wsgi.server(eventlet.listen(('', 5000)), app)
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elif sio.async_mode == 'gevent':
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# deploy with gevent
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from gevent import pywsgi
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try:
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from geventwebsocket.handler import WebSocketHandler
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websocket = True
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except ImportError:
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websocket = False
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if websocket:
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pywsgi.WSGIServer(('', 5000), app,
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handler_class=WebSocketHandler).serve_forever()
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else:
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pywsgi.WSGIServer(('', 5000), app).serve_forever()
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elif sio.async_mode == 'gevent_uwsgi':
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print('Start the application through the uwsgi server. Example:')
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print('uwsgi --http :5000 --gevent 1000 --http-websockets --master '
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'--wsgi-file latency.py --callable app')
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else:
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print('Unknown async_mode: ' + sio.async_mode)
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