<s> from flask import Flask , render_template <EOL> import engineio <EOL> async_mode = None <EOL> eio = engineio . Server ( async_mode = async_mode ) <EOL> app = Flask ( __name__ ) <EOL> app . wsgi_app = engineio . Middleware ( eio , app . wsgi_app ) <EOL> @ app . route ( '<STR_LIT:/>' ) <EOL> def index ( ) : <EOL> return render_template ( '<STR_LIT>' ) <EOL> @ eio . on ( '<STR_LIT>' ) <EOL> def connect ( sid , environ ) : <EOL> print ( "<STR_LIT>" , sid ) <EOL> @ eio . on ( '<STR_LIT:message>' ) <EOL> def message ( sid , data ) : <EOL> print ( '<STR_LIT>' , sid , data ) <EOL> eio . send ( sid , '<STR_LIT>' , binary = False ) <EOL> @ eio . on ( '<STR_LIT>' ) <EOL> def disconnect ( sid ) : <EOL> print ( '<STR_LIT>' , sid ) <EOL> if __name__ == '<STR_LIT:__main__>' : <EOL> if eio . async_mode == '<STR_LIT>' : <EOL> app . run ( threaded = True ) <EOL> elif eio . async_mode == '<STR_LIT>' : <EOL> import eventlet <EOL> from eventlet import wsgi <EOL> wsgi . server ( eventlet . listen ( ( '<STR_LIT>' , <NUM_LIT> ) ) , app ) <EOL> elif eio . async_mode == '<STR_LIT>' : <EOL> from gevent import pywsgi <EOL> try : <EOL> from geventwebsocket . handler import WebSocketHandler <EOL> websocket = True <EOL> except ImportError : <EOL> websocket = False <EOL> if websocket : <EOL> pywsgi . WSGIServer ( ( '<STR_LIT>' , <NUM_LIT> ) , app , <EOL> handler_class = WebSocketHandler ) . serve_forever ( ) <EOL> else : <EOL> pywsgi . WSGIServer ( ( '<STR_LIT>' , <NUM_LIT> ) , app ) . serve_forever ( ) <EOL> else : <EOL> print ( '<STR_LIT>' + eio . async_mode ) </s>
