Server: subprotocols = None is not iterable

[mooomooo]

simple-websocket/src/simple_websocket/ws.py

Line 291 in 271f8fc

self.subprotocols = subprotocols

I've encountered a TypeError: argument of type 'NoneType' is not iterable because of this. I assume you probably want to do something similar to what you do in the Client:

simple-websocket/src/simple_websocket/ws.py

Line 392 in 271f8fc

self.subprotocols = subprotocols or []

(for completeness, this is happening through flask-socketio; full trace is:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/flask/app.py", line 2548, in __call__ 
    return self.wsgi_app(environ, start_response)
  File "/usr/local/lib/python3.10/site-packages/flask_socketio/__init__.py", line 43, in __call__
    return super(_SocketIOMiddleware, self).__call__(environ,
  File "/usr/local/lib/python3.10/site-packages/engineio/middleware.py", line 63, in __call__
    return self.engineio_app.handle_request(environ, start_response)
  File "/usr/local/lib/python3.10/site-packages/socketio/server.py", line 604, in handle_request 
    return self.eio.handle_request(environ, start_response)
  File "/usr/local/lib/python3.10/site-packages/engineio/server.py", line 411, in handle_request 
    packets = socket.handle_get_request(
  File "/usr/local/lib/python3.10/site-packages/engineio/socket.py", line 103, in handle_get_request
    return getattr(self, '_upgrade_' + transport)(environ,
  File "/usr/local/lib/python3.10/site-packages/engineio/socket.py", line 158, in _upgrade_websocket
    return ws(environ, start_response)
  File "/usr/local/lib/python3.10/site-packages/engineio/async_drivers/threading.py", line 22, in __call__
    self.ws = Server(environ)
  File "/usr/local/lib/python3.10/site-packages/simple_websocket/ws.py", line 321, in __init__
    super().__init__(sock, connection_type=ConnectionType.SERVER,
  File "/usr/local/lib/python3.10/site-packages/simple_websocket/ws.py", line 71, in __init__
    self.handshake()
  File "/usr/local/lib/python3.10/site-packages/simple_websocket/ws.py", line 336, in handshake 
    self.connected = self._handle_events()
  File "/usr/local/lib/python3.10/site-packages/simple_websocket/ws.py", line 183, in _handle_events 
    self.subprotocol = self.choose_subprotocol(event)
  File "/usr/local/lib/python3.10/site-packages/simple_websocket/ws.py", line 340, in choose_subprotocol
    if subprotocol in self.subprotocols:
TypeError: argument of type 'NoneType' is not iterable

)

[miguelgrinberg]

Thanks, this should now be fixed.