add a websocket callback: on_disconnected()

[daboooooo]

I want to reconnect to websocket server, but can't catch the disconnected exception raised by the BinanceSocketManager thread. So add the on_disconnected() callback to solve this problem.

[garbusbeach]

Hey man, this is awesome. I've monkeypatched it similar in my project, but this is solution which I'm looking for

[garbusbeach]

Does anyone maintain this repo? Quite critical issue is resolved here.....

[MFRealG]

I want to reconnect to websocket server, but can't catch the disconnected exception raised by the BinanceSocketManager thread. So add the on_disconnected() callback to solve this problem.

Hi @daboooooo ,
Thanks a lot for your idea.
Why just not to use: self._callback(self.on_error, e) as it already exist instead of creating new event: on_disconnected?
In this case we need to patch: binance_socket_manager.py only.
And also to add self.ws.connected = False when any exception is raised in binance_socket_manager.py?
Later on, we will be able to intercept/catch the Websocket exception and can check status of self.ws.connected like this guy propose: #120

Something like this?

            except WebSocketException as e:
                if isinstance(e, WebSocketConnectionClosedException):
                    self.logger.error("Lost websocket connection")
                else:
                    self.logger.error("Websocket exception: {}".format(e))
                if self.ws.connected:
                    self.ws.send_close()
                self.ws.connected = False
                self._callback(self.on_error, e)
                break
            except Exception as e:
                self.logger.error("Exception in read_data: {}".format(e))
                if self.ws.connected:
                   self.ws.send_close()
                self.ws.connected = False
                self._callback(self.on_error, e)
                break