Minimalistic Python implementation of Ledger Live HID proxy

hidProxy.py

from ledgerblue.comm import getDongle, CommException
import asyncio
import websockets
import json
import binascii

dongle = None

async def hidProxy(websocket, path):
	global dongle
	while True:
		data = await websocket.recv()
		print("Processing " + data)
		response = {}
		if data == "open":		
			response['type'] = "opened"
			await websocket.send(json.dumps(response))
			continue
		if dongle == None:
			dongle = getDongle(True)
		apduResponse = None
		sw = None
		try:
	 		apduResponse = dongle.exchange(binascii.unhexlify(data))
		except CommException as e:
	 		sw = e.sw
		else:
			try:
				dongle.close()
			except:
				pass
			dongle = None
			try:
				dongle = getDongle(True)
				apduResponse = dongle.exchange(binascii.unhexlify(data))
			except:
				pass
		if sw != None:
			response['type'] = "response"
			response['data'] = "%0.4X" % sw
		else:
			if apduResponse != None:
				response['type'] = "response"
				response['data'] = binascii.hexlify(apduResponse).decode('utf-8') + "9000"
			else:
				response['type'] = "error"
				response['data'] = "Failed to exchange APDU"
		await websocket.send(json.dumps(response))

print("Running websocket server")

server = websockets.serve(hidProxy, "localhost", 8435)

asyncio.get_event_loop().run_until_complete(server)
asyncio.get_event_loop().run_forever()