from enum import IntEnum import json from json import JSONDecodeError from random import randint import sys import asyncio from random import randint from websockets import connect from os import environ from argparse import ArgumentParser IPADDR = '127.0.0.1' PORT = '30000' TOKEN = 'HELLO' UUID = 'magic' URL = f'ws://{IPADDR}:{PORT}/api?token={TOKEN}&uuid={UUID}' class AFBT(IntEnum): REQUEST = 2, RESPONSE = 3, ERROR = 4, EVENT = 5 msgq = {} def addrequest(msgid, msg): msgq[msgid] = {'request': msg, 'response': None} def addresponse(msgid, msg): if msgid in msgq.keys(): msgq[msgid]['response'] = msg class AGLBaseService: api = None url = None ip = None port = None token = None uuid = None def __init__(self, api, ip, port, url=None, token='HELLO', uuid='magic'): self.api = api self.url = url self.ip = ip self.port = port self.token = token self.uuid = uuid def __await__(self): return self._async_init().__await__() async def __aenter__(self): return self._async_init() async def _async_init(self): # setting ping_interval to None because AFB does not support websocket ping # if set to !None, the library will close the socket after the default timeout URL = f'ws://{self.ip}:{self.port}/api?token={self.token}&uuid={self.uuid}' self._conn = connect(close_timeout=0, uri=URL, subprotocols=['x-afb-ws-json1'], ping_interval=None) self.websocket = await self._conn.__aenter__() return self async def __aexit__(self, *args, **kwargs): await self._conn.__aexit__(*args, **kwargs) async def close(self): await self._conn.__aexit__(*sys.exc_info()) async def send(self, message): await self.websocket.send(message) async def receive(self): return await self.websocket.recv() async def listener(self): try: while True: msg = await self.receive() print(f"Received {msg}") try: data = json.loads(msg) if isinstance(data, list): if data[0] == AFBT.RESPONSE and str.isnumeric(data[1]): msgid = int(data[1]) if msgid in msgq: addresponse(msgid, data) except JSONDecodeError: print("Not decoding a non-json message") except KeyboardInterrupt: print("Received keyboard interrupt, exiting") except asyncio.CancelledError: print("Websocket listener coroutine stopped") async def subscribe(self, event): msgid = randint(0, 999999) msg = f'["{AFBT.REQUEST}","{msgid}","{self.api}/subscribe",{{"value": "{event}"}}]' await self.send(msg) async def unsubscribe(self, event): verb = 'unsubscribe' msgid = randint(0, 999999) msg = f'[2,"{msgid}","{self.api}/{verb}",{{"value": "{event}"}}]' addrequest(msgid, msg) await self.send(msg)