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import os.path
import paho.mqtt.client as mqtt
import ssl
import logging
from typing import Tuple
from ..config import config
def username_and_password() -> Tuple[str, str]:
username = config['mqtt']['username'] if 'username' in config['mqtt'] else None
password = config['mqtt']['password'] if 'password' in config['mqtt'] else None
return username, password
class MQTTBase:
def __init__(self, clean_session=True):
self._client = mqtt.Client(client_id=config['mqtt']['client_id'],
protocol=mqtt.MQTTv311,
clean_session=clean_session)
self._client.on_connect = self.on_connect
self._client.on_disconnect = self.on_disconnect
self._client.on_message = self.on_message
self._client.on_log = self.on_log
self._client.on_publish = self.on_publish
self._loop_started = False
self._logger = logging.getLogger(self.__class__.__name__)
username, password = username_and_password()
if username and password:
self._logger.debug(f'username={username} password={password}')
self._client.username_pw_set(username, password)
def configure_tls(self):
ca_certs = os.path.realpath(os.path.join(
os.path.dirname(os.path.realpath(__file__)),
'..',
'..',
'..',
'assets',
'mqtt_ca.crt'
))
self._client.tls_set(ca_certs=ca_certs, cert_reqs=ssl.CERT_REQUIRED, tls_version=ssl.PROTOCOL_TLSv1_2)
def connect_and_loop(self, loop_forever=True):
host = config['mqtt']['host']
port = config['mqtt']['port']
self._client.connect(host, port, 60)
if loop_forever:
self._client.loop_forever()
else:
self._client.loop_start()
self._loop_started = True
def disconnect(self):
self._client.disconnect()
self._client.loop_write()
self._client.loop_stop()
def on_connect(self, client: mqtt.Client, userdata, flags, rc):
self._logger.info("Connected with result code " + str(rc))
def on_disconnect(self, client: mqtt.Client, userdata, rc):
self._logger.info("Disconnected with result code " + str(rc))
def on_log(self, client: mqtt.Client, userdata, level, buf):
level = mqtt.LOGGING_LEVEL[level] if level in mqtt.LOGGING_LEVEL else logging.INFO
self._logger.log(level, f'MQTT: {buf}')
def on_message(self, client: mqtt.Client, userdata, msg):
self._logger.debug(msg.topic + ": " + str(msg.payload))
def on_publish(self, client: mqtt.Client, userdata, mid):
self._logger.debug(f'publish done, mid={mid}')
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