我有一个记录器来记录所有到达本地代理的 MQTT 消息。这个记录器有多个订阅，其中之一是“警报” - 它还会向用户的手机发送短信（未显示附加代码）。
我的问题（我想这有点新手）-但是有没有办法过滤到达的消息的来源？
from sys import path
path.append('/home/guy/.local/lib/python3.5/site-packages')
import paho.mqtt.client as mqtt
from threading import Thread
import datetime
import os
class LogMQTTactivity(Thread):
def __init__(self, sid=None, mqtt_server="192.168.2.113", username=None, password=None, topics=None, topic_qos=None,
filename='/home/guy/MQTTlogger.log'):
Thread.__init__(self)
self.sid = sid
self.mqtt_server = mqtt_server
self.filename = filename
self.username = username
self.password = password
self.topics = topics
self.topic_qos = topic_qos
self.output2screen = 1
self.client, self.arrived_msg = None, None
self.check_logfile_valid()
self.log_header()
def log_header(self):
text = ' Connect to following topics '
x = 12
self.append_log('*' * x + text + x * "*")
for topic in self.topics:
self.append_log(topic)
self.append_log('*' * 2 * x + len(text) * "*")
def run(self):
self.client = mqtt.Client(str(self.sid))
self.client.on_connect = self.on_connect
self.client.on_message = self.on_message
if self.username is not None and self.password is not None:
self.client.username_pw_set(self.username, self.password)
self.client.connect(self.mqtt_server, 1883, 60)
self.client.loop_forever()
def on_connect(self, client, obj, flags, rc):
self.append_log(">> Connecting to MQTT mqtt_server %s: %d" % (self.mqtt_server, rc))
for topic in self.topics:
self.append_log(">> Subscribe topic: %s" % topic)
self.client.subscribe(topic, qos=self.topic_qos)
def on_message(self, client, obj, msg):
self.arrived_msg = msg.payload.decode()
self.append_log(self.arrived_msg)
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