实时数据传输：Django 与 MQTT 的完美结合

import paho.mqtt.client as mqtt
from django.conf import settings
from django.core.management.base import BaseCommand
from .models import Data
 
class Command(BaseCommand):
    help = 'MQTT client to receive real-time data'
 
    def handle(self, *args, **kwargs):
        def on_connect(client, userdata, flags, rc):
            if rc == 0:
                print("Connected to MQTT Broker...")
                client.subscribe(settings.MQTT['TOPIC'])
            else:
                print("Failed to connect, return code %d\n", rc)
 
        def on_message(client, userdata, message):
            print("Received message: ", str(message.payload.decode('utf-8')))
            data = Data(payload=message.payload.decode('utf-8'))
            data.save()
 
        client = mqtt.Client()
        client.on_connect = on_connect
        client.on_message = on_message
 
        client.connect(settings.MQTT['BROKER_URL'], settings.MQTT['PORT'], 60)
        client.loop_forever()

这段代码使用了Django的命令行工具来启动MQTT客户端，并且在接收到消息时将数据保存到数据库。这里的settings.MQTT是指在Django的settings.py文件中定义的MQTT配置字典。这样的实现方式使得开发者可以很容易地将MQTT集成到Django项目中，并处理实时数据。