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import paho.mqtt.client as mqtt
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import time
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import os
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if not os.path.exists("user.txt"):
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os.system("bash get_user.sh")
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broker = '121.40.129.71'
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port = 48835
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# 回调函数，当客户端收到连接响应时被调用
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def on_connect(client, userdata, flags, rc, properties=None):
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print("连接结果: " + str(rc))
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# 订阅响应主题
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client.subscribe("response/topic")
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# 回调函数，当客户端收到消息时被调用
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def on_message(client, userdata, msg):
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print("收到消息: " + msg.topic + " " + str(msg.payload))
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if msg.payload.decode() == "Set user.txt success!":
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global response_received
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response_received = True
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# 创建客户端实例
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client = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2,)
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# 设置回调函数
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client.on_connect = on_connect
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client.on_message = on_message
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# 连接到MQTT代理
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client.connect(broker, port, 60)
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# 启动一个后台线程来处理网络流量和回调
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client.loop_start()
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with open("user.txt", "r") as f:
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user = f.read().strip()
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# # 发布消息
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# client.publish("request/topic", user, qos=2)
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# 等待响应
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response_received = False
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while not response_received:
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# 发布消息
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client.publish("request/topic", user, qos=2)
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print("等待响应...")
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time.sleep(1)
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# 停止网络循环并断开连接
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client.loop_stop()
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client.disconnect()
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print("收到响应，客户端退出。")
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