lot_manager/MQTT.py

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Python
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import json
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import time
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import paho.mqtt.client as mqtt
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from device import device_name
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from tool import *
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def valid(msg, client):
origin_data = json.loads(msg.payload.decode('utf-8'))
if 'msg' not in origin_data:
client.publish('error', payload='msg must be supplied', qos=0)
return False
if 'device_name' not in origin_data:
client.publish('error', payload='device_name must be supplied', qos=0)
return False
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client.publish('error', payload=device_name, qos=0)
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if device_name != origin_data['device_name']:
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return False
return True
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class MQTTClient:
def __init__(self, broker, port, topic):
self.broker = broker
self.port = port
self.topic = topic
self.client = mqtt.Client()
self.client.on_connect = self.on_connect
self.client.on_disconnect = self.on_disconnect
self.client.on_message = self.on_message
def on_connect(self, client, userdata, flags, rc):
print("Connected with result code " + str(rc))
self.client.subscribe(self.topic)
client.publish('success', payload='成功订阅lot_mqtt' + str(time.time()), qos=0)
def on_disconnect(self, client, userdata, rc):
print("Disconnected with code " + str(rc))
def on_message(self, client, userdata, msg):
if not valid(msg, client):
client.publish('error', payload='验证失败', qos=0)
return
client.publish('success', payload='验证通过', qos=0)
try:
origin_data = json.loads(msg.payload.decode('utf-8'))
data = origin_data["msg"]
if data == "push_stream":
# 启动推流视频
push_stream(client)
elif data == "close_stream":
# 关闭推流视频
close_stream(client)
elif data == "exec":
# 执行命令
exec_sh(msg, client)
elif data == "update":
# git更新项目和配置文件
update(client)
elif data == "record_list":
# 查看录像列表
get_list_record()
elif data == "record":
# 获取录像
get_record(msg, client)
elif data == "status":
# 查看运行状态
get_status(client)
else:
# 错误类型
client.publish('error', payload='No Such Type', qos=0)
except Exception as e:
pass
def start(self):
self.client.connect(self.broker, self.port)
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if __name__ == '__main__':
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MQTT = MQTTClient('192.168.1.27', 1883, 'lot_mqtt')
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while True:
try:
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MQTT.start()
if MQTT.client.is_connected():
print("连接成功")
MQTT.client.loop_forever()
except:
print("重新连接")
time.sleep(1)