lot_manager/data_upload.py

import json
import time

import paho.mqtt.client as mqtt

from device import device_name
from tool import *


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
    client.publish('error', payload=device_name, qos=0)
    if device_name != origin_data['device_name']:
        return False
    return True


class DataUploadClient:
    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

    def on_connect(self, client, userdata, flags, rc):
        self.client.publish('success', payload='连接成功，执行数据推送和本地存储' + str(time.time()), qos=0)
        subprocess.Popen(['/usr/bin/bash /home/pi/lot_manager/bash/start_data_upload.sh'], shell=True)

    def on_disconnect(self, client, userdata, rc):
        print("失败，执行本地存储")
        subprocess.Popen(['/usr/bin/bash /home/pi/lot_manager/bash/stop_data_upload.sh'], shell=True)

    def start(self):
        self.client.connect(self.broker, self.port)


if __name__ == '__main__':
    MQTT = DataUploadClient('192.168.1.27', 1883, 'lot_mqtt')
    while True:
        try:
            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)