请问在node-red怎样处理http request返回数据？

hunl1986

我的流程是这样的

http request执行后返回数值

{"Message":"","Data":[{"DeviceId":"826e7238c021424c9c74c890ab5c5446","DeviceStatus":"[0,0,1,0,0,0,42.000,32,8,0,0,0,32,0,17,31,0,0,80,38,0,0,0,0,32,18,0,16,12,1,0,0,0,0,0,0]","OnlineStatus":true}],"Code":200}

复制代码

我想要获取 中第二个“0”，请问在“数据处理”里的代码怎么样写呢？

hunl1986

let jsonData = msg.payload;
let deviceStatus = JSON.parse(jsonData.Data[0].DeviceStatus); // 将DeviceStatus从字符串转换为数组
let secondZero = deviceStatus[1]; // 获取数组中第二个元素的值
msg.payload = secondZero;
return msg;

自己解决，本来想一行解决，错误了，分开写就好写了

hejie127

response = '{"Message":"","Data":[{"DeviceId":"826e7238c021424c9c74c890ab5c5446","DeviceStatus":"[0,0,1,0,0,0,42.000,32,8,0,0,0,32,0,17,31,0,0,80,38,0,0,0,0,32,18,0,16,12,1,0,0,0,0,0,0]","OnlineStatus":true}],"Code":200}'

# 解析JSON数据
data = json.loads(response)
# 获取第一个设备的状态信息
device_status = data["Data"][0]["DeviceStatus"]
# 将状态信息转化为列表
status_list = json.loads(device_status)
# 获取第二个数值
second_value = status_list[1]
print(second_value)