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想在django后台中加入一个检测用户（电子设备）是否在在线的功能。我想的是1记录设备的ip，然后直接http通讯。2记录设备发送数据的最后一次时间。感觉都不太好，有人能告诉我其他的解决办法吗
业精于勤，荒于嬉;行成于思，毁于随。
You can use Redis, then record the last time the device sent data, set a certain expiration time, and automatically delete it after expiration, so you can directly check who is online
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
You can use Redis, then record the last time the device sent data, set a certain expiration time, and automatically delete it after expiration, so you can directly check who is online