#鸿蒙通关秘籍#如何获取指定socket实时上行流量数据？

这个功能用的人还是挺少的

javascript
```javascript
import { statistics, socket } from '@kit.NetworkKit';
import { BusinessError } from '@kit.BasicServicesKit';

let tcp: `socket.TCPSocket` = `socket.constructTCPSocketInstance()`;<br>
`tcp.getSocketFd()`.then((`sockfd`: number) => { 
    `statistics.getSockfdTxBytes(sockfd)`.then((`stats`: number) => { 
        console.log(JSON.stringify(`stats`)); 
    }).catch((`err`: BusinessError) => { 
        console.error(JSON.stringify(`err`)); 
    }); 
});