# 使用curl測試連接某網站的速度

curl指令本身有測速功能,搭配shell可以作為測速使用

```
curl -o /dev/null -s -w "%{time_namelookup},%{time_connect}, \
%{time_starttransfer},%{time_total}" \
https://tw.yahoo.com && echo

#------------產生數字--------------------
0.004188,0.060702, 1.931382,8.039616
```

0.004188 => DNS解析速度

0.060702 =>Client -> Sever(TCP request)

1.931382 => Server->Client(TCP Response)

8.039616 => 連線總共花費時間

了解規則後，就可以寫一個簡單的連線某網站的測速程式工具

### $1表示第一個參數，使用到條件式 if.... else.... fi

vi curlweb-speed.sh

```bash
#!/bin/bash
if [ $1 ]; then
 url=$1
else
 echo "請輸入url(exp:tw.yahoo.com)"
 read url 
fi
curl -o /dev/null -s -w \
"DNS 解析: %{time_namelookup}\n\
Client Request: %{time_connect}\n\
Server Respon: %{time_starttransfer}\n\
總花費時間: %{time_total}\n" \
"${url}"
```

![](https://529150212-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Lh81JtaIQ84bwQqz_Wh%2F-LwWDwKp4fLWGlgBSGMs%2F-LwX3TlYocRx0KkxyqIK%2Fimage.png?alt=media\&token=22201b26-fa4d-4eeb-8a8a-74985bd19f65)


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