Proxyman是一款直观易用的 HTTP 调试工具，拥有出色的 UI 和交互设计， 性能强劲资源占用低。自动生成证书，轻松在 Mac 端启用 SSL 代理抓包，并且集成移动设备的调试。
由于localhost相关的请求报文将不会经过实际的网络适配器，需要特殊配置才能抓包localhost。
参看grpc的数据包监控
解决方案1：使用localhost.proxyman.io
Proxyman uses Cloudflare and sets the DNS of localhost.proxyman.io to 127.0.0.1 (localhost). As a result, Proxyman can capture the local traffic as usual
| 旧URL | 新URL |
|---|---|
| localhost:3000 | localhost.proxyman.io:3000 |
| localhost:8080 | localhost.proxyman.io:8080 |
解决方案2:修改Host文件
Open etc/hosts file
$ sudo vim /etc/hosts
Add Domain Name with both IPv4 and IPv6 (You can change the proxyman.local with your name)
127.0.0.1 proxyman.local
::1 proxyman.local
Make sure you add both IPv4 (127.0.0.1 proxyman.local) and IPv6 (::1 proxyman.local).
Otherwise, you might encounter the 5 seconds DNS delay.
Read more at https://superuser.com/a/1596341
参考：
https://docs.proxyman.io/troubleshooting/couldnt-see-any-request-from-localhost-server
