go get: module github.com/gin-gonic/gin 报错： A connection attempt failed

报错：

go get: module github.com/gin-gonic/gin: Get "https://proxy.golang.org/github.com/gin-gonic/gin/@v/list": dial tcp 172.217.160.81:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

原因：

墙

解决方法：

设置国内代理

go env -w GOPROXY=https://goproxy.cn