执行go run mockserver/main.go命令后报错
PS F:\go\coding-180> go run mockserver/main.go
go: github.com/gin-contrib/sse@v0.1.0: Get “https://proxy.golang.org/github.com/gin-contrib/sse/@v/v0.1.0.mod”: dial tcp 216.58.200.241:443: 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.