在拉取 go 第三方扩展包的时候报错

问题

刚安装GO之后，go build filename时在拉取GO第三方扩展包的时候报错

go: github.com/denisenkom/go-mssqldb@v0.10.0: Get "https://proxy.golang.org/github.com/denisenkom/go-mssqldb/@v/v0.10.0.mod": dial tcp 172.217.24.17:443: 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.

分析

查看GO环境

go env

set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\admin\AppData\Local\go-build
set GOENV=C:\Users\admin\AppData\Roaming\go\env
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Users\admin\go\pkg\mod
set GONOPROXY=
set GOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\admin\go
set GOPRIVATE=
set GOPROXY=https://goproxy.cn,direct
set GOROOT=C:\Program Files\Go
set GOPROXY=https://proxy.golang.org,direct
set GOTMPDIR=
set GOTOOLDIR=C:\Program Files\Go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.16.3
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=C:\Users\admin\Downloads\fscan-main\go.mod
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\CHENCH~1\AppData\Local\Temp\go-build650192608=/tmp/go-build -gno-record-gcc-switches

关闭GOSUMDB

go env -w GOSUMDB=off

代理更改为不需FQ的

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

再次执行build就可以正常拉取了