ubuntu21.10go 1.17.6: 配置go mod及proxy

一，查看go的环境变量:

root@lhdpcg:/data/goapp/hello# go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/root/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/soft/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/soft/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.17.6"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/data/goapp/hello/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build1471273906=/tmp/go-build -gno-record-gcc-switches”

说明：可以看到GO111MODULE值为空,

GOPROXY的值为"https://proxy.golang.org,direct”

说明：刘宏缔的go森林是一个专注golang的博客，
          地址：https://blog.csdn.net/weixin_43881017

说明：作者:刘宏缔 邮箱: [email protected]

二，配置go环境变量:

1,创建gopath目录:

root@lhdpcg:/data/goapp/hello# mkdir /data/gopath
root@lhdpcg:/data/goapp/hello# chmod 777 /data/gopath

2,配置环境变量

root@lhdpcg:/data/goapp/hello# vi /etc/profile

增加三行:

​export GOPATH=/data/gopath
export GO111MODULE=on
export GOPROXY=https://goproxy.cn

2,使生效:

root@lhdpcg:/data/goapp/hello# source /etc/profile

3,查看效果:

root@lhdpcg:/data/goapp/hello# go env
GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/data/gopath/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/data/gopath"
GOPRIVATE=""
GOPROXY="https://goproxy.cn"
GOROOT="/usr/local/soft/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/soft/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.17.6"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/data/goapp/hello/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build617739190=/tmp/go-build -gno-record-gcc-switches"

三，测试效果

1，下载gin库:

​root@lhdpcg:/data/goapp/hello# go get github.com/gin-gonic/gin
go: downloading github.com/gin-gonic/gin v1.7.7
go: downloading github.com/gin-contrib/sse v0.1.0
go: downloading github.com/mattn/go-isatty v0.0.12
go: downloading github.com/go-playground/validator/v10 v10.4.1
go: downloading github.com/golang/protobuf v1.3.3
go: downloading github.com/ugorji/go/codec v1.1.7
go: downloading gopkg.in/yaml.v2 v2.2.8
go: downloading github.com/json-iterator/go v1.1.9
go: downloading github.com/ugorji/go v1.1.7
go: downloading golang.org/x/sys v0.0.0-20200116001909-b77594299b42
go: downloading github.com/go-playground/universal-translator v0.17.0
go: downloading github.com/leodido/go-urn v1.2.0
go: downloading golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
go: downloading github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421
go: downloading github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742
go: downloading github.com/go-playground/locales v0.13.0
go get: added github.com/gin-contrib/sse v0.1.0
go get: added github.com/gin-gonic/gin v1.7.7
go get: added github.com/go-playground/locales v0.13.0
go get: added github.com/go-playground/universal-translator v0.17.0
go get: added github.com/go-playground/validator/v10 v10.4.1
go get: added github.com/golang/protobuf v1.3.3
go get: added github.com/json-iterator/go v1.1.9
go get: added github.com/leodido/go-urn v1.2.0
go get: added github.com/mattn/go-isatty v0.0.12
go get: added github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421
go get: added github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742
go get: added github.com/ugorji/go/codec v1.1.7
go get: added golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
go get: added golang.org/x/sys v0.0.0-20200116001909-b77594299b42
go get: added gopkg.in/yaml.v2 v2.2.8

2，查看gin库是否下载到了gopath路径

​root@lhdpcg:/data/goapp/hello# ls /data/gopath/pkg/mod/github.com/gin-gonic/
[email protected]

3,编写代码:

hello.go

​package main

import (
    "github.com/gin-gonic/gin"
)

func main() {

    // 声明一个默认路由
    r := gin.Default()

    r.GET("/book", func(c *gin.Context) {
        c.JSON(200, gin.H{
            "message": "GET",
        })
    })

    r.POST("/book", func(c *gin.Context) {
        c.JSON(200, gin.H{
            "message": "POST",
        })
    })

    r.Run(":8080")
}

4,编译:

root@lhdpcg:/data/goapp/hello# go build

运行:

​root@lhdpcg:/data/goapp/hello# ./hello
[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
- using env:   export GIN_MODE=release
- using code:  gin.SetMode(gin.ReleaseMode)
[GIN-debug] GET    /book                     --> main.main.func1 (3 handlers)
[GIN-debug] POST   /book                     --> main.main.func2 (3 handlers)
[GIN-debug] [WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.
Please check gin package - github.com/gin-gonic/gin - pkg.go.dev for details.
[GIN-debug] Listening and serving HTTP on :8080

访问：

http://192.168.219.8:8080/book

返回:

四，查看go的版本:

root@lhdpcg:/data/goapp/hello# go version
go version go1.17.6 linux/amd64