【golang】从零开始实现加密数据推拉项目-优快云博客

本文链接：https://blog.youkuaiyun.com/lcadna/article/details/144265305

通过此文可初步掌握cobra，viper，docker，对称秘钥非对称秘钥的的使用，实现第一个简单的golang项目。

第一步项目初始化，配置cobra

要在Go中使用go mod从零开始创建一个新项目，你可以按照以下步骤操作：

创建项目目录: 你已经创建了名为 data-provider 的目录，接下来进入该目录。
```
mkdir data-provider
cd data-provider/
```
初始化新的Go模块: 在项目目录中，运行 go mod init 命令来初始化一个新的模块。你需要为你的模块指定一个唯一的名称，这通常是你的域名的反向表示，以确保唯一性。
```
go mod init github.com/yourusername/data-provider
```
将 github.com/yourusername/data-provider 替换为你的实际用户名和项目路径

3.若使用wsl把代理ip变为主机ipconfig显示ip

4.go get 和go install的区别

root@LAPTOP-LU4HDAFV:~/data-provider# go get -u github.com/spf13/cobra/cobra
go: downloading github.com/spf13/cobra v1.8.1
go: module github.com/spf13/cobra@upgrade found (v1.8.1), but does not contain package github.com/spf13/cobra/cobra

go install github.com/spf13/cobra-cli@latest

验证安装

cobra创建main.go函数

root@LAPTOP-LU4HDAFV:~/data-provider# cobra-cli  init  ./
Your Cobra application is ready at
/root/data-provider/./
root@LAPTOP-LU4HDAFV:~/data-provider#

生成main.go和root.go

测试

修改main函数和root.go使得出现错误时打印错误后退出

第二步生成server.go 和version.go

添加 server 命令:
```
cobra-cli add server
```
这将创建一个新的 server.go 文件，并在 root.go 中注册这个命令。
添加 version 命令:
```
cobra-cli add version
```
这将创建一个 version.go 文件，并在 root.go 中注册这个命令。
此时代码结构

data-provider/
├── cmd/
│   ├── root.go
│   ├── server.go
│   └── version.go
├── go.mod
└── go.sum

4.创建使用测试

root@LAPTOP-LU4HDAFV:~/data-provider# go build -o data-provider
root@LAPTOP-LU4HDAFV:~/data-provider# ./data-provider 
Usage:
   [command]

Available Commands:
  completion  Generate the autocompletion script for the specified shell
  help        Help about any command
  server      A brief description of your command
  version     A brief description of your command

Flags:
  -h, --help   help for this command

Use " [command] --help" for more information about a command.
root@LAPTOP-LU4HDAFV:~/data-provider# ./data-provider server
server called
root@LAPTOP-LU4HDAFV:~/data-provider# ./data-provider version
version called
root@LAPTOP-LU4HDAFV:~/data-provider#

5.自动生成的server.go

/*
Copyright © 2024 NAME HERE <EMAIL ADDRESS>

*/
package cmd

import (
	"fmt"

	"github.com/spf13/cobra"
)

// serverCmd represents the server command
var serverCmd = &cobra.Command{
	Use:   "server",
	Short: "A brief description of your command",
	Long: `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:

Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
	Run: func(cmd *cobra.Command, args []string) {
		fmt.Println("server called")
	},
}

func init() {
	rootCmd.AddCommand(serverCmd)

	// Here you will define your flags and configuration settings.

	// Cobra supports Persistent Flags which will work for this command
	// and all subcommands, e.g.:
	// serverCmd.PersistentFlags().String("foo", "", "A help for foo")

	// Cobra supports local flags which will only run when this command
	// is called directly, e.g.:
	// serverCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
}

6.自动生成的version.go

/*
Copyright © 2024 NAME HERE <EMAIL ADDRESS>

*/
package cmd

import (
	"fmt"

	"github.com/spf13/cobra"
)

// versionCmd represents the version command
var versionCmd = &cobra.Command{
	Use:   "version",
	Short: "A brief description of your command",
	Long: `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:

Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
	Run: func(cmd *cobra.Command, args []string) {
		fmt.Println("version called")
	},
}

func init() {
	rootCmd.AddCommand(versionCmd)

	// Here you will define your flags and configuration settings.

	// Cobra supports Persistent Flags which will work for this command
	// and all subcommands, e.g.:
	// versionCmd.PersistentFlags().String("foo", "", "A help for foo")

	// Cobra supports local flags which will only run when this command
	// is called directly, e.g.:
	// versionCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
}