如何高效地将命令行字符串参数转换为自定义结构体？

package main

import (
    "flag"
    "fmt"
)

type Poc struct {
    method    string
    headers   headers
    path      string
    body      string
    expression int
}

type headers struct {
    UserAgent    string
    Accept       string
    XForwardedFor string
    ContentType   string
    Referer       string
    AcceptLanguage string
    Cookie        string
}

func main() {
    var module string
    flag.StringVar(&module, "m", "H1", "module: all")
    flag.Parse()

    pocMap := map[string]Poc{
        "H1": {method: "GET", path: "/resin-doc/viewfile/?file=index.jsp", body: "", expression: 200, headers: headers{UserAgent: "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"}},
        // ... 添加更多Poc结构体实例
    }

    poc, ok := pocMap[module]
    if !ok {
        fmt.Println("无效的模块名称")
        return
    }

    method, path, header, body := getpocinfo(poc)
    fmt.Println(method + ":" + path + ":" + header + ":" + body)
}

func getpocinfo(id Poc) (method, path, header, body string) {
    method = id.method
    path = id.path
    header = id.headers.UserAgent
    body = id.body
    return
}