使用python命令快速启动http server
当前目录作为 http server 的根目录
一次只能处理一个请求 

python2
python -m SimpleHTTPServer [port]

python3
python -m http.server [port]



用go 实现类似功能
httpFileServer.go
go run httpFileServer.go   -port 7080 -workdir /PATH
 

package main

import (
	"flag"
	"fmt"
	"net/http"
	"strconv"
)

var (
	port    int
	workdir string
)

//  go run httpFileServer.go   -port 7080 -workdir /PATH
func init() {
	flag.IntVar(&port, "port", 8000, "port")
	flag.StringVar(&workdir, "workdir", "./", "workdir")
}

func main() {
	flag.Parse()
	fmt.Println("port:" + strconv.Itoa(port) + ",workdir=" + workdir)
	http.Handle("/", http.FileServer(http.Dir(workdir)))
	err := http.ListenAndServe(":"+strconv.Itoa(port), nil)
	if err != nil {
		fmt.Println(err)
		panic(err)
	}
}

注意 字符串和数字不能直接连接 ，先把 数字转成字符串
也可以用 fmt.Sprintf
s := fmt.Sprintf("number=%d", 9)
fmt.Println(s)

https://gitee.com/dyyx/hellocode/tree/master/demo/go/httpFileServer


 GO flag 命令行参数解析 
 python Simple HTTP Server