Go语言实现Windows命令行下载文件.

package main

import (
	"fmt"
	"io"
	"net/http"
	"os"
	"strings"
	"sync"
)

var go_lock sync.WaitGroup

func main() {
	if len(os.Args) < 2 {
		fmt.Println("Param error!")
		return
	}
	for _, v := range os.Args[1:] {
		go_lock.Add(1)
		fmt.Printf("Get %s\n", v)
		go client(v)
	}
	go_lock.Wait()
}

func client(url string) {
	resp, err := http.Get(url)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("Host %s \nrequest status :%d\nfilelength :%d bytes\n",
		resp.Request.URL.Host, resp.StatusCode,
		resp.ContentLength)
	defer func() {
		resp.Body.Close()
		go_lock.Done()
	}()
	path := resp.Request.URL.Path
	if !strings.HasSuffix(path, "/") {
		path = path + "/"
	}
	list := strings.Split(path, "/")
	filename := list[len(list)-2]
	File, err := os.Create(filename)
	if err != nil {
		fmt.Println(err)
		return
	}
	io.Copy(File, resp.Body)
	File.Close()
}

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