Download http data to file

net_download

package main

import (
	"bufio"
	"net/http"
	"os"
	"fmt"
)

type Url struct {
    url string
}

func (u *Url) download() (*http.Response, *bufio.Reader) {
	resp, err := http.Get(u.url)
	if err != nil {
		panic(err)
	}
	return resp, bufio.NewReader(resp.Body)
}

func downloadUrl(url Url, out *os.File) {
	resp, reader := url.download()
	_,err := reader.WriteTo(out)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()
}

func downloadUrlsToFile(url []string, file string) {
	fo, err := os.Create(file)
	if err != nil {
		panic(err)
	}
	for _, value := range url {
		downloadUrl(Url{value}, fo)
	}
} 

func main() {
	if len(os.Args) != 2 {
		fmt.Println("Syntax: <program> <file-name>")
		return
	}
	downloadUrlsToFile([]string{"http://www.google.com", "http://www.yahoo.com", "http://en.wikipedia.org"}, os.Args[1])

}