poron.go

func download_file(destination string, url string) error {
    fmt.Println("%s -> %s\n", url, destination)
    res, err := http.Get(url)
    if err != nil {
        log.Println(err)
        return errors.New("Can't fetch data from URL")
    }

    defer res.Body.Close()

    file, err := os.Create(destination)
    if err != nil {
        log.Println(err)
        return errors.New("Can't open file")
    }

    io.Copy(file, res.Body)
    file.Close()

    return nil
}