golang将文件保存到桌面

Question

I'm trying to saving files to my desktop, however whenever I run my script it saves the file in whatever directory the go script is located in.

This is the chunk of code i'm working with

func (d *downloader) downloadToFile(key string) {
    // Create the directories in the path
    // desktop path
    desktop := "Desktop/" + d.dir
    file := filepath.Join(desktop, key)
    if err := os.MkdirAll(filepath.Dir(file), 0775); err != nil {
        panic(err)
    }

    // Setup the local file
    fd, err := os.Create(file)
    if err != nil {
        panic(err)
    }
    defer fd.Close()

    // Download the file using the AWS SDK
    fmt.Printf("Downloading s3://%s/%s to %s...
", d.bucket, key, file)
    params := &s3.GetObjectInput{Bucket: &d.bucket, Key: &key}
    d.Download(fd, params)
    _, e := d.Download(fd, params)
    if e != nil {
        panic(e)
    }
}

I've tried the path

desktop := "Desktop/" + d.dir
desktop := "/Desktop/" + d.dir
desktop := "Desktop/" + d.dir
desktop := "~/Desktop/ + d.dir

I can't seem to get the files to save to the desktop, for instance when i tried

desktop := "~/Desktop/ + d.dir

A directory ~ was created, inside of ~ Desktop was created, inside of Desktop the d.dir was created, and in there all the files. Again I want to run the script an no matter where I run it I want to d.dir folder with it's contents so be created on the desktop.

Answer 1

You can find current user profile using this function - https://godoc.org/os/user#Current

So, depending on your OS, desktop will be in corresponding folder in home directory.

something like this

   myself, error := user.Current()
   if error != nill {
     panic(error)
   }
   homedir := myself.HomeDir
   desktop := homedir+"/Desktop/" + d.dir

also it is worth notice, that there is a github.com/mitchellh/go-homedir library that is a Go library for detecting the user's home directory without the use of cgo, so the library can be used in cross-compilation environments. So using it can be better to make your program more portable.