photoprism/internal/util/file.go

160 lines
2.8 KiB
Go
Raw Normal View History

package util
import (
"archive/zip"
"fmt"
"io"
"net/http"
"os"
"os/user"
"path/filepath"
"strings"
)
// Returns true if file exists
func Exists(filename string) bool {
info, err := os.Stat(filename)
return err == nil && !info.IsDir()
}
// Returns full path; ~ replaced with actual home directory
func ExpandedFilename(filename string) string {
if filename == "" {
return ""
}
if len(filename) > 2 && filename[:2] == "~/" {
if usr, err := user.Current(); err == nil {
filename = filepath.Join(usr.HomeDir, filename[2:])
}
}
result, err := filepath.Abs(filename)
if err != nil {
panic(err)
}
return result
}
// Extract Zip file in destination directory
func Unzip(src, dest string) (fileNames []string, err error) {
r, err := zip.OpenReader(src)
if err != nil {
return fileNames, err
}
defer r.Close()
for _, f := range r.File {
// Skip directories like __OSX
if strings.HasPrefix(f.Name, "__") {
continue
}
fn, err := copyToFile(f, dest)
if err != nil {
return fileNames, err
}
fileNames = append(fileNames, fn)
}
return fileNames, nil
}
// copyToFile copies the zip file to destination
// if the zip file is a directory, a directory is created at the destination.
func copyToFile(f *zip.File, dest string) (fileName string, err error) {
rc, err := f.Open()
if err != nil {
return fileName, err
}
defer rc.Close()
// Store filename/path for returning and using later on
fileName = filepath.Join(dest, f.Name)
if f.FileInfo().IsDir() {
// Make Folder
return fileName, os.MkdirAll(fileName, os.ModePerm)
}
// Make File
var fdir string
if lastIndex := strings.LastIndex(fileName, string(os.PathSeparator)); lastIndex > -1 {
fdir = fileName[:lastIndex]
}
err = os.MkdirAll(fdir, os.ModePerm)
if err != nil {
return fileName, err
}
fd, err := os.OpenFile(fileName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
if err != nil {
return fileName, err
}
defer fd.Close()
_, err = io.Copy(fd, rc)
if err != nil {
return fileName, err
}
return fileName, nil
}
// Download a file from a URL
func Download(filepath string, url string) error {
os.MkdirAll("/tmp/photoprism", os.ModePerm)
// Create the file
out, err := os.Create(filepath)
if err != nil {
return err
}
defer out.Close()
// Get the data
resp, err := http.Get(url)
if err != nil {
return err
}
defer resp.Body.Close()
// Check server response
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("bad status: %s", resp.Status)
}
// Writer the body to file
_, err = io.Copy(out, resp.Body)
if err != nil {
return err
}
return nil
}
func DirectoryIsEmpty(path string) bool {
f, err := os.Open(path)
if err != nil {
return false
}
defer f.Close()
_, err = f.Readdirnames(1)
if err == io.EOF {
return true
}
return false
}