func (h *FileService) Delete(f kit.File, u kit.User) apperror.Error {
// Delete file from backend.
if f.GetBackendName() != "" && f.GetBackendId() != "" {
backend := h.Backend(f.GetBackendName())
if backend == nil {
h.Registry().Logger().Errorf("Deleting file %v in backend %v, which is unconfigured", f.GetId(), f.GetBackendName())
} else {
if err := backend.DeleteFile(f); err != nil {
return err
}
}
}
return h.resource.Delete(f, u)
}
func (h FileService) BuildFile(file kit.File, user kit.User, deleteDir, deleteFile bool) apperror.Error {
if h.DefaultBackend == nil {
return &apperror.Err{
Code: "no_default_backend",
Message: "Cant build a file without a default backend.",
}
}
filePath := file.GetTmpPath()
if filePath == "" {
return &apperror.Err{
Code: "no_tmp_path",
Message: "You must set TmpPath on a file before building it.",
Public: true,
}
}
if file.GetBackendName() == "" {
file.SetBackendName(h.DefaultBackend().Name())
}
backend := h.Backend(file.GetBackendName())
if backend == nil {
return &apperror.Err{
Code: "unknown_backend",
Message: fmt.Sprintf("The backend %v does not exist", file.GetBackendName()),
}
}
file.SetBackend(backend)
if file.GetBucket() == "" {
return &apperror.Err{
Code: "missing_bucket",
Message: "Bucket must be set on the file",
}
}
stat, err := os.Stat(filePath)
if err != nil {
if err == os.ErrNotExist {
return &apperror.Err{
Code: "file_not_found",
Message: fmt.Sprintf("File %v does not exist", filePath),
}
}
return apperror.Wrap(err, "stat_error",
fmt.Sprintf("Could not get file stats for file at %v: %v", filePath, err))
}
if stat.IsDir() {
return apperror.New("path_is_directory")
}
// Build the hash.
hash, err2 := utils.BuildFileMD5Hash(filePath)
if err2 != nil {
return err2
}
file.SetHash(hash)
pathParts := strings.Split(filePath, string(os.PathSeparator))
fullName := pathParts[len(pathParts)-1]
nameParts := strings.Split(fullName, ".")
// Determine extension.
extension := ""
if len(nameParts) > 1 {
extension = nameParts[len(nameParts)-1]
}
file.SetFullName(fullName)
file.SetSize(stat.Size())
// Determine mime type.
mimeType := GetMimeType(filePath)
if mimeType == "" {
mimeType = mime.TypeByExtension("." + extension)
}
file.SetMime(mimeType)
if strings.HasPrefix(mimeType, "image") {
file.SetIsImage(true)
file.SetMediaType(MEDIA_TYPE_IMAGE)
// Determine image info.
imageInfo, err := GetImageInfo(filePath)
if imageInfo != nil {
file.SetWidth(int(imageInfo.Width))
file.SetHeight(int(imageInfo.Height))
} else {
h.Registry().Logger().Warningf("Could not determine image info: %v", err)
}
}
if strings.HasPrefix(mimeType, "video") {
file.SetMediaType(MEDIA_TYPE_VIdEO)
}
// Store the file in the backend.
backendId, writer, err2 := file.Writer(true)
if err2 != nil {
return apperror.Wrap(err2, "file_backend_error")
}
defer writer.Close()
// Open file for reading.
f, err := os.Open(filePath)
if err != nil {
return apperror.Wrap(err, "read_error", fmt.Sprintf("Could not read file at %v", filePath))
}
_, err = io.Copy(writer, f)
if err != nil {
f.Close()
return apperror.Wrap(err, "copy_to_backend_failed")
}
f.Close()
// File is stored in backend now!
file.SetBackendId(backendId)
// Persist file to db.
file.SetTmpPath("")
if file.GetStrId() != "" {
err2 = h.resource.Update(file, user)
} else {
err2 = h.resource.Create(file, user)
}
if err2 != nil {
// Delete file from backend again.
backend.DeleteFile(file)
return apperror.Wrap(err2, "db_error", "Could not save file to database")
}
// Delete tmp file.
if deleteFile {
os.Remove(filePath)
}
if deleteDir {
dir := strings.Join(pathParts[:len(pathParts)-1], string(os.PathSeparator))
os.RemoveAll(dir)
}
return nil
}