Fix: unclosed file after get thumbnails

pkg/filesystem/image.go

@@ -52,6 +52,7 @@ func (fs *FileSystem) GenerateThumbnail(ctx context.Context, file *model.File) {
 	if err != nil {
 		return
 	}
+	defer source.Close()
 
 	image, err := thumb.NewThumbFromFile(source, file.Name)
 	if err != nil {

pkg/filesystem/local/handler.go

@@ -69,10 +69,7 @@ func (handler Handler) Put(ctx context.Context, file io.ReadCloser, dst string,
 		util.Log().Warning("无法创建文件，%s", err)
 		return err
 	}
-	defer func() {
-		err := out.Close()
-		fmt.Print(err)
-	}()
+	defer out.Close()
 
 	// 写入文件内容
 	_, err = io.Copy(out, file)