diff --git a/server/filesystem/compress.go b/server/filesystem/compress.go
index 25476c1e..190af3a8 100644
--- a/server/filesystem/compress.go
+++ b/server/filesystem/compress.go
@@ -54,13 +54,6 @@ func (fs *Filesystem) CompressFiles(dir string, paths []string) (ufs.FileInfo, e
 	return f.Stat()
 }
 
-type FileFS struct {
-	File        io.ReadCloser
-	Compression archiver.Compression
-	// 添加 FileName 字段来单独存储文件名
-	FileName string
-}
-
 // decodeGBK 解码 GBK 编码的字符串
 func decodeGBK(input string) (string, error) {
 	decoder := simplifiedchinese.GBK.NewDecoder()
@@ -71,6 +64,23 @@ func decodeGBK(input string) (string, error) {
 	return decoded, nil
 }
 
+// FileFS represents a file system for a compressed file.
+type FileFS struct {
+	File        ufs.File
+	Compression archiver.Compression
+	// Add FileName field
+	FileName string
+}
+
+// NewFileFS returns a new instance of a FileFS.
+func NewFileFS(file ufs.File, compression archiver.Compression, fileName string) *FileFS {
+	return &FileFS{
+		File:        file,
+		Compression: compression,
+		FileName:    fileName,
+	}
+}
+
 // archiverFileSystem 使用 archiver 根据文件的格式返回文件系统
 func (fs *Filesystem) archiverFileSystem(ctx context.Context, p string) (iofs.FS, error) {
 	f, err := fs.unixFS.Open(p)
@@ -114,9 +124,11 @@ func (fs *Filesystem) archiverFileSystem(ctx context.Context, p string) (iofs.FS
 				if err != nil {
 					return nil, err
 				}
-				return archiverext.FileFS{File: f, Compression: ff, FileName: gbkName}, nil
+				// Use NewFileFS constructor to create FileFS instance
+				return archiverext.NewFileFS(f, ff, gbkName), nil
 			}
-			return archiverext.FileFS{File: f, Compression: ff}, nil
+			// Use NewFileFS constructor to create FileFS instance
+			return archiverext.NewFileFS(f, ff, filepath.Base(p)), nil
 		}
 	}
 	_ = f.Close()