NSFS | close stream when getting empty content dir

Author: nadavMiz

src/sdk/namespace_fs.js

@@ -1021,8 +1021,12 @@ class NamespaceFS {
 
             // NOTE: don't move this code after the open
             // this can lead to ENOENT failures due to file not exists when content size is 0
-            // if entry is a directory object and its content size = 0 - return empty response
-                    if (await this._is_empty_directory_content(file_path, fs_context, params)) return null;
+            // if entry is a directory object and its content size = 0 - close the stream and return empty response
+            if (await this._is_empty_directory_content(file_path, fs_context, params)) {
+                res.end();
+                await stream_utils.wait_finished(res, { signal: object_sdk.abort_controller.signal });
+                return null;
+            }
 
             file = await nb_native().fs.open(
                 fs_context,