fix(list_dir): check permissions before reading and remove . and $ fo…

…lders

antarest/study/storage/explorer_service.py

@@ -11,6 +11,7 @@
 # This file is part of the Antares project.
 
 import logging
+import os
 from typing import List
 
 from antarest.core.config import Config
@@ -40,11 +41,19 @@ def list_dir(
         workspace = get_workspace_from_config(self.config, workspace_name, default_allowed=False)
         directory_path = get_folder_from_workspace(workspace, workspace_directory_path)
         directories = []
-        for child in directory_path.iterdir():
-            if child.is_dir() and not is_study_folder(child) and not should_ignore_folder_for_scan(child):
-                # we don't want to expose the full absolute path on the server
-                child_rel_path = child.relative_to(workspace.path)
-                directories.append(NonStudyFolderDTO(path=child_rel_path, workspace=workspace_name, name=child.name))
+        if os.access(directory_path, os.R_OK):  # we don't want to try to read folders we can't access
+            for child in directory_path.iterdir():
+                if (
+                    child.is_dir()
+                    and not is_study_folder(child)
+                    and not should_ignore_folder_for_scan(child)
+                    and not child.name.startswith((".", "$"))
+                ):
+                    # we don't want to expose the full absolute path on the server
+                    child_rel_path = child.relative_to(workspace.path)
+                    directories.append(
+                        NonStudyFolderDTO(path=child_rel_path, workspace=workspace_name, name=child.name)
+                    )
         return directories
 
     def list_workspaces(