backwards support

encode · Apr 20, 2022 · e201817 · e201817
1 parent 40b66a2
commit e201817
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/starlette/staticfiles.py b/starlette/staticfiles.py
@@ -159,7 +159,11 @@ def lookup_path(
             original_path = Path(directory).joinpath(path)
             full_path = original_path.resolve()
             directory = Path(directory).resolve()
-            is_internal = full_path.is_relative_to(directory)
+            try:
+                full_path.relative_to(directory)
+                is_internal = True
+            except ValueError:
+                is_internal = False
             if not is_internal and not original_path.is_symlink():
                 # Don't allow misbehaving clients to break out of the static files
                 # directory if not following symlinks.