backwards support

encode · Apr 24, 2022 · 2c86a96 · 2c86a96
1 parent 11af5c2
commit 2c86a96
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/starlette/staticfiles.py b/starlette/staticfiles.py
@@ -163,7 +163,11 @@ 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.