Apply suggestions from code review

Co-authored-by: Ben Wilson <39283302+BenWilson2@users.noreply.github.com>
Signed-off-by: Harutaka Kawamura <hkawamura0130@gmail.com>

mlflow/server/handlers.py

@@ -1573,7 +1573,7 @@ def _download_artifact(artifact_path):
     A request handler for `GET /mlflow-artifacts/artifacts/<artifact_path>` to download an artifact
     from `artifact_path` (a relative path from the root artifact directory).
     """
-    validate_path_is_safe(validate_path_is_safe)
+    validate_path_is_safe(artifact_path)
     tmp_dir = tempfile.TemporaryDirectory()
     artifact_repo = _get_artifact_repo_mlflow_artifacts()
     dst = artifact_repo.download_artifacts(artifact_path, tmp_dir.name)
@@ -1598,7 +1598,7 @@ def _upload_artifact(artifact_path):
     A request handler for `PUT /mlflow-artifacts/artifacts/<artifact_path>` to upload an artifact
     to `artifact_path` (a relative path from the root artifact directory).
     """
-    validate_path_is_safe(validate_path_is_safe)
+    validate_path_is_safe(artifact_path)
     head, tail = posixpath.split(artifact_path)
     with tempfile.TemporaryDirectory() as tmp_dir:
         tmp_path = os.path.join(tmp_dir, tail)