head restore

vox_celeb.py

@@ -241,6 +241,11 @@ class VoxCeleb(datasets.GeneratorBasedBuilder):
             lengths = []
             start_positions = []
             for url in sources:
+                head = requests.head(url, auth=(cred_key))
+                if head.status_code == 401:
+                    raise ValueError("failed to authenticate with VoxCeleb host")
+                if head.status_code < 200 or head.status_code >= 300:
+                    raise ValueError("failed to fetch dataset")
                 save_credentials()
                 content_length = head.headers.get("Content-Length")
                 if content_length is None: