from typing import Optional
from urllib.parse import urlparse
def bucket_name_from_url(url: str) -> Optional[str]:
path = urlparse(url).path.lstrip("/")
parts = path.lstrip("/").split("/")
if len(parts) == 0 or parts[0] == "":
return None
return parts[0]
def parse_key_name(path: str) -> str:
return "/".join(path.split("/")[2:])