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- # coding=utf-8
- # Copyright 2022-present, the HuggingFace Inc. team.
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- """Contains utilities to handle pagination on Huggingface Hub."""
- from typing import Dict, Iterable, Optional
- import requests
- from . import get_session, hf_raise_for_status, http_backoff, logging
- logger = logging.get_logger(__name__)
- def paginate(path: str, params: Dict, headers: Dict) -> Iterable:
- """Fetch a list of models/datasets/spaces and paginate through results.
- This is using the same "Link" header format as GitHub.
- See:
- - https://requests.readthedocs.io/en/latest/api/#requests.Response.links
- - https://docs.github.com/en/rest/guides/traversing-with-pagination#link-header
- """
- session = get_session()
- r = session.get(path, params=params, headers=headers)
- hf_raise_for_status(r)
- yield from r.json()
- # Follow pages
- # Next link already contains query params
- next_page = _get_next_page(r)
- while next_page is not None:
- logger.debug(f"Pagination detected. Requesting next page: {next_page}")
- r = http_backoff("GET", next_page, max_retries=20, retry_on_status_codes=429, headers=headers)
- hf_raise_for_status(r)
- yield from r.json()
- next_page = _get_next_page(r)
- def _get_next_page(response: requests.Response) -> Optional[str]:
- return response.links.get("next", {}).get("url")
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