searxng/searx/botdetection/http_accept.py

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# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""
Method ``http_accept``
----------------------
The ``http_accept`` method evaluates a request as the request of a bot if the
Accept_ header ..
- did not contain ``text/html``
.. _Accept:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept
"""
from typing import Optional, Tuple
import flask
def filter_request(request: flask.Request) -> Optional[Tuple[int, str]]:
if 'text/html' not in request.accept_mimetypes:
return 429, "bot detected, HTTP header Accept did not contain text/html"
return None