Ponysearch/searx/botdetection/http_accept_encoding.py
Markus Heiser 66fdec0eb9 [mod] limiter: add config file /etc/searxng/limiter.toml
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
2023-06-01 14:38:53 +02:00

29 lines
931 B
Python

# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""
Method ``http_accept_encoding``
-------------------------------
The ``http_accept_encoding`` method evaluates a request as the request of a
bot if the Accept-Encoding_ header ..
- did not contain ``gzip`` AND ``deflate`` (if both values are missed)
- did not contain ``text/html``
.. _Accept-Encoding:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding
"""
# pylint: disable=unused-argument
from typing import Optional, Tuple
import flask
from searx.tools import config
def filter_request(request: flask.Request, cfg: config.Config) -> Optional[Tuple[int, str]]:
accept_list = [l.strip() for l in request.headers.get('Accept-Encoding', '').split(',')]
if not ('gzip' in accept_list or 'deflate' in accept_list):
return 429, "bot detected, HTTP header Accept-Encoding did not contain gzip nor deflate"
return None