forked from zaclys/searxng
24 lines
608 B
Python
24 lines
608 B
Python
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""
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Method ``http_connection``
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--------------------------
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The ``http_connection`` method evaluates a request as the request of a bot if
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the Connection_ header is set to ``close``.
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.. _Connection:
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https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Connection
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"""
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from typing import Optional, Tuple
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import flask
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def filter_request(request: flask.Request) -> Optional[Tuple[int, str]]:
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if request.headers.get('Connection', '').strip() == 'close':
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return 429, "bot detected, HTTP header 'Connection=close'"
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return None
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