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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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# pylint: disable=unused-argument
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from __future__ import annotations
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from ipaddress import (
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IPv4Network,
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IPv6Network,
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)
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import flask
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import werkzeug
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from searx.tools import config
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from ._helpers import too_many_requests
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def filter_request(
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network: IPv4Network | IPv6Network,
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request: flask.Request,
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cfg: config.Config,
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) -> werkzeug.Response | None:
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if request.headers.get('Connection', '').strip() == 'close':
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return too_many_requests(network, "HTTP header 'Connection=close")
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return None
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