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http_connection.py
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1# SPDX-License-Identifier: AGPL-3.0-or-later
2"""
3Method ``http_connection``
4--------------------------
5
6The ``http_connection`` method evaluates a request as the request of a bot if
7the Connection_ header is set to ``close``.
8
9.. _Connection:
10 https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Connection
11
12"""
13
14from __future__ import annotations
15from ipaddress import (
16 IPv4Network,
17 IPv6Network,
18)
19
20import werkzeug
21import flask
22
23from . import config
24from ._helpers import too_many_requests
25
26
28 network: IPv4Network | IPv6Network,
29 request: flask.Request,
30 cfg: config.Config, # pylint: disable=unused-argument
31) -> werkzeug.Response | None:
32
33 if request.headers.get('Connection', '').strip() == 'close':
34 return too_many_requests(network, "HTTP header 'Connection=close")
35 return None
werkzeug.Response|None filter_request(IPv4Network|IPv6Network network, flask.Request request, config.Config cfg)