forked from zaclys/searxng
80 lines
1.9 KiB
Python
80 lines
1.9 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
# lint: pylint
|
|
""".. _limiter src:
|
|
|
|
Limiter
|
|
=======
|
|
|
|
.. sidebar:: info
|
|
|
|
The limiter requires a :ref:`Redis <settings redis>` database.
|
|
|
|
Bot protection / IP rate limitation. The intention of rate limitation is to
|
|
limit suspicious requests from an IP. The motivation behind this is the fact
|
|
that SearXNG passes through requests from bots and is thus classified as a bot
|
|
itself. As a result, the SearXNG engine then receives a CAPTCHA or is blocked
|
|
by the search engine (the origin) in some other way.
|
|
|
|
To avoid blocking, the requests from bots to SearXNG must also be blocked, this
|
|
is the task of the limiter. To perform this task, the limiter uses the methods
|
|
from the :py:obj:`searx.botdetection`.
|
|
|
|
To enable the limiter activate:
|
|
|
|
.. code:: yaml
|
|
|
|
server:
|
|
...
|
|
limiter: true # rate limit the number of request on the instance, block some bots
|
|
|
|
and set the redis-url connection. Check the value, it depends on your redis DB
|
|
(see :ref:`settings redis`), by example:
|
|
|
|
.. code:: yaml
|
|
|
|
redis:
|
|
url: unix:///usr/local/searxng-redis/run/redis.sock?db=0
|
|
|
|
"""
|
|
|
|
from typing import Optional, Tuple
|
|
import flask
|
|
|
|
from searx.botdetection import (
|
|
http_accept,
|
|
http_accept_encoding,
|
|
http_accept_language,
|
|
http_connection,
|
|
http_user_agent,
|
|
ip_limit,
|
|
)
|
|
|
|
|
|
def filter_request(request: flask.Request) -> Optional[Tuple[int, str]]:
|
|
|
|
if request.path == '/healthz':
|
|
return None
|
|
|
|
for func in [
|
|
http_user_agent,
|
|
]:
|
|
val = func.filter_request(request)
|
|
if val is not None:
|
|
return val
|
|
|
|
if request.path == '/search':
|
|
|
|
for func in [
|
|
http_accept,
|
|
http_accept_encoding,
|
|
http_accept_language,
|
|
http_connection,
|
|
http_user_agent,
|
|
ip_limit,
|
|
]:
|
|
val = func.filter_request(request)
|
|
if val is not None:
|
|
return val
|
|
|
|
return None
|