mirror of
https://github.com/searxng/searxng.git
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b8c7c2c9aa
- counting requests in LONG_WINDOW and BURST_WINDOW is not needed when the request is validated by the link_token method [1] - renew a ping-key on validation [2], this is needed for infinite scrolling, where no new token (CSS) is loaded. / this does not fix the BURST_MAX issue in the vanilla limiter - normalize the counter names of the ip_limit method to 'ip_limit.*' - just integrate the ip_limit method straight forward in the limiter plugin / non intermediate code --> ip_limit now returns None or a werkzeug.Response object that can be passed by the plugin to the flask application / non intermediate code that returns a tuple [1] https://github.com/searxng/searxng/pull/2357#issuecomment-1566113277 [2] https://github.com/searxng/searxng/pull/2357#discussion_r1208542206 [3] https://github.com/searxng/searxng/pull/2357#issuecomment-1566125979 Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
93 lines
3.6 KiB
Python
93 lines
3.6 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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# pylint: disable=missing-module-docstring, invalid-name
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from typing import Optional
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import flask
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import werkzeug
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from searx import logger
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logger = logger.getChild('botdetection')
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def dump_request(request: flask.Request):
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return (
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"%s: %s" % (get_real_ip(request), request.path)
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+ " || X-Forwarded-For: %s" % request.headers.get('X-Forwarded-For')
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+ " || X-Real-IP: %s" % request.headers.get('X-Real-IP')
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+ " || form: %s" % request.form
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+ " || Accept: %s" % request.headers.get('Accept')
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+ " || Accept-Language: %s" % request.headers.get('Accept-Language')
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+ " || Accept-Encoding: %s" % request.headers.get('Accept-Encoding')
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+ " || Content-Type: %s" % request.headers.get('Content-Type')
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+ " || Content-Length: %s" % request.headers.get('Content-Length')
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+ " || Connection: %s" % request.headers.get('Connection')
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+ " || User-Agent: %s" % request.headers.get('User-Agent')
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)
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def too_many_requests(request: flask.Request, log_msg: str) -> Optional[werkzeug.Response]:
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log_prefix = 'BLOCK %s: ' % get_real_ip(request)
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logger.debug(log_prefix + log_msg)
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return flask.make_response(('Too Many Requests', 429))
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def get_real_ip(request: flask.Request) -> str:
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"""Returns real IP of the request. Since not all proxies set all the HTTP
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headers and incoming headers can be faked it may happen that the IP cannot
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be determined correctly.
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.. sidebar:: :py:obj:`flask.Request.remote_addr`
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SearXNG uses Werkzeug's ProxyFix_ (with it default ``x_for=1``).
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This function tries to get the remote IP in the order listed below,
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additional some tests are done and if inconsistencies or errors are
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detected, they are logged.
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The remote IP of the request is taken from (first match):
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- X-Forwarded-For_ header
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- `X-real-IP header <https://github.com/searxng/searxng/issues/1237#issuecomment-1147564516>`__
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- :py:obj:`flask.Request.remote_addr`
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.. _ProxyFix:
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https://werkzeug.palletsprojects.com/middleware/proxy_fix/
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.. _X-Forwarded-For:
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https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For
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"""
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forwarded_for = request.headers.get("X-Forwarded-For")
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real_ip = request.headers.get('X-Real-IP')
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remote_addr = request.remote_addr
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logger.debug("X-Forwarded-For: %s || X-Real-IP: %s || request.remote_addr: %s", forwarded_for, real_ip, remote_addr)
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if not forwarded_for:
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logger.error("X-Forwarded-For header is not set!")
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else:
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from .limiter import get_cfg # pylint: disable=import-outside-toplevel, cyclic-import
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forwarded_for = [x.strip() for x in forwarded_for.split(',')]
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x_for: int = get_cfg()['real_ip.x_for']
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forwarded_for = forwarded_for[-min(len(forwarded_for), x_for)]
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if not real_ip:
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logger.error("X-Real-IP header is not set!")
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if forwarded_for and real_ip and forwarded_for != real_ip:
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logger.warning("IP from X-Real-IP (%s) is not equal to IP from X-Forwarded-For (%s)", real_ip, forwarded_for)
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if forwarded_for and remote_addr and forwarded_for != remote_addr:
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logger.warning(
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"IP from WSGI environment (%s) is not equal to IP from X-Forwarded-For (%s)", remote_addr, forwarded_for
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)
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if real_ip and remote_addr and real_ip != remote_addr:
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logger.warning("IP from WSGI environment (%s) is not equal to IP from X-Real-IP (%s)", remote_addr, real_ip)
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request_ip = forwarded_for or real_ip or remote_addr or '0.0.0.0'
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logger.debug("get_real_ip() -> %s", request_ip)
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return request_ip
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