mirror of
https://github.com/searxng/searxng.git
synced 2024-12-12 04:16:27 +00:00
542f7d0d7b
In the past, some files were tested with the standard profile, others with a profile in which most of the messages were switched off ... some files were not checked at all. - ``PYLINT_SEARXNG_DISABLE_OPTION`` has been abolished - the distinction ``# lint: pylint`` is no longer necessary - the pylint tasks have been reduced from three to two 1. ./searx/engines -> lint engines with additional builtins 2. ./searx ./searxng_extra ./tests -> lint all other python files Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
128 lines
4.5 KiB
Python
128 lines
4.5 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
# pylint: disable=missing-module-docstring, invalid-name
|
|
from __future__ import annotations
|
|
|
|
from ipaddress import (
|
|
IPv4Network,
|
|
IPv6Network,
|
|
IPv4Address,
|
|
IPv6Address,
|
|
ip_network,
|
|
)
|
|
import flask
|
|
import werkzeug
|
|
|
|
from searx import logger
|
|
from . import config
|
|
|
|
logger = logger.getChild('botdetection')
|
|
|
|
|
|
def dump_request(request: flask.Request):
|
|
return (
|
|
request.path
|
|
+ " || X-Forwarded-For: %s" % request.headers.get('X-Forwarded-For')
|
|
+ " || X-Real-IP: %s" % request.headers.get('X-Real-IP')
|
|
+ " || form: %s" % request.form
|
|
+ " || Accept: %s" % request.headers.get('Accept')
|
|
+ " || Accept-Language: %s" % request.headers.get('Accept-Language')
|
|
+ " || Accept-Encoding: %s" % request.headers.get('Accept-Encoding')
|
|
+ " || Content-Type: %s" % request.headers.get('Content-Type')
|
|
+ " || Content-Length: %s" % request.headers.get('Content-Length')
|
|
+ " || Connection: %s" % request.headers.get('Connection')
|
|
+ " || User-Agent: %s" % request.headers.get('User-Agent')
|
|
)
|
|
|
|
|
|
def too_many_requests(network: IPv4Network | IPv6Network, log_msg: str) -> werkzeug.Response | None:
|
|
"""Returns a HTTP 429 response object and writes a ERROR message to the
|
|
'botdetection' logger. This function is used in part by the filter methods
|
|
to return the default ``Too Many Requests`` response.
|
|
|
|
"""
|
|
|
|
logger.debug("BLOCK %s: %s", network.compressed, log_msg)
|
|
return flask.make_response(('Too Many Requests', 429))
|
|
|
|
|
|
def get_network(real_ip: IPv4Address | IPv6Address, cfg: config.Config) -> IPv4Network | IPv6Network:
|
|
"""Returns the (client) network of whether the real_ip is part of."""
|
|
|
|
if real_ip.version == 6:
|
|
prefix = cfg['real_ip.ipv6_prefix']
|
|
else:
|
|
prefix = cfg['real_ip.ipv4_prefix']
|
|
network = ip_network(f"{real_ip}/{prefix}", strict=False)
|
|
# logger.debug("get_network(): %s", network.compressed)
|
|
return network
|
|
|
|
|
|
_logged_errors = []
|
|
|
|
|
|
def _log_error_only_once(err_msg):
|
|
if err_msg not in _logged_errors:
|
|
logger.error(err_msg)
|
|
_logged_errors.append(err_msg)
|
|
|
|
|
|
def get_real_ip(request: flask.Request) -> str:
|
|
"""Returns real IP of the request. Since not all proxies set all the HTTP
|
|
headers and incoming headers can be faked it may happen that the IP cannot
|
|
be determined correctly.
|
|
|
|
.. sidebar:: :py:obj:`flask.Request.remote_addr`
|
|
|
|
SearXNG uses Werkzeug's ProxyFix_ (with it default ``x_for=1``).
|
|
|
|
This function tries to get the remote IP in the order listed below,
|
|
additional some tests are done and if inconsistencies or errors are
|
|
detected, they are logged.
|
|
|
|
The remote IP of the request is taken from (first match):
|
|
|
|
- X-Forwarded-For_ header
|
|
- `X-real-IP header <https://github.com/searxng/searxng/issues/1237#issuecomment-1147564516>`__
|
|
- :py:obj:`flask.Request.remote_addr`
|
|
|
|
.. _ProxyFix:
|
|
https://werkzeug.palletsprojects.com/middleware/proxy_fix/
|
|
|
|
.. _X-Forwarded-For:
|
|
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For
|
|
|
|
"""
|
|
|
|
forwarded_for = request.headers.get("X-Forwarded-For")
|
|
real_ip = request.headers.get('X-Real-IP')
|
|
remote_addr = request.remote_addr
|
|
# logger.debug(
|
|
# "X-Forwarded-For: %s || X-Real-IP: %s || request.remote_addr: %s", forwarded_for, real_ip, remote_addr
|
|
# )
|
|
|
|
if not forwarded_for:
|
|
_log_error_only_once("X-Forwarded-For header is not set!")
|
|
else:
|
|
from . import cfg # pylint: disable=import-outside-toplevel, cyclic-import
|
|
|
|
forwarded_for = [x.strip() for x in forwarded_for.split(',')]
|
|
x_for: int = cfg['real_ip.x_for'] # type: ignore
|
|
forwarded_for = forwarded_for[-min(len(forwarded_for), x_for)]
|
|
|
|
if not real_ip:
|
|
_log_error_only_once("X-Real-IP header is not set!")
|
|
|
|
if forwarded_for and real_ip and forwarded_for != real_ip:
|
|
logger.warning("IP from X-Real-IP (%s) is not equal to IP from X-Forwarded-For (%s)", real_ip, forwarded_for)
|
|
|
|
if forwarded_for and remote_addr and forwarded_for != remote_addr:
|
|
logger.warning(
|
|
"IP from WSGI environment (%s) is not equal to IP from X-Forwarded-For (%s)", remote_addr, forwarded_for
|
|
)
|
|
|
|
if real_ip and remote_addr and real_ip != remote_addr:
|
|
logger.warning("IP from WSGI environment (%s) is not equal to IP from X-Real-IP (%s)", remote_addr, real_ip)
|
|
|
|
request_ip = forwarded_for or real_ip or remote_addr or '0.0.0.0'
|
|
# logger.debug("get_real_ip() -> %s", request_ip)
|
|
return request_ip
|