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# SPDX-License-Identifier: AGPL-3.0-or-later
"""A plugin to check if the ip address of the request is a Tor exit-node if the
user searches for ``tor-check``. It fetches the tor exit node list from
:py:obj:`url_exit_list` and parses all the IPs into a list, then checks if the
user's IP address is in it.
"""
from __future__ import annotations
import typing
import re
from flask_babel import gettext
from httpx import HTTPError
from searx.network import get
from searx.plugins import Plugin, PluginInfo
from searx.result_types import EngineResults
from searx.botdetection import get_real_ip
if typing.TYPE_CHECKING:
from searx.search import SearchWithPlugins
from searx.extended_types import SXNG_Request
from searx.plugins import PluginCfg
# Regex for exit node addresses in the list.
reg = re.compile(r"(?<=ExitAddress )\S+")
url_exit_list = "https://check.torproject.org/exit-addresses"
"""URL to load Tor exit list from."""
class SXNGPlugin(Plugin):
"""Rewrite hostnames, remove results or prioritize them."""
id = "tor_check"
keywords = ["tor-check", "tor_check", "torcheck", "tor", "tor check"]
def __init__(self, plg_cfg: "PluginCfg") -> None:
super().__init__(plg_cfg)
self.info = PluginInfo(
id=self.id,
name=gettext("Tor check plugin"),
description=gettext(
"This plugin checks if the address of the request is a Tor exit-node, and"
" informs the user if it is; like check.torproject.org, but from SearXNG."
),
preference_section="query",
)
def post_search(self, request: "SXNG_Request", search: "SearchWithPlugins") -> EngineResults:
results = EngineResults()
if search.search_query.pageno > 1:
return results
if search.search_query.query.lower() in self.keywords:
# Request the list of tor exit nodes.
try:
resp = get(url_exit_list)
node_list = re.findall(reg, resp.text) # type: ignore
except HTTPError:
# No answer, return error
msg = gettext("Could not download the list of Tor exit-nodes from")
results.add(results.types.Answer(answer=f"{msg} {url_exit_list}"))
return results
real_ip = get_real_ip(request)
if real_ip in node_list:
msg = gettext("You are using Tor and it looks like you have the external IP address")
results.add(results.types.Answer(answer=f"{msg} {real_ip}"))
else:
msg = gettext("You are not using Tor and you have the external IP address")
results.add(results.types.Answer(answer=f"{msg} {real_ip}"))
return results
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