tor_check.py

Go to the documentation of this file.

# 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
https://check.torproject.org/exit-addresses and parses all the IPs into a list,
then checks if the user's IP address is in it.
 
Enable in ``settings.yml``:
 
.. code:: yaml
 
  enabled_plugins:
    ..
    - 'Tor check plugin'
 
"""
 
import re
from flask_babel import gettext
from httpx import HTTPError
from searx.network import get
 
default_on = False
 
name = gettext("Tor check plugin")
'''Translated name of the 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."
)
'''Translated description of the plugin.'''
 
preference_section = 'query'
'''The preference section where the plugin is shown.'''
 
query_keywords = ['tor-check']
'''Query keywords shown in the preferences.'''
 
query_examples = ''
'''Query examples shown in the preferences.'''
 
# Regex for exit node addresses in the list.
reg = re.compile(r"(?<=ExitAddress )\S+")
 
 
def post_search(request, search):
 
    if search.search_query.pageno > 1:
        return True
 
    if search.search_query.query.lower() == "tor-check":
 
        # Request the list of tor exit nodes.
        try:
            resp = get("https://check.torproject.org/exit-addresses")
            node_list = re.findall(reg, resp.text)
 
        except HTTPError:
            # No answer, return error
            search.result_container.answers["tor"] = {
                "answer": gettext(
                    "Could not download the list of Tor exit-nodes from: https://check.torproject.org/exit-addresses"
                )
            }
            return True
 
        x_forwarded_for = request.headers.getlist("X-Forwarded-For")
 
        if x_forwarded_for:
            ip_address = x_forwarded_for[0]
        else:
            ip_address = request.remote_addr
 
        if ip_address in node_list:
            search.result_container.answers["tor"] = {
                "answer": gettext(
                    "You are using Tor and it looks like you have this external IP address: {ip_address}".format(
                        ip_address=ip_address
                    )
                )
            }
        else:
            search.result_container.answers["tor"] = {
                "answer": gettext(
                    "You are not using Tor and you have this external IP address: {ip_address}".format(
                        ip_address=ip_address
                    )
                )
            }
 
    return True