[mod] data: implement a simple tracker URL (SQL) database

On demand, the tracker data is loaded directly into the cache, so that the
maintenance of this data via PRs is no longer necessary.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 8 insertions, 42 deletions

diff --git a/searx/plugins/tracker_url_remover.py b/searx/plugins/tracker_url_remover.py
index efc593775..b7e8e25f3 100644
--- a/searx/plugins/tracker_url_remover.py
+++ b/searx/plugins/tracker_url_remover.py
@@ -2,17 +2,15 @@
 # pylint: disable=missing-module-docstring, unused-argument
 
 from __future__ import annotations
-import typing
 
-import re
-from urllib.parse import urlparse, urlunparse, parse_qsl, urlencode
+import logging
+import typing
 
 from flask_babel import gettext
 
 from searx.data import TRACKER_PATTERNS
 
 from . import Plugin, PluginInfo
-from ._core import log
 
 if typing.TYPE_CHECKING:
     from searx.search import SearchWithPlugins
@@ -21,13 +19,16 @@ if typing.TYPE_CHECKING:
     from searx.plugins import PluginCfg
 
 
+log = logging.getLogger("searx.plugins.tracker_url_remover")
+
+
 class SXNGPlugin(Plugin):
     """Remove trackers arguments from the returned URL."""
 
     id = "tracker_url_remover"
-    log = log.getChild(id)
 
     def __init__(self, plg_cfg: "PluginCfg") -> None:
+
         super().__init__(plg_cfg)
         self.info = PluginInfo(
             id=self.id,
@@ -47,42 +48,7 @@ class SXNGPlugin(Plugin):
         If URL should be modified, the returned string is the new URL to use."""
 
         if not url_src:
-            cls.log.debug("missing a URL in field %s", field_name)
+            log.debug("missing a URL in field %s", field_name)
             return True
 
-        new_url = url_src
-        parsed_new_url = urlparse(url=new_url)
-
-        for rule in TRACKER_PATTERNS:
-
-            if not re.match(rule["urlPattern"], new_url):
-                # no match / ignore pattern
-                continue
-
-            in_exceptions = False
-            for exception in rule["exceptions"]:
-                if re.match(exception, new_url):
-                    in_exceptions = True
-                    break
-            if in_exceptions:
-                # pattern is in the list of exceptions / ignore pattern
-                # hint: we can't break the outer pattern loop since we have
-                # overlapping urlPattern like ".*"
-                continue
-
-            # remove tracker arguments from the url-query part
-            query_args: list[tuple[str, str]] = list(parse_qsl(parsed_new_url.query))
-
-            for name, val in query_args.copy():
-                for reg in rule["trackerParams"]:
-                    if re.match(reg, name):
-                        cls.log.debug("%s remove tracker arg: %s='%s'", parsed_new_url.netloc, name, val)
-                        query_args.remove((name, val))
-
-            parsed_new_url = parsed_new_url._replace(query=urlencode(query_args))
-            new_url = urlunparse(parsed_new_url)
-
-        if new_url != url_src:
-            return new_url
-
-        return True
+        return TRACKER_PATTERNS.clean_url(url=url_src)