searxng/searx/plugins/hash_plugin.py
Markus Heiser 50f92779bd [refactor] migrate plugins from "module" to class SXNGPlugin
This patch brings two major changes:

- ``Result.filter_urls(..)`` to pass a filter function for URL fields
- The ``enabled_plugins:`` section in SearXNG's settings do no longer exists.

To understand plugin development compile documentation:

    $ make docs.clean docs.live

and read http://0.0.0.0:8000/dev/plugins/development.html

There is no longer a distinction between built-in and external plugin, all
plugins are registered via the settings in the ``plugins:`` section.

In SearXNG, plugins can be registered via a fully qualified class name.  A
configuration (`PluginCfg`) can be transferred to the plugin, e.g. to activate
it by default / *opt-in* or *opt-out* from user's point of view.

built-in plugins
================

The built-in plugins are all located in the namespace `searx.plugins`.

.. code:: yaml

    plugins:

      searx.plugins.calculator.SXNGPlugin:
        active: true

      searx.plugins.hash_plugin.SXNGPlugin:
        active: true

      searx.plugins.self_info.SXNGPlugin:
        active: true

      searx.plugins.tracker_url_remover.SXNGPlugin:
        active: true

      searx.plugins.unit_converter.SXNGPlugin:
        active: true

      searx.plugins.ahmia_filter.SXNGPlugin:
        active: true

      searx.plugins.hostnames.SXNGPlugin:
        active: true

      searx.plugins.oa_doi_rewrite.SXNGPlugin:
        active: false

      searx.plugins.tor_check.SXNGPlugin:
        active: false

external plugins
================

SearXNG supports *external plugins* / there is no need to install one, SearXNG
runs out of the box.

- Only show green hosted results: https://github.com/return42/tgwf-searx-plugins/

To get a developer installation in a SearXNG developer environment:

.. code:: sh

   $ git clone git@github.com:return42/tgwf-searx-plugins.git
   $ ./manage pyenv.cmd python -m \
         pip install -e tgwf-searx-plugins

To register the plugin in SearXNG add ``only_show_green_results.SXNGPlugin`` to
the ``plugins:``:

.. code:: yaml

    plugins:
      # ...
      only_show_green_results.SXNGPlugin:
        active: false

Result.filter_urls(..)
======================

The ``Result.filter_urls(..)`` can be used to filter and/or modify URL fields.
In the following example, the filter function ``my_url_filter``:

.. code:: python

   def my_url_filter(result, field_name, url_src) -> bool | str:
       if "google" in url_src:
           return False              # remove URL field from result
       if "facebook" in url_src:
           new_url = url_src.replace("facebook", "fb-dummy")
           return new_url            # return modified URL
       return True                   # leave URL in field unchanged

is applied to all URL fields in the :py:obj:`Plugin.on_result` hook:

.. code:: python

   class MyUrlFilter(Plugin):
       ...
       def on_result(self, request, search, result) -> bool:
           result.filter_urls(my_url_filter)
           return True

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
2025-03-29 10:16:43 +01:00

67 lines
2.0 KiB
Python

# SPDX-License-Identifier: AGPL-3.0-or-later
# pylint: disable=missing-module-docstring, missing-class-docstring
from __future__ import annotations
import typing
import re
import hashlib
from flask_babel import gettext
from searx.plugins import Plugin, PluginInfo
from searx.result_types import EngineResults
if typing.TYPE_CHECKING:
from searx.search import SearchWithPlugins
from searx.extended_types import SXNG_Request
from searx.plugins import PluginCfg
class SXNGPlugin(Plugin):
"""Plugin converts strings to different hash digests. The results are
displayed in area for the "answers".
"""
id = "hash_plugin"
keywords = ["md5", "sha1", "sha224", "sha256", "sha384", "sha512"]
def __init__(self, plg_cfg: "PluginCfg") -> None:
super().__init__(plg_cfg)
self.parser_re = re.compile(f"({'|'.join(self.keywords)}) (.*)", re.I)
self.info = PluginInfo(
id=self.id,
name=gettext("Hash plugin"),
description=gettext("Converts strings to different hash digests."),
examples=["sha512 The quick brown fox jumps over the lazy dog"],
preference_section="query",
)
def post_search(self, request: "SXNG_Request", search: "SearchWithPlugins") -> EngineResults:
"""Returns a result list only for the first page."""
results = EngineResults()
if search.search_query.pageno > 1:
return results
m = self.parser_re.match(search.search_query.query)
if not m:
# wrong query
return results
function, string = m.groups()
if not string.strip():
# end if the string is empty
return results
# select hash function
f = hashlib.new(function.lower())
# make digest from the given string
f.update(string.encode("utf-8").strip())
answer = function + " " + gettext("hash digest") + ": " + f.hexdigest()
results.add(results.types.Answer(answer=answer))
return results