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searxng/docs/dev/plugins.rst

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.. _dev plugin:
=======
Plugins
=======
.. sidebar:: Further reading ..
- :ref:`plugins generic`
Plugins can extend or replace functionality of various components of searx.
Example plugin
==============
.. code:: python
name = 'Example plugin'
description = 'This plugin extends the suggestions with the word "example"'
default_on = False # disabled by default
js_dependencies = tuple() # optional, list of static js files
css_dependencies = tuple() # optional, list of static css files
# attach callback to the post search hook
# request: flask request object
# ctx: the whole local context of the post search hook
def post_search(request, search):
search.result_container.suggestions.add('example')
return True
External plugins
================
SearXNG supports *external plugins* / there is no need to install one, SearXNG
runs out of the box. But to demonstrate; in the example below we install the
SearXNG plugins from *The Green Web Foundation* `[ref]
<https://www.thegreenwebfoundation.org/news/searching-the-green-web-with-searx/>`__:
.. code:: bash
$ sudo utils/searxng.sh instance cmd bash
(searxng-pyenv)$ pip install git+https://github.com/return42/tgwf-searx-plugins
In the :ref:`settings.yml` activate the ``plugins:`` section and add module
``only_show_green_results`` from ``tgwf-searx-plugins``.
.. code:: yaml
plugins:
...
- only_show_green_results
...
Plugin entry points
===================
Entry points (hooks) define when a plugin runs. Right now only three hooks are
implemented. So feel free to implement a hook if it fits the behaviour of your
plugin. A plugin doesn't need to implement all the hooks.
.. py:function:: pre_search(request, search) -> bool
Runs BEFORE the search request.
`search.result_container` can be changed.
Return a boolean:
* True to continue the search
* False to stop the search
:param flask.request request:
:param searx.search.SearchWithPlugins search:
:return: False to stop the search
:rtype: bool
.. py:function:: post_search(request, search) -> None
Runs AFTER the search request.
:param flask.request request: Flask request.
:param searx.search.SearchWithPlugins search: Context.
.. py:function:: on_result(request, search, result) -> bool
Runs for each result of each engine.
`result` can be changed.
If `result["url"]` is defined, then `result["parsed_url"] = urlparse(result['url'])`
.. warning::
`result["url"]` can be changed, but `result["parsed_url"]` must be updated too.
Return a boolean:
* True to keep the result
* False to remove the result
:param flask.request request:
:param searx.search.SearchWithPlugins search:
:param typing.Dict result: Result, see - :ref:`engine results`
:return: True to keep the result
:rtype: bool