mirror of https://github.com/searxng/searxng.git
79 lines
2.7 KiB
ReStructuredText
79 lines
2.7 KiB
ReStructuredText
.. _offline engines:
|
|
|
|
===============
|
|
Offline Engines
|
|
===============
|
|
|
|
.. sidebar:: offline engines
|
|
|
|
- :ref:`demo offline engine`
|
|
- :ref:`sql engines`
|
|
- :ref:`engine command`
|
|
- :origin:`Redis <searx/engines/redis_server.py>`
|
|
|
|
To extend the functionality of SearxNG, offline engines are going to be
|
|
introduced. An offline engine is an engine which does not need Internet
|
|
connection to perform a search and does not use HTTP to communicate.
|
|
|
|
Offline engines can be configured, by adding those to the `engines` list of
|
|
:origin:`settings.yml <searx/settings.yml>`. An example skeleton for offline
|
|
engines can be found in :ref:`demo offline engine` (:origin:`demo_offline.py
|
|
<searx/engines/demo_offline.py>`).
|
|
|
|
|
|
Programming Interface
|
|
=====================
|
|
|
|
:py:func:`init(engine_settings=None) <searx.engines.demo_offline.init>`
|
|
All offline engines can have their own init function to setup the engine before
|
|
accepting requests. The function gets the settings from settings.yml as a
|
|
parameter. This function can be omitted, if there is no need to setup anything
|
|
in advance.
|
|
|
|
:py:func:`search(query, params) <searx.engines.demo_offline.searc>`
|
|
|
|
Each offline engine has a function named ``search``. This function is
|
|
responsible to perform a search and return the results in a presentable
|
|
format. (Where *presentable* means presentable by the selected result
|
|
template.)
|
|
|
|
The return value is a list of results retrieved by the engine.
|
|
|
|
Engine representation in ``/config``
|
|
If an engine is offline, the attribute ``offline`` is set to ``True``.
|
|
|
|
.. _offline requirements:
|
|
|
|
Extra Dependencies
|
|
==================
|
|
|
|
If an offline engine depends on an external tool, SearxNG does not install it by
|
|
default. When an administrator configures such engine and starts the instance,
|
|
the process returns an error with the list of missing dependencies. Also,
|
|
required dependencies will be added to the comment/description of the engine, so
|
|
admins can install packages in advance.
|
|
|
|
If there is a need to install additional packages in *Python's Virtual
|
|
Environment* of your SearxNG instance you need to switch into the environment
|
|
(:ref:`searx-src`) first, for this you can use :ref:`searx.sh`::
|
|
|
|
$ sudo utils/searx.sh shell
|
|
(searx-pyenv)$ pip install ...
|
|
|
|
|
|
Private engines (Security)
|
|
==========================
|
|
|
|
To limit the access to offline engines, if an instance is available publicly,
|
|
administrators can set token(s) for each of the :ref:`private engines`. If a
|
|
query contains a valid token, then SearxNG performs the requested private
|
|
search. If not, requests from an offline engines return errors.
|
|
|
|
|
|
Acknowledgement
|
|
===============
|
|
|
|
This development was sponsored by `Search and Discovery Fund
|
|
<https://nlnet.nl/discovery>`_ of `NLnet Foundation <https://nlnet.nl/>`_ .
|
|
|