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244 lines
7.9 KiB
ReStructuredText
244 lines
7.9 KiB
ReStructuredText
.. _settings engine:
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===========
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``engine:``
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===========
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.. sidebar:: Further reading ..
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- :ref:`configured engines`
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- :ref:`engines-dev`
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In the code example below a *full fledged* example of a YAML setup from a dummy
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engine is shown. Most of the options have a default value or even are optional.
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.. hint::
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A few more options are possible, but they are pretty specific to some
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engines (:ref:`engine implementations`).
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.. code:: yaml
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- name: example engine
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engine: example
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shortcut: demo
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base_url: 'https://{language}.example.com/'
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send_accept_language_header: false
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categories: general
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timeout: 3.0
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api_key: 'apikey'
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disabled: false
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language: en_US
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tokens: [ 'my-secret-token' ]
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weight: 1
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display_error_messages: true
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about:
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website: https://example.com
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wikidata_id: Q306656
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official_api_documentation: https://example.com/api-doc
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use_official_api: true
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require_api_key: true
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results: HTML
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# overwrite values from section 'outgoing:'
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enable_http2: false
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retries: 1
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max_connections: 100
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max_keepalive_connections: 10
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keepalive_expiry: 5.0
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using_tor_proxy: false
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proxies:
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http:
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- http://proxy1:8080
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- http://proxy2:8080
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https:
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- http://proxy1:8080
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- http://proxy2:8080
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- socks5://user:password@proxy3:1080
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- socks5h://user:password@proxy4:1080
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# other network settings
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enable_http: false
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retry_on_http_error: true # or 403 or [404, 429]
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``name`` :
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Name that will be used across SearXNG to define this engine. In settings, on
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the result page...
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``engine`` :
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Name of the python file used to handle requests and responses to and from this
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search engine.
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``shortcut`` :
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Code used to execute bang requests (in this case using ``!bi``)
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``base_url`` : optional
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Part of the URL that should be stable across every request. Can be useful to
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use multiple sites using only one engine, or updating the site URL without
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touching at the code.
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``send_accept_language_header`` :
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Several engines that support languages (or regions) deal with the HTTP header
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``Accept-Language`` to build a response that fits to the locale. When this
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option is activated, the language (locale) that is selected by the user is used
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to build and send a ``Accept-Language`` header in the request to the origin
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search engine.
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.. _engine categories:
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``categories`` : optional
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Specifies to which categories the engine should be added. Engines can be
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assigned to multiple categories.
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Categories can be shown as tabs (:ref:`settings categories_as_tabs`) in the
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UI. A search in a tab (in the UI) will query all engines that are active in
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this tab. In the preferences page (``/preferences``) -- under *engines* --
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users can select what engine should be active when querying in this tab.
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Alternatively, :ref:`\!bang <search-syntax>` can be used to search all engines
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in a category, regardless of whether they are active or not, or whether they
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are in a tab of the UI or not. For example, ``!dictionaries`` can be used to
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query all search engines in that category (group).
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``timeout`` : optional
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Timeout of the search with the current search engine. Overwrites
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``request_timeout`` from :ref:`settings outgoing`. **Be careful, it will
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modify the global timeout of SearXNG.**
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``api_key`` : optional
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In a few cases, using an API needs the use of a secret key. How to obtain them
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is described in the file.
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``disabled`` : optional
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To disable by default the engine, but not deleting it. It will allow the user
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to manually activate it in the settings.
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``inactive``: optional
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Remove the engine from the settings (*disabled & removed*).
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``language`` : optional
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If you want to use another language for a specific engine, you can define it
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by using the ISO code of language (and region), like ``fr``, ``en-US``,
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``de-DE``.
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``tokens`` : optional
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A list of secret tokens to make this engine *private*, more details see
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:ref:`private engines`.
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``weight`` : default ``1``
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Weighting of the results of this engine.
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``display_error_messages`` : default ``true``
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When an engine returns an error, the message is displayed on the user interface.
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``network`` : optional
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Use the network configuration from another engine.
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In addition, there are two default networks:
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- ``ipv4`` set ``local_addresses`` to ``0.0.0.0`` (use only IPv4 local addresses)
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- ``ipv6`` set ``local_addresses`` to ``::`` (use only IPv6 local addresses)
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``enable_http`` : optional
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Enable HTTP for this engine (by default only HTTPS is enabled).
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``retry_on_http_error`` : optional
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Retry request on some HTTP status code.
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Example:
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* ``true`` : on HTTP status code between 400 and 599.
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* ``403`` : on HTTP status code 403.
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* ``[403, 429]``: on HTTP status code 403 and 429.
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``proxies`` :
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Overwrites proxy settings from :ref:`settings outgoing`.
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``using_tor_proxy`` :
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Using tor proxy (``true``) or not (``false``) for this engine. The default is
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taken from ``using_tor_proxy`` of the :ref:`settings outgoing`.
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.. _Pool limit configuration: https://www.python-httpx.org/advanced/#pool-limit-configuration
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``max_keepalive_connection#s`` :
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`Pool limit configuration`_, overwrites value ``pool_maxsize`` from
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:ref:`settings outgoing` for this engine.
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``max_connections`` :
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`Pool limit configuration`_, overwrites value ``pool_connections`` from
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:ref:`settings outgoing` for this engine.
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``keepalive_expiry`` :
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`Pool limit configuration`_, overwrites value ``keepalive_expiry`` from
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:ref:`settings outgoing` for this engine.
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.. _private engines:
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Private Engines (``tokens``)
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============================
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Administrators might find themselves wanting to limit access to some of the
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enabled engines on their instances. It might be because they do not want to
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expose some private information through :ref:`offline engines`. Or they would
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rather share engines only with their trusted friends or colleagues.
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.. sidebar:: info
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Initial sponsored by `Search and Discovery Fund
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<https://nlnet.nl/discovery>`_ of `NLnet Foundation <https://nlnet.nl/>`_.
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To solve this issue the concept of *private engines* exists.
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A new option was added to engines named `tokens`. It expects a list of strings.
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If the user making a request presents one of the tokens of an engine, they can
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access information about the engine and make search requests.
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Example configuration to restrict access to the Arch Linux Wiki engine:
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.. code:: yaml
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- name: arch linux wiki
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engine: archlinux
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shortcut: al
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tokens: [ 'my-secret-token' ]
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Unless a user has configured the right token, the engine is going to be hidden
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from them. It is not going to be included in the list of engines on the
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Preferences page and in the output of `/config` REST API call.
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Tokens can be added to one's configuration on the Preferences page under "Engine
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tokens". The input expects a comma separated list of strings.
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The distribution of the tokens from the administrator to the users is not carved
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in stone. As providing access to such engines implies that the admin knows and
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trusts the user, we do not see necessary to come up with a strict process.
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Instead, we would like to add guidelines to the documentation of the feature.
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Example: Multilingual Search
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============================
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SearXNG does not support true multilingual search. You have to use the language
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prefix in your search query when searching in a different language.
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But there is a workaround: By adding a new search engine with a different
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language, SearXNG will search in your default and other language.
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Example configuration in settings.yml for a German and English speaker:
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.. code-block:: yaml
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search:
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default_lang : "de"
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...
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engines:
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- name : google english
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engine : google
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language : en
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...
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When searching, the default google engine will return German results and
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"google english" will return English results.
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