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<h1>Source code for searx.enginelib</h1><div class="highlight"><pre>
<span></span><span class="c1"># SPDX-License-Identifier: AGPL-3.0-or-later</span>
<span class="sd">"""Implementations of the framework for the SearXNG engines.</span>
<span class="sd">.. hint::</span>
<span class="sd"> The long term goal is to modularize all implementations of the engine</span>
<span class="sd"> framework here in this Python package. ToDo:</span>
<span class="sd"> - move implementations of the :ref:`searx.engines loader` to a new module in</span>
<span class="sd"> the :py:obj:`searx.enginelib` namespace.</span>
<span class="sd">"""</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">annotations</span>
<span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">List</span><span class="p">,</span> <span class="n">Callable</span><span class="p">,</span> <span class="n">TYPE_CHECKING</span>
<span class="k">if</span> <span class="n">TYPE_CHECKING</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">searx.enginelib</span> <span class="kn">import</span> <span class="n">traits</span>
<div class="viewcode-block" id="Engine">
<a class="viewcode-back" href="../../dev/engines/enginelib.html#searx.enginelib.Engine">[docs]</a>
<span class="k">class</span> <span class="nc">Engine</span><span class="p">:</span> <span class="c1"># pylint: disable=too-few-public-methods</span>
<span class="w"> </span><span class="sd">"""Class of engine instances build from YAML settings.</span>
<span class="sd"> Further documentation see :ref:`general engine configuration`.</span>
<span class="sd"> .. hint::</span>
<span class="sd"> This class is currently never initialized and only used for type hinting.</span>
<span class="sd"> """</span>
<span class="c1"># Common options in the engine module</span>
<span class="n">engine_type</span><span class="p">:</span> <span class="nb">str</span>
<span class="w"> </span><span class="sd">"""Type of the engine (:ref:`searx.search.processors`)"""</span>
<span class="n">paging</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""Engine supports multiple pages."""</span>
<span class="n">time_range_support</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""Engine supports search time range."""</span>
<span class="n">safesearch</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""Engine supports SafeSearch"""</span>
<span class="n">language_support</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""Engine supports languages (locales) search."""</span>
<span class="n">language</span><span class="p">:</span> <span class="nb">str</span>
<span class="w"> </span><span class="sd">"""For an engine, when there is ``language: ...`` in the YAML settings the engine</span>
<span class="sd"> does support only this one language:</span>
<span class="sd"> .. code:: yaml</span>
<span class="sd"> - name: google french</span>
<span class="sd"> engine: google</span>
<span class="sd"> language: fr</span>
<span class="sd"> """</span>
<span class="n">region</span><span class="p">:</span> <span class="nb">str</span>
<span class="w"> </span><span class="sd">"""For an engine, when there is ``region: ...`` in the YAML settings the engine</span>
<span class="sd"> does support only this one region::</span>
<span class="sd"> .. code:: yaml</span>
<span class="sd"> - name: google belgium</span>
<span class="sd"> engine: google</span>
<span class="sd"> region: fr-BE</span>
<span class="sd"> """</span>
<span class="n">fetch_traits</span><span class="p">:</span> <span class="n">Callable</span>
<span class="w"> </span><span class="sd">"""Function to to fetch engine's traits from origin."""</span>
<span class="n">traits</span><span class="p">:</span> <span class="n">traits</span><span class="o">.</span><span class="n">EngineTraits</span>
<span class="w"> </span><span class="sd">"""Traits of the engine."""</span>
<span class="c1"># settings.yml</span>
<span class="n">categories</span><span class="p">:</span> <span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span>
<span class="w"> </span><span class="sd">"""Specifies to which :ref:`engine categories` the engine should be added."""</span>
<span class="n">name</span><span class="p">:</span> <span class="nb">str</span>
<span class="w"> </span><span class="sd">"""Name that will be used across SearXNG to define this engine. In settings, on</span>
<span class="sd"> the result page .."""</span>
<span class="n">engine</span><span class="p">:</span> <span class="nb">str</span>
<span class="w"> </span><span class="sd">"""Name of the python file used to handle requests and responses to and from</span>
<span class="sd"> this search engine (file name from :origin:`searx/engines` without</span>
<span class="sd"> ``.py``)."""</span>
<span class="n">enable_http</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""Enable HTTP (by default only HTTPS is enabled)."""</span>
<span class="n">shortcut</span><span class="p">:</span> <span class="nb">str</span>
<span class="w"> </span><span class="sd">"""Code used to execute bang requests (``!foo``)"""</span>
<span class="n">timeout</span><span class="p">:</span> <span class="nb">float</span>
<span class="w"> </span><span class="sd">"""Specific timeout for search-engine."""</span>
<span class="n">display_error_messages</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""Display error messages on the web UI."""</span>
<span class="n">proxies</span><span class="p">:</span> <span class="nb">dict</span>
<span class="w"> </span><span class="sd">"""Set proxies for a specific engine (YAML):</span>
<span class="sd"> .. code:: yaml</span>
<span class="sd"> proxies :</span>
<span class="sd"> http: socks5://proxy:port</span>
<span class="sd"> https: socks5://proxy:port</span>
<span class="sd"> """</span>
<span class="n">disabled</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""To disable by default the engine, but not deleting it. It will allow the</span>
<span class="sd"> user to manually activate it in the settings."""</span>
<span class="n">inactive</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""Remove the engine from the settings (*disabled & removed*)."""</span>
<span class="n">about</span><span class="p">:</span> <span class="nb">dict</span>
<span class="w"> </span><span class="sd">"""Additional fields describing the engine.</span>
<span class="sd"> .. code:: yaml</span>
<span class="sd"> about:</span>
<span class="sd"> website: https://example.com</span>
<span class="sd"> wikidata_id: Q306656</span>
<span class="sd"> official_api_documentation: https://example.com/api-doc</span>
<span class="sd"> use_official_api: true</span>
<span class="sd"> require_api_key: true</span>
<span class="sd"> results: HTML</span>
<span class="sd"> """</span>
<span class="n">using_tor_proxy</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""Using tor proxy (``true``) or not (``false``) for this engine."""</span>
<span class="n">send_accept_language_header</span><span class="p">:</span> <span class="nb">bool</span>
<span class="w"> </span><span class="sd">"""When this option is activated, the language (locale) that is selected by</span>
<span class="sd"> the user is used to build and send a ``Accept-Language`` header in the</span>
<span class="sd"> request to the origin search engine."""</span>
<span class="n">tokens</span><span class="p">:</span> <span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span>
<span class="w"> </span><span class="sd">"""A list of secret tokens to make this engine *private*, more details see</span>
<span class="sd"> :ref:`private engines`."""</span></div>
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