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diff --git a/dev/engines/online/duckduckgo.html b/dev/engines/online/duckduckgo.html new file mode 100644 index 000000000..66be3f16e --- /dev/null +++ b/dev/engines/online/duckduckgo.html @@ -0,0 +1,348 @@ +<!DOCTYPE html> + +<html lang="en" data-content_root="../../../"> + <head> + <meta charset="utf-8" /> + <meta name="viewport" content="width=device-width, initial-scale=1.0" /> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <title>DuckDuckGo Engines — SearXNG Documentation (2025.1.6+6dab7fe78)</title> + <link rel="stylesheet" type="text/css" href="../../../_static/pygments.css?v=4f649999" /> + <link rel="stylesheet" type="text/css" href="../../../_static/searxng.css?v=52e4ff28" /> + <script src="../../../_static/documentation_options.js?v=ef740023"></script> + <script src="../../../_static/doctools.js?v=9a2dae69"></script> + <script src="../../../_static/sphinx_highlight.js?v=dc90522c"></script> + <script data-project="searxng" 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Documentation (2025.1.6+6dab7fe78)</a> »</li> + <li class="nav-item nav-item-1"><a href="../../index.html" >Developer documentation</a> »</li> + <li class="nav-item nav-item-2"><a href="../index.html" accesskey="U">Engine Implementations</a> »</li> + <li class="nav-item nav-item-this"><a href="">DuckDuckGo Engines</a></li> + </ul> + </div> + + <div class="document"> + <div class="documentwrapper"> + <div class="bodywrapper"> + <div class="body" role="main"> + + <section id="duckduckgo-engines"> +<span id="id1"></span><h1>DuckDuckGo Engines<a class="headerlink" href="#duckduckgo-engines" title="Link to this heading">¶</a></h1> +<nav class="contents local" id="contents"> +<ul class="simple"> +<li><p><a class="reference internal" href="#duckduckgo-web" id="id2">DuckDuckGo WEB</a></p></li> +<li><p><a class="reference internal" href="#duckduckgo-extra-images-videos-news" id="id3">DuckDuckGo Extra (images, videos, news)</a></p></li> +<li><p><a class="reference internal" href="#duckduckgo-instant-answer-api" id="id4">DuckDuckGo Instant Answer API</a></p></li> +<li><p><a class="reference internal" href="#duckduckgo-weather" id="id5">DuckDuckGo Weather</a></p></li> +</ul> +</nav> +<section id="duckduckgo-web"> +<span id="module-searx.engines.duckduckgo"></span><h2><a class="toc-backref" href="#id2" role="doc-backlink">DuckDuckGo WEB</a><a class="headerlink" href="#duckduckgo-web" title="Link to this heading">¶</a></h2> +</section> +<dl class="py function"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo.cache_vqd"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo.</span></span><span class="sig-name descname"><span class="pre">cache_vqd</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">query</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">region</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">value</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/searx/engines/duckduckgo.html#cache_vqd"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.engines.duckduckgo.cache_vqd" title="Link to this definition">¶</a></dt> +<dd><p>Caches a <code class="docutils literal notranslate"><span class="pre">vqd</span></code> value from a query.</p> +</dd></dl> + +<dl class="py function"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo.fetch_traits"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo.</span></span><span class="sig-name descname"><span class="pre">fetch_traits</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">engine_traits</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="../enginelib.html#searx.enginelib.traits.EngineTraits" title="searx.enginelib.traits.EngineTraits"><span class="pre">EngineTraits</span></a></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/searx/engines/duckduckgo.html#fetch_traits"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.engines.duckduckgo.fetch_traits" title="Link to this definition">¶</a></dt> +<dd><p>Fetch languages & regions from DuckDuckGo.</p> +<p>SearXNG’s <code class="docutils literal notranslate"><span class="pre">all</span></code> locale maps DuckDuckGo’s “Alle regions” (<code class="docutils literal notranslate"><span class="pre">wt-wt</span></code>). +DuckDuckGo’s language “Browsers preferred language” (<code class="docutils literal notranslate"><span class="pre">wt_WT</span></code>) makes no +sense in a SearXNG request since SearXNG’s <code class="docutils literal notranslate"><span class="pre">all</span></code> will not add a +<code class="docutils literal notranslate"><span class="pre">Accept-Language</span></code> HTTP header. The value in <code class="docutils literal notranslate"><span class="pre">engine_traits.all_locale</span></code> +is <code class="docutils literal notranslate"><span class="pre">wt-wt</span></code> (the region).</p> +<p>Beside regions DuckDuckGo also defines its languages by region codes. By +example these are the english languages in DuckDuckGo:</p> +<ul class="simple"> +<li><p>en_US</p></li> +<li><p>en_AU</p></li> +<li><p>en_CA</p></li> +<li><p>en_GB</p></li> +</ul> +<p>The function <a class="reference internal" href="#searx.engines.duckduckgo.get_ddg_lang" title="searx.engines.duckduckgo.get_ddg_lang"><code class="xref py py-obj docutils literal notranslate"><span class="pre">get_ddg_lang</span></code></a> evaluates DuckDuckGo’s language from +SearXNG’s locale.</p> +</dd></dl> + +<dl class="py function"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo.get_ddg_lang"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo.</span></span><span class="sig-name descname"><span class="pre">get_ddg_lang</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">eng_traits</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="../enginelib.html#searx.enginelib.traits.EngineTraits" title="searx.enginelib.traits.EngineTraits"><span class="pre">EngineTraits</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">sxng_locale</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">default</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'en_US'</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/searx/engines/duckduckgo.html#get_ddg_lang"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.engines.duckduckgo.get_ddg_lang" title="Link to this definition">¶</a></dt> +<dd><p>Get DuckDuckGo’s language identifier from SearXNG’s locale.</p> +<p>DuckDuckGo defines its languages by region codes (see +<a class="reference internal" href="#searx.engines.duckduckgo.fetch_traits" title="searx.engines.duckduckgo.fetch_traits"><code class="xref py py-obj docutils literal notranslate"><span class="pre">fetch_traits</span></code></a>).</p> +<p>To get region and language of a DDG service use:</p> +<p>It might confuse, but the <code class="docutils literal notranslate"><span class="pre">l</span></code> value of the cookie is what SearXNG calls +the <em>region</em>:</p> +<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="c1"># !ddi paris :es-AR --> {'ad': 'es_AR', 'ah': 'ar-es', 'l': 'ar-es'}</span> +<span class="n">params</span><span class="p">[</span><span class="s1">'cookies'</span><span class="p">][</span><span class="s1">'ad'</span><span class="p">]</span> <span class="o">=</span> <span class="n">eng_lang</span> +<span class="n">params</span><span class="p">[</span><span class="s1">'cookies'</span><span class="p">][</span><span class="s1">'ah'</span><span class="p">]</span> <span class="o">=</span> <span class="n">eng_region</span> +<span class="n">params</span><span class="p">[</span><span class="s1">'cookies'</span><span class="p">][</span><span class="s1">'l'</span><span class="p">]</span> <span class="o">=</span> <span class="n">eng_region</span> +</pre></div> +</div> +<div class="admonition hint"> +<p class="admonition-title">Hint</p> +<p><a class="reference external" href="https://lite.duckduckgo.com/lite">DDG-lite</a> and the <em>no Javascript</em> +page <a class="reference external" href="https://html.duckduckgo.com/html">https://html.duckduckgo.com/html</a> do not offer a language selection +to the user, only a region can be selected by the user (<code class="docutils literal notranslate"><span class="pre">eng_region</span></code> +from the example above). DDG-lite and <em>no Javascript</em> store the selected +region in a cookie:</p> +<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">params</span><span class="p">[</span><span class="s1">'cookies'</span><span class="p">][</span><span class="s1">'kl'</span><span class="p">]</span> <span class="o">=</span> <span class="n">eng_region</span> <span class="c1"># 'ar-es'</span> +</pre></div> +</div> +</div> +</dd></dl> + +<dl class="py function"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo.get_vqd"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo.</span></span><span class="sig-name descname"><span class="pre">get_vqd</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">query</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">region</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">force_request</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)"><span class="pre">bool</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">False</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/searx/engines/duckduckgo.html#get_vqd"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.engines.duckduckgo.get_vqd" title="Link to this definition">¶</a></dt> +<dd><p>Returns the <code class="docutils literal notranslate"><span class="pre">vqd</span></code> that fits to the <em>query</em>.</p> +<dl class="field-list simple"> +<dt class="field-odd">Parameters<span class="colon">:</span></dt> +<dd class="field-odd"><ul class="simple"> +<li><p><strong>query</strong> – The query term</p></li> +<li><p><strong>region</strong> – DDG’s region code</p></li> +<li><p><strong>force_request</strong> – force a request to get a vqd value from DDG</p></li> +</ul> +</dd> +</dl> +<p>TL;DR; the <code class="docutils literal notranslate"><span class="pre">vqd</span></code> value is needed to pass DDG’s bot protection and is used +by all request to DDG:</p> +<ul class="simple"> +<li><p>DuckDuckGo Lite: <code class="docutils literal notranslate"><span class="pre">https://lite.duckduckgo.com/lite</span></code> (POST form data)</p></li> +<li><p>DuckDuckGo Web: <code class="docutils literal notranslate"><span class="pre">https://links.duckduckgo.com/d.js?q=...&vqd=...</span></code></p></li> +<li><p>DuckDuckGo Images: <code class="docutils literal notranslate"><span class="pre">https://duckduckgo.com/i.js??q=...&vqd=...</span></code></p></li> +<li><p>DuckDuckGo Videos: <code class="docutils literal notranslate"><span class="pre">https://duckduckgo.com/v.js??q=...&vqd=...</span></code></p></li> +<li><p>DuckDuckGo News: <code class="docutils literal notranslate"><span class="pre">https://duckduckgo.com/news.js??q=...&vqd=...</span></code></p></li> +</ul> +<p>DDG’s bot detection is sensitive to the <code class="docutils literal notranslate"><span class="pre">vqd</span></code> value. For some search terms +(such as extremely long search terms that are often sent by bots), no <code class="docutils literal notranslate"><span class="pre">vqd</span></code> +value can be determined.</p> +<p>If SearXNG cannot determine a <code class="docutils literal notranslate"><span class="pre">vqd</span></code> value, then no request should go out +to DDG.</p> +<div class="admonition attention"> +<p class="admonition-title">Attention</p> +<p>A request with a wrong <code class="docutils literal notranslate"><span class="pre">vqd</span></code> value leads to DDG temporarily putting +SearXNG’s IP on a block list.</p> +</div> +<p>Requests from IPs in this block list run into timeouts. Not sure, but it +seems the block list is a sliding window: to get my IP rid from the bot list +I had to cool down my IP for 1h (send no requests from that IP to DDG).</p> +</dd></dl> + +<dl class="py function"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo.is_ddg_captcha"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo.</span></span><span class="sig-name descname"><span class="pre">is_ddg_captcha</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">dom</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/searx/engines/duckduckgo.html#is_ddg_captcha"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.engines.duckduckgo.is_ddg_captcha" title="Link to this definition">¶</a></dt> +<dd><p>In case of CAPTCHA ddg response its own <em>not a Robot</em> dialog and is not +redirected to a CAPTCHA page.</p> +</dd></dl> + +<dl class="py data"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo.send_accept_language_header"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo.</span></span><span class="sig-name descname"><span class="pre">send_accept_language_header</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">True</span></em><a class="headerlink" href="#searx.engines.duckduckgo.send_accept_language_header" title="Link to this definition">¶</a></dt> +<dd><p>DuckDuckGo-Lite tries to guess user’s preferred language from the HTTP +<code class="docutils literal notranslate"><span class="pre">Accept-Language</span></code>. Optional the user can select a region filter (but not a +language).</p> +</dd></dl> + +<section id="duckduckgo-extra-images-videos-news"> +<span id="module-searx.engines.duckduckgo_extra"></span><h2><a class="toc-backref" href="#id3" role="doc-backlink">DuckDuckGo Extra (images, videos, news)</a><a class="headerlink" href="#duckduckgo-extra-images-videos-news" title="Link to this heading">¶</a></h2> +</section> +<dl class="py data"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo_extra.ddg_category"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo_extra.</span></span><span class="sig-name descname"><span class="pre">ddg_category</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">'images'</span></em><a class="headerlink" href="#searx.engines.duckduckgo_extra.ddg_category" title="Link to this definition">¶</a></dt> +<dd><p>The category must be any of <code class="docutils literal notranslate"><span class="pre">images</span></code>, <code class="docutils literal notranslate"><span class="pre">videos</span></code> and <code class="docutils literal notranslate"><span class="pre">news</span></code></p> +</dd></dl> + +<section id="duckduckgo-instant-answer-api"> +<span id="module-searx.engines.duckduckgo_definitions"></span><h2><a class="toc-backref" href="#id4" role="doc-backlink">DuckDuckGo Instant Answer API</a><a class="headerlink" href="#duckduckgo-instant-answer-api" title="Link to this heading">¶</a></h2> +<p>The <a class="reference external" href="https://duckduckgo.com/api">DDG-API</a> is no longer documented but from +reverse engineering we can see that some services (e.g. instant answers) still +in use from the DDG search engine.</p> +<p>As far we can say the <em>instant answers</em> API does not support languages, or at +least we could not find out how language support should work. It seems that +most of the features are based on English terms.</p> +</section> +<dl class="py function"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo_definitions.area_to_str"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo_definitions.</span></span><span class="sig-name descname"><span class="pre">area_to_str</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">area</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/searx/engines/duckduckgo_definitions.html#area_to_str"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.engines.duckduckgo_definitions.area_to_str" title="Link to this definition">¶</a></dt> +<dd><p>parse <code class="docutils literal notranslate"><span class="pre">{'unit':</span> <span class="pre">'https://www.wikidata.org/entity/Q712226',</span> <span class="pre">'amount':</span> <span class="pre">'+20.99'}</span></code></p> +</dd></dl> + +<dl class="py function"> +<dt class="sig sig-object py" id="searx.engines.duckduckgo_definitions.is_broken_text"> +<span class="sig-prename descclassname"><span class="pre">searx.engines.duckduckgo_definitions.</span></span><span class="sig-name descname"><span class="pre">is_broken_text</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">text</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/searx/engines/duckduckgo_definitions.html#is_broken_text"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.engines.duckduckgo_definitions.is_broken_text" title="Link to this definition">¶</a></dt> +<dd><p>duckduckgo may return something like <code class="docutils literal notranslate"><span class="pre"><a</span> <span class="pre">href="xxxx">http://somewhere</span> <span class="pre">Related</span> <span class="pre">website<a/></span></code></p> +<p>The href URL is broken, the “Related website” may contains some HTML.</p> +<p>The best solution seems to ignore these results.</p> +</dd></dl> + +<section id="duckduckgo-weather"> +<span id="module-searx.engines.duckduckgo_weather"></span><h2><a class="toc-backref" href="#id5" role="doc-backlink">DuckDuckGo Weather</a><a class="headerlink" href="#duckduckgo-weather" title="Link to this heading">¶</a></h2> +</section> +</section> + + + <div class="clearer"></div> + </div> + </div> + </div> + <span id="sidebar-top"></span> + <div class="sphinxsidebar" role="navigation" aria-label="Main"> + <div class="sphinxsidebarwrapper"> + + + <p class="logo"><a href="../../../index.html"> + <img class="logo" src="../../../_static/searxng-wordmark.svg" alt="Logo of SearXNG"/> + </a></p> + + +<h3><a href="../../../index.html">Table of Contents</a></h3> +<ul class="current"> +<li class="toctree-l1"><a class="reference internal" href="../../../user/index.html">User information</a></li> +<li class="toctree-l1"><a class="reference internal" href="../../../own-instance.html">Why use a private instance?</a></li> +<li class="toctree-l1"><a class="reference internal" href="../../../admin/index.html">Administrator documentation</a></li> +<li class="toctree-l1 current"><a class="reference internal" href="../../index.html">Developer documentation</a><ul class="current"> +<li class="toctree-l2"><a class="reference internal" href="../../quickstart.html">Development Quickstart</a></li> +<li class="toctree-l2"><a class="reference internal" href="../../rtm_asdf.html">Runtime Management</a></li> +<li class="toctree-l2"><a class="reference internal" href="../../contribution_guide.html">How to contribute</a></li> +<li class="toctree-l2 current"><a class="reference internal" href="../index.html">Engine Implementations</a><ul class="current"> +<li 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