src/searx.botdetection.html


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  <section id="bot-detection">
<span id="botdetection"></span><h1>Bot Detection<a class="headerlink" href="#bot-detection" title="Link to this heading">¶</a></h1>
<nav class="contents local" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#module-searx.botdetection.ip_lists" id="id4">IP lists</a></p>
<ul>
<li><p><a class="reference internal" href="#method-ip-lists" id="id5">Method <code class="docutils literal notranslate"><span class="pre">ip_lists</span></code></a></p></li>
</ul>
</li>
<li><p><a class="reference internal" href="#module-searx.botdetection.ip_limit" id="id6">Rate limit</a></p>
<ul>
<li><p><a class="reference internal" href="#method-ip-limit" id="id7">Method <code class="docutils literal notranslate"><span class="pre">ip_limit</span></code></a></p></li>
<li><p><a class="reference internal" href="#method-link-token" id="id8">Method <code class="docutils literal notranslate"><span class="pre">link_token</span></code></a></p></li>
</ul>
</li>
<li><p><a class="reference internal" href="#module-searx.botdetection.http_accept" id="id9">Probe HTTP headers</a></p>
<ul>
<li><p><a class="reference internal" href="#method-http-accept" id="id10">Method <code class="docutils literal notranslate"><span class="pre">http_accept</span></code></a></p></li>
<li><p><a class="reference internal" href="#method-http-accept-encoding" id="id11">Method <code class="docutils literal notranslate"><span class="pre">http_accept_encoding</span></code></a></p></li>
<li><p><a class="reference internal" href="#method-http-accept-language" id="id12">Method <code class="docutils literal notranslate"><span class="pre">http_accept_language</span></code></a></p></li>
<li><p><a class="reference internal" href="#method-http-connection" id="id13">Method <code class="docutils literal notranslate"><span class="pre">http_connection</span></code></a></p></li>
<li><p><a class="reference internal" href="#method-http-user-agent" id="id14">Method <code class="docutils literal notranslate"><span class="pre">http_user_agent</span></code></a></p></li>
</ul>
</li>
<li><p><a class="reference internal" href="#module-searx.botdetection.config" id="id15">Config</a></p></li>
</ul>
</nav>
<p id="botdetection-src"><span id="module-searx.botdetection"></span>Implementations used for bot detection.</p>
<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.get_network">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.</span></span><span class="sig-name descname"><span class="pre">get_network</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">real_ip</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/ipaddress.html#ipaddress.IPv4Address" title="(in Python v3.13)"><span class="pre">IPv4Address</span></a><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv6Address" title="(in Python v3.13)"><span class="pre">IPv6Address</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">cfg</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="#searx.botdetection.config.Config" title="searx.botdetection.config.Config"><span class="pre">Config</span></a></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv4Network" title="(in Python v3.13)"><span class="pre">IPv4Network</span></a><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv6Network" title="(in Python v3.13)"><span class="pre">IPv6Network</span></a></span></span><a class="reference internal" href="../_modules/searx/botdetection/_helpers.html#get_network"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.get_network" title="Link to this definition">¶</a></dt>
<dd><p>Returns the (client) network of whether the real_ip is part of.</p>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.get_real_ip">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.</span></span><span class="sig-name descname"><span class="pre">get_real_ip</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">request</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://flask.palletsprojects.com/en/stable/api/#flask.Request" title="(in Flask v3.1.x)"><span class="pre">Request</span></a></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><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></span><a class="reference internal" href="../_modules/searx/botdetection/_helpers.html#get_real_ip"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.get_real_ip" title="Link to this definition">¶</a></dt>
<dd><p>Returns real IP of the request.  Since not all proxies set all the HTTP
headers and incoming headers can be faked it may happen that the IP cannot
be determined correctly.</p>
<aside class="sidebar">
<p class="sidebar-title"><a class="reference external" href="https://flask.palletsprojects.com/en/stable/api/#flask.Request.remote_addr" title="(in Flask v3.1.x)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">flask.Request.remote_addr</span></code></a></p>
<p>SearXNG uses Werkzeug’s <a class="reference external" href="https://werkzeug.palletsprojects.com/middleware/proxy_fix/">ProxyFix</a> (with it default <code class="docutils literal notranslate"><span class="pre">x_for=1</span></code>).</p>
</aside>
<p>This function tries to get the remote IP in the order listed below,
additional some tests are done and if inconsistencies or errors are
detected, they are logged.</p>
<p>The remote IP of the request is taken from (first match):</p>
<ul class="simple">
<li><p><a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For">X-Forwarded-For</a> header</p></li>
<li><p><a class="reference external" href="https://github.com/searxng/searxng/issues/1237#issuecomment-1147564516">X-real-IP header</a></p></li>
<li><p><a class="reference external" href="https://flask.palletsprojects.com/en/stable/api/#flask.Request.remote_addr" title="(in Flask v3.1.x)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">flask.Request.remote_addr</span></code></a></p></li>
</ul>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.too_many_requests">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.</span></span><span class="sig-name descname"><span class="pre">too_many_requests</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">network</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/ipaddress.html#ipaddress.IPv4Network" title="(in Python v3.13)"><span class="pre">IPv4Network</span></a><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv6Network" title="(in Python v3.13)"><span class="pre">IPv6Network</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">log_msg</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> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><span class="pre">Response</span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.13)"><span class="pre">None</span></a></span></span><a class="reference internal" href="../_modules/searx/botdetection/_helpers.html#too_many_requests"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.too_many_requests" title="Link to this definition">¶</a></dt>
<dd><p>Returns a HTTP 429 response object and writes a ERROR message to the
‘botdetection’ logger.  This function is used in part by the filter methods
to return the default <code class="docutils literal notranslate"><span class="pre">Too</span> <span class="pre">Many</span> <span class="pre">Requests</span></code> response.</p>
</dd></dl>

<section id="module-searx.botdetection.ip_lists">
<span id="ip-lists"></span><span id="botdetection-ip-lists"></span><h2><a class="toc-backref" href="#id4" role="doc-backlink">IP lists</a><a class="headerlink" href="#module-searx.botdetection.ip_lists" title="Link to this heading">¶</a></h2>
<section id="method-ip-lists">
<span id="id1"></span><h3><a class="toc-backref" href="#id5" role="doc-backlink">Method <code class="docutils literal notranslate"><span class="pre">ip_lists</span></code></a><a class="headerlink" href="#method-ip-lists" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">ip_lists</span></code> method implements IP <a class="reference internal" href="#searx.botdetection.ip_lists.block_ip" title="searx.botdetection.ip_lists.block_ip"><code class="xref py py-obj docutils literal notranslate"><span class="pre">block-</span></code></a> and
<a class="reference internal" href="#searx.botdetection.ip_lists.pass_ip" title="searx.botdetection.ip_lists.pass_ip"><code class="xref py py-obj docutils literal notranslate"><span class="pre">pass-lists</span></code></a>.</p>
<div class="highlight-toml notranslate"><div class="highlight"><pre><span></span><span class="k">[botdetection.ip_lists]</span>

<span class="n">pass_ip</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s1">&#39;167.235.158.251&#39;</span><span class="p">,</span><span class="w"> </span><span class="c1"># IPv4 of check.searx.space</span>
<span class="w"> </span><span class="s1">&#39;192.168.0.0/16&#39;</span><span class="p">,</span><span class="w">  </span><span class="c1"># IPv4 private network</span>
<span class="w"> </span><span class="s1">&#39;fe80::/10&#39;</span><span class="w">        </span><span class="c1"># IPv6 linklocal</span>
<span class="p">]</span>
<span class="n">block_ip</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[</span>
<span class="w">   </span><span class="s1">&#39;93.184.216.34&#39;</span><span class="p">,</span><span class="w"> </span><span class="c1"># IPv4 of example.org</span>
<span class="w">   </span><span class="s1">&#39;257.1.1.1&#39;</span><span class="p">,</span><span class="w">     </span><span class="c1"># invalid IP --&gt; will be ignored, logged in ERROR class</span>
<span class="p">]</span>
</pre></div>
</div>
</section>
<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.ip_lists.block_ip">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_lists.</span></span><span class="sig-name descname"><span class="pre">block_ip</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">real_ip</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/ipaddress.html#ipaddress.IPv4Address" title="(in Python v3.13)"><span class="pre">IPv4Address</span></a><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv6Address" title="(in Python v3.13)"><span class="pre">IPv6Address</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">cfg</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="#searx.botdetection.config.Config" title="searx.botdetection.config.Config"><span class="pre">Config</span></a></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Tuple" title="(in Python v3.13)"><span class="pre">Tuple</span></a><span class="p"><span class="pre">[</span></span><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 class="p"><span class="pre">,</span></span><span class="w"> </span><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 class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="../_modules/searx/botdetection/ip_lists.html#block_ip"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.ip_lists.block_ip" title="Link to this definition">¶</a></dt>
<dd><p>Checks if the IP on the subnet is in one of the members of the
<code class="docutils literal notranslate"><span class="pre">botdetection.ip_lists.block_ip</span></code> list.</p>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.ip_lists.pass_ip">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_lists.</span></span><span class="sig-name descname"><span class="pre">pass_ip</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">real_ip</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/ipaddress.html#ipaddress.IPv4Address" title="(in Python v3.13)"><span class="pre">IPv4Address</span></a><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv6Address" title="(in Python v3.13)"><span class="pre">IPv6Address</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">cfg</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="#searx.botdetection.config.Config" title="searx.botdetection.config.Config"><span class="pre">Config</span></a></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Tuple" title="(in Python v3.13)"><span class="pre">Tuple</span></a><span class="p"><span class="pre">[</span></span><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 class="p"><span class="pre">,</span></span><span class="w"> </span><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 class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="../_modules/searx/botdetection/ip_lists.html#pass_ip"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.ip_lists.pass_ip" title="Link to this definition">¶</a></dt>
<dd><p>Checks if the IP on the subnet is in one of the members of the
<code class="docutils literal notranslate"><span class="pre">botdetection.ip_lists.pass_ip</span></code> list.</p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_lists.SEARXNG_ORG">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_lists.</span></span><span class="sig-name descname"><span class="pre">SEARXNG_ORG</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">['167.235.158.251',</span> <span class="pre">'2a01:04f8:1c1c:8fc2::/64']</span></em><a class="headerlink" href="#searx.botdetection.ip_lists.SEARXNG_ORG" title="Link to this definition">¶</a></dt>
<dd><p>Passlist of IPs from the SearXNG organization, e.g. <cite>check.searx.space</cite>.</p>
</dd></dl>

</section>
<section id="module-searx.botdetection.ip_limit">
<span id="rate-limit"></span><span id="botdetection-rate-limit"></span><h2><a class="toc-backref" href="#id6" role="doc-backlink">Rate limit</a><a class="headerlink" href="#module-searx.botdetection.ip_limit" title="Link to this heading">¶</a></h2>
<section id="method-ip-limit">
<span id="botdetection-ip-limit"></span><h3><a class="toc-backref" href="#id7" role="doc-backlink">Method <code class="docutils literal notranslate"><span class="pre">ip_limit</span></code></a><a class="headerlink" href="#method-ip-limit" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">ip_limit</span></code> method counts request from an IP in <em>sliding windows</em>.  If
there are to many requests in a sliding window, the request is evaluated as a
bot request.  This method requires a redis DB and needs a HTTP <a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For">X-Forwarded-For</a>
header.  To take privacy only the hash value of an IP is stored in the redis DB
and at least for a maximum of 10 minutes.</p>
<p>The <a class="reference internal" href="#module-searx.botdetection.link_token" title="searx.botdetection.link_token"><code class="xref py py-obj docutils literal notranslate"><span class="pre">link_token</span></code></a> method can be used to investigate whether a request is
<em>suspicious</em>.  To activate the <a class="reference internal" href="#module-searx.botdetection.link_token" title="searx.botdetection.link_token"><code class="xref py py-obj docutils literal notranslate"><span class="pre">link_token</span></code></a> method in the
<a class="reference internal" href="#module-searx.botdetection.ip_limit" title="searx.botdetection.ip_limit"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ip_limit</span></code></a> method add the following configuration:</p>
<div class="highlight-toml notranslate"><div class="highlight"><pre><span></span><span class="k">[botdetection.ip_limit]</span>
<span class="n">link_token</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kc">true</span>
</pre></div>
</div>
<p>If the <a class="reference internal" href="#module-searx.botdetection.link_token" title="searx.botdetection.link_token"><code class="xref py py-obj docutils literal notranslate"><span class="pre">link_token</span></code></a> method is activated and a request is <em>suspicious</em>
the request rates are reduced:</p>
<ul class="simple">
<li><p><a class="reference internal" href="#searx.botdetection.ip_limit.BURST_MAX" title="searx.botdetection.ip_limit.BURST_MAX"><code class="xref py py-obj docutils literal notranslate"><span class="pre">BURST_MAX</span></code></a> -&gt; <a class="reference internal" href="#searx.botdetection.ip_limit.BURST_MAX_SUSPICIOUS" title="searx.botdetection.ip_limit.BURST_MAX_SUSPICIOUS"><code class="xref py py-obj docutils literal notranslate"><span class="pre">BURST_MAX_SUSPICIOUS</span></code></a></p></li>
<li><p><a class="reference internal" href="#searx.botdetection.ip_limit.LONG_MAX" title="searx.botdetection.ip_limit.LONG_MAX"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LONG_MAX</span></code></a> -&gt; <a class="reference internal" href="#searx.botdetection.ip_limit.LONG_MAX_SUSPICIOUS" title="searx.botdetection.ip_limit.LONG_MAX_SUSPICIOUS"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LONG_MAX_SUSPICIOUS</span></code></a></p></li>
</ul>
<p>To intercept bots that get their IPs from a range of IPs, there is a
<a class="reference internal" href="#searx.botdetection.ip_limit.SUSPICIOUS_IP_WINDOW" title="searx.botdetection.ip_limit.SUSPICIOUS_IP_WINDOW"><code class="xref py py-obj docutils literal notranslate"><span class="pre">SUSPICIOUS_IP_WINDOW</span></code></a>.  In this window the suspicious IPs are stored
for a longer time.  IPs stored in this sliding window have a maximum of
<a class="reference internal" href="#searx.botdetection.ip_limit.SUSPICIOUS_IP_MAX" title="searx.botdetection.ip_limit.SUSPICIOUS_IP_MAX"><code class="xref py py-obj docutils literal notranslate"><span class="pre">SUSPICIOUS_IP_MAX</span></code></a> accesses before they are blocked.  As soon as the IP
makes a request that is not suspicious, the sliding window for this IP is
dropped.</p>
</section>
<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.API_MAX">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">API_MAX</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">4</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.API_MAX" title="Link to this definition">¶</a></dt>
<dd><p>Maximum requests from one IP in the <a class="reference internal" href="#searx.botdetection.ip_limit.API_WINDOW" title="searx.botdetection.ip_limit.API_WINDOW"><code class="xref py py-obj docutils literal notranslate"><span class="pre">API_WINDOW</span></code></a></p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.API_WINDOW">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">API_WINDOW</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">3600</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.API_WINDOW" title="Link to this definition">¶</a></dt>
<dd><p>Time (sec) before sliding window for API requests (format != html) expires.</p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.BURST_MAX">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">BURST_MAX</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">15</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.BURST_MAX" title="Link to this definition">¶</a></dt>
<dd><p>Maximum requests from one IP in the <a class="reference internal" href="#searx.botdetection.ip_limit.BURST_WINDOW" title="searx.botdetection.ip_limit.BURST_WINDOW"><code class="xref py py-obj docutils literal notranslate"><span class="pre">BURST_WINDOW</span></code></a></p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.BURST_MAX_SUSPICIOUS">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">BURST_MAX_SUSPICIOUS</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">2</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.BURST_MAX_SUSPICIOUS" title="Link to this definition">¶</a></dt>
<dd><p>Maximum of suspicious requests from one IP in the <a class="reference internal" href="#searx.botdetection.ip_limit.BURST_WINDOW" title="searx.botdetection.ip_limit.BURST_WINDOW"><code class="xref py py-obj docutils literal notranslate"><span class="pre">BURST_WINDOW</span></code></a></p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.BURST_WINDOW">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">BURST_WINDOW</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">20</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.BURST_WINDOW" title="Link to this definition">¶</a></dt>
<dd><p>Time (sec) before sliding window for <em>burst</em> requests expires.</p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.LONG_MAX">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">LONG_MAX</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">150</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.LONG_MAX" title="Link to this definition">¶</a></dt>
<dd><p>Maximum requests from one IP in the <a class="reference internal" href="#searx.botdetection.ip_limit.LONG_WINDOW" title="searx.botdetection.ip_limit.LONG_WINDOW"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LONG_WINDOW</span></code></a></p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.LONG_MAX_SUSPICIOUS">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">LONG_MAX_SUSPICIOUS</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">10</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.LONG_MAX_SUSPICIOUS" title="Link to this definition">¶</a></dt>
<dd><p>Maximum suspicious requests from one IP in the <a class="reference internal" href="#searx.botdetection.ip_limit.LONG_WINDOW" title="searx.botdetection.ip_limit.LONG_WINDOW"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LONG_WINDOW</span></code></a></p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.LONG_WINDOW">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">LONG_WINDOW</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">600</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.LONG_WINDOW" title="Link to this definition">¶</a></dt>
<dd><p>Time (sec) before the longer sliding window expires.</p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.SUSPICIOUS_IP_MAX">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">SUSPICIOUS_IP_MAX</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">3</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.SUSPICIOUS_IP_MAX" title="Link to this definition">¶</a></dt>
<dd><p>Maximum requests from one suspicious IP in the <a class="reference internal" href="#searx.botdetection.ip_limit.SUSPICIOUS_IP_WINDOW" title="searx.botdetection.ip_limit.SUSPICIOUS_IP_WINDOW"><code class="xref py py-obj docutils literal notranslate"><span class="pre">SUSPICIOUS_IP_WINDOW</span></code></a>.</p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.ip_limit.SUSPICIOUS_IP_WINDOW">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.ip_limit.</span></span><span class="sig-name descname"><span class="pre">SUSPICIOUS_IP_WINDOW</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">2592000</span></em><a class="headerlink" href="#searx.botdetection.ip_limit.SUSPICIOUS_IP_WINDOW" title="Link to this definition">¶</a></dt>
<dd><p>Time (sec) before sliding window for one suspicious IP expires.</p>
</dd></dl>

<section id="method-link-token">
<span id="module-searx.botdetection.link_token"></span><h3><a class="toc-backref" href="#id8" role="doc-backlink">Method <code class="docutils literal notranslate"><span class="pre">link_token</span></code></a><a class="headerlink" href="#method-link-token" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">link_token</span></code> method evaluates a request as <a class="reference internal" href="#searx.botdetection.link_token.is_suspicious" title="searx.botdetection.link_token.is_suspicious"><code class="xref py py-obj docutils literal notranslate"><span class="pre">suspicious</span></code></a> if the URL <code class="docutils literal notranslate"><span class="pre">/client&lt;token&gt;.css</span></code> is not requested by the
client.  By adding a random component (the token) in the URL, a bot can not send
a ping by request a static URL.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>This method requires a redis DB and needs a HTTP <a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For">X-Forwarded-For</a> header.</p>
</div>
<p>To get in use of this method a flask URL route needs to be added:</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="nd">@app</span><span class="o">.</span><span class="n">route</span><span class="p">(</span><span class="s1">&#39;/client&lt;token&gt;.css&#39;</span><span class="p">,</span> <span class="n">methods</span><span class="o">=</span><span class="p">[</span><span class="s1">&#39;GET&#39;</span><span class="p">,</span> <span class="s1">&#39;POST&#39;</span><span class="p">])</span>
<span class="k">def</span> <span class="nf">client_token</span><span class="p">(</span><span class="n">token</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    <span class="n">link_token</span><span class="o">.</span><span class="n">ping</span><span class="p">(</span><span class="n">request</span><span class="p">,</span> <span class="n">token</span><span class="p">)</span>
    <span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">,</span> <span class="n">mimetype</span><span class="o">=</span><span class="s1">&#39;text/css&#39;</span><span class="p">)</span>
</pre></div>
</div>
<p>And in the HTML template from flask a stylesheet link is needed (the value of
<code class="docutils literal notranslate"><span class="pre">link_token</span></code> comes from <a class="reference internal" href="#searx.botdetection.link_token.get_token" title="searx.botdetection.link_token.get_token"><code class="xref py py-obj docutils literal notranslate"><span class="pre">get_token</span></code></a>):</p>
<div class="highlight-html notranslate"><div class="highlight"><pre><span></span><span class="p">&lt;</span><span class="nt">link</span> <span class="na">rel</span><span class="o">=</span><span class="s">&quot;stylesheet&quot;</span>
      <span class="na">href</span><span class="o">=</span><span class="s">&quot;{{ url_for(&#39;client_token&#39;, token=link_token) }}&quot;</span>
      <span class="na">type</span><span class="o">=</span><span class="s">&quot;text/css&quot;</span> <span class="p">&gt;</span>
</pre></div>
</div>
</section>
<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.link_token.get_ping_key">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.link_token.</span></span><span class="sig-name descname"><span class="pre">get_ping_key</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">network</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/ipaddress.html#ipaddress.IPv4Network" title="(in Python v3.13)"><span class="pre">IPv4Network</span></a><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv6Network" title="(in Python v3.13)"><span class="pre">IPv6Network</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">request</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://flask.palletsprojects.com/en/stable/api/#flask.Request" title="(in Flask v3.1.x)"><span class="pre">Request</span></a></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><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></span><a class="reference internal" href="../_modules/searx/botdetection/link_token.html#get_ping_key"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.link_token.get_ping_key" title="Link to this definition">¶</a></dt>
<dd><p>Generates a hashed key that fits (more or less) to a <em>WEB-browser
session</em> in a network.</p>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.link_token.get_token">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.link_token.</span></span><span class="sig-name descname"><span class="pre">get_token</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><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></span><a class="reference internal" href="../_modules/searx/botdetection/link_token.html#get_token"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.link_token.get_token" title="Link to this definition">¶</a></dt>
<dd><p>Returns current token.  If there is no currently active token a new token
is generated randomly and stored in the redis DB.</p>
<ul class="simple">
<li><p><a class="reference internal" href="#searx.botdetection.link_token.TOKEN_LIVE_TIME" title="searx.botdetection.link_token.TOKEN_LIVE_TIME"><code class="xref py py-obj docutils literal notranslate"><span class="pre">TOKEN_LIVE_TIME</span></code></a></p></li>
<li><p><a class="reference internal" href="#searx.botdetection.link_token.TOKEN_KEY" title="searx.botdetection.link_token.TOKEN_KEY"><code class="xref py py-obj docutils literal notranslate"><span class="pre">TOKEN_KEY</span></code></a></p></li>
</ul>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.link_token.is_suspicious">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.link_token.</span></span><span class="sig-name descname"><span class="pre">is_suspicious</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">network</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/ipaddress.html#ipaddress.IPv4Network" title="(in Python v3.13)"><span class="pre">IPv4Network</span></a><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv6Network" title="(in Python v3.13)"><span class="pre">IPv6Network</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">request</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://flask.palletsprojects.com/en/stable/api/#flask.Request" title="(in Flask v3.1.x)"><span class="pre">Request</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">renew</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/botdetection/link_token.html#is_suspicious"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.link_token.is_suspicious" title="Link to this definition">¶</a></dt>
<dd><p>Checks whether a valid ping is exists for this (client) network, if not
this request is rated as <em>suspicious</em>.  If a valid ping exists and argument
<code class="docutils literal notranslate"><span class="pre">renew</span></code> is <code class="docutils literal notranslate"><span class="pre">True</span></code> the expire time of this ping is reset to
<a class="reference internal" href="#searx.botdetection.link_token.PING_LIVE_TIME" title="searx.botdetection.link_token.PING_LIVE_TIME"><code class="xref py py-obj docutils literal notranslate"><span class="pre">PING_LIVE_TIME</span></code></a>.</p>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="searx.botdetection.link_token.ping">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.link_token.</span></span><span class="sig-name descname"><span class="pre">ping</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">request</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://flask.palletsprojects.com/en/stable/api/#flask.Request" title="(in Flask v3.1.x)"><span class="pre">Request</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">token</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/botdetection/link_token.html#ping"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.link_token.ping" title="Link to this definition">¶</a></dt>
<dd><p>This function is called by a request to URL <code class="docutils literal notranslate"><span class="pre">/client&lt;token&gt;.css</span></code>.  If
<code class="docutils literal notranslate"><span class="pre">token</span></code> is valid a <a class="reference internal" href="#searx.botdetection.link_token.PING_KEY" title="searx.botdetection.link_token.PING_KEY"><code class="xref py py-obj docutils literal notranslate"><span class="pre">PING_KEY</span></code></a> for the client is stored in the DB.
The expire time of this ping-key is <a class="reference internal" href="#searx.botdetection.link_token.PING_LIVE_TIME" title="searx.botdetection.link_token.PING_LIVE_TIME"><code class="xref py py-obj docutils literal notranslate"><span class="pre">PING_LIVE_TIME</span></code></a>.</p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.link_token.PING_KEY">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.link_token.</span></span><span class="sig-name descname"><span class="pre">PING_KEY</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">'SearXNG_limiter.ping'</span></em><a class="headerlink" href="#searx.botdetection.link_token.PING_KEY" title="Link to this definition">¶</a></dt>
<dd><p>Prefix of all ping-keys generated by <a class="reference internal" href="#searx.botdetection.link_token.get_ping_key" title="searx.botdetection.link_token.get_ping_key"><code class="xref py py-obj docutils literal notranslate"><span class="pre">get_ping_key</span></code></a></p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.link_token.PING_LIVE_TIME">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.link_token.</span></span><span class="sig-name descname"><span class="pre">PING_LIVE_TIME</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">3600</span></em><a class="headerlink" href="#searx.botdetection.link_token.PING_LIVE_TIME" title="Link to this definition">¶</a></dt>
<dd><p>Lifetime (sec) of the ping-key from a client (request)</p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.link_token.TOKEN_KEY">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.link_token.</span></span><span class="sig-name descname"><span class="pre">TOKEN_KEY</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">'SearXNG_limiter.token'</span></em><a class="headerlink" href="#searx.botdetection.link_token.TOKEN_KEY" title="Link to this definition">¶</a></dt>
<dd><p>Key for which the current token is stored in the DB</p>
</dd></dl>

<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.link_token.TOKEN_LIVE_TIME">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.link_token.</span></span><span class="sig-name descname"><span class="pre">TOKEN_LIVE_TIME</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">600</span></em><a class="headerlink" href="#searx.botdetection.link_token.TOKEN_LIVE_TIME" title="Link to this definition">¶</a></dt>
<dd><p>Lifetime (sec) of limiter’s CSS token.</p>
</dd></dl>

</section>
<section id="module-searx.botdetection.http_accept">
<span id="probe-http-headers"></span><span id="botdetection-probe-headers"></span><h2><a class="toc-backref" href="#id9" role="doc-backlink">Probe HTTP headers</a><a class="headerlink" href="#module-searx.botdetection.http_accept" title="Link to this heading">¶</a></h2>
<section id="method-http-accept">
<h3><a class="toc-backref" href="#id10" role="doc-backlink">Method <code class="docutils literal notranslate"><span class="pre">http_accept</span></code></a><a class="headerlink" href="#method-http-accept" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">http_accept</span></code> method evaluates a request as the request of a bot if the
<a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept">Accept</a> header ..</p>
<ul class="simple">
<li><p>did not contain <code class="docutils literal notranslate"><span class="pre">text/html</span></code></p></li>
</ul>
</section>
<section id="method-http-accept-encoding">
<span id="module-searx.botdetection.http_accept_encoding"></span><h3><a class="toc-backref" href="#id11" role="doc-backlink">Method <code class="docutils literal notranslate"><span class="pre">http_accept_encoding</span></code></a><a class="headerlink" href="#method-http-accept-encoding" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">http_accept_encoding</span></code> method evaluates a request as the request of a
bot if the <a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding">Accept-Encoding</a> header ..</p>
<ul class="simple">
<li><p>did not contain <code class="docutils literal notranslate"><span class="pre">gzip</span></code> AND <code class="docutils literal notranslate"><span class="pre">deflate</span></code> (if both values are missed)</p></li>
<li><p>did not contain <code class="docutils literal notranslate"><span class="pre">text/html</span></code></p></li>
</ul>
</section>
<section id="method-http-accept-language">
<span id="module-searx.botdetection.http_accept_language"></span><h3><a class="toc-backref" href="#id12" role="doc-backlink">Method <code class="docutils literal notranslate"><span class="pre">http_accept_language</span></code></a><a class="headerlink" href="#method-http-accept-language" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">http_accept_language</span></code> method evaluates a request as the request of a bot
if the <a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent">Accept-Language</a> header is unset.</p>
</section>
<section id="method-http-connection">
<span id="module-searx.botdetection.http_connection"></span><h3><a class="toc-backref" href="#id13" role="doc-backlink">Method <code class="docutils literal notranslate"><span class="pre">http_connection</span></code></a><a class="headerlink" href="#method-http-connection" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">http_connection</span></code> method evaluates a request as the request of a bot if
the <a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Connection">Connection</a> header is set to <code class="docutils literal notranslate"><span class="pre">close</span></code>.</p>
</section>
<section id="method-http-user-agent">
<span id="module-searx.botdetection.http_user_agent"></span><h3><a class="toc-backref" href="#id14" role="doc-backlink">Method <code class="docutils literal notranslate"><span class="pre">http_user_agent</span></code></a><a class="headerlink" href="#method-http-user-agent" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">http_user_agent</span></code> method evaluates a request as the request of a bot if
the <a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent">User-Agent</a> header is unset or matches the regular expression
<a class="reference internal" href="#searx.botdetection.http_user_agent.USER_AGENT" title="searx.botdetection.http_user_agent.USER_AGENT"><code class="xref py py-obj docutils literal notranslate"><span class="pre">USER_AGENT</span></code></a>.</p>
</section>
<dl class="py data">
<dt class="sig sig-object py" id="searx.botdetection.http_user_agent.USER_AGENT">
<span class="sig-prename descclassname"><span class="pre">searx.botdetection.http_user_agent.</span></span><span class="sig-name descname"><span class="pre">USER_AGENT</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">'(unknown|[Cc][Uu][Rr][Ll]|[wW]get|Scrapy|splash|JavaFX|FeedFetcher|python-requests|Go-http-client|Java|Jakarta|okhttp|HttpClient|Jersey|Python|libwww-perl|Ruby|SynHttpClient|UniversalFeedParser|Googlebot|GoogleImageProxy|bingbot|Baiduspider|yacybot|YandexMobileBot|YandexBot|Yahoo!</span> <span class="pre">Slurp|MJ12bot|AhrefsBot|archive.org_bot|msnbot|MJ12bot|SeznamBot|linkdexbot|Netvibes|SMTBot|zgrab|James</span> <span class="pre">BOT|Sogou|Abonti|Pixray|Spinn3r|SemrushBot|Exabot|ZmEu|BLEXBot|bitlybot|HeadlessChrome|Mozilla/5\\.0\\</span> <span class="pre">\\(compatible;\\</span> <span class="pre">Farside/0\\.1\\.0;\\</span> <span class="pre">\\+https://farside\\.link\\)|.*PetalBot.*)'</span></em><a class="headerlink" href="#searx.botdetection.http_user_agent.USER_AGENT" title="Link to this definition">¶</a></dt>
<dd><p>Regular expression that matches to <a class="reference external" href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent">User-Agent</a> from known <em>bots</em></p>
</dd></dl>

</section>
<section id="module-searx.botdetection.config">
<span id="config"></span><span id="botdetection-config"></span><h2><a class="toc-backref" href="#id15" role="doc-backlink">Config</a><a class="headerlink" href="#module-searx.botdetection.config" title="Link to this heading">¶</a></h2>
<p>Configuration class <a class="reference internal" href="#searx.botdetection.config.Config" title="searx.botdetection.config.Config"><code class="xref py py-class docutils literal notranslate"><span class="pre">Config</span></code></a> with deep-update, schema validation
and deprecated names.</p>
<p>The <a class="reference internal" href="#searx.botdetection.config.Config" title="searx.botdetection.config.Config"><code class="xref py py-class docutils literal notranslate"><span class="pre">Config</span></code></a> class implements a configuration that is based on
structured dictionaries.  The configuration schema is defined in a dictionary
structure and the configuration data is given in a dictionary structure.</p>
<dl class="py exception">
<dt class="sig sig-object py" id="searx.botdetection.config.SchemaIssue">
<em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">searx.botdetection.config.</span></span><span class="sig-name descname"><span class="pre">SchemaIssue</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">level</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/typing.html#typing.Literal" title="(in Python v3.13)"><span class="pre">Literal</span></a><span class="p"><span class="pre">[</span></span><span class="s"><span class="pre">'warn'</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="s"><span class="pre">'invalid'</span></span><span class="p"><span class="pre">]</span></span></span></em>, <em class="sig-param"><span class="n"><span class="pre">msg</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/botdetection/config.html#SchemaIssue"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.SchemaIssue" title="Link to this definition">¶</a></dt>
<dd><p>Exception to store and/or raise a message from a schema issue.</p>
</dd></dl>

<dl class="py class">
<dt class="sig sig-object py" id="searx.botdetection.config.Config">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">searx.botdetection.config.</span></span><span class="sig-name descname"><span class="pre">Config</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">cfg_schema</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/typing.html#typing.Dict" title="(in Python v3.13)"><span class="pre">Dict</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">deprecated</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/typing.html#typing.Dict" title="(in Python v3.13)"><span class="pre">Dict</span></a><span class="p"><span class="pre">[</span></span><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 class="p"><span class="pre">,</span></span><span class="w"> </span><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 class="p"><span class="pre">]</span></span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/searx/botdetection/config.html#Config"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.Config" title="Link to this definition">¶</a></dt>
<dd><p>Base class used for configuration</p>
<dl class="py method">
<dt class="sig sig-object py" id="searx.botdetection.config.Config.default">
<span class="sig-name descname"><span class="pre">default</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</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/botdetection/config.html#Config.default"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.Config.default" title="Link to this definition">¶</a></dt>
<dd><p>Returns default value of field <code class="docutils literal notranslate"><span class="pre">name</span></code> in <code class="docutils literal notranslate"><span class="pre">self.cfg_schema</span></code>.</p>
</dd></dl>

<dl class="py method">
<dt class="sig sig-object py" id="searx.botdetection.config.Config.get">
<span class="sig-name descname"><span class="pre">get</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name:</span> <span class="pre">str</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">default:</span> <span class="pre">~typing.Any</span> <span class="pre">=</span> <span class="pre">&lt;UNSET&gt;</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">replace:</span> <span class="pre">bool</span> <span class="pre">=</span> <span class="pre">True</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Any" title="(in Python v3.13)"><span class="pre">Any</span></a></span></span><a class="reference internal" href="../_modules/searx/botdetection/config.html#Config.get"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.Config.get" title="Link to this definition">¶</a></dt>
<dd><p>Returns the value to which <code class="docutils literal notranslate"><span class="pre">name</span></code> points in the configuration.</p>
<p>If there is no such <code class="docutils literal notranslate"><span class="pre">name</span></code> in the config and the <code class="docutils literal notranslate"><span class="pre">default</span></code> is
<code class="xref py py-obj docutils literal notranslate"><span class="pre">UNSET</span></code>, a <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#KeyError" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">KeyError</span></code></a> is raised.</p>
</dd></dl>

<dl class="py method">
<dt class="sig sig-object py" id="searx.botdetection.config.Config.path">
<span class="sig-name descname"><span class="pre">path</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name:</span> <span class="pre">str</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">default=&lt;UNSET&gt;</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/searx/botdetection/config.html#Config.path"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.Config.path" title="Link to this definition">¶</a></dt>
<dd><p>Get a <a class="reference external" href="https://docs.python.org/3/library/pathlib.html#pathlib.Path" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">pathlib.Path</span></code></a> object from a config string.</p>
</dd></dl>

<dl class="py method">
<dt class="sig sig-object py" id="searx.botdetection.config.Config.pyobj">
<span class="sig-name descname"><span class="pre">pyobj</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">default=&lt;UNSET&gt;</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/searx/botdetection/config.html#Config.pyobj"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.Config.pyobj" title="Link to this definition">¶</a></dt>
<dd><p>Get python object referred by full qualiffied name (FQN) in the config
string.</p>
</dd></dl>

<dl class="py method">
<dt class="sig sig-object py" id="searx.botdetection.config.Config.set">
<span class="sig-name descname"><span class="pre">set</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</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">val</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/searx/botdetection/config.html#Config.set"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.Config.set" title="Link to this definition">¶</a></dt>
<dd><p>Set the value to which <code class="docutils literal notranslate"><span class="pre">name</span></code> points in the configuration.</p>
<p>If there is no such <code class="docutils literal notranslate"><span class="pre">name</span></code> in the config, a <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#KeyError" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">KeyError</span></code></a> is
raised.</p>
</dd></dl>

<dl class="py method">
<dt class="sig sig-object py" id="searx.botdetection.config.Config.update">
<span class="sig-name descname"><span class="pre">update</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">upd_cfg</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#dict" title="(in Python v3.13)"><span class="pre">dict</span></a></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/searx/botdetection/config.html#Config.update"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.Config.update" title="Link to this definition">¶</a></dt>
<dd><p>Update this configuration by <code class="docutils literal notranslate"><span class="pre">upd_cfg</span></code>.</p>
</dd></dl>

<dl class="py method">
<dt class="sig sig-object py" id="searx.botdetection.config.Config.validate">
<span class="sig-name descname"><span class="pre">validate</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">cfg</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#dict" title="(in Python v3.13)"><span class="pre">dict</span></a></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/searx/botdetection/config.html#Config.validate"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.botdetection.config.Config.validate" title="Link to this definition">¶</a></dt>
<dd><p>Validation of dictionary <code class="docutils literal notranslate"><span class="pre">cfg</span></code> on <code class="xref py py-obj docutils literal notranslate"><span class="pre">Config.SCHEMA</span></code>.
Validation is done by <a class="reference internal" href="#searx.botdetection.config.Config.validate" title="searx.botdetection.config.Config.validate"><code class="xref py py-obj docutils literal notranslate"><span class="pre">validate</span></code></a>.</p>
</dd></dl>

</dd></dl>

</section>
</section>


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<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"><a class="reference internal" href="../dev/index.html">Developer documentation</a></li>
<li class="toctree-l1"><a class="reference internal" href="../utils/index.html">DevOps tooling box</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Source-Code</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="searx.babel_extract.html">Custom message extractor (i18n)</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">Bot Detection</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#searx.botdetection.get_network"><code class="docutils literal notranslate"><span class="pre">get_network()</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="#searx.botdetection.get_real_ip"><code class="docutils literal notranslate"><span class="pre">get_real_ip()</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="#searx.botdetection.too_many_requests"><code class="docutils literal notranslate"><span class="pre">too_many_requests()</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="#module-searx.botdetection.ip_lists">IP lists</a><ul>
<li class="toctree-l4"><a class="reference internal" href="#method-ip-lists">Method <code class="docutils literal notranslate"><span class="pre">ip_lists</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_lists.block_ip"><code class="docutils literal notranslate"><span class="pre">block_ip()</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_lists.pass_ip"><code class="docutils literal notranslate"><span class="pre">pass_ip()</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_lists.SEARXNG_ORG"><code class="docutils literal notranslate"><span class="pre">SEARXNG_ORG</span></code></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="#module-searx.botdetection.ip_limit">Rate limit</a><ul>
<li class="toctree-l4"><a class="reference internal" href="#method-ip-limit">Method <code class="docutils literal notranslate"><span class="pre">ip_limit</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.API_MAX"><code class="docutils literal notranslate"><span class="pre">API_MAX</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.API_WINDOW"><code class="docutils literal notranslate"><span class="pre">API_WINDOW</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.BURST_MAX"><code class="docutils literal notranslate"><span class="pre">BURST_MAX</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.BURST_MAX_SUSPICIOUS"><code class="docutils literal notranslate"><span class="pre">BURST_MAX_SUSPICIOUS</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.BURST_WINDOW"><code class="docutils literal notranslate"><span class="pre">BURST_WINDOW</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.LONG_MAX"><code class="docutils literal notranslate"><span class="pre">LONG_MAX</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.LONG_MAX_SUSPICIOUS"><code class="docutils literal notranslate"><span class="pre">LONG_MAX_SUSPICIOUS</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.LONG_WINDOW"><code class="docutils literal notranslate"><span class="pre">LONG_WINDOW</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.SUSPICIOUS_IP_MAX"><code class="docutils literal notranslate"><span class="pre">SUSPICIOUS_IP_MAX</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.ip_limit.SUSPICIOUS_IP_WINDOW"><code class="docutils literal notranslate"><span class="pre">SUSPICIOUS_IP_WINDOW</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#method-link-token">Method <code class="docutils literal notranslate"><span class="pre">link_token</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.link_token.get_ping_key"><code class="docutils literal notranslate"><span class="pre">get_ping_key()</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.link_token.get_token"><code class="docutils literal notranslate"><span class="pre">get_token()</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.link_token.is_suspicious"><code class="docutils literal notranslate"><span class="pre">is_suspicious()</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.link_token.ping"><code class="docutils literal notranslate"><span class="pre">ping()</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.link_token.PING_KEY"><code class="docutils literal notranslate"><span class="pre">PING_KEY</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.link_token.PING_LIVE_TIME"><code class="docutils literal notranslate"><span class="pre">PING_LIVE_TIME</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.link_token.TOKEN_KEY"><code class="docutils literal notranslate"><span class="pre">TOKEN_KEY</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.link_token.TOKEN_LIVE_TIME"><code class="docutils literal notranslate"><span class="pre">TOKEN_LIVE_TIME</span></code></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="#module-searx.botdetection.http_accept">Probe HTTP headers</a><ul>
<li class="toctree-l4"><a class="reference internal" href="#method-http-accept">Method <code class="docutils literal notranslate"><span class="pre">http_accept</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#method-http-accept-encoding">Method <code class="docutils literal notranslate"><span class="pre">http_accept_encoding</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#method-http-accept-language">Method <code class="docutils literal notranslate"><span class="pre">http_accept_language</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#method-http-connection">Method <code class="docutils literal notranslate"><span class="pre">http_connection</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#method-http-user-agent">Method <code class="docutils literal notranslate"><span class="pre">http_user_agent</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.http_user_agent.USER_AGENT"><code class="docutils literal notranslate"><span class="pre">USER_AGENT</span></code></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="#module-searx.botdetection.config">Config</a><ul>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.config.SchemaIssue"><code class="docutils literal notranslate"><span class="pre">SchemaIssue</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#searx.botdetection.config.Config"><code class="docutils literal notranslate"><span class="pre">Config</span></code></a><ul>
<li class="toctree-l5"><a class="reference internal" href="#searx.botdetection.config.Config.default"><code class="docutils literal notranslate"><span class="pre">Config.default()</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.botdetection.config.Config.get"><code class="docutils literal notranslate"><span class="pre">Config.get()</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.botdetection.config.Config.path"><code class="docutils literal notranslate"><span class="pre">Config.path()</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.botdetection.config.Config.pyobj"><code class="docutils literal notranslate"><span class="pre">Config.pyobj()</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.botdetection.config.Config.set"><code class="docutils literal notranslate"><span class="pre">Config.set()</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.botdetection.config.Config.update"><code class="docutils literal notranslate"><span class="pre">Config.update()</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="#searx.botdetection.config.Config.validate"><code class="docutils literal notranslate"><span class="pre">Config.validate()</span></code></a></li>
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