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<li class="nav-item nav-item-this"><a href="">Running shell commands to fetch results</a></li>
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<section id="running-shell-commands-to-fetch-results">
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<h1>Running shell commands to fetch results<a class="headerlink" href="#running-shell-commands-to-fetch-results" title="Permalink to this heading">¶</a></h1>
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<p>Previously, with searx you could search over the Internet on other people’s
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computers. Now it is possible to fetch results from your local machine without
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connecting to any networks from the same graphical user interface.</p>
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<section id="command-line-engines">
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<h2>Command line engines<a class="headerlink" href="#command-line-engines" title="Permalink to this heading">¶</a></h2>
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<p>In <a class="reference external" href="https://github.com/searx/searx/pull/2128">PR 2128</a> a new type of engine has been introduced called <code class="docutils literal notranslate"><span class="pre">command</span></code>.
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This engine lets administrators add engines which run arbitrary shell commands
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and show its output on the web UI of searx.</p>
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<p>When creating and enabling a <code class="docutils literal notranslate"><span class="pre">command</span></code> engine on a public searx instance,
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you must be careful to avoid leaking private data. The easiest solution
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is to add tokens to the engine. Thus, only those who have the appropriate token
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can retrieve results from the it.</p>
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<p>The engine base is flexible. Only your imagination can limit the power of this engine. (And
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maybe security concerns.) The following options are available:</p>
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<ul class="simple">
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<li><p><code class="docutils literal notranslate"><span class="pre">command</span></code>: A comma separated list of the elements of the command. A special token {{QUERY}} tells searx where to put the search terms of the user. Example: <code class="docutils literal notranslate"><span class="pre">['ls',</span> <span class="pre">'-l',</span> <span class="pre">'-h',</span> <span class="pre">'{{QUERY}}']</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">delimiter</span></code>: A dict containing a delimiter char and the “titles” of each element in keys.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">parse_regex</span></code>: A dict containing the regular expressions for each result key.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">query_type</span></code>: The expected type of user search terms. Possible values: <code class="docutils literal notranslate"><span class="pre">path</span></code> and <code class="docutils literal notranslate"><span class="pre">enum</span></code>. <code class="docutils literal notranslate"><span class="pre">path</span></code> checks if the uesr provided path is inside the working directory. If not the query is not executed. <code class="docutils literal notranslate"><span class="pre">enum</span></code> is a list of allowed search terms. If the user submits something which is not included in the list, the query returns an error.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">query_enum</span></code>: A list containing allowed search terms if <code class="docutils literal notranslate"><span class="pre">query_type</span></code> is set to <code class="docutils literal notranslate"><span class="pre">enum</span></code>.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">working_dir</span></code>: The directory where the command has to be executed. Default: <code class="docutils literal notranslate"><span class="pre">.</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">result_separator</span></code>: The character that separates results. Default: <code class="docutils literal notranslate"><span class="pre">\n</span></code></p></li>
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</ul>
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<p>The example engine below can be used to find files with a specific name in the configured
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working directory.</p>
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<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">find</span><span class="w"></span>
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<span class="w"> </span><span class="nt">engine</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">command</span><span class="w"></span>
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<span class="w"> </span><span class="nt">command</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">'find'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'.'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'-name'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'{{QUERY}}'</span><span class="p p-Indicator">]</span><span class="w"></span>
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<span class="w"> </span><span class="nt">query_type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">path</span><span class="w"></span>
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<span class="w"> </span><span class="nt">shortcut</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">fnd</span><span class="w"></span>
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<span class="w"> </span><span class="nt">delimiter</span><span class="p">:</span><span class="w"></span>
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<span class="w"> </span><span class="nt">chars</span><span class="p">:</span><span class="w"> </span><span class="s">'</span><span class="nv"> </span><span class="s">'</span><span class="w"></span>
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<span class="w"> </span><span class="nt">keys</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">'line'</span><span class="p p-Indicator">]</span><span class="w"></span>
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</pre></div>
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</div>
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</section>
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<section id="next-steps">
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<h2>Next steps<a class="headerlink" href="#next-steps" title="Permalink to this heading">¶</a></h2>
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<p>In the next milestone, support for local search engines and indexers (e.g. Elasticsearch)
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are going to be added. This way, you will be able to query your own databases/indexers.</p>
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</section>
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<section id="acknowledgement">
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<h2>Acknowledgement<a class="headerlink" href="#acknowledgement" title="Permalink to this heading">¶</a></h2>
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<p>This development was sponsored by <a class="reference external" href="https://nlnet.nl/discovery">Search and Discovery Fund</a> of <a class="reference external" href="https://nlnet.nl/">NLnet Foundation</a> .</p>
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<div class="line-block">
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<div class="line">Happy hacking.</div>
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<div class="line">kvch // 2020.09.28 21:26</div>
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