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<h1>Source code for searx.infopage</h1><div class="highlight"><pre>
<span></span><span class="c1"># SPDX-License-Identifier: AGPL-3.0-or-later</span>
<span class="sd">&quot;&quot;&quot;Render SearXNG instance documentation.</span>
<span class="sd">Usage in a Flask app route:</span>
<span class="sd">.. code:: python</span>
<span class="sd"> from searx import infopage</span>
<span class="sd"> _INFO_PAGES = infopage.InfoPageSet(infopage.MistletoePage)</span>
<span class="sd"> @app.route(&#39;/info/&lt;pagename&gt;&#39;, methods=[&#39;GET&#39;])</span>
<span class="sd"> def info(pagename):</span>
<span class="sd"> locale = request.preferences.get_value(&#39;locale&#39;)</span>
<span class="sd"> page = _INFO_PAGES.get_page(pagename, locale)</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">annotations</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;InfoPage&#39;</span><span class="p">,</span> <span class="s1">&#39;InfoPageSet&#39;</span><span class="p">]</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">os.path</span>
<span class="kn">import</span> <span class="nn">logging</span>
<span class="kn">import</span> <span class="nn">typing</span>
<span class="kn">import</span> <span class="nn">urllib.parse</span>
<span class="kn">from</span> <span class="nn">functools</span> <span class="kn">import</span> <span class="n">cached_property</span>
<span class="kn">import</span> <span class="nn">jinja2</span>
<span class="kn">from</span> <span class="nn">flask.helpers</span> <span class="kn">import</span> <span class="n">url_for</span>
<span class="kn">from</span> <span class="nn">markdown_it</span> <span class="kn">import</span> <span class="n">MarkdownIt</span>
<span class="kn">from</span> <span class="nn">..</span> <span class="kn">import</span> <span class="n">get_setting</span>
<span class="kn">from</span> <span class="nn">..version</span> <span class="kn">import</span> <span class="n">GIT_URL</span>
<span class="kn">from</span> <span class="nn">..locales</span> <span class="kn">import</span> <span class="n">LOCALE_NAMES</span>
<span class="n">logger</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="s1">&#39;searx.infopage&#39;</span><span class="p">)</span>
<span class="n">_INFO_FOLDER</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="vm">__file__</span><span class="p">))</span>
<span class="n">INFO_PAGES</span><span class="p">:</span> <span class="s1">&#39;InfoPageSet&#39;</span>
<span class="k">def</span> <span class="fm">__getattr__</span><span class="p">(</span><span class="n">name</span><span class="p">):</span>
<span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="s1">&#39;INFO_PAGES&#39;</span><span class="p">:</span>
<span class="k">global</span> <span class="n">INFO_PAGES</span> <span class="c1"># pylint: disable=global-statement</span>
<span class="n">INFO_PAGES</span> <span class="o">=</span> <span class="n">InfoPageSet</span><span class="p">()</span>
<span class="k">return</span> <span class="n">INFO_PAGES</span>
<span class="k">raise</span> <span class="ne">AttributeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;module </span><span class="si">{</span><span class="vm">__name__</span><span class="si">!r}</span><span class="s2"> has no attribute </span><span class="si">{</span><span class="n">name</span><span class="si">!r}</span><span class="s2">&quot;</span><span class="p">)</span>
<div class="viewcode-block" id="InfoPage">
<a class="viewcode-back" href="../../src/searx.infopage.html#searx.infopage.InfoPage">[docs]</a>
<span class="k">class</span> <span class="nc">InfoPage</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;A page of the :py:obj:`online documentation &lt;InfoPageSet&gt;`.&quot;&quot;&quot;</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fname</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fname</span> <span class="o">=</span> <span class="n">fname</span>
<span class="nd">@cached_property</span>
<span class="k">def</span> <span class="nf">raw_content</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Raw content of the page (without any jinja rendering)&quot;&quot;&quot;</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">fname</span><span class="p">,</span> <span class="s1">&#39;r&#39;</span><span class="p">,</span> <span class="n">encoding</span><span class="o">=</span><span class="s1">&#39;utf-8&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="k">return</span> <span class="n">f</span><span class="o">.</span><span class="n">read</span><span class="p">()</span>
<span class="nd">@cached_property</span>
<span class="k">def</span> <span class="nf">content</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Content of the page (rendered in a Jinja context)&quot;&quot;&quot;</span>
<span class="n">ctx</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_ctx</span><span class="p">()</span>
<span class="n">template</span> <span class="o">=</span> <span class="n">jinja2</span><span class="o">.</span><span class="n">Environment</span><span class="p">()</span><span class="o">.</span><span class="n">from_string</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">raw_content</span><span class="p">)</span>
<span class="k">return</span> <span class="n">template</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="o">**</span><span class="n">ctx</span><span class="p">)</span>
<span class="nd">@cached_property</span>
<span class="k">def</span> <span class="nf">title</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Title of the content (without any markup)&quot;&quot;&quot;</span>
<span class="n">t</span> <span class="o">=</span> <span class="s2">&quot;&quot;</span>
<span class="k">for</span> <span class="n">l</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">raw_content</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;</span><span class="se">\n</span><span class="s1">&#39;</span><span class="p">):</span>
<span class="k">if</span> <span class="n">l</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s1">&#39;# &#39;</span><span class="p">):</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">l</span><span class="o">.</span><span class="n">strip</span><span class="p">(</span><span class="s1">&#39;# &#39;</span><span class="p">)</span>
<span class="k">return</span> <span class="n">t</span>
<span class="nd">@cached_property</span>
<span class="k">def</span> <span class="nf">html</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Render Markdown (CommonMark_) to HTML by using markdown-it-py_.</span>
<span class="sd"> .. _CommonMark: https://commonmark.org/</span>
<span class="sd"> .. _markdown-it-py: https://github.com/executablebooks/markdown-it-py</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span> <span class="p">(</span>
<span class="n">MarkdownIt</span><span class="p">(</span><span class="s2">&quot;commonmark&quot;</span><span class="p">,</span> <span class="p">{</span><span class="s2">&quot;typographer&quot;</span><span class="p">:</span> <span class="kc">True</span><span class="p">})</span><span class="o">.</span><span class="n">enable</span><span class="p">([</span><span class="s2">&quot;replacements&quot;</span><span class="p">,</span> <span class="s2">&quot;smartquotes&quot;</span><span class="p">])</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">content</span><span class="p">)</span>
<span class="p">)</span>
<div class="viewcode-block" id="InfoPage.get_ctx">
<a class="viewcode-back" href="../../src/searx.infopage.html#searx.infopage.InfoPage.get_ctx">[docs]</a>
<span class="k">def</span> <span class="nf">get_ctx</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Jinja context to render :py:obj:`InfoPage.content`&quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">_md_link</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">url</span><span class="p">):</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">url_for</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">_external</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">return</span> <span class="s2">&quot;[</span><span class="si">%s</span><span class="s2">](</span><span class="si">%s</span><span class="s2">)&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">url</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_md_search</span><span class="p">(</span><span class="n">query</span><span class="p">):</span>
<span class="n">url</span> <span class="o">=</span> <span class="s1">&#39;</span><span class="si">%s</span><span class="s1">?q=</span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="n">url_for</span><span class="p">(</span><span class="s1">&#39;search&#39;</span><span class="p">,</span> <span class="n">_external</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span> <span class="n">urllib</span><span class="o">.</span><span class="n">parse</span><span class="o">.</span><span class="n">quote</span><span class="p">(</span><span class="n">query</span><span class="p">))</span>
<span class="k">return</span> <span class="s1">&#39;[</span><span class="si">%s</span><span class="s1">](</span><span class="si">%s</span><span class="s1">)&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">url</span><span class="p">)</span>
<span class="n">ctx</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">ctx</span><span class="p">[</span><span class="s1">&#39;GIT_URL&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">GIT_URL</span>
<span class="n">ctx</span><span class="p">[</span><span class="s1">&#39;get_setting&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">get_setting</span>
<span class="n">ctx</span><span class="p">[</span><span class="s1">&#39;link&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">_md_link</span>
<span class="n">ctx</span><span class="p">[</span><span class="s1">&#39;search&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">_md_search</span>
<span class="k">return</span> <span class="n">ctx</span></div>
<span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="sa">f</span><span class="s1">&#39;&lt;</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s1"> fname=</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">fname</span><span class="si">!r}</span><span class="s1">&gt;&#39;</span></div>
<div class="viewcode-block" id="InfoPageSet">
<a class="viewcode-back" href="../../src/searx.infopage.html#searx.infopage.InfoPageSet">[docs]</a>
<span class="k">class</span> <span class="nc">InfoPageSet</span><span class="p">:</span> <span class="c1"># pylint: disable=too-few-public-methods</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Cached rendering of the online documentation a SearXNG instance has.</span>
<span class="sd"> :param page_class: render online documentation by :py:obj:`InfoPage` parser.</span>
<span class="sd"> :type page_class: :py:obj:`InfoPage`</span>
<span class="sd"> :param info_folder: information directory</span>
<span class="sd"> :type info_folder: str</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span>
<span class="bp">self</span><span class="p">,</span> <span class="n">page_class</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">typing</span><span class="o">.</span><span class="n">Type</span><span class="p">[</span><span class="n">InfoPage</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">info_folder</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
<span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">page_class</span> <span class="o">=</span> <span class="n">page_class</span> <span class="ow">or</span> <span class="n">InfoPage</span>
<span class="bp">self</span><span class="o">.</span><span class="n">folder</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">info_folder</span> <span class="ow">or</span> <span class="n">_INFO_FOLDER</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;location of the Markdown files&quot;&quot;&quot;</span>
<span class="bp">self</span><span class="o">.</span><span class="n">CACHE</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">tuple</span><span class="p">,</span> <span class="n">typing</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">InfoPage</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">locale_default</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s1">&#39;en&#39;</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;default language&quot;&quot;&quot;</span>
<span class="bp">self</span><span class="o">.</span><span class="n">locales</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
<span class="n">locale</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">&#39;_&#39;</span><span class="p">,</span> <span class="s1">&#39;-&#39;</span><span class="p">)</span> <span class="k">for</span> <span class="n">locale</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">listdir</span><span class="p">(</span><span class="n">_INFO_FOLDER</span><span class="p">)</span> <span class="k">if</span> <span class="n">locale</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">&#39;_&#39;</span><span class="p">,</span> <span class="s1">&#39;-&#39;</span><span class="p">)</span> <span class="ow">in</span> <span class="n">LOCALE_NAMES</span>
<span class="p">]</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;list of supported languages (aka locales)&quot;&quot;&quot;</span>
<span class="bp">self</span><span class="o">.</span><span class="n">toc</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
<span class="s1">&#39;search-syntax&#39;</span><span class="p">,</span>
<span class="s1">&#39;about&#39;</span><span class="p">,</span>
<span class="s1">&#39;donate&#39;</span><span class="p">,</span>
<span class="p">]</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;list of articles in the online documentation&quot;&quot;&quot;</span>
<div class="viewcode-block" id="InfoPageSet.get_page">
<a class="viewcode-back" href="../../src/searx.infopage.html#searx.infopage.InfoPageSet.get_page">[docs]</a>
<span class="k">def</span> <span class="nf">get_page</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">pagename</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">locale</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Return ``pagename`` instance of :py:obj:`InfoPage`</span>
<span class="sd"> :param pagename: name of the page, a value from :py:obj:`InfoPageSet.toc`</span>
<span class="sd"> :type pagename: str</span>
<span class="sd"> :param locale: language of the page, e.g. ``en``, ``zh_Hans_CN``</span>
<span class="sd"> (default: :py:obj:`InfoPageSet.i18n_origin`)</span>
<span class="sd"> :type locale: str</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">locale</span> <span class="o">=</span> <span class="n">locale</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">locale_default</span>
<span class="k">if</span> <span class="n">pagename</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">toc</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">locale</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">locales</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="n">cache_key</span> <span class="o">=</span> <span class="p">(</span><span class="n">pagename</span><span class="p">,</span> <span class="n">locale</span><span class="p">)</span>
<span class="k">if</span> <span class="n">cache_key</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">CACHE</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">CACHE</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span>
<span class="c1"># not yet instantiated</span>
<span class="n">fname</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">folder</span><span class="p">,</span> <span class="n">locale</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">&#39;-&#39;</span><span class="p">,</span> <span class="s1">&#39;_&#39;</span><span class="p">),</span> <span class="n">pagename</span><span class="p">)</span> <span class="o">+</span> <span class="s1">&#39;.md&#39;</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">fname</span><span class="p">):</span>
<span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;file </span><span class="si">%s</span><span class="s1"> does not exists&#39;</span><span class="p">,</span> <span class="n">fname</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">CACHE</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="n">page</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">page_class</span><span class="p">(</span><span class="n">fname</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">CACHE</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">page</span>
<span class="k">return</span> <span class="n">page</span></div>
<div class="viewcode-block" id="InfoPageSet.iter_pages">
<a class="viewcode-back" href="../../src/searx.infopage.html#searx.infopage.InfoPageSet.iter_pages">[docs]</a>
<span class="k">def</span> <span class="nf">iter_pages</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">locale</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">fallback_to_default</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Iterate over all pages of the TOC&quot;&quot;&quot;</span>
<span class="n">locale</span> <span class="o">=</span> <span class="n">locale</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">locale_default</span>
<span class="k">for</span> <span class="n">page_name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">toc</span><span class="p">:</span>
<span class="n">page_locale</span> <span class="o">=</span> <span class="n">locale</span>
<span class="n">page</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_page</span><span class="p">(</span><span class="n">page_name</span><span class="p">,</span> <span class="n">locale</span><span class="p">)</span>
<span class="k">if</span> <span class="n">fallback_to_default</span> <span class="ow">and</span> <span class="n">page</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">page_locale</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">locale_default</span>
<span class="n">page</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_page</span><span class="p">(</span><span class="n">page_name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">locale_default</span><span class="p">)</span>
<span class="k">if</span> <span class="n">page</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="c1"># page is None if the page was deleted by the administrator</span>
<span class="k">yield</span> <span class="n">page_name</span><span class="p">,</span> <span class="n">page_locale</span><span class="p">,</span> <span class="n">page</span></div>
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