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<h1>Source code for searx.utils</h1><div class="highlight"><pre>
<span></span><span class="c1"># SPDX-License-Identifier: AGPL-3.0-or-later</span>
<span class="c1"># lint: pylint</span>
<span class="c1"># pyright: basic</span>
<span class="sd">&quot;&quot;&quot;Utility functions for the engines</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class="nn">re</span>
<span class="kn">import</span> <span class="nn">importlib</span>
<span class="kn">import</span> <span class="nn">importlib.util</span>
<span class="kn">import</span> <span class="nn">types</span>
<span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Optional</span><span class="p">,</span> <span class="n">Union</span><span class="p">,</span> <span class="n">Any</span><span class="p">,</span> <span class="n">Set</span><span class="p">,</span> <span class="n">List</span><span class="p">,</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">MutableMapping</span><span class="p">,</span> <span class="n">Tuple</span><span class="p">,</span> <span class="n">Callable</span>
<span class="kn">from</span> <span class="nn">numbers</span> <span class="kn">import</span> <span class="n">Number</span>
<span class="kn">from</span> <span class="nn">os.path</span> <span class="kn">import</span> <span class="n">splitext</span><span class="p">,</span> <span class="n">join</span>
<span class="kn">from</span> <span class="nn">random</span> <span class="kn">import</span> <span class="n">choice</span>
<span class="kn">from</span> <span class="nn">html.parser</span> <span class="kn">import</span> <span class="n">HTMLParser</span>
<span class="kn">from</span> <span class="nn">urllib.parse</span> <span class="kn">import</span> <span class="n">urljoin</span><span class="p">,</span> <span class="n">urlparse</span>
<span class="kn">from</span> <span class="nn">lxml</span> <span class="kn">import</span> <span class="n">html</span>
<span class="kn">from</span> <span class="nn">lxml.etree</span> <span class="kn">import</span> <span class="n">ElementBase</span><span class="p">,</span> <span class="n">XPath</span><span class="p">,</span> <span class="n">XPathError</span><span class="p">,</span> <span class="n">XPathSyntaxError</span><span class="p">,</span> <span class="n">_ElementStringResult</span><span class="p">,</span> <span class="n">_ElementUnicodeResult</span>
<span class="kn">from</span> <span class="nn">babel.core</span> <span class="kn">import</span> <span class="n">get_global</span>
<span class="kn">from</span> <span class="nn">searx</span> <span class="kn">import</span> <span class="n">settings</span>
<span class="kn">from</span> <span class="nn">searx.data</span> <span class="kn">import</span> <span class="n">USER_AGENTS</span><span class="p">,</span> <span class="n">data_dir</span>
<span class="kn">from</span> <span class="nn">searx.version</span> <span class="kn">import</span> <span class="n">VERSION_TAG</span>
<span class="kn">from</span> <span class="nn">searx.languages</span> <span class="kn">import</span> <span class="n">language_codes</span>
<span class="kn">from</span> <span class="nn">searx.exceptions</span> <span class="kn">import</span> <span class="n">SearxXPathSyntaxException</span><span class="p">,</span> <span class="n">SearxEngineXPathException</span>
<span class="kn">from</span> <span class="nn">searx</span> <span class="kn">import</span> <span class="n">logger</span>
<span class="n">logger</span> <span class="o">=</span> <span class="n">logger</span><span class="o">.</span><span class="n">getChild</span><span class="p">(</span><span class="s1">&#39;utils&#39;</span><span class="p">)</span>
<span class="n">XPathSpecType</span> <span class="o">=</span> <span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">XPath</span><span class="p">]</span>
<span class="n">_BLOCKED_TAGS</span> <span class="o">=</span> <span class="p">(</span><span class="s1">&#39;script&#39;</span><span class="p">,</span> <span class="s1">&#39;style&#39;</span><span class="p">)</span>
<span class="n">_ECMA_UNESCAPE4_RE</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="sa">r</span><span class="s1">&#39;</span><span class="si">%u</span><span class="s1">([0-9a-fA-F]</span><span class="si">{4}</span><span class="s1">)&#39;</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">UNICODE</span><span class="p">)</span>
<span class="n">_ECMA_UNESCAPE2_RE</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="sa">r</span><span class="s1">&#39;%([0-9a-fA-F]</span><span class="si">{2}</span><span class="s1">)&#39;</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">UNICODE</span><span class="p">)</span>
<span class="n">_STORAGE_UNIT_VALUE</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span>
<span class="s1">&#39;TB&#39;</span><span class="p">:</span> <span class="mi">1024</span> <span class="o">*</span> <span class="mi">1024</span> <span class="o">*</span> <span class="mi">1024</span> <span class="o">*</span> <span class="mi">1024</span><span class="p">,</span>
<span class="s1">&#39;GB&#39;</span><span class="p">:</span> <span class="mi">1024</span> <span class="o">*</span> <span class="mi">1024</span> <span class="o">*</span> <span class="mi">1024</span><span class="p">,</span>
<span class="s1">&#39;MB&#39;</span><span class="p">:</span> <span class="mi">1024</span> <span class="o">*</span> <span class="mi">1024</span><span class="p">,</span>
<span class="s1">&#39;TiB&#39;</span><span class="p">:</span> <span class="mi">1000</span> <span class="o">*</span> <span class="mi">1000</span> <span class="o">*</span> <span class="mi">1000</span> <span class="o">*</span> <span class="mi">1000</span><span class="p">,</span>
<span class="s1">&#39;MiB&#39;</span><span class="p">:</span> <span class="mi">1000</span> <span class="o">*</span> <span class="mi">1000</span><span class="p">,</span>
<span class="s1">&#39;KiB&#39;</span><span class="p">:</span> <span class="mi">1000</span><span class="p">,</span>
<span class="p">}</span>
<span class="n">_XPATH_CACHE</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">XPath</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">_LANG_TO_LC_CACHE</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</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">_FASTTEXT_MODEL</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="s2">&quot;fasttext.FastText._FastText&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
<span class="sd">&quot;&quot;&quot;fasttext model to predict laguage of a search term&quot;&quot;&quot;</span>
<span class="k">class</span> <span class="nc">_NotSetClass</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;Internal class for this module, do not create instance of this class.</span>
<span class="sd"> Replace the None value, allow explicitly pass None as a function argument&quot;&quot;&quot;</span>
<span class="n">_NOTSET</span> <span class="o">=</span> <span class="n">_NotSetClass</span><span class="p">()</span>
<div class="viewcode-block" id="searx_useragent"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.searx_useragent">[docs]</a><span class="k">def</span> <span class="nf">searx_useragent</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="nb">str</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Return the searx User Agent&quot;&quot;&quot;</span>
<span class="k">return</span> <span class="s1">&#39;searx/</span><span class="si">{searx_version}</span><span class="s1"> </span><span class="si">{suffix}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
<span class="n">searx_version</span><span class="o">=</span><span class="n">VERSION_TAG</span><span class="p">,</span> <span class="n">suffix</span><span class="o">=</span><span class="n">settings</span><span class="p">[</span><span class="s1">&#39;outgoing&#39;</span><span class="p">][</span><span class="s1">&#39;useragent_suffix&#39;</span><span class="p">]</span>
<span class="p">)</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span></div>
<div class="viewcode-block" id="gen_useragent"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.gen_useragent">[docs]</a><span class="k">def</span> <span class="nf">gen_useragent</span><span class="p">(</span><span class="n">os_string</span><span class="p">:</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="o">-&gt;</span> <span class="nb">str</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Return a random browser User Agent</span>
<span class="sd"> See searx/data/useragents.json</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span> <span class="n">USER_AGENTS</span><span class="p">[</span><span class="s1">&#39;ua&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">os</span><span class="o">=</span><span class="n">os_string</span> <span class="ow">or</span> <span class="n">choice</span><span class="p">(</span><span class="n">USER_AGENTS</span><span class="p">[</span><span class="s1">&#39;os&#39;</span><span class="p">]),</span> <span class="n">version</span><span class="o">=</span><span class="n">choice</span><span class="p">(</span><span class="n">USER_AGENTS</span><span class="p">[</span><span class="s1">&#39;versions&#39;</span><span class="p">]))</span></div>
<span class="k">class</span> <span class="nc">_HTMLTextExtractorException</span><span class="p">(</span><span class="ne">Exception</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Internal exception raised when the HTML is invalid&quot;&quot;&quot;</span>
<span class="k">class</span> <span class="nc">_HTMLTextExtractor</span><span class="p">(</span><span class="n">HTMLParser</span><span class="p">):</span> <span class="c1"># pylint: disable=W0223 # (see https://bugs.python.org/issue31844)</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Internal class to extract text from HTML&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">HTMLParser</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">result</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tags</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">def</span> <span class="nf">handle_starttag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">tag</span><span class="p">,</span> <span class="n">attrs</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tags</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">tag</span><span class="p">)</span>
<span class="k">if</span> <span class="n">tag</span> <span class="o">==</span> <span class="s1">&#39;br&#39;</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">result</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">&#39; &#39;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">handle_endtag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">tag</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">tags</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">if</span> <span class="n">tag</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">tags</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]:</span>
<span class="k">raise</span> <span class="n">_HTMLTextExtractorException</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tags</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">is_valid_tag</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">tags</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">tags</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">_BLOCKED_TAGS</span>
<span class="k">def</span> <span class="nf">handle_data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_valid_tag</span><span class="p">():</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">result</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">handle_charref</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_valid_tag</span><span class="p">():</span>
<span class="k">return</span>
<span class="k">if</span> <span class="n">name</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">&#39;x&#39;</span><span class="p">,</span> <span class="s1">&#39;X&#39;</span><span class="p">):</span>
<span class="n">codepoint</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">name</span><span class="p">[</span><span class="mi">1</span><span class="p">:],</span> <span class="mi">16</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">codepoint</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">result</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">chr</span><span class="p">(</span><span class="n">codepoint</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">handle_entityref</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_valid_tag</span><span class="p">():</span>
<span class="k">return</span>
<span class="c1"># codepoint = htmlentitydefs.name2codepoint[name]</span>
<span class="c1"># self.result.append(chr(codepoint))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">result</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_text</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="s1">&#39;&#39;</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">result</span><span class="p">)</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span>
<div class="viewcode-block" id="html_to_text"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.html_to_text">[docs]</a><span class="k">def</span> <span class="nf">html_to_text</span><span class="p">(</span><span class="n">html_str</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">str</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Extract text from a HTML string</span>
<span class="sd"> Args:</span>
<span class="sd"> * html_str (str): string HTML</span>
<span class="sd"> Returns:</span>
<span class="sd"> * str: extracted text</span>
<span class="sd"> Examples:</span>
<span class="sd"> &gt;&gt;&gt; html_to_text(&#39;Example &lt;span id=&quot;42&quot;&gt;#2&lt;/span&gt;&#39;)</span>
<span class="sd"> &#39;Example #2&#39;</span>
<span class="sd"> &gt;&gt;&gt; html_to_text(&#39;&lt;style&gt;.span { color: red; }&lt;/style&gt;&lt;span&gt;Example&lt;/span&gt;&#39;)</span>
<span class="sd"> &#39;Example&#39;</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">html_str</span> <span class="o">=</span> <span class="n">html_str</span><span class="o">.</span><span class="n">replace</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="s1">&#39; &#39;</span><span class="p">)</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">&#39;</span><span class="se">\r</span><span class="s1">&#39;</span><span class="p">,</span> <span class="s1">&#39; &#39;</span><span class="p">)</span>
<span class="n">html_str</span> <span class="o">=</span> <span class="s1">&#39; &#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">html_str</span><span class="o">.</span><span class="n">split</span><span class="p">())</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">_HTMLTextExtractor</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">s</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="n">html_str</span><span class="p">)</span>
<span class="k">except</span> <span class="n">_HTMLTextExtractorException</span><span class="p">:</span>
<span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">&quot;HTMLTextExtractor: invalid HTML</span><span class="se">\n</span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">html_str</span><span class="p">)</span>
<span class="k">return</span> <span class="n">s</span><span class="o">.</span><span class="n">get_text</span><span class="p">()</span></div>
<div class="viewcode-block" id="extract_text"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.extract_text">[docs]</a><span class="k">def</span> <span class="nf">extract_text</span><span class="p">(</span><span class="n">xpath_results</span><span class="p">,</span> <span class="n">allow_none</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Extract text from a lxml result</span>
<span class="sd"> * if xpath_results is list, extract the text from each result and concat the list</span>
<span class="sd"> * if xpath_results is a xml element, extract all the text node from it</span>
<span class="sd"> ( text_content() method from lxml )</span>
<span class="sd"> * if xpath_results is a string element, then it&#39;s already done</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">xpath_results</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span>
<span class="c1"># it&#39;s list of result : concat everything using recursive call</span>
<span class="n">result</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span>
<span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">xpath_results</span><span class="p">:</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">result</span> <span class="o">+</span> <span class="p">(</span><span class="n">extract_text</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
<span class="k">return</span> <span class="n">result</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">xpath_results</span><span class="p">,</span> <span class="n">ElementBase</span><span class="p">):</span>
<span class="c1"># it&#39;s a element</span>
<span class="n">text</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">html</span><span class="o">.</span><span class="n">tostring</span><span class="p">(</span><span class="n">xpath_results</span><span class="p">,</span> <span class="n">encoding</span><span class="o">=</span><span class="s1">&#39;unicode&#39;</span><span class="p">,</span> <span class="n">method</span><span class="o">=</span><span class="s1">&#39;text&#39;</span><span class="p">,</span> <span class="n">with_tail</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
<span class="n">text</span> <span class="o">=</span> <span class="n">text</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span><span class="o">.</span><span class="n">replace</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="s1">&#39; &#39;</span><span class="p">)</span>
<span class="k">return</span> <span class="s1">&#39; &#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">text</span><span class="o">.</span><span class="n">split</span><span class="p">())</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">xpath_results</span><span class="p">,</span> <span class="p">(</span><span class="n">_ElementStringResult</span><span class="p">,</span> <span class="n">_ElementUnicodeResult</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="n">Number</span><span class="p">,</span> <span class="nb">bool</span><span class="p">)):</span>
<span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="n">xpath_results</span><span class="p">)</span>
<span class="k">if</span> <span class="n">xpath_results</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">allow_none</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">xpath_results</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">allow_none</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">&#39;extract_text(None, allow_none=False)&#39;</span><span class="p">)</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">&#39;unsupported type&#39;</span><span class="p">)</span></div>
<div class="viewcode-block" id="normalize_url"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.normalize_url">[docs]</a><span class="k">def</span> <span class="nf">normalize_url</span><span class="p">(</span><span class="n">url</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">base_url</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">str</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Normalize URL: add protocol, join URL with base_url, add trailing slash if there is no path</span>
<span class="sd"> Args:</span>
<span class="sd"> * url (str): Relative URL</span>
<span class="sd"> * base_url (str): Base URL, it must be an absolute URL.</span>
<span class="sd"> Example:</span>
<span class="sd"> &gt;&gt;&gt; normalize_url(&#39;https://example.com&#39;, &#39;http://example.com/&#39;)</span>
<span class="sd"> &#39;https://example.com/&#39;</span>
<span class="sd"> &gt;&gt;&gt; normalize_url(&#39;//example.com&#39;, &#39;http://example.com/&#39;)</span>
<span class="sd"> &#39;http://example.com/&#39;</span>
<span class="sd"> &gt;&gt;&gt; normalize_url(&#39;//example.com&#39;, &#39;https://example.com/&#39;)</span>
<span class="sd"> &#39;https://example.com/&#39;</span>
<span class="sd"> &gt;&gt;&gt; normalize_url(&#39;/path?a=1&#39;, &#39;https://example.com&#39;)</span>
<span class="sd"> &#39;https://example.com/path?a=1&#39;</span>
<span class="sd"> &gt;&gt;&gt; normalize_url(&#39;&#39;, &#39;https://example.com&#39;)</span>
<span class="sd"> &#39;https://example.com/&#39;</span>
<span class="sd"> &gt;&gt;&gt; normalize_url(&#39;/test&#39;, &#39;/path&#39;)</span>
<span class="sd"> raise ValueError</span>
<span class="sd"> Raises:</span>
<span class="sd"> * lxml.etree.ParserError</span>
<span class="sd"> Returns:</span>
<span class="sd"> * str: normalized URL</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="n">url</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="c1"># add http or https to this kind of url //example.com/</span>
<span class="n">parsed_search_url</span> <span class="o">=</span> <span class="n">urlparse</span><span class="p">(</span><span class="n">base_url</span><span class="p">)</span>
<span class="n">url</span> <span class="o">=</span> <span class="s1">&#39;</span><span class="si">{0}</span><span class="s1">:</span><span class="si">{1}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">parsed_search_url</span><span class="o">.</span><span class="n">scheme</span> <span class="ow">or</span> <span class="s1">&#39;http&#39;</span><span class="p">,</span> <span class="n">url</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">url</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="c1"># fix relative url to the search engine</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">urljoin</span><span class="p">(</span><span class="n">base_url</span><span class="p">,</span> <span class="n">url</span><span class="p">)</span>
<span class="c1"># fix relative urls that fall through the crack</span>
<span class="k">if</span> <span class="s1">&#39;://&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">url</span><span class="p">:</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">urljoin</span><span class="p">(</span><span class="n">base_url</span><span class="p">,</span> <span class="n">url</span><span class="p">)</span>
<span class="n">parsed_url</span> <span class="o">=</span> <span class="n">urlparse</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="c1"># add a / at this end of the url if there is no path</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">parsed_url</span><span class="o">.</span><span class="n">netloc</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">&#39;Cannot parse url&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">parsed_url</span><span class="o">.</span><span class="n">path</span><span class="p">:</span>
<span class="n">url</span> <span class="o">+=</span> <span class="s1">&#39;/&#39;</span>
<span class="k">return</span> <span class="n">url</span></div>
<div class="viewcode-block" id="extract_url"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.extract_url">[docs]</a><span class="k">def</span> <span class="nf">extract_url</span><span class="p">(</span><span class="n">xpath_results</span><span class="p">,</span> <span class="n">base_url</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">str</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Extract and normalize URL from lxml Element</span>
<span class="sd"> Args:</span>
<span class="sd"> * xpath_results (Union[List[html.HtmlElement], html.HtmlElement]): lxml Element(s)</span>
<span class="sd"> * base_url (str): Base URL</span>
<span class="sd"> Example:</span>
<span class="sd"> &gt;&gt;&gt; def f(s, search_url):</span>
<span class="sd"> &gt;&gt;&gt; return searx.utils.extract_url(html.fromstring(s), search_url)</span>
<span class="sd"> &gt;&gt;&gt; f(&#39;&lt;span id=&quot;42&quot;&gt;https://example.com&lt;/span&gt;&#39;, &#39;http://example.com/&#39;)</span>
<span class="sd"> &#39;https://example.com/&#39;</span>
<span class="sd"> &gt;&gt;&gt; f(&#39;https://example.com&#39;, &#39;http://example.com/&#39;)</span>
<span class="sd"> &#39;https://example.com/&#39;</span>
<span class="sd"> &gt;&gt;&gt; f(&#39;//example.com&#39;, &#39;http://example.com/&#39;)</span>
<span class="sd"> &#39;http://example.com/&#39;</span>
<span class="sd"> &gt;&gt;&gt; f(&#39;//example.com&#39;, &#39;https://example.com/&#39;)</span>
<span class="sd"> &#39;https://example.com/&#39;</span>
<span class="sd"> &gt;&gt;&gt; f(&#39;/path?a=1&#39;, &#39;https://example.com&#39;)</span>
<span class="sd"> &#39;https://example.com/path?a=1&#39;</span>
<span class="sd"> &gt;&gt;&gt; f(&#39;&#39;, &#39;https://example.com&#39;)</span>
<span class="sd"> raise lxml.etree.ParserError</span>
<span class="sd"> &gt;&gt;&gt; searx.utils.extract_url([], &#39;https://example.com&#39;)</span>
<span class="sd"> raise ValueError</span>
<span class="sd"> Raises:</span>
<span class="sd"> * ValueError</span>
<span class="sd"> * lxml.etree.ParserError</span>
<span class="sd"> Returns:</span>
<span class="sd"> * str: normalized URL</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="n">xpath_results</span> <span class="o">==</span> <span class="p">[]:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">&#39;Empty url resultset&#39;</span><span class="p">)</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">extract_text</span><span class="p">(</span><span class="n">xpath_results</span><span class="p">)</span>
<span class="k">if</span> <span class="n">url</span><span class="p">:</span>
<span class="k">return</span> <span class="n">normalize_url</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">base_url</span><span class="p">)</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">&#39;URL not found&#39;</span><span class="p">)</span></div>
<div class="viewcode-block" id="dict_subset"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.dict_subset">[docs]</a><span class="k">def</span> <span class="nf">dict_subset</span><span class="p">(</span><span class="n">dictionary</span><span class="p">:</span> <span class="n">MutableMapping</span><span class="p">,</span> <span class="n">properties</span><span class="p">:</span> <span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">])</span> <span class="o">-&gt;</span> <span class="n">Dict</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Extract a subset of a dict</span>
<span class="sd"> Examples:</span>
<span class="sd"> &gt;&gt;&gt; dict_subset({&#39;A&#39;: &#39;a&#39;, &#39;B&#39;: &#39;b&#39;, &#39;C&#39;: &#39;c&#39;}, [&#39;A&#39;, &#39;C&#39;])</span>
<span class="sd"> {&#39;A&#39;: &#39;a&#39;, &#39;C&#39;: &#39;c&#39;}</span>
<span class="sd"> &gt;&gt;&gt; &gt;&gt; dict_subset({&#39;A&#39;: &#39;a&#39;, &#39;B&#39;: &#39;b&#39;, &#39;C&#39;: &#39;c&#39;}, [&#39;A&#39;, &#39;D&#39;])</span>
<span class="sd"> {&#39;A&#39;: &#39;a&#39;}</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="n">dictionary</span><span class="p">[</span><span class="n">k</span><span class="p">]</span> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">properties</span> <span class="k">if</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">dictionary</span><span class="p">}</span></div>
<div class="viewcode-block" id="get_torrent_size"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.get_torrent_size">[docs]</a><span class="k">def</span> <span class="nf">get_torrent_size</span><span class="p">(</span><span class="n">filesize</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">filesize_multiplier</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</span><span class="p">]:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Args:</span>
<span class="sd"> * filesize (str): size</span>
<span class="sd"> * filesize_multiplier (str): TB, GB, .... TiB, GiB...</span>
<span class="sd"> Returns:</span>
<span class="sd"> * int: number of bytes</span>
<span class="sd"> Example:</span>
<span class="sd"> &gt;&gt;&gt; get_torrent_size(&#39;5&#39;, &#39;GB&#39;)</span>
<span class="sd"> 5368709120</span>
<span class="sd"> &gt;&gt;&gt; get_torrent_size(&#39;3.14&#39;, &#39;MiB&#39;)</span>
<span class="sd"> 3140000</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">multiplier</span> <span class="o">=</span> <span class="n">_STORAGE_UNIT_VALUE</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">filesize_multiplier</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">int</span><span class="p">(</span><span class="nb">float</span><span class="p">(</span><span class="n">filesize</span><span class="p">)</span> <span class="o">*</span> <span class="n">multiplier</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">ValueError</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span></div>
<div class="viewcode-block" id="convert_str_to_int"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.convert_str_to_int">[docs]</a><span class="k">def</span> <span class="nf">convert_str_to_int</span><span class="p">(</span><span class="n">number_str</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">int</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Convert number_str to int or 0 if number_str is not a number.&quot;&quot;&quot;</span>
<span class="k">if</span> <span class="n">number_str</span><span class="o">.</span><span class="n">isdigit</span><span class="p">():</span>
<span class="k">return</span> <span class="nb">int</span><span class="p">(</span><span class="n">number_str</span><span class="p">)</span>
<span class="k">return</span> <span class="mi">0</span></div>
<div class="viewcode-block" id="int_or_zero"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.int_or_zero">[docs]</a><span class="k">def</span> <span class="nf">int_or_zero</span><span class="p">(</span><span class="n">num</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="nb">str</span><span class="p">])</span> <span class="o">-&gt;</span> <span class="nb">int</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Convert num to int or 0. num can be either a str or a list.</span>
<span class="sd"> If num is a list, the first element is converted to int (or return 0 if the list is empty).</span>
<span class="sd"> If num is a str, see convert_str_to_int</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">num</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">num</span><span class="p">)</span> <span class="o">&lt;</span> <span class="mi">1</span><span class="p">:</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="n">num</span> <span class="o">=</span> <span class="n">num</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">return</span> <span class="n">convert_str_to_int</span><span class="p">(</span><span class="n">num</span><span class="p">)</span></div>
<div class="viewcode-block" id="is_valid_lang"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.is_valid_lang">[docs]</a><span class="k">def</span> <span class="nf">is_valid_lang</span><span class="p">(</span><span class="n">lang</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">bool</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]]:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Return language code and name if lang describe a language.</span>
<span class="sd"> Examples:</span>
<span class="sd"> &gt;&gt;&gt; is_valid_lang(&#39;zz&#39;)</span>
<span class="sd"> None</span>
<span class="sd"> &gt;&gt;&gt; is_valid_lang(&#39;uk&#39;)</span>
<span class="sd"> (True, &#39;uk&#39;, &#39;ukrainian&#39;)</span>
<span class="sd"> &gt;&gt;&gt; is_valid_lang(b&#39;uk&#39;)</span>
<span class="sd"> (True, &#39;uk&#39;, &#39;ukrainian&#39;)</span>
<span class="sd"> &gt;&gt;&gt; is_valid_lang(&#39;en&#39;)</span>
<span class="sd"> (True, &#39;en&#39;, &#39;english&#39;)</span>
<span class="sd"> &gt;&gt;&gt; searx.utils.is_valid_lang(&#39;Español&#39;)</span>
<span class="sd"> (True, &#39;es&#39;, &#39;spanish&#39;)</span>
<span class="sd"> &gt;&gt;&gt; searx.utils.is_valid_lang(&#39;Spanish&#39;)</span>
<span class="sd"> (True, &#39;es&#39;, &#39;spanish&#39;)</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">lang</span><span class="p">,</span> <span class="nb">bytes</span><span class="p">):</span>
<span class="n">lang</span> <span class="o">=</span> <span class="n">lang</span><span class="o">.</span><span class="n">decode</span><span class="p">()</span>
<span class="n">is_abbr</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">lang</span><span class="p">)</span> <span class="o">==</span> <span class="mi">2</span>
<span class="n">lang</span> <span class="o">=</span> <span class="n">lang</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
<span class="k">if</span> <span class="n">is_abbr</span><span class="p">:</span>
<span class="k">for</span> <span class="n">l</span> <span class="ow">in</span> <span class="n">language_codes</span><span class="p">:</span>
<span class="k">if</span> <span class="n">l</span><span class="p">[</span><span class="mi">0</span><span class="p">][:</span><span class="mi">2</span><span class="p">]</span> <span class="o">==</span> <span class="n">lang</span><span class="p">:</span>
<span class="k">return</span> <span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="n">l</span><span class="p">[</span><span class="mi">0</span><span class="p">][:</span><span class="mi">2</span><span class="p">],</span> <span class="n">l</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span><span class="o">.</span><span class="n">lower</span><span class="p">())</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">for</span> <span class="n">l</span> <span class="ow">in</span> <span class="n">language_codes</span><span class="p">:</span>
<span class="k">if</span> <span class="n">l</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="n">lang</span> <span class="ow">or</span> <span class="n">l</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="n">lang</span><span class="p">:</span>
<span class="k">return</span> <span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="n">l</span><span class="p">[</span><span class="mi">0</span><span class="p">][:</span><span class="mi">2</span><span class="p">],</span> <span class="n">l</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span><span class="o">.</span><span class="n">lower</span><span class="p">())</span>
<span class="k">return</span> <span class="kc">None</span></div>
<span class="k">def</span> <span class="nf">_get_lang_to_lc_dict</span><span class="p">(</span><span class="n">lang_list</span><span class="p">:</span> <span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">])</span> <span class="o">-&gt;</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]:</span>
<span class="n">key</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">lang_list</span><span class="p">)</span>
<span class="n">value</span> <span class="o">=</span> <span class="n">_LANG_TO_LC_CACHE</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">value</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">value</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">for</span> <span class="n">lang</span> <span class="ow">in</span> <span class="n">lang_list</span><span class="p">:</span>
<span class="n">value</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">lang</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;-&#39;</span><span class="p">)[</span><span class="mi">0</span><span class="p">],</span> <span class="n">lang</span><span class="p">)</span>
<span class="n">_LANG_TO_LC_CACHE</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span>
<span class="k">return</span> <span class="n">value</span>
<span class="c1"># babel&#39;s get_global contains all sorts of miscellaneous locale and territory related data</span>
<span class="c1"># see get_global in: https://github.com/python-babel/babel/blob/master/babel/core.py</span>
<span class="k">def</span> <span class="nf">_get_from_babel</span><span class="p">(</span><span class="n">lang_code</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span>
<span class="n">match</span> <span class="o">=</span> <span class="n">get_global</span><span class="p">(</span><span class="n">key</span><span class="p">)</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">lang_code</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="c1"># for some keys, such as territory_aliases, match may be a list</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">match</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="k">return</span> <span class="n">match</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">return</span> <span class="n">match</span>
<span class="k">def</span> <span class="nf">_match_language</span><span class="p">(</span><span class="n">lang_code</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">lang_list</span><span class="o">=</span><span class="p">[],</span> <span class="n">custom_aliases</span><span class="o">=</span><span class="p">{})</span> <span class="o">-&gt;</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> <span class="c1"># pylint: disable=W0102</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;auxiliary function to match lang_code in lang_list&quot;&quot;&quot;</span>
<span class="c1"># replace language code with a custom alias if necessary</span>
<span class="k">if</span> <span class="n">lang_code</span> <span class="ow">in</span> <span class="n">custom_aliases</span><span class="p">:</span>
<span class="n">lang_code</span> <span class="o">=</span> <span class="n">custom_aliases</span><span class="p">[</span><span class="n">lang_code</span><span class="p">]</span>
<span class="k">if</span> <span class="n">lang_code</span> <span class="ow">in</span> <span class="n">lang_list</span><span class="p">:</span>
<span class="k">return</span> <span class="n">lang_code</span>
<span class="c1"># try to get the most likely country for this language</span>
<span class="n">subtags</span> <span class="o">=</span> <span class="n">_get_from_babel</span><span class="p">(</span><span class="n">lang_code</span><span class="p">,</span> <span class="s1">&#39;likely_subtags&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">subtags</span><span class="p">:</span>
<span class="k">if</span> <span class="n">subtags</span> <span class="ow">in</span> <span class="n">lang_list</span><span class="p">:</span>
<span class="k">return</span> <span class="n">subtags</span>
<span class="n">subtag_parts</span> <span class="o">=</span> <span class="n">subtags</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;-&#39;</span><span class="p">)</span>
<span class="n">new_code</span> <span class="o">=</span> <span class="n">subtag_parts</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="s1">&#39;-&#39;</span> <span class="o">+</span> <span class="n">subtag_parts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
<span class="k">if</span> <span class="n">new_code</span> <span class="ow">in</span> <span class="n">custom_aliases</span><span class="p">:</span>
<span class="n">new_code</span> <span class="o">=</span> <span class="n">custom_aliases</span><span class="p">[</span><span class="n">new_code</span><span class="p">]</span>
<span class="k">if</span> <span class="n">new_code</span> <span class="ow">in</span> <span class="n">lang_list</span><span class="p">:</span>
<span class="k">return</span> <span class="n">new_code</span>
<span class="c1"># try to get the any supported country for this language</span>
<span class="k">return</span> <span class="n">_get_lang_to_lc_dict</span><span class="p">(</span><span class="n">lang_list</span><span class="p">)</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">lang_code</span><span class="p">)</span>
<div class="viewcode-block" id="match_language"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.match_language">[docs]</a><span class="k">def</span> <span class="nf">match_language</span><span class="p">(</span> <span class="c1"># pylint: disable=W0102</span>
<span class="n">locale_code</span><span class="p">,</span> <span class="n">lang_list</span><span class="o">=</span><span class="p">[],</span> <span class="n">custom_aliases</span><span class="o">=</span><span class="p">{},</span> <span class="n">fallback</span><span class="p">:</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="s1">&#39;en-US&#39;</span>
<span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;get the language code from lang_list that best matches locale_code&quot;&quot;&quot;</span>
<span class="c1"># try to get language from given locale_code</span>
<span class="n">language</span> <span class="o">=</span> <span class="n">_match_language</span><span class="p">(</span><span class="n">locale_code</span><span class="p">,</span> <span class="n">lang_list</span><span class="p">,</span> <span class="n">custom_aliases</span><span class="p">)</span>
<span class="k">if</span> <span class="n">language</span><span class="p">:</span>
<span class="k">return</span> <span class="n">language</span>
<span class="n">locale_parts</span> <span class="o">=</span> <span class="n">locale_code</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;-&#39;</span><span class="p">)</span>
<span class="n">lang_code</span> <span class="o">=</span> <span class="n">locale_parts</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="c1"># if locale_code has script, try matching without it</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">locale_parts</span><span class="p">)</span> <span class="o">&gt;</span> <span class="mi">2</span><span class="p">:</span>
<span class="n">language</span> <span class="o">=</span> <span class="n">_match_language</span><span class="p">(</span><span class="n">lang_code</span> <span class="o">+</span> <span class="s1">&#39;-&#39;</span> <span class="o">+</span> <span class="n">locale_parts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="n">lang_list</span><span class="p">,</span> <span class="n">custom_aliases</span><span class="p">)</span>
<span class="k">if</span> <span class="n">language</span><span class="p">:</span>
<span class="k">return</span> <span class="n">language</span>
<span class="c1"># try to get language using an equivalent country code</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">locale_parts</span><span class="p">)</span> <span class="o">&gt;</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">country_alias</span> <span class="o">=</span> <span class="n">_get_from_babel</span><span class="p">(</span><span class="n">locale_parts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="s1">&#39;territory_aliases&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">country_alias</span><span class="p">:</span>
<span class="n">language</span> <span class="o">=</span> <span class="n">_match_language</span><span class="p">(</span><span class="n">lang_code</span> <span class="o">+</span> <span class="s1">&#39;-&#39;</span> <span class="o">+</span> <span class="n">country_alias</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">lang_list</span><span class="p">,</span> <span class="n">custom_aliases</span><span class="p">)</span>
<span class="k">if</span> <span class="n">language</span><span class="p">:</span>
<span class="k">return</span> <span class="n">language</span>
<span class="c1"># try to get language using an equivalent language code</span>
<span class="n">alias</span> <span class="o">=</span> <span class="n">_get_from_babel</span><span class="p">(</span><span class="n">lang_code</span><span class="p">,</span> <span class="s1">&#39;language_aliases&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">alias</span><span class="p">:</span>
<span class="n">language</span> <span class="o">=</span> <span class="n">_match_language</span><span class="p">(</span><span class="n">alias</span><span class="p">,</span> <span class="n">lang_list</span><span class="p">,</span> <span class="n">custom_aliases</span><span class="p">)</span>
<span class="k">if</span> <span class="n">language</span><span class="p">:</span>
<span class="k">return</span> <span class="n">language</span>
<span class="k">if</span> <span class="n">lang_code</span> <span class="o">!=</span> <span class="n">locale_code</span><span class="p">:</span>
<span class="c1"># try to get language from given language without giving the country</span>
<span class="n">language</span> <span class="o">=</span> <span class="n">_match_language</span><span class="p">(</span><span class="n">lang_code</span><span class="p">,</span> <span class="n">lang_list</span><span class="p">,</span> <span class="n">custom_aliases</span><span class="p">)</span>
<span class="k">return</span> <span class="n">language</span> <span class="ow">or</span> <span class="n">fallback</span></div>
<span class="k">def</span> <span class="nf">load_module</span><span class="p">(</span><span class="n">filename</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">module_dir</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">types</span><span class="o">.</span><span class="n">ModuleType</span><span class="p">:</span>
<span class="n">modname</span> <span class="o">=</span> <span class="n">splitext</span><span class="p">(</span><span class="n">filename</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">modpath</span> <span class="o">=</span> <span class="n">join</span><span class="p">(</span><span class="n">module_dir</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span>
<span class="c1"># and https://docs.python.org/3/library/importlib.html#importing-a-source-file-directly</span>
<span class="n">spec</span> <span class="o">=</span> <span class="n">importlib</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">spec_from_file_location</span><span class="p">(</span><span class="n">modname</span><span class="p">,</span> <span class="n">modpath</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">spec</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Error loading &#39;</span><span class="si">{</span><span class="n">modpath</span><span class="si">}</span><span class="s2">&#39; module&quot;</span><span class="p">)</span>
<span class="n">module</span> <span class="o">=</span> <span class="n">importlib</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">module_from_spec</span><span class="p">(</span><span class="n">spec</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">spec</span><span class="o">.</span><span class="n">loader</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Error loading &#39;</span><span class="si">{</span><span class="n">modpath</span><span class="si">}</span><span class="s2">&#39; module&quot;</span><span class="p">)</span>
<span class="n">spec</span><span class="o">.</span><span class="n">loader</span><span class="o">.</span><span class="n">exec_module</span><span class="p">(</span><span class="n">module</span><span class="p">)</span>
<span class="k">return</span> <span class="n">module</span>
<div class="viewcode-block" id="to_string"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.to_string">[docs]</a><span class="k">def</span> <span class="nf">to_string</span><span class="p">(</span><span class="n">obj</span><span class="p">:</span> <span class="n">Any</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">str</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Convert obj to its string representation.&quot;&quot;&quot;</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="k">return</span> <span class="n">obj</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="s1">&#39;__str__&#39;</span><span class="p">):</span>
<span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">repr</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span></div>
<div class="viewcode-block" id="ecma_unescape"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.ecma_unescape">[docs]</a><span class="k">def</span> <span class="nf">ecma_unescape</span><span class="p">(</span><span class="n">string</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">str</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Python implementation of the unescape javascript function</span>
<span class="sd"> https://www.ecma-international.org/ecma-262/6.0/#sec-unescape-string</span>
<span class="sd"> https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/unescape</span>
<span class="sd"> Examples:</span>
<span class="sd"> &gt;&gt;&gt; ecma_unescape(&#39;%u5409&#39;)</span>
<span class="sd"> &#39;吉&#39;</span>
<span class="sd"> &gt;&gt;&gt; ecma_unescape(&#39;%20&#39;)</span>
<span class="sd"> &#39; &#39;</span>
<span class="sd"> &gt;&gt;&gt; ecma_unescape(&#39;%F3&#39;)</span>
<span class="sd"> &#39;ó&#39;</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="c1"># &quot;%u5409&quot; becomes &quot;吉&quot;</span>
<span class="n">string</span> <span class="o">=</span> <span class="n">_ECMA_UNESCAPE4_RE</span><span class="o">.</span><span class="n">sub</span><span class="p">(</span><span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="nb">chr</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="mi">16</span><span class="p">)),</span> <span class="n">string</span><span class="p">)</span>
<span class="c1"># &quot;%20&quot; becomes &quot; &quot;, &quot;%F3&quot; becomes &quot;ó&quot;</span>
<span class="n">string</span> <span class="o">=</span> <span class="n">_ECMA_UNESCAPE2_RE</span><span class="o">.</span><span class="n">sub</span><span class="p">(</span><span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="nb">chr</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="mi">16</span><span class="p">)),</span> <span class="n">string</span><span class="p">)</span>
<span class="k">return</span> <span class="n">string</span></div>
<span class="k">def</span> <span class="nf">get_string_replaces_function</span><span class="p">(</span><span class="n">replaces</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">])</span> <span class="o">-&gt;</span> <span class="n">Callable</span><span class="p">[[</span><span class="nb">str</span><span class="p">],</span> <span class="nb">str</span><span class="p">]:</span>
<span class="n">rep</span> <span class="o">=</span> <span class="p">{</span><span class="n">re</span><span class="o">.</span><span class="n">escape</span><span class="p">(</span><span class="n">k</span><span class="p">):</span> <span class="n">v</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">replaces</span><span class="o">.</span><span class="n">items</span><span class="p">()}</span>
<span class="n">pattern</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="s2">&quot;|&quot;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">rep</span><span class="o">.</span><span class="n">keys</span><span class="p">()))</span>
<span class="k">def</span> <span class="nf">func</span><span class="p">(</span><span class="n">text</span><span class="p">):</span>
<span class="k">return</span> <span class="n">pattern</span><span class="o">.</span><span class="n">sub</span><span class="p">(</span><span class="k">lambda</span> <span class="n">m</span><span class="p">:</span> <span class="n">rep</span><span class="p">[</span><span class="n">re</span><span class="o">.</span><span class="n">escape</span><span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">0</span><span class="p">))],</span> <span class="n">text</span><span class="p">)</span>
<span class="k">return</span> <span class="n">func</span>
<div class="viewcode-block" id="get_engine_from_settings"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.get_engine_from_settings">[docs]</a><span class="k">def</span> <span class="nf">get_engine_from_settings</span><span class="p">(</span><span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Dict</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Return engine configuration from settings.yml of a given engine name&quot;&quot;&quot;</span>
<span class="k">if</span> <span class="s1">&#39;engines&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">settings</span><span class="p">:</span>
<span class="k">return</span> <span class="p">{}</span>
<span class="k">for</span> <span class="n">engine</span> <span class="ow">in</span> <span class="n">settings</span><span class="p">[</span><span class="s1">&#39;engines&#39;</span><span class="p">]:</span>
<span class="k">if</span> <span class="s1">&#39;name&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">engine</span><span class="p">:</span>
<span class="k">continue</span>
<span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="n">engine</span><span class="p">[</span><span class="s1">&#39;name&#39;</span><span class="p">]:</span>
<span class="k">return</span> <span class="n">engine</span>
<span class="k">return</span> <span class="p">{}</span></div>
<div class="viewcode-block" id="get_xpath"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.get_xpath">[docs]</a><span class="k">def</span> <span class="nf">get_xpath</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">:</span> <span class="n">XPathSpecType</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">XPath</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Return cached compiled XPath</span>
<span class="sd"> There is no thread lock.</span>
<span class="sd"> Worst case scenario, xpath_str is compiled more than one time.</span>
<span class="sd"> Args:</span>
<span class="sd"> * xpath_spec (str|lxml.etree.XPath): XPath as a str or lxml.etree.XPath</span>
<span class="sd"> Returns:</span>
<span class="sd"> * result (bool, float, list, str): Results.</span>
<span class="sd"> Raises:</span>
<span class="sd"> * TypeError: Raise when xpath_spec is neither a str nor a lxml.etree.XPath</span>
<span class="sd"> * SearxXPathSyntaxException: Raise when there is a syntax error in the XPath</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">_XPATH_CACHE</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">result</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">XPath</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">)</span>
<span class="k">except</span> <span class="n">XPathSyntaxError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">SearxXPathSyntaxException</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">,</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">msg</span><span class="p">))</span> <span class="kn">from</span> <span class="nn">e</span>
<span class="n">_XPATH_CACHE</span><span class="p">[</span><span class="n">xpath_spec</span><span class="p">]</span> <span class="o">=</span> <span class="n">result</span>
<span class="k">return</span> <span class="n">result</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">,</span> <span class="n">XPath</span><span class="p">):</span>
<span class="k">return</span> <span class="n">xpath_spec</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">&#39;xpath_spec must be either a str or a lxml.etree.XPath&#39;</span><span class="p">)</span></div>
<div class="viewcode-block" id="eval_xpath"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.eval_xpath">[docs]</a><span class="k">def</span> <span class="nf">eval_xpath</span><span class="p">(</span><span class="n">element</span><span class="p">:</span> <span class="n">ElementBase</span><span class="p">,</span> <span class="n">xpath_spec</span><span class="p">:</span> <span class="n">XPathSpecType</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Equivalent of element.xpath(xpath_str) but compile xpath_str once for all.</span>
<span class="sd"> See https://lxml.de/xpathxslt.html#xpath-return-values</span>
<span class="sd"> Args:</span>
<span class="sd"> * element (ElementBase): [description]</span>
<span class="sd"> * xpath_spec (str|lxml.etree.XPath): XPath as a str or lxml.etree.XPath</span>
<span class="sd"> Returns:</span>
<span class="sd"> * result (bool, float, list, str): Results.</span>
<span class="sd"> Raises:</span>
<span class="sd"> * TypeError: Raise when xpath_spec is neither a str nor a lxml.etree.XPath</span>
<span class="sd"> * SearxXPathSyntaxException: Raise when there is a syntax error in the XPath</span>
<span class="sd"> * SearxEngineXPathException: Raise when the XPath can&#39;t be evaluated.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">xpath</span> <span class="o">=</span> <span class="n">get_xpath</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">return</span> <span class="n">xpath</span><span class="p">(</span><span class="n">element</span><span class="p">)</span>
<span class="k">except</span> <span class="n">XPathError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="n">arg</span> <span class="o">=</span> <span class="s1">&#39; &#39;</span><span class="o">.</span><span class="n">join</span><span class="p">([</span><span class="nb">str</span><span class="p">(</span><span class="n">i</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">e</span><span class="o">.</span><span class="n">args</span><span class="p">])</span>
<span class="k">raise</span> <span class="n">SearxEngineXPathException</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">,</span> <span class="n">arg</span><span class="p">)</span> <span class="kn">from</span> <span class="nn">e</span></div>
<div class="viewcode-block" id="eval_xpath_list"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.eval_xpath_list">[docs]</a><span class="k">def</span> <span class="nf">eval_xpath_list</span><span class="p">(</span><span class="n">element</span><span class="p">:</span> <span class="n">ElementBase</span><span class="p">,</span> <span class="n">xpath_spec</span><span class="p">:</span> <span class="n">XPathSpecType</span><span class="p">,</span> <span class="n">min_len</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</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;Same as eval_xpath, check if the result is a list</span>
<span class="sd"> Args:</span>
<span class="sd"> * element (ElementBase): [description]</span>
<span class="sd"> * xpath_spec (str|lxml.etree.XPath): XPath as a str or lxml.etree.XPath</span>
<span class="sd"> * min_len (int, optional): [description]. Defaults to None.</span>
<span class="sd"> Raises:</span>
<span class="sd"> * TypeError: Raise when xpath_spec is neither a str nor a lxml.etree.XPath</span>
<span class="sd"> * SearxXPathSyntaxException: Raise when there is a syntax error in the XPath</span>
<span class="sd"> * SearxEngineXPathException: raise if the result is not a list</span>
<span class="sd"> Returns:</span>
<span class="sd"> * result (bool, float, list, str): Results.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">eval_xpath</span><span class="p">(</span><span class="n">element</span><span class="p">,</span> <span class="n">xpath_spec</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">result</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">SearxEngineXPathException</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">,</span> <span class="s1">&#39;the result is not a list&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">min_len</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">min_len</span> <span class="o">&gt;</span> <span class="nb">len</span><span class="p">(</span><span class="n">result</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">SearxEngineXPathException</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">,</span> <span class="s1">&#39;len(xpath_str) &lt; &#39;</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">min_len</span><span class="p">))</span>
<span class="k">return</span> <span class="n">result</span></div>
<div class="viewcode-block" id="eval_xpath_getindex"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.eval_xpath_getindex">[docs]</a><span class="k">def</span> <span class="nf">eval_xpath_getindex</span><span class="p">(</span><span class="n">elements</span><span class="p">:</span> <span class="n">ElementBase</span><span class="p">,</span> <span class="n">xpath_spec</span><span class="p">:</span> <span class="n">XPathSpecType</span><span class="p">,</span> <span class="n">index</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="n">_NOTSET</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;Call eval_xpath_list then get one element using the index parameter.</span>
<span class="sd"> If the index does not exist, either aise an exception is default is not set,</span>
<span class="sd"> other return the default value (can be None).</span>
<span class="sd"> Args:</span>
<span class="sd"> * elements (ElementBase): lxml element to apply the xpath.</span>
<span class="sd"> * xpath_spec (str|lxml.etree.XPath): XPath as a str or lxml.etree.XPath.</span>
<span class="sd"> * index (int): index to get</span>
<span class="sd"> * default (Object, optional): Defaults if index doesn&#39;t exist.</span>
<span class="sd"> Raises:</span>
<span class="sd"> * TypeError: Raise when xpath_spec is neither a str nor a lxml.etree.XPath</span>
<span class="sd"> * SearxXPathSyntaxException: Raise when there is a syntax error in the XPath</span>
<span class="sd"> * SearxEngineXPathException: if the index is not found. Also see eval_xpath.</span>
<span class="sd"> Returns:</span>
<span class="sd"> * result (bool, float, list, str): Results.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">eval_xpath_list</span><span class="p">(</span><span class="n">elements</span><span class="p">,</span> <span class="n">xpath_spec</span><span class="p">)</span>
<span class="k">if</span> <span class="o">-</span><span class="nb">len</span><span class="p">(</span><span class="n">result</span><span class="p">)</span> <span class="o">&lt;=</span> <span class="n">index</span> <span class="o">&lt;</span> <span class="nb">len</span><span class="p">(</span><span class="n">result</span><span class="p">):</span>
<span class="k">return</span> <span class="n">result</span><span class="p">[</span><span class="n">index</span><span class="p">]</span>
<span class="k">if</span> <span class="n">default</span> <span class="o">==</span> <span class="n">_NOTSET</span><span class="p">:</span>
<span class="c1"># raise an SearxEngineXPathException instead of IndexError</span>
<span class="c1"># to record xpath_spec</span>
<span class="k">raise</span> <span class="n">SearxEngineXPathException</span><span class="p">(</span><span class="n">xpath_spec</span><span class="p">,</span> <span class="s1">&#39;index &#39;</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">index</span><span class="p">)</span> <span class="o">+</span> <span class="s1">&#39; not found&#39;</span><span class="p">)</span>
<span class="k">return</span> <span class="n">default</span></div>
<span class="k">def</span> <span class="nf">_get_fasttext_model</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="s2">&quot;fasttext.FastText._FastText&quot;</span><span class="p">:</span>
<span class="k">global</span> <span class="n">_FASTTEXT_MODEL</span> <span class="c1"># pylint: disable=global-statement</span>
<span class="k">if</span> <span class="n">_FASTTEXT_MODEL</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">fasttext</span> <span class="c1"># pylint: disable=import-outside-toplevel</span>
<span class="c1"># Monkey patch: prevent fasttext from showing a (useless) warning when loading a model.</span>
<span class="n">fasttext</span><span class="o">.</span><span class="n">FastText</span><span class="o">.</span><span class="n">eprint</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="kc">None</span>
<span class="n">_FASTTEXT_MODEL</span> <span class="o">=</span> <span class="n">fasttext</span><span class="o">.</span><span class="n">load_model</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data_dir</span> <span class="o">/</span> <span class="s1">&#39;lid.176.ftz&#39;</span><span class="p">))</span>
<span class="k">return</span> <span class="n">_FASTTEXT_MODEL</span>
<div class="viewcode-block" id="detect_language"><a class="viewcode-back" href="../../src/searx.utils.html#searx.utils.detect_language">[docs]</a><span class="k">def</span> <span class="nf">detect_language</span><span class="p">(</span><span class="n">text</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">threshold</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mf">0.3</span><span class="p">,</span> <span class="n">min_probability</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mf">0.5</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;https://fasttext.cc/docs/en/language-identification.html&quot;&quot;&quot;</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">text</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">&#39;text must a str&#39;</span><span class="p">)</span>
<span class="n">r</span> <span class="o">=</span> <span class="n">_get_fasttext_model</span><span class="p">()</span><span class="o">.</span><span class="n">predict</span><span class="p">(</span><span class="n">text</span><span class="o">.</span><span class="n">replace</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="s1">&#39; &#39;</span><span class="p">),</span> <span class="n">k</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">threshold</span><span class="o">=</span><span class="n">threshold</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">r</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">r</span><span class="p">)</span> <span class="o">==</span> <span class="mi">2</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">r</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">r</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="ow">and</span> <span class="n">r</span><span class="p">[</span><span class="mi">1</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span> <span class="o">&gt;</span> <span class="n">min_probability</span><span class="p">:</span>
<span class="k">return</span> <span class="n">r</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;__label__&#39;</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span>
<span class="k">return</span> <span class="kc">None</span></div>
</pre></div>
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