title: Parsing pages with https in libxml2
body: <p>I try programming a webcrawler with <code>libxml2</code> for my HiWi job. To do so I have to parse also https pages from the web, but is this even possible?</p>
  <p>I can already parse a HTML page</p>
  <pre class="lang-cpp prettyprint-override"><code>    const char *new_url = &quot;http://xmlsoft.org/html/libxml-HTMLparser.html#htmlParserCtxtPtr&quot;;
      char buffer [200];
      htmlParserCtxtPtr _ctxtptr = htmlCreateMemoryParserCtxt(buffer,200);
      htmlDocPtr new_page_tree = htmlCtxtReadFile(_ctxtptr, new_url, NULL, 32);
  </code></pre>
  <p>But if I start with &quot;https&quot; for example</p>
  <pre><code>https://stackoverflow.com/
  </code></pre>
  <p>I get the warning</p>
  <pre><code>I/O warning : failed to load external entity
  </code></pre>
  <p>Is it, and if it is, how is it possible to get access to an https page with <code>libxml2</code>?</p>