  [399, push_paths.empty? ? {} : {&quot;link&quot; =&gt; push_paths.map{|p| &quot;&lt;#{p[0]}&gt;; rel=preload; as=#{p[1]}&quot;}.join(&quot;\n&quot;)}, []]
      end
    fastcgi.connect: ...
</code></pre>
</div>


<h3 id="http-client">Using the HTTP Client</h3>

<p>
Starting from version 1.7, a HTTP client API is provided.
HTTP requests issued through the API will be handled asynchronously; the client does not block the event loop of the HTTP server.
</p>

<div class="example">
<div class="caption">Example