title: Is it possible to keep alive request using Google App Engine urlfetch.Client
body: <p>I will create an API using Google App Engine (on golang).
  API endpoint I will create publishes HTTP request.
  The problem is that HTTP request in this endpoint cannot be keep-alive.</p>
  
  <ul>
  <li>Why?</li>
  <li>Is it possible to use keep-alive?</li>
  </ul>
  
  <p>Sample source code is following.</p>
  
  <p><a href="https://github.com/suzuito/gae-example" rel="nofollow noreferrer">https://github.com/suzuito/gae-example</a></p>