title: aria2 Unrecognized URI or unsupported protocol When the url have space in it
body: <p>My input:</p>
  <pre><code>http://www.example.com/New file.zip
  </code></pre>
  <p>When try to download a remote file that have space in its url aria2 complains about it:</p>
  <pre><code>Exception caught
  Exception: [download_helper.cc:451] errorCode=1 Unrecognized URI or unsupported protocol: New
  </code></pre>