title: How to implement a client for file uploading to a WSO2-ESB proxy service?
body: <p>I config an ESB proxy:</p>
  
  <pre><code>ESB Proxy --&gt; inSqquence --&gt; outSequence --&gt; clone --&gt; VFS
  </code></pre>
  
  <p>How to implement a client for file uploading to a WSO2-ESB proxy service?</p>