'<tree parent_id="" err="" errCode="">
  <!-- folders in current folder -->
  <folderlist>
      <folder id="1" parentid="-1">Dir1</folder>
      <folder id="20" parentid="-1">Dir2</folder>
      <folder id="64" parentid="-1">Dir4</folder>
      <folder id="229" parentid="-1">Dir3</folder>
      <folder id="497" parentid="-1">Dir5</folder>
      <folder id="4" parentid="1">Dir1.1</folder>
      <folder id="5" parentid="1">Dir1.2</folder>
      <folder id="15" parentid="1">Dir1.3</folder>
      <folder id="16" parentid="1">Dir1.4</folder>
      <folder id="17" parentid="1">Dir1.5</folder>
      <folder id="18" parentid="1">Dir1.6</folder>
      <folder id="19" parentid="1">Dir1.7</folder>
      <folder id="65" parentid="1">Dir1.8</folder>
      <folder id="66" parentid="16">Dir1.4.1</folder>
      <folder id="68" parentid="16">Dir1.4.2</folder>
      <folder id="62" parentid="20">Dir2.1</folder>
      <folder id="67" parentid="66">Dir1.4.1.1</folder>
      <folder id="500" parentid="229">Dir5.1</folder>
      <folder id="498" parentid="497">Dir5.1</folder>
    </folderlist>
  <!-- files in current folder -->
  <filelist>
      <file id="95" parentid="0" filetype="jpg">25.jpg</file>
      <file id="96" parentid="0" filetype="jpg">25.jpg</file>
      <file id="47" parentid="4" filetype="jpg">25.jpg</file>
      <file id="6" parentid="1" filetype="text">File in Dir 1</file>
      <file id="64" parentid="1" filetype="jpg">heading2.jpg</file>
      <file id="46" parentid="1" filetype="jpg">heading2.jpg</file>
    </filelist>
</tree>'