C++ recursively/iteratively search HTML file (using Boost C++)

I'm working on an application where I need to fetch a HTML file (from the web) and obtain a piece of information, by searching for a string.

I reckon it is more effective and easier to treat the HTML file as a XML file and iterate over the tags in the HTML file and match the content with a string.

Here is the HTML table I'm interested in:

<table width='100%' class='datatable' cellspacing='0' cellpadding='0'>
  <tr>
    <td>
    </td>
    <td width='30px'>
    </td>
    <td width='220px'>
    </td>
    <td width='50px'>
    </td>
  </tr>
  <tr>
    <td height='7' colspan='4'>
      <img src='/images/spacer.gif' width='1' height='7' border='0' alt=''>
    </td>
  </tr>
  <tr>
    <td width='170'>
      Aktiv tid: <!--This is a string I will search for.-->
    </td>
    <td colspan='3'>
      1 dag, 17:03:46 <!--This is a piece of information I need to obtain.-->
    </td>
  </tr>
  <tr>
    <td height='7' colspan='4'>
      <img src='/images/spacer.gif' width='1' height='7' border='0' alt=''>
    </td>
  </tr>
  <tr>
    <td width='170'>
      Bandbredd (upp/ned) [kbps/kbps]:
    </td>
    <td colspan='3'>
      1.058 / 21.373
    </td>
  </tr>
  <tr>
    <td height='7' colspan='4'>
      <img src='/images/spacer.gif' width='1' height='7' border='0' alt=''>
    </td>
  </tr>
  <tr>
    <td width='170'>
      Överförda data (skickade/mottagna) [GB/GB]: <!--This is another string I will search for.-->
    </td>
    <td colspan='3'>
      1,67 / 42,95 <!--This is another piece of information I need to obtain.-->
    </td>
  </tr>
</table>

So I will search for the <td> tags containing either of the following strings:

• Aktiv tid:


• Överförda data (skickade/mottagna) [GB/GB]:

After that I need to select the next <td> tag containing the piece of information I want (in the same <tr>.

I successfully fetched the HTML file using cURL but need a little help with the XML search algorithm.

Thank you in advance!