Harvester is a LUA library that makes it easy to scrape web pages, i.e. to extract data from a page.

You do this by defining a "pattern" which describes what the page looks like. Harvester then automatically extracts the data you're interested in. Here is what a sample pattern mightlook like:

<div class="content">

      <table id="videos">

         {repeat video}

            <a href='{value url}'>{value title}</a>

         {/repeat}

      </table>

For a complete description and an updated reference manual, see
http://software.artiztix.com/harvester/