Try out this tutorial for Nokogiri.
Example for a <li>
tag:
require 'rubygems'
require 'nokogiri'
require 'open-uri'
PAGE_URL = "http://ruby.bastardsbook.com/files/hello-webpage.html"
page.css('li')[0].text
This will output YouTube from the site below:
<div id="funstuff">
<p>Here are some entertaining links:</p>
<ul>
<li><a href="http://youtube.com">YouTube</a></li>
<li><a data-category="news" href="http://reddit.com">Reddit</a></li>
<li><a href="http://kathack.com/">Kathack</a></li>
<li><a data-category="news" href="http://www.nytimes.com">New York Times</a></li>
</ul>
</div>