absolut.rb

require 'rubygems'
require 'hpricot'


class String
  def to_absolut
    doc = Hpricot(self)
    (doc/"a").each do |link|
      link["href"] = "http://hi.com/" + link["href"]
    end
    (doc/"img").each do |link|
      link["src"] = "http://hi.com/" + link["src"]
    end
    doc.to_s
  end
end


html = "<p><a href='bar.html'></a><img src='../foo.jpg' /></p>"
puts html.to_absolut