gistfile1.rb

# Use Hpricot to add rel="nofollow" to anchor links before output

require 'hpricot'

def add_nofollow(body)
  body = Hpricot(body)
  a_elements = body.search('a')

  unless a_elements.blank?
    a_elements.each do |a|
      a.attributes['rel'] = 'nofollow'
    end
  end

  body.to_html
end