opml.rb

# adapted from http://dekstop.de/weblog/2006/02/recursive_ruby_opml_parser/
# Returns a map from URL => text-field

require 'rexml/Document'
def parse_opml(opml)
  if opml.is_a? String
    doc = REXML::Document.new(opml)
    opml = doc.elements['opml/body']
  end
  feeds = {}
  opml.elements.each('outline') do |el| 
    if (el.elements.size != 0)
      feeds.merge!(parse_opml(el))
    end
    if (el.attributes['xmlUrl'])
      feeds[el.attributes['xmlUrl']] = el.attributes['text']
    end
  end
  return feeds
end