html_yadis_location (OpenID::Yadis)

    # File lib/openid/yadis/parsehtml.rb, line 6
        def Yadis.html_yadis_location(html)
          parser = HTMLTokenizer.new(html)

          # to keep track of whether or not we are in the head element
          in_head = false

          while el = parser.getTag('head', '/head', 'meta', 'body', '/body', 'html')

            # we are leaving head or have reached body, so we bail
            return nil if ['/head', 'body', '/body'].member?(el.tag_name)

            if el.tag_name == 'head'
              unless el.to_s[-2] == ?/ # tag ends with a /: a short tag
                in_head = true
              end
            end
            next unless in_head

            return nil if el.tag_name == 'html'

            if el.tag_name == 'meta' and (equiv = el.attr_hash['http-equiv'])
              if ['x-xrds-location','x-yadis-location'].member?(equiv.downcase)
                return CGI::unescapeHTML(el.attr_hash['content'])
              end
            end

          end
        end