class HTML::WhiteListSanitizer

def process_attributes_for(node, options)
  return unless node.attributes
  node.attributes.keys.each do |attr_name|
    value = node.attributes[attr_name].to_s
    if !options[:attributes].include?(attr_name) || contains_bad_protocols?(attr_name, value)
      node.attributes.delete(attr_name)
    else
      node.attributes[attr_name] = attr_name == 'style' ? sanitize_css(value) : CGI::escapeHTML(CGI::unescapeHTML(value))
    end
  end
end