class Nokogiri::HTML::Document::EncodingReader::SAXHandler

def initialize
  @encoding = nil
  super()
end

def start_element(name, attrs = [])
  return unless name == 'meta'
  attr = Hash[attrs]
  charset = attr['charset'] and
    @encoding = charset
  http_equiv = attr['http-equiv'] and
    http_equiv.match(/\AContent-Type\z/i) and
    content = attr['content'] and
    m = content.match(/;\s*charset\s*=\s*([\w-]+)/) and
    @encoding = m[1]
end