class Addressable::URI

def to_s
  if self.scheme == nil && self.path != nil && !self.path.empty? &&
      self.path =~ NORMPATH
    raise InvalidURIError,
      "Cannot assemble URI string with ambiguous path: '#{self.path}'"
  end
  @uri_string ||= begin
    uri_string = String.new
    uri_string << "#{self.scheme}:" if self.scheme != nil
    uri_string << "//#{self.authority}" if self.authority != nil
    uri_string << self.path.to_s
    uri_string << "?#{self.query}" if self.query != nil
    uri_string << "##{self.fragment}" if self.fragment != nil
    uri_string.force_encoding(Encoding::UTF_8)
    uri_string
  end
end