class WebSocket::Frame::Handler::Handler75

def encode_frame
  case @frame.type
  when :close then "\xff\x00"
  when :text then
    ary = ["\x00", @frame.data, "\xff"]
    ary.map { |s| s.encode('UTF-8', 'UTF-8', invalid: :replace) }
    ary.join
  else raise WebSocket::Error::Frame::UnknownFrameType
  end
end