class HTTP::Request::Writer

def send_request_body
  if @body.is_a?(String)
    write(@body)
  elsif @body.is_a?(Enumerable)
    @body.each do |chunk|
      write(chunk.bytesize.to_s(16) << CRLF)
      write(chunk << CRLF)
    end
    write(CHUNKED_END)
  end
end