class WEBrick::HTTPResponse

def make_body_tempfile # :nodoc:
  return if @bodytempfile
  bodytempfile = Tempfile.create("webrick")
  if @body.nil?
    # nothing
  elsif @body.respond_to? :readpartial
    IO.copy_stream(@body, bodytempfile)
    @body.close
  elsif @body.respond_to? :call
    @body.call(bodytempfile)
  else
    bodytempfile.write @body
  end
  bodytempfile.rewind
  @body = @bodytempfile = bodytempfile
  @header['content-length'] = bodytempfile.stat.size.to_s
end