void HttpServlet::DoTrace(HttpServletRequest& request, HttpServletResponse& response)
{
  std::string CRLF = "\r\n";
  std::string responseString = "TRACE " + request.GetRequestUri() +
                               " " + request.GetProtocol();

  std::vector<std::string> reqHeaders = request.GetHeaderNames();

  for (std::size_t i = 0; i < reqHeaders.size(); ++i)
  {
    responseString += CRLF + reqHeaders[i] + ": " +
                      request.GetHeader(reqHeaders[i]);
  }

  responseString += CRLF;

  response.SetContentType("message/http");
  response.SetContentLength(responseString.size());
  response.GetOutputStream() << responseString << std::flush;
  return;
}