copy the POST request body

        request->unparsedMethod(),

        request->unparsedUri());

    xzero::Buffer body_buf;

    request->input()->read(&body_buf);

    if (!body_buf.empty()) {

      req->addBody(body_buf.str());

    }

    for (const auto& handler : *handlers_) {

      if (handler->handleHTTPRequest(req, res)) {

        break;