void ServerConnectionImpl::onUrl(const char* data, size_t length) {
  if (active_request_) {
    active_request_->request_url_.append(data, length);
  }
}
void ServerConnectionImpl::onUrl(const char* data, size_t length) {
  if (active_request_) {
    active_request_->request_url_.append(data, length);
  }
}