runtime.HandleError(fmt.Errorf("unable to upgrade: error hijacking response: %v", err))
		return nil
	}

	connWithBuf := &connWrapper{Conn: conn, bufReader: bufrw.Reader}
	spdyConn, err := NewServerConnectionWithPings(connWithBuf, newStreamHandler, u.pingPeriod)
	if err != nil {
		runtime.HandleError(fmt.Errorf("unable to upgrade: error creating SPDY server connection: %v", err))
		return nil
	}

	return spdyConn