QNetworkAccessManager returning empty results

Question

I am struggling with qnetworkaccessmanager for quite sometime. I googled a lot, but I donot find a solution for this.

I am creating a client using qaccessmanager to talk with a rest server. QNetworkReply is not returning any results. The server is working properly but the client is not returning results. On top of that the server gets called 3 times and sometimes the server is crashing. Hope some one can figure out what is going wrong. I am attaching the client code.

I tried different approches like connecting finished signal of networkaccessmanager, qnetworkreply e.t.c. But all of them ends up in giving the same error "Connection Closed" or the readAll bytearray being empty.

void RestClientCore::ConnectToServer()
{
   m_NetworkManager  = new QNetworkAccessManager(this);

    QUrl url("http://localhost");
    url.setPort(5432);
    QByteArray postData;
     postData.append("/?userid=user");
     postData.append("&site=site");
    QNetworkReply *reply = m_NetworkManager->post(request,postData);
    connect(reply, SIGNAL(readyRead()),this, SLOT(slotReadyRead()));
    connect(reply, SIGNAL(finished()), this, SLOT(onRequestCompleted()));
}

void RestClientCore::onRequestCompleted() {

  QNetworkReply *reply = qobject_cast<QNetworkReply *>(sender());
    if(reply->error())
    {
      qDebug() <<reply->bytesAvailable() << reply->errorString();
    }
    else
    {
      qDebug() << reply->readAll();
    }
    reply->deleteLater();
}

void RestClientCore::slotReadyRead()
{
   QNetworkReply *reply = qobject_cast<QNetworkReply *>(sender());
   qDebug() << reply->readAll();
}

Thanks in advance Regards Rejo