QSslSocket does not work when the size of the read buffer is set

#include <QCoreApplication>
#include <QSslSocket>
#include <QTimer>
#include <QtDebug>
#include <QObject>

class Transmitter : public QObject
{
  Q_OBJECT

  public:
    Transmitter(QObject *parent=0);
    QTimer testTimer;
    QSslSocket *socket;

  public slots:
    void handleEncrypted();
    void handleData();
};


Transmitter::Transmitter(QObject *parent) : QObject(parent)
{
  connect(&testTimer, SIGNAL(timeout()),
          this, SLOT(handleData()));

  socket = new QSslSocket(this);
  socket->setReadBufferSize(1000); // limit to 1 kb/sec
  connect(socket, SIGNAL(encrypted()),
          this, SLOT(handleEncrypted()));
}

void Transmitter::handleEncrypted()
{
  qDebug() << "Connected.";
  socket->write("GET /mail/help/images/googlemail.gif HTTP/1.0\r\n\r\n");
  testTimer.start(1000);
}

void Transmitter::handleData()
{
  QByteArray data = socket->readAll();
  //socket->flush(); work with flush
  qDebug() << "BytesAvailable:" << socket->bytesAvailable()
           << "| EncryptedBytesAvailable:" << socket->encryptedBytesAvailable() << "size = " << data.size();
}


int main(int argc, char *argv[])
{

  QCoreApplication qapp(argc, argv);

  qDebug() << "Connecting...";
  Transmitter *trans = new Transmitter;
  trans->socket->connectToHostEncrypted("mail.google.com", 443);

  return qapp.exec();
}

#include "main.moc"