Using QDataStream / QTcpSocket - ReadPastEnd failure

[oheuser]

Hi,

supposably I'm facing a minor problem by reading from an underlying socket via QDataStream.
Writing through the data stream runs quite well, like seen here:

QByteArray block;
  QDataStream out( &block, QIODevice::WriteOnly );
  out.setDevice( m_TcpSocket );
  out.setVersion( QDataStream::Qt_5_0 );
  out << "HELLO CLIENT!\x0d\x0a";

QByteArray block;
  QDataStream out( &block, QIODevice::WriteOnly );
  out.setDevice( m_TcpSocket );
  out.setVersion( QDataStream::Qt_5_0 );
  out << "HELLO CLIENT!\x0d\x0a";

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But reading fails in getting a ReadPastEnd - status, when reading takes effect by using QDataStream.

QByteArray block;
  QDataStream in( m_TcpSocket );
  in.setVersion( QDataStream::Qt_5_0 );
  in >> block;

QByteArray block;
  QDataStream in( m_TcpSocket );
  in.setVersion( QDataStream::Qt_5_0 );
  in >> block;

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Other way round, using only

QByteArray data = m_TcpSocket->readAll();

QByteArray data = m_TcpSocket->readAll();

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reads everything needed.

I was also working through the Fortune example. But here the server/client will always close the connection, which in my case is not reasonable.
Any guesses? Many thanks in advance.

Br,
Oliver