i' sorry .

this is the original code :

a part of simplechatclient.cpp :
Qt Code: 
  1. void SimpleChatClient::sendMessage()
  2. {
  3. 	// "<nick> message\n"
  4. 	socket->write("<" + nick->text().toLatin1() + "> " + message->text().toLatin1() + "\n");
  5. 	message->clear();
  6. }
  7.  
  8. void SimpleChatClient::receiveMessage()
  9. {
  10. 	// missing some checks for returns values for the sake of simplicity
  11. 	qint64 bytes = buffer->write(socket->readAll());
  12. 	// go back as many bytes as we just wrote so that it can be read
  13. 	buffer->seek(buffer->pos() - bytes);
  14. 	// read only full lines, line by line
  15. 	while (buffer->canReadLine())
  16. 	{
  17. 		QString line = buffer->readLine();
  18. 		chat->append(line.simplified());
  19. 	}
  20. }
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a part of simplechatsever.cpp :

Qt Code: 
  1. void SimpleChatServer::receiveMessage()
  2. {
  3. 	QTcpSocket* socket = static_cast<QTcpSocket*>(sender());
  4. 	QBuffer* buffer = buffers.value(socket);
  5.  
  6. 	// missing some checks for returns values for the sake of simplicity
  7. 	qint64 bytes = buffer->write(socket->readAll());
  8. 	// go back as many bytes as we just wrote so that it can be read
  9. 	buffer->seek(buffer->pos() - bytes);
  10. 	// read only full lines, line by line
  11. 	while (buffer->canReadLine())
  12. 	{
  13. 		QByteArray line = buffer->readLine();
  14. 		foreach (QTcpSocket* connection, connections)
  15. 		{
  16. 			connection->write(line);
  17. 		}
  18. 	}
  19. }
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I had fix only at these methods And declare quint32 blockSize in the header file.