simple socket client example

[Tomasz]

Hello!

I've wrote server and client using sockets.h in C. Now I'm trying to write client in QT4. I can't find any working example. My server program sends always 20 bytes if we first send him one byte which is 'o', and I just want to read It. Anyone can help? Maybe some sample code?

thanks in advance
best regards
Tomasz

[aamer4yu]

Did you go through the Qt demos ? You can find examples for Networking there.

[Tomasz]

Yes. I've found some examples at http://doc.qt.nokia.com/4.0/qt4-network.html#tcp-client. But It isn't what I'm looking for so I've read QTcpSocket class reference and tried to write something on my own:

char bufor[20];
    tcpSocket = new QTcpSocket(this);
 
    tcpSocket->abort();
    tcpSocket->connectToHost("localhost",57717);
 
    bufor[0] = 'o';
    tcpSocket->write(bufor,1);
    tcpSocket->read(bufor,19);

char bufor[20];
    tcpSocket = new QTcpSocket(this);

    tcpSocket->abort();
    tcpSocket->connectToHost("localhost",57717);

    bufor[0] = 'o';
    tcpSocket->write(bufor,1);
    tcpSocket->read(bufor,19);

To copy to clipboard, switch view to plain text mode 

but when I read I've got what I've just wrote ('o'). Tutorial in link above isn't clear for me. Can someone tell me what should I change in my code to make it work?

thanks in advance
best regards
Tomasz

[squidge]

Ok: Use signals and slots. Wait until the connection is established before writing. Wait until there is something to read before reading.

[aamer4yu]

or may be use QAbstractSocket::waitForReadyRead