readLine problem

[wysota]

Thanks for your reply!

I have tested that the data is available with the telnet command. The data comes with both LF and CR so canReadline /readLine should work. Output to terminal looks like this (changed all of the couts to english now)

Does the output come to the terminal within a 1ns after establishing the connection? I doubt that... The data arrives, but it arrives later - you can't connect and expect the data to be already there.

[gQt]

I'm doing an if (waitForConnected(-1)) after the connectToHost if that wat you mean?

Should I add anything else here?
(I'm new to Qt and Socket-programming)

From the read_data() function:

tcpSocket->abort();
        tcpSocket->connectToHost(hostLineEdit->text(),
                                 portLineEdit->text().toInt());
 
        cout << ("after connectToHost\n");
 
        if(tcpSocket->waitForConnected(-1))
        {
                cout <<"wait for connected loop\n";
                if(tcpSocket->canReadLine())
                {
                        mystring=tcpSocket->readLine();
                        qDebug() << "READ" << mystring;
                        cout <<"canReadLine loop after readLine\n";
                }
                statusLabel->setText(mystring);
                getFortuneButton->setEnabled(false);
        }

tcpSocket->abort();
        tcpSocket->connectToHost(hostLineEdit->text(),
                                 portLineEdit->text().toInt());

        cout << ("after connectToHost\n");

        if(tcpSocket->waitForConnected(-1))
        {
                cout <<"wait for connected loop\n";
                if(tcpSocket->canReadLine())
                {
                        mystring=tcpSocket->readLine();
                        qDebug() << "READ" << mystring;
                        cout <<"canReadLine loop after readLine\n";
                }
                statusLabel->setText(mystring);
                getFortuneButton->setEnabled(false);
        }

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[wysota]

I'm doing an if (waitForConnected(-1)) after the connectToHost if that wat you mean?

No, this waits for the connection to be established, not for the data to be ready.

Should I add anything else here?

QAbstractSocket::waitForReadyRead

(I'm new to Qt and Socket-programming)

That should motivate you to do some more reading.

[gQt]

Thanks a mill wysota !
I hadn't thought about the waitForReadyRead- that I had to wait for the data to be ready to read also.

[wysota]

Be aware that the fact that waitForReadyRead returns means there is something to read, not that everything is ready to be read.