tcp socket error signal

ODБOï

Hi,

I'm trying to handle error(QAbstractSocket::SocketError socketError) signal

    sk = new QTcpSocket(this);

    connect(sk, QOverload<QAbstractSocket::SocketError>::of(&QAbstractSocket::error),
        [=](QAbstractSocket::SocketError err){
                qDebug()<<"SocketError";
            });

for example : In my Tcp client app if i call write() before connectToHost() QtCreator application output will say
QIODevice::write (QTcpSocket): device not open

but my lambda is neever called,; please tell me what i'm doing wrong

VRonin

You are doing nothing wrong. That's just a qWarning() debug message, not an error reported by the socket

kshegunov

Treat warnings you get from Qt as user-code errors. To that end, writing to a socket that's not opened is definitely a dubious choice. Write to the socket after it's valid, if you need, check with QTcpSocket::isValid before you commit to writing.

ODБOï

Thank you for inputs

@kshegunov said in tcp socket error signal:

To that end, writing to a socket that's not opened is definitely a dubious choice.

i try to trigger a socket error so QAbstractSocket::error signal is emitted and i can check if my handler is called.

kshegunov

@LeLev said in tcp socket error signal:

i try to trigger a socket error so QAbstractSocket::error signal is emitted and i can check if my handler is called.

This is not a socket error, @VRonin said it; it can't be as you have no socket (yet). This is a programming error deal with it accordingly. Think of it as if you were to trip an assert somewhere.