O'Reilly logo

Game Programming using Qt 5 Beginner's Guide - Second Edition by Lorenz Haas, Witold Wysota, Pavel Strakhov

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Time for action – Parsing the server's reply

In the constructor, we have connected the manager's finished() signal to the finished() slot of the MainWindow class. It will thus be called after the request has been posted:

void MainWindow::finished(QNetworkReply *reply)
{
    if (m_reply != reply) {
        reply->deleteLater();
        return;
    }
    //...
}

First, we check whether the reply that was passed is the one that we have requested through m_network_manager. If this is not the case, we delete the reply and exit the function. This can happen if a reply was aborted by the sendRequest() slot. Since we are now sure that it is our request, we set m_reply to nullptr, because we have handled it and do not need this information any more:

m_reply = nullptr; if (reply->error() ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required