main.cpp Example File

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  #include <QApplication>

  #include "chatdialog.h"

  #include <QtCore/QSettings>
  #include <QtNetwork/QNetworkConfigurationManager>
  #include <QtNetwork/QNetworkSession>

  int main(int argc, char *argv[])
  {
      QApplication app(argc, argv);

      QNetworkConfigurationManager manager;
      if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
          // Get saved network configuration
          QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
          settings.beginGroup(QLatin1String("QtNetwork"));
          const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
          settings.endGroup();

          // If the saved network configuration is not currently discovered use the system default
          QNetworkConfiguration config = manager.configurationFromIdentifier(id);
          if ((config.state() & QNetworkConfiguration::Discovered) !=
              QNetworkConfiguration::Discovered) {
              config = manager.defaultConfiguration();
          }

          QNetworkSession *networkSession = new QNetworkSession(config, &app);
          networkSession->open();
          networkSession->waitForOpened();

          if (networkSession->isOpen()) {
              // Save the used configuration
              QNetworkConfiguration config = networkSession->configuration();
              QString id;
              if (config.type() == QNetworkConfiguration::UserChoice) {
                  id = networkSession->sessionProperty(
                          QLatin1String("UserChoiceConfiguration")).toString();
              } else {
                  id = config.identifier();
              }

              QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
              settings.beginGroup(QLatin1String("QtNetwork"));
              settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
              settings.endGroup();
          }
      }

      ChatDialog dialog;
      dialog.show();
      return app.exec();
  }