Qt Reference Documentation

# main.cpp Example File

declarative/cppextensions/networkaccessmanagerfactory/main.cpp

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     #include <QApplication>
     #include <QNetworkAccessManager>
     #include <QNetworkProxy>

     #include <QDeclarativeEngine>
     #include <QDeclarativeNetworkAccessManagerFactory>
     #include <QDeclarativeView>

     /*
        This example illustrates using a QDeclarativeNetworkAccessManagerFactory to
        create a QNetworkAccessManager with a proxy.

        Usage:
          networkaccessmanagerfactory [-host <proxy> -port <port>] [file]
     */

     static QString proxyHost;
     static int proxyPort = 0;

     class MyNetworkAccessManagerFactory : public QDeclarativeNetworkAccessManagerFactory
     {
     public:
         virtual QNetworkAccessManager *create(QObject *parent);
     };

     QNetworkAccessManager *MyNetworkAccessManagerFactory::create(QObject *parent)
     {
         QNetworkAccessManager *nam = new QNetworkAccessManager(parent);
         if (!proxyHost.isEmpty()) {
             qDebug() << "Created QNetworkAccessManager using proxy" << (proxyHost + ":" + QString::number(proxyPort));
             QNetworkProxy proxy(QNetworkProxy::HttpCachingProxy, proxyHost, proxyPort);
             nam->setProxy(proxy);
         }

         return nam;
     }

     int main(int argc, char ** argv)
     {
         QUrl source("qrc:view.qml");

         QApplication app(argc, argv);

         for (int i = 1; i < argc; ++i) {
             QString arg(argv[i]);
             if (arg == "-host" && i < argc-1) {
                 proxyHost = argv[++i];
             } else if (arg == "-port" && i < argc-1) {
                 arg = argv[++i];
                 proxyPort = arg.toInt();
             } else if (arg[0] != '-') {
                 source = QUrl::fromLocalFile(arg);
             } else {
                 qWarning() << "Usage: networkaccessmanagerfactory [-host <proxy> -port <port>] [file]";
                 exit(1);
             }
         }

         QDeclarativeView view;
         view.engine()->setNetworkAccessManagerFactory(new MyNetworkAccessManagerFactory);

         view.setSource(source);
         view.show();

         return app.exec();
     }