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();
 }
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