Qt 4.7: main.cpp Example File (declarative/cppextensions/networkaccessmanagerfactory/main.cpp)

Qt Reference Documentation

# main.cpp Example File

declarative/cppextensions/networkaccessmanagerfactory/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
     **     the names of its contributors may be used to endorse or promote
     **     products derived from this software without specific prior written
     **     permission.
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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();
     }