C++ QNetworkSession类代码示例

/*!
    Starts the backend.  Returns \c true if the backend is started.  Returns \c false if the backend
    could not be started due to an unopened or roaming session.  The caller should recall this
    function once the session has been opened or the roaming process has finished.
*/
bool QNetworkAccessBackend::start()
{
#ifndef QT_NO_BEARERMANAGEMENT
    // For bearer, check if session start is required
    QSharedPointer<QNetworkSession> networkSession(manager->getNetworkSession());
    if (networkSession) {
        // session required
        if (networkSession->isOpen() &&
            networkSession->state() == QNetworkSession::Connected) {
            // Session is already open and ready to use.
            // copy network session down to the backend
            setProperty("_q_networksession", QVariant::fromValue(networkSession));
        } else {
            // Session not ready, but can skip for loopback connections

            // This is not ideal.
            const QString host = reply->url.host();

            if (host == QLatin1String("localhost") ||
                QHostAddress(host).isLoopback() ||
                reply->url.isLocalFile()) {
                // Don't need an open session for localhost access.
            } else {
                // need to wait for session to be opened
                return false;
            }
        }
    }
#endif

#ifndef QT_NO_NETWORKPROXY
#ifndef QT_NO_BEARERMANAGEMENT
    // Get the proxy settings from the network session (in the case of service networks,
    // the proxy settings change depending which AP was activated)
    QNetworkSession *session = networkSession.data();
    QNetworkConfiguration config;
    if (session) {
        QNetworkConfigurationManager configManager;
        // The active configuration tells us what IAP is in use
        QVariant v = session->sessionProperty(QLatin1String("ActiveConfiguration"));
        if (v.isValid())
            config = configManager.configurationFromIdentifier(qvariant_cast<QString>(v));
        // Fallback to using the configuration if no active configuration
        if (!config.isValid())
            config = session->configuration();
        // or unspecified configuration if that is no good either
        if (!config.isValid())
            config = QNetworkConfiguration();
    }
    reply->proxyList = manager->queryProxy(QNetworkProxyQuery(config, url()));
#else // QT_NO_BEARERMANAGEMENT
    // Without bearer management, the proxy depends only on the url
    reply->proxyList = manager->queryProxy(QNetworkProxyQuery(url()));
#endif
#endif

    // now start the request
    open();
    return true;
}

void QNetworkReplyImplPrivate::_q_networkSessionConnected()
{
    Q_Q(QNetworkReplyImpl);

    if (manager.isNull())
        return;

    QNetworkSession *session = manager->d_func()->networkSession;
    if (!session)
        return;

    if (session->state() != QNetworkSession::Connected)
        return;

    switch (state) {
    case QNetworkReplyImplPrivate::Buffering:
    case QNetworkReplyImplPrivate::Working:
    case QNetworkReplyImplPrivate::Reconnecting:
        // Migrate existing downloads to new network connection.
        migrateBackend();
        break;
    case QNetworkReplyImplPrivate::WaitingForSession:
        // Start waiting requests.
        QMetaObject::invokeMethod(q, "_q_startOperation", Qt::QueuedConnection);
        break;
    default:
        ;
    }
}

void QNetworkReplyImplPrivate::_q_startOperation()
{
    // ensure this function is only being called once
    if (state == Working) {
        qDebug("QNetworkReplyImpl::_q_startOperation was called more than once");
        return;
    }
    state = Working;

    // note: if that method is called directly, it cannot happen that the backend is 0,
    // because we just checked via a qobject_cast that we got a http backend (see
    // QNetworkReplyImplPrivate::setup())
    if (!backend) {
        error(QNetworkReplyImpl::ProtocolUnknownError,
              QCoreApplication::translate("QNetworkReply", "Protocol \"%1\" is unknown").arg(url.scheme())); // not really true!;
        finished();
        return;
    }

#ifndef QT_NO_BEARERMANAGEMENT
    if (!backend->start()) {
        // backend failed to start because the session state is not Connected.
        // QNetworkAccessManager will call reply->backend->start() again for us when the session
        // state changes.
        state = WaitingForSession;

        QNetworkSession *session = manager->d_func()->networkSession;

        if (session) {
            Q_Q(QNetworkReplyImpl);

            QObject::connect(session, SIGNAL(error(QNetworkSession::SessionError)),
                             q, SLOT(_q_networkSessionFailed()));

            if (!session->isOpen())
                session->open();
        } else {
            qWarning("Backend is waiting for QNetworkSession to connect, but there is none!");
        }

        return;
    }
#endif

    if (state != Finished) {
        if (operation == QNetworkAccessManager::GetOperation)
            pendingNotifications.append(NotifyDownstreamReadyWrite);

        handleNotifications();
    }
}

static PyObject *meth_QNetworkSession_isOpen(PyObject *sipSelf, PyObject *sipArgs)
{
    PyObject *sipParseErr = NULL;

    {
        QNetworkSession *sipCpp;

        if (sipParseArgs(&sipParseErr, sipArgs, "B", &sipSelf, sipType_QNetworkSession, &sipCpp))
        {
            bool sipRes;

            Py_BEGIN_ALLOW_THREADS
            sipRes = sipCpp->isOpen();
            Py_END_ALLOW_THREADS

            return PyBool_FromLong(sipRes);
        }
    }

 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("Trolltech"));
         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("Trolltech"));
             settings.beginGroup(QLatin1String("QtNetwork"));
             settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
             settings.endGroup();
         }
     }

     //ChatDialog dialog;
     InitialWindow window;

 #ifdef Q_OS_SYMBIAN
     // Make application better looking and more usable on small screen
    // dialog.showMaximized();
 #else
  //   dialog.show();
     window.show();
 #endif
     return app.exec();
 }

int main(int argc, char *argv[])
{
    QApplication a(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, &a);
            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();
            }
        }





    interface w;
    w.show();

    return a.exec();
}

int main(int argc, char**argv)
{
    QCoreApplication app(argc, argv);

#ifdef Q_OS_SYMBIAN
    QNetworkConfigurationManager configurationManager;
    QNetworkConfiguration configuration = configurationManager.defaultConfiguration();
    if (!configuration.isValid()) {
        qDebug() << "Got an invalid session configuration";
        exit(1);
    }

    qDebug() << "Opening session...";
    QNetworkSession *session = new QNetworkSession(configuration);

    // Does not work:
//    session->open();
//    session->waitForOpened();

    // works:
    QEventLoop loop;
    QObject::connect(session, SIGNAL(opened()), &loop, SLOT(quit()), Qt::QueuedConnection);
    QMetaObject::invokeMethod(session, "open", Qt::QueuedConnection);
    loop.exec();


    if (session->isOpen()) {
        qDebug() << "session opened";
    } else {
        qDebug() << "session could not be opened -" << session->errorString();
        exit(1);
    }
#endif

    // create it
    QAbstractSocketEngine *socketEngine =
            QAbstractSocketEngine::createSocketEngine(QAbstractSocket::TcpSocket, QNetworkProxy(QNetworkProxy::NoProxy), 0);
    if (!socketEngine) {
        qDebug() << "could not create engine";
        exit(1);
    }

    // initialize it
    bool initialized = socketEngine->initialize(QAbstractSocket::TcpSocket, QAbstractSocket::IPv4Protocol);
    if (!initialized) {
        qDebug() << "not able to initialize engine";
        exit(1);
    }

    // wait for connected
    int r = socketEngine->connectToHost(QHostAddress("74.125.77.99"), 80); // google
    bool readyToRead = false;
    bool readyToWrite = false;
    socketEngine->waitForReadOrWrite(&readyToRead, &readyToWrite, true, true, 10*1000);
    if (r <= 0) //timeout or error
        exit(1);
    if (readyToWrite) {
        // write the request
        QByteArray request("GET /robots.txt HTTP/1.0\r\n\r\n");
        int ret = socketEngine->write(request.constData(), request.length());
        if (ret == request.length()) {
            // read the response in a loop
            do {
                bool waitReadResult = socketEngine->waitForRead(10*1000);
                int available = socketEngine->bytesAvailable();
                if (waitReadResult == true && available == 0) {
                    // disconnected
                    exit(0);
                }
                bzero(buf, bufsize);
                ret = socketEngine->read(buf, available);
                if (ret > 0) {
#ifdef Q_OS_SYMBIAN
                    qDebug() << buf; //printf goes only to screen, this goes to remote debug channel
#else
                    printf("%s", buf);
#endif
                } else {
                    // some failure when reading
                    exit(1);
                }
            } while (1);
        } else {
            qDebug() << "failed writing";
        }
    } else {
        qDebug() << "failed connecting";
    }
    delete socketEngine;
}

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QNetworkConfigurationManager manager;
    if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
        // Get saved network configuration
        QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
        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, &a);
        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("Trolltech"));
            settings.beginGroup(QLatin1String("QtNetwork"));
            settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
            settings.endGroup();
        }
    }


    RedDeerNote w;



    QSplashScreen *splash=new QSplashScreen;
    splash->setPixmap(QPixmap(":/icons/logord2.png"));
    splash->show();
    splash->showMessage( "Initializing..." );
    SleeperThread::msleep(300);
    splash->showMessage( "Load GUI..." );
    SleeperThread::msleep(300);
    splash->showMessage( "Load Library..." );
    SleeperThread::msleep(300);
    splash->showMessage( "Starting..." );
    SleeperThread::msleep(300);


    w.show();
    splash->finish(&w);
    delete splash;
    return a.exec();
}