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diff --git a/src/network/access/qnetworkreplyimpl_p.h b/src/network/access/qnetworkreplyimpl_p.h
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+/****************************************************************************
+**
+** 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 QtNetwork module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QNETWORKREPLYIMPL_P_H
+#define QNETWORKREPLYIMPL_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the Network Access API.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qnetworkreply.h"
+#include "qnetworkreply_p.h"
+#include "qnetworkaccessmanager.h"
+#include "qnetworkproxy.h"
+#include "QtCore/qmap.h"
+#include "QtCore/qqueue.h"
+#include "QtCore/qbuffer.h"
+#include "private/qringbuffer_p.h"
+#include "private/qbytedata_p.h"
+#include <QSharedPointer>
+
+QT_BEGIN_NAMESPACE
+
+class QAbstractNetworkCache;
+class QNetworkAccessBackend;
+
+class QNetworkReplyImplPrivate;
+class QNetworkReplyImpl: public QNetworkReply
+{
+    Q_OBJECT
+public:
+    QNetworkReplyImpl(QObject *parent = 0);
+    ~QNetworkReplyImpl();
+    virtual void abort();
+
+    // reimplemented from QNetworkReply / QIODevice
+    virtual void close();
+    virtual qint64 bytesAvailable() const;
+    virtual void setReadBufferSize(qint64 size);
+    virtual bool canReadLine () const;
+
+    virtual qint64 readData(char *data, qint64 maxlen);
+    virtual bool event(QEvent *);
+
+#ifndef QT_NO_OPENSSL
+    Q_INVOKABLE QSslConfiguration sslConfigurationImplementation() const;
+    Q_INVOKABLE void setSslConfigurationImplementation(const QSslConfiguration &configuration);
+    virtual void ignoreSslErrors();
+    Q_INVOKABLE virtual void ignoreSslErrorsImplementation(const QList<QSslError> &errors);
+#endif
+
+    Q_DECLARE_PRIVATE(QNetworkReplyImpl)
+    Q_PRIVATE_SLOT(d_func(), void _q_startOperation())
+    Q_PRIVATE_SLOT(d_func(), void _q_copyReadyRead())
+    Q_PRIVATE_SLOT(d_func(), void _q_copyReadChannelFinished())
+    Q_PRIVATE_SLOT(d_func(), void _q_bufferOutgoingData())
+    Q_PRIVATE_SLOT(d_func(), void _q_bufferOutgoingDataFinished())
+#ifndef QT_NO_BEARERMANAGEMENT
+    Q_PRIVATE_SLOT(d_func(), void _q_networkSessionConnected())
+    Q_PRIVATE_SLOT(d_func(), void _q_networkSessionFailed())
+#endif
+};
+
+class QNetworkReplyImplPrivate: public QNetworkReplyPrivate
+{
+public:
+    enum InternalNotifications {
+        NotifyDownstreamReadyWrite,
+        NotifyCloseDownstreamChannel,
+        NotifyCopyFinished
+    };
+
+    enum State {
+        Idle,               // The reply is idle.
+        Buffering,          // The reply is buffering outgoing data.
+        Working,            // The reply is uploading/downloading data.
+        Finished,           // The reply has finished.
+        Aborted,            // The reply has been aborted.
+        WaitingForSession,  // The reply is waiting for the session to open before connecting.
+        Reconnecting        // The reply will reconnect to once roaming has completed.
+    };
+
+    typedef QQueue<InternalNotifications> NotificationQueue;
+
+    QNetworkReplyImplPrivate();
+
+    void _q_startOperation();
+    void _q_sourceReadyRead();
+    void _q_sourceReadChannelFinished();
+    void _q_copyReadyRead();
+    void _q_copyReadChannelFinished();
+    void _q_bufferOutgoingData();
+    void _q_bufferOutgoingDataFinished();
+#ifndef QT_NO_BEARERMANAGEMENT
+    void _q_networkSessionConnected();
+    void _q_networkSessionFailed();
+#endif
+
+    void setup(QNetworkAccessManager::Operation op, const QNetworkRequest &request,
+               QIODevice *outgoingData);
+
+    void pauseNotificationHandling();
+    void resumeNotificationHandling();
+    void backendNotify(InternalNotifications notification);
+    void handleNotifications();
+    void createCache();
+    void completeCacheSave();
+
+    // callbacks from the backend (through the manager):
+    void setCachingEnabled(bool enable);
+    bool isCachingEnabled() const;
+    void consume(qint64 count);
+    void emitUploadProgress(qint64 bytesSent, qint64 bytesTotal);
+    qint64 nextDownstreamBlockSize() const;
+
+    void initCacheSaveDevice();
+    void appendDownstreamDataSignalEmissions();
+    void appendDownstreamData(QByteDataBuffer &data);
+    void appendDownstreamData(QIODevice *data);
+    void appendDownstreamData(const QByteArray &data);
+
+    void setDownloadBuffer(QSharedPointer<char> sp, qint64 size);
+    char* getDownloadBuffer(qint64 size);
+    void appendDownstreamDataDownloadBuffer(qint64, qint64);
+
+    void finished();
+    void error(QNetworkReply::NetworkError code, const QString &errorString);
+    void metaDataChanged();
+    void redirectionRequested(const QUrl &target);
+    void sslErrors(const QList<QSslError> &errors);
+
+    QNetworkAccessBackend *backend;
+    QIODevice *outgoingData;
+    QSharedPointer<QRingBuffer> outgoingDataBuffer;
+    QIODevice *copyDevice;
+    QAbstractNetworkCache *networkCache() const;
+
+    bool migrateBackend();
+
+    bool cacheEnabled;
+    QIODevice *cacheSaveDevice;
+
+    NotificationQueue pendingNotifications;
+    bool notificationHandlingPaused;
+
+    QUrl urlForLastAuthentication;
+#ifndef QT_NO_NETWORKPROXY
+    QNetworkProxy lastProxyAuthentication;
+    QList<QNetworkProxy> proxyList;
+#endif
+
+    // Used for normal downloading. For "zero copy" the downloadBuffer is used
+    QByteDataBuffer readBuffer;
+    qint64 bytesDownloaded;
+    qint64 lastBytesDownloaded;
+    qint64 bytesUploaded;
+    qint64 preMigrationDownloaded;
+
+    QString httpReasonPhrase;
+    int httpStatusCode;
+
+    State state;
+
+    // only used when the "zero copy" style is used. Else readBuffer is used.
+    // Please note that the whole "zero copy" download buffer API is private right now. Do not use it.
+    qint64 downloadBufferReadPosition;
+    qint64 downloadBufferCurrentSize;
+    qint64 downloadBufferMaximumSize;
+    QSharedPointer<char> downloadBufferPointer;
+    char* downloadBuffer;
+
+    Q_DECLARE_PUBLIC(QNetworkReplyImpl)
+};
+
+#ifndef QT_NO_BEARERMANAGEMENT
+class QDisabledNetworkReply : public QNetworkReply
+{
+    Q_OBJECT
+
+public:
+    QDisabledNetworkReply(QObject *parent, const QNetworkRequest &req,
+                          QNetworkAccessManager::Operation op);
+    ~QDisabledNetworkReply();
+
+    void abort() { }
+protected:
+    qint64 readData(char *, qint64) { return -1; }
+};
+#endif
+
+QT_END_NAMESPACE
+
+#endif