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/**************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Installer Framework.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
**************************************************************************/

#ifndef DOWNLOADFILETASK_P_H
#define DOWNLOADFILETASK_P_H

#include "downloadfiletask.h"

#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>

QT_BEGIN_NAMESPACE
class QFile;
class QSslError;
QT_END_NAMESPACE

namespace QInstaller {

class FileTaskObserver;

struct Data
{
    Data()
        : file(0), observer(0) {}
    Data(QFile *f, FileTaskObserver *o, const FileTaskItem &fti)
        : file(f), observer(o), taskItem(fti)
    {}
    QFile *file;
    FileTaskObserver *observer;
    FileTaskItem taskItem;
};

class Downloader : public QObject
{
    Q_OBJECT
    Q_DISABLE_COPY(Downloader)

public:
    Downloader();
    ~Downloader();

    void download(QFutureInterface<FileTaskResult> &fi, const QList<FileTaskItem> &items,
        QNetworkProxyFactory *networkProxyFactory);

signals:
    void finished();

private slots:
    void doDownload();
    void onReadyRead();
    void onFinished(QNetworkReply *reply);
    void onError(QNetworkReply::NetworkError error);
    void onSslErrors(const QList<QSslError> &sslErrors);
    void onDownloadProgress(qint64 bytesReceived, qint64 bytesTotal);
    void onAuthenticationRequired(QNetworkReply *reply, QAuthenticator *authenticator);


private:
    bool testCanceled();
    QNetworkReply *startDownload(const FileTaskItem &item);

private:
    QFutureInterface<FileTaskResult> *m_futureInterface;

    int m_finished;
    QNetworkAccessManager m_nam;
    QList<FileTaskItem> m_items;
    QHash<QNetworkReply*, Data> m_downloads;
    QMultiHash<QNetworkReply*, QUrl> m_redirects;
};

}   // namespace QInstaller

#endif // DOWNLOADFILETASK_P_H