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diff --git a/src/libs/kdtools/filedownloader.h b/src/libs/kdtools/filedownloader.h
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+++ b/src/libs/kdtools/filedownloader.h
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+/****************************************************************************
+**
+** Copyright (C) 2013 Klaralvdalens Datakonsult AB (KDAB)
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Installer Framework.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef FILEDOWNLOADER_H
+#define FILEDOWNLOADER_H
+
+#include "kdtoolsglobal.h"
+
+#include <QtCore/QObject>
+#include <QtCore/QUrl>
+
+#include <QtNetwork/QAuthenticator>
+
+namespace KDUpdater {
+
+class FileDownloaderProxyFactory;
+
+class KDTOOLS_EXPORT FileDownloader : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(bool autoRemoveDownloadedFile READ isAutoRemoveDownloadedFile WRITE setAutoRemoveDownloadedFile)
+    Q_PROPERTY(QUrl url READ url WRITE setUrl)
+    Q_PROPERTY(QString scheme READ scheme WRITE setScheme)
+
+public:
+    explicit FileDownloader(const QString &scheme, QObject *parent = 0);
+    ~FileDownloader();
+
+    QUrl url() const;
+    void setUrl(const QUrl &url);
+
+    QByteArray sha1Sum() const;
+
+    QByteArray assumedSha1Sum() const;
+    void setAssumedSha1Sum(const QByteArray &sha1);
+
+    QString scheme() const;
+    void setScheme(const QString &scheme);
+
+    QString errorString() const;
+
+    virtual bool canDownload() const = 0;
+    virtual bool isDownloaded() const = 0;
+    virtual QString downloadedFileName() const = 0;
+    virtual void setDownloadedFileName(const QString &name) = 0;
+    virtual FileDownloader *clone(QObject *parent=0) const = 0;
+
+    void download();
+
+    void setAutoRemoveDownloadedFile(bool val);
+    bool isAutoRemoveDownloadedFile() const;
+
+    void setFollowRedirects(bool val);
+    bool followRedirects() const;
+
+    FileDownloaderProxyFactory *proxyFactory() const;
+    void setProxyFactory(FileDownloaderProxyFactory *factory);
+
+    QAuthenticator authenticator() const;
+    void setAuthenticator(const QAuthenticator &authenticator);
+
+    bool ignoreSslErrors();
+    void setIgnoreSslErrors(bool ignore);
+
+public Q_SLOTS:
+    virtual void cancelDownload();
+
+protected:
+    virtual void onError() = 0;
+    virtual void onSuccess() = 0;
+
+Q_SIGNALS:
+    void downloadStarted();
+    void downloadCanceled();
+
+    void downloadProgress(double progress);
+    void estimatedDownloadTime(int seconds);
+    void downloadSpeed(qint64 bytesPerSecond);
+    void downloadStatus(const QString &status);
+    void downloadProgress(qint64 bytesReceived, qint64 bytesToReceive);
+    void authenticatorChanged(const QAuthenticator &authenticator);
+    void downloadCompleted();
+    void downloadAborted(const QString &errorMessage);
+
+protected:
+    void setDownloadCanceled();
+    void setDownloadCompleted();
+    void setDownloadAborted(const QString &error);
+
+    void runDownloadSpeedTimer();
+    void stopDownloadSpeedTimer();
+
+    void addSample(qint64 sample);
+    int downloadSpeedTimerId() const;
+    void setProgress(qint64 bytesReceived, qint64 bytesToReceive);
+
+    void emitDownloadSpeed();
+    void emitDownloadStatus();
+    void emitDownloadProgress();
+    void emitEstimatedDownloadTime();
+
+    void addCheckSumData(const QByteArray &data);
+    void addCheckSumData(const char *data, int length);
+    void resetCheckSumData();
+
+private Q_SLOTS:
+    virtual void doDownload() = 0;
+
+private:
+    struct Private;
+    Private *d;
+};
+
+} // namespace KDUpdater
+
+#endif // FILEDOWNLOADER_H