qnetworkdiskcache_p.h

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QNETWORKDISKCACHE_P_H

#define QNETWORKDISKCACHE_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <QtNetwork/private/qtnetworkglobal_p.h>

#include "private/qabstractnetworkcache_p.h"

#include <qbuffer.h>

#include <qhash.h>

#include <qsavefile.h>

QT_REQUIRE_CONFIG(networkdiskcache);

QT_BEGIN_NAMESPACE

class QCacheItem

public:

    QCacheItem() = default;

    ~QCacheItem()

        reset();

    QNetworkCacheMetaData metaData;

    QBuffer data;

    QSaveFile *file = nullptr;

    inline qint64 size() const

        { return file ? file->size() : data.size(); }

    inline void reset() {

        metaData = QNetworkCacheMetaData();

        data.close();

        delete file;

        file = nullptr;

    void writeHeader(QFileDevice *device) const;

    void writeCompressedData(QFileDevice *device) const;

    bool read(QFileDevice *device, bool readData);

    bool canCompress() const;

};

class QNetworkDiskCachePrivate : public QAbstractNetworkCachePrivate

public:

    QNetworkDiskCachePrivate()

        : QAbstractNetworkCachePrivate()

        , maximumCacheSize(1024 * 1024 * 50)

        , currentCacheSize(-1)

{}

    static QString uniqueFileName(const QUrl &url);

    QString cacheFileName(const QUrl &url) const;

    bool removeFile(const QString &file);

    void storeItem(QCacheItem *item);

    void prepareLayout();

    static quint32 crc32(const char *data, uint len);

    mutable QCacheItem lastItem;

    QString cacheDirectory;

    QString dataDirectory;

    qint64 maximumCacheSize;

    qint64 currentCacheSize;

    QHash<QIODevice*, QCacheItem*> inserting;

    Q_DECLARE_PUBLIC(QNetworkDiskCache)

};

QT_END_NAMESPACE

#endif // QNETWORKDISKCACHE_P_H