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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 QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 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 "private/qabstractnetworkcache_p.h"
#include <qbuffer.h>
#include <qhash.h>
#include <qtemporaryfile.h>
#ifndef QT_NO_NETWORKDISKCACHE
QT_BEGIN_NAMESPACE
class QFile;
class QCacheItem
{
public:
QCacheItem() : file(0)
{
}
~QCacheItem()
{
reset();
}
QNetworkCacheMetaData metaData;
QBuffer data;
QTemporaryFile *file;
inline qint64 size() const
{ return file ? file->size() : data.size(); }
inline void reset() {
metaData = QNetworkCacheMetaData();
data.close();
delete file;
file = 0;
}
void writeHeader(QFile *device) const;
void writeCompressedData(QFile *device) const;
bool read(QFile *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;
QString tmpCacheFileName() 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 // QT_NO_NETWORKDISKCACHE
#endif // QNETWORKDISKCACHE_P_H
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