1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtNetwork module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QNETWORKDISKCACHE_P_H 41 #define QNETWORKDISKCACHE_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtNetwork/private/qtnetworkglobal_p.h> 55 #include "private/qabstractnetworkcache_p.h" 56 57 #include <qbuffer.h> 58 #include <qhash.h> 59 #include <qtemporaryfile.h> 60 61 QT_REQUIRE_CONFIG(networkdiskcache); 62 63 QT_BEGIN_NAMESPACE 64 65 class QFile; 66 67 class QCacheItem 68 { 69 public: QCacheItem()70 QCacheItem() : file(nullptr) 71 { 72 } ~QCacheItem()73 ~QCacheItem() 74 { 75 reset(); 76 } 77 78 QNetworkCacheMetaData metaData; 79 QBuffer data; 80 QTemporaryFile *file; size()81 inline qint64 size() const 82 { return file ? file->size() : data.size(); } 83 reset()84 inline void reset() { 85 metaData = QNetworkCacheMetaData(); 86 data.close(); 87 delete file; 88 file = nullptr; 89 } 90 void writeHeader(QFile *device) const; 91 void writeCompressedData(QFile *device) const; 92 bool read(QFile *device, bool readData); 93 94 bool canCompress() const; 95 }; 96 97 class QNetworkDiskCachePrivate : public QAbstractNetworkCachePrivate 98 { 99 public: QNetworkDiskCachePrivate()100 QNetworkDiskCachePrivate() 101 : QAbstractNetworkCachePrivate() 102 , maximumCacheSize(1024 * 1024 * 50) 103 , currentCacheSize(-1) 104 {} 105 106 static QString uniqueFileName(const QUrl &url); 107 QString cacheFileName(const QUrl &url) const; 108 QString tmpCacheFileName() const; 109 bool removeFile(const QString &file); 110 void storeItem(QCacheItem *item); 111 void prepareLayout(); 112 static quint32 crc32(const char *data, uint len); 113 114 mutable QCacheItem lastItem; 115 QString cacheDirectory; 116 QString dataDirectory; 117 qint64 maximumCacheSize; 118 qint64 currentCacheSize; 119 120 QHash<QIODevice*, QCacheItem*> inserting; 121 Q_DECLARE_PUBLIC(QNetworkDiskCache) 122 }; 123 124 QT_END_NAMESPACE 125 126 #endif // QNETWORKDISKCACHE_P_H 127