| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #ifndef QNETWORKDISKCACHE_P_H |
| 5 | #define QNETWORKDISKCACHE_P_H |
| 6 | |
| 7 | // |
| 8 | // W A R N I N G |
| 9 | // ------------- |
| 10 | // |
| 11 | // This file is not part of the Qt API. It exists purely as an |
| 12 | // implementation detail. This header file may change from version to |
| 13 | // version without notice, or even be removed. |
| 14 | // |
| 15 | // We mean it. |
| 16 | // |
| 17 | |
| 18 | #include <QtNetwork/private/qtnetworkglobal_p.h> |
| 19 | #include "private/qabstractnetworkcache_p.h" |
| 20 | |
| 21 | #include <qbuffer.h> |
| 22 | #include <qhash.h> |
| 23 | #include <qsavefile.h> |
| 24 | |
| 25 | QT_REQUIRE_CONFIG(networkdiskcache); |
| 26 | |
| 27 | QT_BEGIN_NAMESPACE |
| 28 | |
| 29 | class QCacheItem |
| 30 | { |
| 31 | public: |
| 32 | QCacheItem() = default; |
| 33 | ~QCacheItem() |
| 34 | { |
| 35 | reset(); |
| 36 | } |
| 37 | |
| 38 | QNetworkCacheMetaData metaData; |
| 39 | QBuffer data; |
| 40 | QSaveFile *file = nullptr; |
| 41 | inline qint64 size() const |
| 42 | { return file ? file->size() : data.size(); } |
| 43 | |
| 44 | inline void reset() { |
| 45 | metaData = QNetworkCacheMetaData(); |
| 46 | data.close(); |
| 47 | delete file; |
| 48 | file = nullptr; |
| 49 | } |
| 50 | void writeHeader(QFileDevice *device) const; |
| 51 | void writeCompressedData(QFileDevice *device) const; |
| 52 | bool read(QFileDevice *device, bool readData); |
| 53 | |
| 54 | bool canCompress() const; |
| 55 | }; |
| 56 | |
| 57 | class QNetworkDiskCachePrivate : public QAbstractNetworkCachePrivate |
| 58 | { |
| 59 | public: |
| 60 | QNetworkDiskCachePrivate() |
| 61 | : QAbstractNetworkCachePrivate() |
| 62 | , maximumCacheSize(1024 * 1024 * 50) |
| 63 | , currentCacheSize(-1) |
| 64 | {} |
| 65 | |
| 66 | static QString uniqueFileName(const QUrl &url); |
| 67 | QString cacheFileName(const QUrl &url) const; |
| 68 | bool removeFile(const QString &file); |
| 69 | void storeItem(QCacheItem *item); |
| 70 | void prepareLayout(); |
| 71 | static quint32 crc32(const char *data, uint len); |
| 72 | |
| 73 | mutable QCacheItem lastItem; |
| 74 | QString cacheDirectory; |
| 75 | QString dataDirectory; |
| 76 | qint64 maximumCacheSize; |
| 77 | qint64 currentCacheSize; |
| 78 | |
| 79 | QHash<QIODevice*, QCacheItem*> inserting; |
| 80 | Q_DECLARE_PUBLIC(QNetworkDiskCache) |
| 81 | }; |
| 82 | |
| 83 | QT_END_NAMESPACE |
| 84 | |
| 85 | #endif // QNETWORKDISKCACHE_P_H |
| 86 |