1 /****************************************************************************
3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: http://www.qt-project.org/
6 ** This file is part of the QtNetwork module of the Qt Toolkit.
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** GNU Lesser General Public License Usage
10 ** This file may be used under the terms of the GNU Lesser General Public
11 ** License version 2.1 as published by the Free Software Foundation and
12 ** appearing in the file LICENSE.LGPL included in the packaging of this
13 ** file. Please review the following information to ensure the GNU Lesser
14 ** General Public License version 2.1 requirements will be met:
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17 ** In addition, as a special exception, Nokia gives you certain additional
18 ** rights. These rights are described in the Nokia Qt LGPL Exception
19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
21 ** GNU General Public License Usage
22 ** Alternatively, this file may be used under the terms of the GNU General
23 ** Public License version 3.0 as published by the Free Software Foundation
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25 ** file. Please review the following information to ensure the GNU General
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40 ****************************************************************************/
42 #ifndef QNETWORKACCESSCACHE_P_H
43 #define QNETWORKACCESSCACHE_P_H
49 // This file is not part of the Qt API. It exists for the convenience
50 // of the Network Access API. This header file may change from
51 // version to version without notice, or even be removed.
56 #include "QtCore/qobject.h"
57 #include "QtCore/qbasictimer.h"
58 #include "QtCore/qbytearray.h"
59 #include "QtCore/qhash.h"
60 #include "QtCore/qmetatype.h"
64 class QNetworkRequest;
67 // this class is not about caching files but about
68 // caching objects used by QNetworkAccessManager, e.g. existing TCP connections
70 class QNetworkAccessCache: public QObject
75 typedef QHash<QByteArray, Node> NodeHash;
79 friend class QNetworkAccessCache;
85 virtual ~CacheableObject();
86 virtual void dispose() = 0;
87 inline QByteArray cacheKey() const { return key; }
90 void setExpires(bool enable);
91 void setShareable(bool enable);
94 QNetworkAccessCache();
95 ~QNetworkAccessCache();
99 void addEntry(const QByteArray &key, CacheableObject *entry);
100 bool hasEntry(const QByteArray &key) const;
101 bool requestEntry(const QByteArray &key, QObject *target, const char *member);
102 CacheableObject *requestEntryNow(const QByteArray &key);
103 void releaseEntry(const QByteArray &key);
104 void removeEntry(const QByteArray &key);
107 void entryReady(QNetworkAccessCache::CacheableObject *);
110 void timerEvent(QTimerEvent *);
113 // idea copied from qcache.h
120 void linkEntry(const QByteArray &key);
121 bool unlinkEntry(const QByteArray &key);
123 bool emitEntryReady(Node *node, QObject *target, const char *member);
128 Q_DECLARE_METATYPE(QNetworkAccessCache::CacheableObject*)