1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QNETWORKACCESSCACHE_P_H
#define QNETWORKACCESSCACHE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of the Network Access API. This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//
#include "QtCore/qobject.h"
#include "QtCore/qbasictimer.h"
#include "QtCore/qbytearray.h"
#include "QtCore/qhash.h"
#include "QtCore/qmetatype.h"
QT_BEGIN_NAMESPACE
class QNetworkRequest;
class QUrl;
// this class is not about caching files but about
// caching objects used by QNetworkAccessManager, e.g. existing TCP connections
// or credentials.
class QNetworkAccessCache: public QObject
{
Q_OBJECT
public:
struct Node;
typedef QHash<QByteArray, Node> NodeHash;
class CacheableObject
{
friend class QNetworkAccessCache;
QByteArray key;
bool expires;
bool shareable;
public:
CacheableObject();
virtual ~CacheableObject();
virtual void dispose() = 0;
inline QByteArray cacheKey() const { return key; }
protected:
void setExpires(bool enable);
void setShareable(bool enable);
};
QNetworkAccessCache();
~QNetworkAccessCache();
void clear();
void addEntry(const QByteArray &key, CacheableObject *entry);
bool hasEntry(const QByteArray &key) const;
bool requestEntry(const QByteArray &key, QObject *target, const char *member);
CacheableObject *requestEntryNow(const QByteArray &key);
void releaseEntry(const QByteArray &key);
void removeEntry(const QByteArray &key);
signals:
void entryReady(QNetworkAccessCache::CacheableObject *);
protected:
void timerEvent(QTimerEvent *);
private:
// idea copied from qcache.h
NodeHash hash;
Node *oldest;
Node *newest;
QBasicTimer timer;
void linkEntry(const QByteArray &key);
bool unlinkEntry(const QByteArray &key);
void updateTimer();
bool emitEntryReady(Node *node, QObject *target, const char *member);
};
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QNetworkAccessCache::CacheableObject*)
#endif
|
