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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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 <QtNetwork/private/qtnetworkglobal_p.h>
#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;
qint64 expiryTimeoutSeconds;
public:
CacheableObject();
virtual ~CacheableObject();
virtual void dispose() = 0;
inline QByteArray cacheKey() const { return key; }
protected:
void setExpires(bool enable);
void setShareable(bool enable);
};
~QNetworkAccessCache();
void clear();
void addEntry(const QByteArray &key, CacheableObject *entry, qint64 connectionCacheExpiryTimeoutSeconds = -1);
bool hasEntry(const QByteArray &key) const;
CacheableObject *requestEntryNow(const QByteArray &key);
void releaseEntry(const QByteArray &key);
void removeEntry(const QByteArray &key);
signals:
void entryReady(QNetworkAccessCache::CacheableObject *);
protected:
void timerEvent(QTimerEvent *) override;
private:
// idea copied from qcache.h
NodeHash hash;
Node *firstExpiringNode = nullptr;
Node *lastExpiringNode = nullptr;
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
#endif
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