The QAbstractNetworkCache class provides the interface for cache implementations. More...

#include <qabstractnetworkcache.h>

Inheritance diagram for QAbstractNetworkCache:

Collaboration diagram for QAbstractNetworkCache:

Public Slots
virtual void	clear ()=0

Public Slots inherited from QObject
void	deleteLater ()

Public Member Functions
virtual	~QAbstractNetworkCache ()

virtual QNetworkCacheMetaData	metaData (const QUrl &url)=0

virtual void	updateMetaData (const QNetworkCacheMetaData &metaData)=0

virtual QIODevice *	data (const QUrl &url)=0

virtual bool	remove (const QUrl &url)=0

virtual qint64	cacheSize () const =0

virtual QIODevice *	prepare (const QNetworkCacheMetaData &metaData)=0

virtual void	insert (QIODevice *device)=0

Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)

virtual	~QObject ()

virtual bool	event (QEvent *event)

virtual bool	eventFilter (QObject watched, QEvent event)

QString	objectName () const

void	setObjectName (const QString &name)

QBindable< QString >	bindableObjectName ()

bool	isWidgetType () const

bool	isWindowType () const

bool	signalsBlocked () const noexcept

bool	blockSignals (bool b) noexcept

QThread *	thread () const

void	moveToThread (QThread *thread)

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)

void	killTimer (int id)

template<typename T >
T	findChild (const QString &aName=QString(), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<typename T >
QList< T >	findChildren (const QString &aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

const QObjectList &	children () const

void	setParent (QObject *parent)

void	installEventFilter (QObject *filterObj)

void	removeEventFilter (QObject *obj)

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const

bool	disconnect (const char signal=nullptr, const QObject receiver=nullptr, const char *member=nullptr) const

bool	disconnect (const QObject receiver, const char member=nullptr) const

void	dumpObjectTree () const

void	dumpObjectInfo () const

bool	setProperty (const char *name, const QVariant &value)

QVariant	property (const char *name) const

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

QObject *	parent () const

bool	inherits (const char *classname) const

Protected Member Functions
	QAbstractNetworkCache (QObject *parent=nullptr)

	QAbstractNetworkCache (QAbstractNetworkCachePrivate &dd, QObject *parent)

Protected Member Functions inherited from QObject
QObject *	sender () const

int	senderSignalIndex () const

int	receivers (const char *signal) const

bool	isSignalConnected (const QMetaMethod &signal) const

virtual void	timerEvent (QTimerEvent *event)

virtual void	childEvent (QChildEvent *event)

virtual void	customEvent (QEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

	QObject (QObjectPrivate &dd, QObject *parent=nullptr)

Additional Inherited Members
Signals inherited from QObject
void	destroyed (QObject *=nullptr)

void	objectNameChanged (const QString &objectName, QPrivateSignal)

Static Public Member Functions inherited from QObject
static QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)

static QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

static QMetaObject::Connection ::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 slot)

static QMetaObject::Connection ::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject context, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static std::enable_if< QtPrivate::FunctionPointer< Func2 >::ArgumentCount==-1 &&!std::is_convertible_v< Func2, const char * >, QMetaObject::Connection >::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 slot)

template<typename Func1 , typename Func2 >
static std::enable_if< QtPrivate::FunctionPointer< Func2 >::ArgumentCount==-1 &&!std::is_convertible_v< Func2, const char * >, QMetaObject::Connection >::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject context, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)

static bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &member)

static bool	disconnect (const QMetaObject::Connection &)

template<typename Func1 , typename Func2 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot)

template<typename Func1 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject receiver, void **zero)

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Properties inherited from QObject
QString	objectName
	the name of this object More...

Related Functions inherited from QObject
template< class T > T	qobject_cast (const QObject *object)

template< typename T > T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

template< typename T > QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

	QObjectList

Detailed Description

The QAbstractNetworkCache class provides the interface for cache implementations.

Since: 4.5 \inmodule QtNetwork

QAbstractNetworkCache is the base class for every standard cache that is used by QNetworkAccessManager. QAbstractNetworkCache is an abstract class and cannot be instantiated.

See also: QNetworkDiskCache

Definition at line 111 of file qabstractnetworkcache.h.

Constructor & Destructor Documentation

◆ ~QAbstractNetworkCache()

QAbstractNetworkCache::~QAbstractNetworkCache ( )

virtual

Destroys the cache.

Any operations that have not been inserted are discarded.

See also: insert()

Definition at line 445 of file qabstractnetworkcache.cpp.

◆ QAbstractNetworkCache() [1/2]

QAbstractNetworkCache::QAbstractNetworkCache ( QObject * parent = nullptr )

explicitprotected

Constructs an abstract network cache with the given parent.

Definition at line 425 of file qabstractnetworkcache.cpp.

◆ QAbstractNetworkCache() [2/2]

QAbstractNetworkCache::QAbstractNetworkCache	(	QAbstractNetworkCachePrivate &	dd,
		QObject *	parent
	)

protected

Definition at line 433 of file qabstractnetworkcache.cpp.

Member Function Documentation

◆ cacheSize()

qint64 QAbstractNetworkCache::cacheSize ( ) const

pure virtual

Returns the current size taken up by the cache. Depending upon the cache implementation this might be disk or memory size.

In the base class this is a pure virtual function.

See also: clear()

Implemented in MySpyMemoryCache, MyMemoryCache, and QNetworkDiskCache.

◆ clear

void QAbstractNetworkCache::clear ( )

pure virtualslot

Removes all items from the cache. Unless there was failures clearing the cache cacheSize() should return 0 after a call to clear.

In the base class this is a pure virtual function.

See also: cacheSize(), remove()

Implemented in MySpyMemoryCache, and MyMemoryCache.

◆ data()

QIODevice * QAbstractNetworkCache::data ( const QUrl & url )

pure virtual

Returns the data associated with url.

It is up to the application that requests the data to delete the QIODevice when done with it.

If there is no cache for url, the url is invalid, or if there is an internal cache error \nullptr is returned.

In the base class this is a pure virtual function.

See also: metaData(), prepare()

Implemented in MySpyMemoryCache, MyMemoryCache, NetworkDiskCache, QNetworkDiskCache, and NetworkDiskCache.

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◆ insert()

void QAbstractNetworkCache::insert ( QIODevice * device )

pure virtual

Inserts the data in device and the prepared meta data into the cache. After this function is called the data and meta data should be retrievable using data() and metaData().

To cancel a prepared inserted call remove() on the metadata's url.

In the base class this is a pure virtual function.

See also: prepare(), remove()

Implemented in QNetworkDiskCache, MySpyMemoryCache, and MyMemoryCache.

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◆ metaData()

QNetworkCacheMetaData QAbstractNetworkCache::metaData ( const QUrl & url )

pure virtual

Returns the meta data for the url url.

If the url is valid and the cache contains the data for url, a valid QNetworkCacheMetaData is returned.

In the base class this is a pure virtual function.

See also: updateMetaData(), data()

Implemented in NetworkDiskCache, MyMemoryCache, QNetworkDiskCache, and MySpyMemoryCache.

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◆ prepare()

QIODevice * QAbstractNetworkCache::prepare ( const QNetworkCacheMetaData & metaData )

pure virtual

Returns the device that should be populated with the data for the cache item metaData. When all of the data has been written insert() should be called. If metaData is invalid or the url in the metadata is invalid \nullptr is returned.

The cache owns the device and will take care of deleting it when it is inserted or removed.

To cancel a prepared inserted call remove() on the metadata's url.

In the base class this is a pure virtual function.