QNetworkCacheMetaData Class

The QNetworkCacheMetaData class provides cache information. 更多...

头：	#include <QNetworkCacheMetaData>
qmake:	QT += network
Since:	Qt 4.5

该类在 Qt 4.5 引入。

所有成员列表，包括继承成员

公共类型

typedef	AttributesMap
typedef	RawHeader
typedef	RawHeaderList

公共函数

	QNetworkCacheMetaData (const QNetworkCacheMetaData & other )
	QNetworkCacheMetaData ()
QNetworkCacheMetaData &	operator= (const QNetworkCacheMetaData & other )
	~QNetworkCacheMetaData ()
QNetworkCacheMetaData::AttributesMap	属性 () const
QDateTime	expirationDate () const
bool	isValid () const
QDateTime	lastModified () const
QNetworkCacheMetaData::RawHeaderList	rawHeaders () const
bool	saveToDisk () const
void	setAttributes (const QNetworkCacheMetaData::AttributesMap & 属性 )
void	setExpirationDate (const QDateTime & dateTime )
void	setLastModified (const QDateTime & dateTime )
void	setRawHeaders (const QNetworkCacheMetaData::RawHeaderList & list )
void	setSaveToDisk (bool allow )
void	setUrl (const QUrl & url )
void	swap (QNetworkCacheMetaData & other )
QUrl	url () const
bool	operator!= (const QNetworkCacheMetaData & other ) const
bool	operator== (const QNetworkCacheMetaData & other ) const

QDataStream &	operator<< (QDataStream & out , const QNetworkCacheMetaData & metaData )
QDataStream &	operator>> (QDataStream & in , QNetworkCacheMetaData & metaData )

详细描述

QNetworkCacheMetaData provides information about a cache file including the url, when it was last modified, when the cache file was created, headers for file and if the file should be saved onto a disk.

另请参阅 QAbstractNetworkCache .

成员类型文档编制

typedef QNetworkCacheMetaData:: AttributesMap

同义词 QHash < QNetworkRequest::Attribute , QVariant >

typedef QNetworkCacheMetaData:: RawHeader

同义词 QPair < QByteArray , QByteArray >

typedef QNetworkCacheMetaData:: RawHeaderList

同义词 QList < RawHeader >

成员函数文档编制

QNetworkCacheMetaData:: QNetworkCacheMetaData (const QNetworkCacheMetaData & other )

构造副本为 other QNetworkCacheMetaData.

QNetworkCacheMetaData:: QNetworkCacheMetaData ()

Constructs an invalid network cache meta data.

另请参阅 isValid ().

QNetworkCacheMetaData &QNetworkCacheMetaData:: operator= (const QNetworkCacheMetaData & other )

Makes a copy of the other QNetworkCacheMetaData and returns a reference to the copy.

QNetworkCacheMetaData:: ~QNetworkCacheMetaData ()

Destroys the network cache meta data.

QNetworkCacheMetaData::AttributesMap QNetworkCacheMetaData:: 属性 () const

Returns all the attributes stored with this cache item.

该函数在 Qt 4.6 引入。

另请参阅 setAttributes () 和 QNetworkRequest::Attribute .

QDateTime QNetworkCacheMetaData:: expirationDate () const

Returns the date and time when the meta data expires.

另请参阅 setExpirationDate ().

bool QNetworkCacheMetaData:: isValid () const

返回 true if this network cache meta data has attributes that have been set otherwise false.

QDateTime QNetworkCacheMetaData:: lastModified () const

Returns the date and time when the meta data was last modified.

另请参阅 setLastModified ().

QNetworkCacheMetaData::RawHeaderList QNetworkCacheMetaData:: rawHeaders () const

Returns a list of all raw headers that are set in this meta data. The list is in the same order that the headers were set.

另请参阅 setRawHeaders ().

bool QNetworkCacheMetaData:: saveToDisk () const

Returns is this cache should be allowed to be stored on disk.

Some cache implementations can keep these cache items in memory for performance reasons, but for security reasons they should not be written to disk.

Specifically with http, documents with Cache-control set to no-store or any https document that doesn't have "Cache-control: public" set will set the saveToDisk to false.

另请参阅 setSaveToDisk ().

void QNetworkCacheMetaData:: setAttributes (const QNetworkCacheMetaData::AttributesMap & 属性 )

Sets all attributes of this cache item to be the map 属性 .

该函数在 Qt 4.6 引入。

另请参阅 属性 () 和 QNetworkRequest::setAttribute ().

void QNetworkCacheMetaData:: setExpirationDate (const QDateTime & dateTime )

Sets the date and time when the meta data expires to dateTime .

另请参阅 expirationDate ().

void QNetworkCacheMetaData:: setLastModified (const QDateTime & dateTime )

Sets the date and time when the meta data was last modified to dateTime .

另请参阅 lastModified ().

void QNetworkCacheMetaData:: setRawHeaders (const QNetworkCacheMetaData::RawHeaderList & list )

Sets the raw headers to list .

另请参阅 rawHeaders ().

void QNetworkCacheMetaData:: setSaveToDisk ( bool allow )

Sets whether this network cache meta data and associated content should be allowed to be stored on disk to allow .

另请参阅 saveToDisk ().

void QNetworkCacheMetaData:: setUrl (const QUrl & url )

Sets the URL this network cache meta data to be url .

The password and fragment are removed from the url.

另请参阅 url ().

void QNetworkCacheMetaData:: swap ( QNetworkCacheMetaData & other )

Swaps this metadata instance with other 。此函数非常快且从不失败。

该函数在 Qt 5.0 引入。

QUrl QNetworkCacheMetaData:: url () const

Returns the URL this network cache meta data is referring to.

另请参阅 setUrl ().

bool QNetworkCacheMetaData:: operator!= (const QNetworkCacheMetaData & other ) const

返回 true if this meta data is not equal to the other meta data; otherwise returns false .

另请参阅 operator== ().

bool QNetworkCacheMetaData:: operator== (const QNetworkCacheMetaData & other ) const

返回 true if this meta data is equal to the other meta data; otherwise returns false .

另请参阅 operator!= ().