QAbstractNetworkCache Class The QAbstractNetworkCache class provides the interface for cache implementations. More...  
 Header:
 #include <QAbstractNetworkCache> 


 qmake:
 QT += network


 Since:
 Qt 4.5


 Inherits:
 QObject



 Inherited By:
 QNetworkDiskCache 


 List of all members, including inherited members  Public Functions  
 virtual 

~QAbstractNetworkCache()
 
 virtual qint64 

cacheSize() const = 0
 
 virtual QIODevice *

data(const QUrl &url) = 0
 
 virtual void 

insert(QIODevice *device) = 0
 
 virtual QNetworkCacheMetaData 

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

prepare(const QNetworkCacheMetaData &metaData) = 0
 
 virtual bool 

remove(const QUrl &url) = 0
 
 virtual void 

updateMetaData(const QNetworkCacheMetaData &metaData) = 0
   32 public functions inherited from QObject
  Public Slots  
 virtual void 

clear() = 0
   1 public slot inherited from QObject
  Protected Functions  
 

QAbstractNetworkCache(QObject *parent = Q_NULLPTR)
   9 protected functions inherited from QObject
  Additional Inherited Members  1 property inherited from QObject
 2 signals inherited from QObject
 11 static public members inherited from QObject
  Detailed Description The QAbstractNetworkCache class provides the interface for cache implementations. 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. Member Function Documentation 
[protected] QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069QAbstractNetworkCache(QObject *parent = Q_NULLPTR) Constructs an abstract network cache with the given parent. 
[virtual] QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069~QAbstractNetworkCache() Destroys the cache. Any operations that have not been inserted are discarded. See also insert(). 
[pure virtual] qint64 QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069cacheSize() const 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(). 
[pure virtual slot] void QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069clear() 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() and remove(). 
[pure virtual] QIODevice *QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069data(const QUrl &url) 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 0 is returned. In the base class this is a pure virtual function. See also metaData() and prepare(). 
[pure virtual] void QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069insert(QIODevice *device) 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() and remove(). 
[pure virtual] QNetworkCacheMetaData QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069metaData(const QUrl &url) 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() and data(). 
[pure virtual] QIODevice *QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069prepare(const QNetworkCacheMetaData &metaData) 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 0 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. See also remove(), updateMetaData(), and insert(). 
[pure virtual] bool QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069remove(const QUrl &url) Removes the cache entry for url, returning true if success otherwise false. In the base class this is a pure virtual function. See also clear() and prepare(). 
[pure virtual] void QAbstractNetworkCach8b7c:f320:99b9:690f:4595:cd17:293a:c069updateMetaData(const QNetworkCacheMetaData &metaData) Updates the cache meta date for the metaData's url to metaData If the cache does not contains a cache item for the url then no action is taken. In the base class this is a pure virtual function. See also metaData() and prepare().

    
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