QAbstractNetworkCache¶
Inherited by: QNetworkDiskCache
Detailed Description¶
The PySide.QtNetwork.QAbstractNetworkCache class provides the interface for cache implementations.
PySide.QtNetwork.QAbstractNetworkCache is the base class for every standard cache that is used be PySide.QtNetwork.QNetworkAccessManager . PySide.QtNetwork.QAbstractNetworkCache is an abstract class and cannot be instantiated.
See also
- class PySide.QtNetwork.QAbstractNetworkCache([parent=None])¶
Parameters: parent – PySide.QtCore.QObject Constructs an abstract network cache with the given parent .
- PySide.QtNetwork.QAbstractNetworkCache.cacheSize()¶
Return type: PySide.QtCore.qint64 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.
- PySide.QtNetwork.QAbstractNetworkCache.clear()¶
Removes all items from the cache. Unless there was failures clearing the cache PySide.QtNetwork.QAbstractNetworkCache.cacheSize() should return 0 after a call to clear.
In the base class this is a pure virtual function.
- PySide.QtNetwork.QAbstractNetworkCache.data(url)¶
Parameters: url – PySide.QtCore.QUrl Return type: PySide.QtCore.QIODevice Returns the data associated with url .
It is up to the application that requests the data to delete the PySide.QtCore.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.
- PySide.QtNetwork.QAbstractNetworkCache.insert(device)¶
Parameters: device – PySide.QtCore.QIODevice 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 PySide.QtNetwork.QAbstractNetworkCache.data() and PySide.QtNetwork.QAbstractNetworkCache.metaData() .
To cancel a prepared inserted call PySide.QtNetwork.QAbstractNetworkCache.remove() on the metadata’s url.
In the base class this is a pure virtual function.
- PySide.QtNetwork.QAbstractNetworkCache.metaData(url)¶
Parameters: url – PySide.QtCore.QUrl Return type: PySide.QtNetwork.QNetworkCacheMetaData Returns the meta data for the url url .
If the url is valid and the cache contains the data for url, a valid PySide.QtNetwork.QNetworkCacheMetaData is returned.
In the base class this is a pure virtual function.
- PySide.QtNetwork.QAbstractNetworkCache.prepare(metaData)¶
Parameters: metaData – PySide.QtNetwork.QNetworkCacheMetaData Return type: PySide.QtCore.QIODevice Returns the device that should be populated with the data for the cache item metaData . When all of the data has been written PySide.QtNetwork.QAbstractNetworkCache.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 PySide.QtNetwork.QAbstractNetworkCache.remove() on the metadata’s url.
In the base class this is a pure virtual function.
- PySide.QtNetwork.QAbstractNetworkCache.remove(url)¶
Parameters: url – PySide.QtCore.QUrl Return type: PySide.QtCore.bool Removes the cache entry for url , returning true if success otherwise false.
In the base class this is a pure virtual function.
- PySide.QtNetwork.QAbstractNetworkCache.updateMetaData(metaData)¶
Parameters: metaData – PySide.QtNetwork.QNetworkCacheMetaData 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.
