CFXMLParserResolveExternalEntityCallBack
Callback function invoked by the parser to notify your application that an external entity has been referenced.
Declaration
typealias CFXMLParserResolveExternalEntityCallBack = (CFXMLParser?, UnsafeMutablePointer<CFXMLExternalID>?, UnsafeMutableRawPointer?) -> Unmanaged<CFData>?Parameters
- parser:
The CFXMLParser object making the callback.
- extID:
The identifier for the external entity.
- info:
The program-defined context data you specified in the Cfxmlparsercontext structure when creating the parser.
Return Value
The external entity or NULL if it should not be resolved.
Discussion
If this callback is not defined, the parser uses its internal routines to try and resolve the entity. Otherwise, if this callback returns NULL, a place holder for the external entity is inserted into the tree. In this manner, the parser’s client can prevent any external network or file accesses. This callback is optional.