Sent to determine whether the delegate is able to respond to a protection space’s form of authentication.
- macOS 10.6+
The download sending the message.
The protection space that generates an authentication challenge.
This method is called before
download:, allowing the delegate to inspect a protection space before attempting to authenticate against it. By returning
YES, the delegate indicates that it can handle the form of authentication, which it does in the subsequent call to
download:. Not implementing this method is the same as returning
NO, in which case default authentication handling is used.