Downloads a proxy autoconfiguration script and executes it.
- iOS 2.0+
- macOS 10.5+
- Mac Catalyst 13.0+
- tvOS 9.0+
The URL of the autoconfiguration script.
The URL that your application intends to eventually download using the proxies.
A callback to be called when execution of the script is finished.
A stream context containing a client info object and optionally retain and release callbacks for that object.
This function returns a run loop source that the caller should schedule. Once downloading and execution of the script has completed, the specified callback function is called.