When the app extension defers a query request to a server, the system handles all network communication, passing the request to the server and passing the server's response back to the app extension.
@janxin 你是开发者吗?不能拘泥于文字细节。需要融会贯通。 Note: For privacy reasons, the system handles all communication with your associated server; your Message Filter app extension can't access the network directly. Also for privacy reasons, your app extension can't write data to containers shared with the containing app.