Instance Method


Tells the system to pass the current query request to the app extension's associated network service.


func deferQueryRequestToNetwork(completion: @escaping (ILNetworkResponse?, Error?) -> Void)



A completion block that contains either the network response to the HTTPS request or an error.


When your Message Filter app extension calls this method to defer a query to its associated server, the system performs an HTTPS network request to a URL specified in the app extension's Info.plist file. The response to that request (or an error) is returned asynchronously in an ILNetworkResponse object.

To make a network request on behalf of a Message Filter app extension, the system uses an HTTP POST request formatted in JSON, similar to the request shown below.

POST /server-endpoint HTTP/1.1
Accept: */*
Content-Type: application/json; charset=utf-8
Content-Length: 148
    "_version": 1,
    "query": {
        "sender": "14085550001",
        "message": {
            "text": "This is a message"
    "app": {
        "version": "1.1"