---
title: "deferQueryRequestToNetwork(completion:)"
framework: SMS and Call Reporting
role: symbol
role_heading: Instance Method
platforms: [iOS 11.0+, iPadOS 11.0+, Mac Catalyst 13.0+, visionOS 1.0+]
path: "identitylookup/ilmessagefilterextensioncontext/deferqueryrequesttonetwork(completion:)"
---

# deferQueryRequestToNetwork(completion:)

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

## Declaration

```swift
func deferQueryRequestToNetwork(completion: @escaping @Sendable (ILNetworkResponse?, (any Error)?) -> Void)
```

```swift
func deferQueryRequestToNetwork() async throws -> ILNetworkResponse
```

## Parameters

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

## Discussion

Discussion 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 system returns the response to that request (or an error) 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 Payload: {     "_version": 1,     "query": {         "sender": "14085550001",         "message": {             "text": "This is a message"         }     },     "app": {         "version": "1.1"     } }