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APNS

Vapor's Apple Push Notification Service (APNS) API makes it easy to authenticate and send push notifications to Apple devices. It's built on top of APNSwift.

Getting Started

Let's take a look at how you can get started using APNS.

Package

The first step to using APNS is adding the package to your dependencies.

// swift-tools-version:5.2
import PackageDescription

let package = Package(
    name: "my-app",
    dependencies: [
         // Other dependencies...
        .package(url: "https://github.com/vapor/apns.git", from: "1.0.0"),
    ],
    targets: [
        .target(name: "App", dependencies: [
            // Other dependencies...
            .product(name: "APNS", package: "apns")
        ]),
        // Other targets...
    ]
)

If you edit the manifest directly inside Xcode, it will automatically pick up the changes and fetch the new dependency when the file is saved. Otherwise, from Terminal, run swift package resolve to fetch the new dependency.

Configuration

The APNS module adds a new property apns to Application. To send push notifications, you will need to set the configuration property with your credentials.

import APNS

// Configure APNS using JWT authentication.
app.apns.configuration = try .init(
    authenticationMethod: .jwt(
        key: .private(filePath: <#path to .p8#>),
        keyIdentifier: "<#key identifier#>",
        teamIdentifier: "<#team identifier#>"
    ),
    topic: "<#topic#>",
    environment: .sandbox
)

Fill in the placeholders with your credentials. The above example shows JWT-based auth using the .p8 key you get from Apple's developer portal. For TLS-based auth with a certificate, use the .tls authentication method:

authenticationMethod: .tls(
    privateKeyPath: <#path to private key#>,
    pemPath: <#path to pem file#>,
    pemPassword: <#optional pem password#>
)

Send

Once APNS is configured, you can send push notifications using apns.send method on Application or Request.

// Send a push notification.
try app.apns.send(
    .init(title: "Hello", subtitle: "This is a test from vapor/apns"),
    to: "98AAD4A2398DDC58595F02FA307DF9A15C18B6111D1B806949549085A8E6A55D"
).wait()

Use req.apns whenever you are inside of a route handler.

// Sends a push notification.
app.get("test-push") { req -> EventLoopFuture<HTTPStatus> in
    req.apns.send(..., to: ...)
        .map { .ok }
}

The first parameter accepts the push notification alert and the second parameter is the target device token.

Alert

APNSwiftAlert is the actual metadata of the push notification alert to send. More details on the specifics of each property are provided here. They follow a one-to-one naming scheme listed in Apple's documentation

let alert = APNSwiftAlert(
    title: "Hey There", 
    subtitle: "Full moon sighting", 
    body: "There was a full moon last night did you see it"
)

This type can be passed directly to the send method and it will be wrapped in an APNSwiftPayload automatically.

Payload

APNSwiftPayload is the metadata of the push notification. Things like the alert, badge count. More details on the specifics of each property are provided here. They follow a one-to-one naming scheme listed in Apple's documentation

let alert = ...
let aps = APNSwiftPayload(alert: alert, badge: 1, sound: .normal("cow.wav"))

This can be passed to the send method.

Custom Notification Data

Apple provides engineers with the ability to add custom payload data to each notification. In order to facilitate this we have the APNSwiftNotification.

struct AcmeNotification: APNSwiftNotification {
    let acme2: [String]
    let aps: APNSwiftPayload

    init(acme2: [String], aps: APNSwiftPayload) {
        self.acme2 = acme2
        self.aps = aps
    }
}

let aps: APNSwiftPayload = ...
let notification = AcmeNotification(acme2: ["bang", "whiz"], aps: aps)

This custom notification type can be passed to the send method.

More Information

For more information on available methods, see APNSwift's README.