No push notification working

[erossini]

Hello, I was looking at your code here https://github.com/VladislavAntonyuk/WorldExplorer/commit/8ce130a77e1ad29c70c237074b23f5971324eae4#diff-033e38b5872051a85ed80103bb7a5b65c953fd7de051ef370a98e125bdb3d697

I configured Azure with a Notification hub and set the Google part. The code for Android runs without issues but the device is not registered in the Azure portal.

I tried with different devices (emulators or real).

[VladislavAntonyuk]

Hi, do you call the code, that registers the device?

[erossini]

Yes, in the MainActivitity

protected override async void OnCreate(Bundle savedInstanceState)
{
    base.OnCreate(savedInstanceState);

    CrossFingerprint.SetCurrentActivityResolver(() => this);
    CrossMauiMTAdmob.Current.Init(this, Constants.AndroidApp, Constants.MauiMTAdmobLicence);

    await DeviceInstallationService.RegisterDevice("languageinuse", Constants.PushNotificationSecret);
}

With debug, I followed the code. I can see the call to PutAsJsonAsync(...) without errors.

[erossini]

Sorry, I noticed just now that the request received an Unauthorized error.

[erossini]

Sorry to disturb you again. I can't find why I get the Unauthorized error.

In Azure, I created a Notification hub

and the DefaultListenSharedAccessSignature is

Endpoint=sb://languageinuse.servicebus.windows.net/;SharedAccessKeyName=DefaultListenSharedAccessSignature;SharedAccessKey=11/Ecr0JEXXXGMYqCPZP4r0q89xdjlxxxxx=

So, in the MainActivity, I register the device like

await DeviceInstallationService.RegisterDevice("languageinuse", Constants.PushNotificationSecret);

where languageinuse is the name of the hub (as in the endpoint) and the secret is the last part of the string. What do I do wrong?

I noticed that in the header there is this:

httpClient.DefaultRequestHeaders.Add("x-ms-version", "2015-01");

but there is no definition of this version in the API version on line.

Thank you in advance for your help, Enrico

[VladislavAntonyuk]

It's hard to say without knowing how you setup the azure. I suggest you try again with the steps described here https://vladislavantonyuk.github.io/articles/.NET-MAUI-Push-Notifications-using-Azure-Notification-Hub.-Part-1.-Setup-Azure-Notification-Hub.

At least you should use DefaultListenSharedAccessSignature access policy and SharedAccessKey, not the secret value.

[erossini]

👋 I can't find the way to register the device and I tried quite hard. I still can't register my Windows app. So, I was working on the Android app. Using your original code, I get as a result of the call Unauthorized.

I created an Azure Notification Hub and the connection string is

Endpoint=sb://languageinuse.servicebus.windows.net/;SharedAccessKeyName=DefaultListenSharedAccessSignature;SharedAccessKey=XfPbpiz2EGlsjsjAqEmFUoZJqNV=

In the Google Firebase, I created the Server Key and added it to the configuration in the Notification Hub.

With this configuration, I call the API and I get Unauthorized.

notificationHub: languageinuse key: the last part of the connection string

[VladislavAntonyuk]

I will probably record a video with steps, that you can reproduce to solve the issue. Maybe the issue with GoogleServices.json or some other missed step.

[erossini]

Thank you so much!

[erossini]

Always me 😁 Now, I can register the app on the Azure Notification Hub. The trick was that the app must be in your Applications from personal account tab and not in the Owned applications tab.

The key I have to use in the code, is the Security key I use for registering the app or the key from the Access Policy for the Azure Notification Hub DefaultListenSharedAccessSignature? In any case, I tried both and it is now working; I always get Unauthorized.

[erossini]

I found the issue. In your code, you are using always the notificationHub variable. From the documentation, the URL is different

https://{notificationHubNamespace}.servicebus.windows.net/{notificationHub}/installations

where notificationHubNamespace is the main URL and notificationHub is the name of the hub. By any change, do you know how to implement the iOS version?

Thank you in advance, Enrico

[VladislavAntonyuk]

I don’t have Apple developer account to try and provide the example( Official documentation describes the steps to get a certificate which you need to upload to Azure portal. After that the steps in the app should be the same

[erossini]

I have the certificate. What I don't know the configuration for the deviceInstallation. For example, in Android you have this

var firebaseToken = await FirebaseMessaging.Instance.GetToken();
var deviceInstallation = new
{
    InstallationId = GetDeviceId(),
    Platform = "gcm",
    PushChannel = firebaseToken.ToString()
};

Apart from the platform that I guess is apns, what is the PushChannel? I read somewhere that I have to implement the call in this function in the AppDelegate

[Export("application:didRegisterForRemoteNotificationsWithDeviceToken:")]
public async void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken)
{
    // ...
}

[VladislavAntonyuk]

https://learn.microsoft.com/en-us/azure/notification-hubs/ios-sdk-get-started

[erossini]

I saw that document, but they explained how to configure the Azure Notification Hub. Also, this document is quite old, so, some of the steps are completely different. In the documentation, they use the Azure Notification Hub SDK and there is no indication of how to pass the deviceInstallation to the api.

[erossini]

I'm still fighting with the notification now in Apple. Do you have any idea how to fill the deviceInstallation?

var deviceInstallation = new
{
    InstallationId = UIDevice.CurrentDevice.IdentifierForVendor.AsString(),
    Platform = "apns",
    PushChannel = ??
};

I think I can use the UIDevice to get an id for the device but I have no clue how to get the PushChannel.

[VladislavAntonyuk]

this is a request to Notification Service API. I took it from here: https://learn.microsoft.com/en-us/previous-versions/azure/reference/mt621153(v=azure.100)

pushChannel - String - The PNS handle for this installation (in case of WNS the ChannelUri of the ApplicationTile).

[VladislavAntonyuk]

another suggestion: Setup it using Xamarin and Notification hub lib: https://learn.microsoft.com/en-us/azure/notification-hubs/xamarin-notification-hubs-ios-push-notification-apns-get-started and then see what request does your application send.

[erossini]

Finally, I found the solution and I wrote a post to explain all the steps to send and receive push notification from Azure Notification Hub in iOS

[VladislavAntonyuk]

Thank you, I will link your post in my article