iOS Question Firebase Push arrives only with App Active

Luiz Fernando Orlandini · Aug 1, 2016

Hi there,

after migrate the APP to Firebase I started to deal with something weird.

The push message only arrives when I open the App. If the App stays in the background mode the message is not fired.

I have reviewed and I'm calling App.RegisterForRemoteNotifications and also called App.RegisterUserNotifications(True, True, True)

Any thoughts?

Thanks.

Erel · Aug 1, 2016

Are you setting the content-available field (you shouldn't)?

Luiz Fernando Orlandini · Aug 1, 2016

Erel said:
Are you setting the content-available field (you shouldn't)?

I'm not. That's what I'm sending in terms of payload to firebase. The message arrives, although only when the App is active.

B4X:

    public static String getFirebaseMessage(AbstractPushTO pushMessage, String token) {

        Map<String, Object> firebaseMessageMap = new HashMap<String, Object>();

        firebaseMessageMap.put("priority", "normal");

        firebaseMessageMap.put("delay_while_idle", false);

        firebaseMessageMap.put("time_to_live", 86400);

        firebaseMessageMap.put("dry_run", false);

        firebaseMessageMap.put("content_available", true);

        firebaseMessageMap.put("data", getData(pushMessage));

        firebaseMessageMap.put("to", token);



        Map<String, String> notification = new HashMap<String, String>();

        notification.put("title", pushMessage.getMessageTitle());

        notification.put("body", pushMessage.getMessageBody());

        firebaseMessageMap.put("notification", notification);



        System.out.println(jsonify(firebaseMessageMap));   

        return jsonify(firebaseMessageMap);

    }

Luiz Fernando Orlandini · Aug 1, 2016

Some more findings https://firebase.google.com/docs/cloud-messaging/concept-options

Note: If you want to send messages consisting of only custom key-values to an iOS device when the app is in the background, set custom key-value pairs in the data key and set content_available to true.

Note: On iOS, set content_available when the app server needs to send a Send-to-Sync message. An inactive client app executes your logic in the background, while an app in the foreground passes the message to didReceiveRemoteNotification:.

Tried that, although the behaviour the same still.

Luiz Fernando Orlandini · Aug 2, 2016

Erel said:
Are you setting the content-available field (you shouldn't)?

Erel,

here are my findings after a lot of tests and researches. Hope this helps you to try to help to find a better solution.

I used to have my App using the old push solution. With B4i 2.8 I started thinking to migrate to FCM, once I had a bunch of problems with Amazon SNS (just for Android, that's other thing though).

I did all the recommendations on the tutorial, and ported my server code to start sending messages via FCM, this is working good

So, I have in my App.

Scenario 01

B4X:

Private Sub Application_Start (Nav As NavigationController)
    Analytics.Initialize
    CheckForPushMessage
    fm.Initialize("fm")
End Sub

Private Sub CheckForPushMessage
    If App.LaunchOptions.IsInitialized And _
          App.LaunchOptions.ContainsKey("UIApplicationLaunchOptionsRemoteNotificationKey") Then
          Dim data As Object = App.LaunchOptions.Get("UIApplicationLaunchOptionsRemoteNotificationKey")
          Dim no As NativeObject = App
          no.GetField("delegate").RunMethod("application:didReceiveRemoteNotification:", _
            Array(App, data))
    End If
End Sub

Private Sub Application_RemoteNotification (Message As Map, CompletionHandler As CompletionHandler)
    Log("Remote notification ARRIVED:" & Message)
End Sub

When I send a message with content-available = 1, the message does not arrive in any cases.

Scenario 02

B4X:

Private Sub Application_Start (Nav As NavigationController)
    Analytics.Initialize
    fm.Initialize("fm")
End Sub

Private Sub Application_RemoteNotification (Message As Map, CompletionHandler As CompletionHandler)
    Log("Remote notification ARRIVED:" & Message)
    CompletionHandler.Complete
End Sub

When I send a message with content-available = 1, the message arrives only when the device is Active.

Scenario 03

B4X:

Private Sub Application_Start (Nav As NavigationController)
    Analytics.Initialize
    fm.Initialize("fm")
End Sub

Private Sub Application_RemoteNotification (Message As Map, CompletionHandler As CompletionHandler)
    Log("Remote notification ARRIVED:" & Message)
End Sub

When I send a message with content-available = 1, the message arrives only when the device is Active.

Conclusion
Based on this we potentially need some extra piece of code to make it works, or even to open a hot fix on B4i.

Thoughts?

Thanks in advance.

Erel · Aug 2, 2016

Luiz Fernando Orlandini said:
I'm not.

Actually you are.

Please start with the exact code from the tutorial and use the B4J code to send the messages. Once it works you can modify it.
https://www.b4x.com/android/forum/t...ions-push-messages-server-not-required.68645/

Luiz Fernando Orlandini · Aug 2, 2016

Erel said:
Actually you are.

Please start with the exact code from the tutorial and use the B4J code to send the messages. Once it works you can modify it.
https://www.b4x.com/android/forum/t...ions-push-messages-server-not-required.68645/

Erel,

I did a different set of tests with the content_available tag (true and false combinations) and all of them without success.

In the B4J code we have:

B4X:

Private Sub SendMessage(Topic As String, Title As String, Body As String)
    Dim Job As HttpJob
    Job.Initialize("fcm", Me)
    Dim m As Map = CreateMap("to": $"/topics/${Topic}"$)
    Dim data As Map = CreateMap("title": Title, "body": Body)
    If Topic.StartsWith("ios_") Then
        Dim iosalert As Map =  CreateMap("title": Title, "body": Body, "sound": "default")
        m.Put("notification", iosalert)
        m.Put("priority", 10)
    End If
    m.Put("data", data)
    Dim jg As JSONGenerator
    jg.Initialize(m)
    Job.PostString("https://fcm.googleapis.com/fcm/send", jg.ToString)
    Job.GetRequest.SetContentType("application/json;charset=UTF-8")
    Job.GetRequest.SetHeader("Authorization", "key=" & API_KEY)
End Sub

And this allows us to work only with notifications. I'm not quite sure. Is this any kind of restrictions (combine notification and data push message in the payload) at this point?

Thanks for your support and patience.

Erel · Aug 3, 2016

Luiz Fernando Orlandini said:
Is this any kind of restrictions (combine notification and data push message in the payload) at this point?

No. However for us to help you, you must provide accurate information. I cannot guess from your posts what you are trying to do.

Why are you setting content-available? If you want to send silent notifications then follow this tutorial: https://www.b4x.com/android/forum/threads/silent-push-notifications.56016/#content

Luiz Fernando Orlandini · Aug 3, 2016

Erel said:
No. However for us to help you, you must provide accurate information. I cannot guess from your posts what you are trying to do.

Why are you setting content-available? If you want to send silent notifications then follow this tutorial: https://www.b4x.com/android/forum/threads/silent-push-notifications.56016/#content

I'm not trying to send a silent notifications. I can remove content-availave tag from payload, that not a big deal

Although this does not solve my problem. I just need to receive a push notification when my APP is in background and foreground modes. But please note that my payload is very different.

I'm not using topics and I'm sending messages direct to users with data + notifications datas. And this is not supported nowadays by B4J.

Messages with both notification and data payloads
App behavior when receiving messages that include both notification and data payloads depends on whether the app is in the background or the foreground—essentially, whether or not it is active at the time of receipt.

When in the background, apps receive the notification payload in the notification tray, and only handle the data payload when the user taps on the notification.

When in the foreground, your app receives a message object with both payloads available.

Here is a JSON-formatted message containing both the notification key and the data key:
{
"to":"APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx...",
"notification":{
"body":"great match!",
"title":"Portugal vs. Denmark",
"icon":"myicon"
},
"data":{
"Nick":"Mario",
"Room":"PortugalVSDenmark"
}
}

Thanks.

Erel · Aug 3, 2016

Luiz Fernando Orlandini said:
And this is not supported nowadays by B4J.

It is supported. I can only ask you to go over the tutorial again...

Luiz Fernando Orlandini · Aug 3, 2016

Erel said:
It is supported. I can only ask you to go over the tutorial again...

Well... I will try

Thanks.

Luiz Fernando Orlandini · Aug 4, 2016

Luiz Fernando Orlandini said:
Well... I will try

Thanks.

Hey Erel, Many thanks. I appreciate the support! You're always correct =D

I was missing the "priority" tag for iOS that is a bit different. From iOS we should use 5 to 10 values instead of normal or high that's the reason the push was not firing.

Thanks.

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