messaging().setBackgroundMessageHandler not trigger on iOs when app is in background state and dev mode only

[ND-creator]

Hello,

I implemented push notification (data-only/silent notif) with notifee on client side, and fcm firebase-admin on nodejs server side. It works fine on Android, and on iOs it works fine with TestFlight but in dev mode messaging().setBackgroundMessageHandler() do not trigger when the app is in background or quit state, i receive push notif only in foreground state. Do you have any idea how to resolve it please ?

Thank you, have a good day

[upngo]

have you added content_available: 1 to the top level of your request?

[mikehardy]

Note the casing there (content_available) depends on the SDK you are using, it could be the firebase-admin-sdk, or Python or direct JSON via REST - so it may be content-available or contentAvailable or content_available - carefully check the docs for your SDK

[ND-creator]

Thank you for your response! Yes from my server i added contentAvailable:true and when i check in the logger of my ios app, i receive content-available:1 so i guess it works fine.

@mikehardy you said whatsapp use notification blocks + extension. I did not know for this extension part but there is something i don't unterstand: it is said push notification extension exists only for modifying the content of the notification and/or download url image => Whatsapp should not be able to confirm delivery push and store the data inside the app ? that's why i tought they use data-only notification.

My application is in react native and i need top reliability for push notifications because this is a very sensitive app. I guess i should forget about data-only message to handle in the background. I am quite lost on how to get the top push reliability.
I need to store data inside a sql table and read data from AsyncStorage in order to know which sound to play (because user can custom sound in the app only), i guess there is no solution for this ?

[mikehardy]

No need to overthink it. The decision tree works like this: Do you need reliable delivery on iOS? If yes, you must include a notification block.