Deliver notifications with invalid token

[Emad Hosseini]

I have asked this question in StackOverflow and I have been directed to ask this question again in this forum maybe you can help me.

I'm sending push notifications to android device using GCM service and the token that is sent by device. Everything is working well. Now if I change the device token and add an arbitrary string to the start of the token GCM still sends the notification. But if I add something to end of the token Google responds with error! Here is a successful token:

testen0xLucMNBo:APA91bEkZjKCUVT30O7J9OMZoUWmjdRb3jIFfRBwp62hgK3JEbJ20MlPvpKWXkQj8YMKuVHOyhNfRiG5Op1lh68iT_D_-81JhKXhLVYi1KrWx1Qu7L6WSnm9-oOhFHdKsmjo-qm_9Ana

Notice the test in the beginning of token. That's what I added.

And this is what google replies.

{"multicast_id":8394350681994886128,"success":1,"failure":0,"canonical_ids":0,"results":[{"message_id":"0:1479811125743676%3595830d66d6cf16"}]}

Also I got a hint that the actual token happens after the "APA" part and now I'm wondering what the first part is?

Is it a normal behavior? Is there such a behavior specified in Google docs anywhere?

[Diego Giorgini]

The first part of the token is the InstanceID-ID. see InstanceID.getInstance().getId()

That part is not essential for authorization, this is why you can change it.

That said please treat the token as an opaque string.

We might start to enforce the match of first part, or we could change the format in the future.

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[Emad Hosseini]

Actually I treated the token as opaque string but the problem is you don't! And that caused me more than 10,000 gibberish notifications.

[Massimiliano]

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Thanks.


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