I have a gcm topic which have 2 million users .Can some one please suggest a way to know the number of successful deliveries for a particular message ,other than the way client acknowledges the same? I need a server side option to know the number of succesful deliveries for gcm topic messages.
Currently when I send the following post request
https://gcm-http.googleapis.com/gcm/send
Content-Type:application/json
Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA
{
"to": "/topics/foo-bar",
"data": {
"message": "This is a GCM Topic Message!",
}
}
I am able to get only the following response:
{ "message_id": "10" }