google chrome - Are GCM subscription IDs and instance IDs the same thing? (subscribe to topics via web) -


i'm trying set gcm html5 push notifications through chrome. want these subscriptions use topics, don't have maintain list of subscribed ids myself. however, of topic documentation can find refers subscribing through ios , android apis, not through web.

i found documentation on relationship mapping makes seem can control topic subscriptions sending requests server, requires instance id. documentation i've been able find chrome web notifications talks subscription id.

are same? i.e., send subscription id server, forward onto gcm server api? or instance id , subscription id 2 different things? don't same in examples provided (the instance id start xxxxxx:yyyyy) i'm concerned won't work.

to answer own question: in fact 1 , same. unfortunately, seems topics not work chrome push notifications. api displays topic message being sent, browser never receives it.


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