1. Apple Push Notification Service
Clay Mullis

2. Push (the technology)
- Any continuous (or negligibly intermittent) client-server connection that allows for some data payload to be sent to the client automatically

3. Examples?

4. HTTP server push
- A basic TCP/IP client/server connection where the connection is left open so the server can send a push whenever new data is ready

5. Pushlet
- the pushlet method tricks a browser into a state of constant loading. This allows the dynamic pushing of new javascript whenever new data is available

6. Long polling - not technically push, but good enough for most purposes
- involves a client issuing requests from a server at specified intervals.
- this is done often in non-push connections
- The idea is to poll the server very infrequently. If there is no content available the poll request will be left open until there ois

7. Flash XML Socket relays
- method uses a single-pixel Adobe Flash movie
- common with chat applications

8. Apple Push Notification Service
- APNS is an implementation of push technology designed specifically for their hardware/software ecosystem.
- APNS can be used to send notifications to users of Apple’s computers, tablets and phones

9. Apple Push Notification Service
Multiple providers can push to multiple devices.

10. APNS QoS - Push notifications do not get “dropped”
- Apple has built in methods for storing and resending pushes even a device is offline

11. Security
- Apple established Connection trust and Token trust to handle security - Somewhat complicated...

12. Service-to-Device Trust

13. Provider-to-Service Trust

14. Token Creation/Dispersal

15. Token Creation/Dispersal

16. Notification Payload

17. Notification Payload { "aps" : { "alert" : {
"body" : "Bob wants to play poker",
"action-loc-key" : "PLAY" },
"badge" : 5,
"acme1" : "bar",
"acme2" : [ "bang", "whiz" ] }

18. Notification Payload {
"aps" : { "alert" : "Message received from Bob" },
"acme2" : [ "bang", "whiz" ] }