iPhone personalized push notification with client id - how?

I'm starting with push notifications on the iPhone. I've read the documentation and s开发者_如何学Ceveral tutorials. What I want to do: My server stores app-settings, stored by the user. Depending on these settings I want to send him a push notification.

Example: Switch for "Weather warnings" is ON -> send notification to this client Switch for "Weather warnings" is OFF -> don't send notification to this client

Similar to Facebook, when it lets you know, that someone has posted a message on your board.

How might the server be able to know that "token XYZ" matches to "clientId XYZ"?

Thanks in advance, Steve

Use device UDID as key and then bind to it PUSH token for device. With HTTP request you will send UDID+token pairs and store them on server. When user on device changes it's settings, you send them with device UDID on server.