APN (Apple Push Notifications)

APN (Apple Push Notifications)

1. centerpiece of the remote notifications feature.

2. Two Main connections

   • Connects a channel between APN servers and app
     • How to Configure Remote Notification Support.
       • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CreatingtheNotificationPayload.html#//apple_ref/doc/uid/TP40008194-CH10-SW1
     • Notification delivery to app
       • if its connected then notification arrives if not then APN servers tries again later
       • Quality of Service, Store-and-Forward, and Coalesced Notifications
         • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/APNSOverview.html#//apple_ref/doc/uid/TP40008194-CH8-SW5
     • APNs-to-Device Connection Trust and Device Tokens
       • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/APNSOverview.html#//apple_ref/doc/uid/TP40008194-CH8-SW13
   • Connection between provider and APN
     • Provider
       • provider: server, that deploys and manages notifications
       • Responsabilities
         • Receiving, via APNs, globally-unique, app-specific device tokens and other relevant data from instances of your app on user devices.
         • Determining, according to the design of your notification system, when remote notifications need to be sent to each device.
         • Building and sending notification requests to APNs
       • Notification Request
         • notification’s payload: JSON dictionary
           • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CreatingtheNotificationPayload.html#//apple_ref/doc/uid/TP40008194-CH10-SW1
         • a globally-unique device token: HTTP/2 request.
           • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/APNSOverview.html#//apple_ref/doc/uid/TP40008194-CH8-SW13
         • Send the HTTP/2 request to APNs
           • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CommunicatingwithAPNs.html#//apple_ref/doc/uid/TP40008194-CH11-SW1
     • Communicating with APNs
       • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CommunicatingwithAPNs.html#//apple_ref/doc/uid/TP40008194-CH11-SW1

3. Security Architecture

   • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/APNSOverview.html#//apple_ref/doc/uid/TP40008194-CH8-SW9
   • Provider-to-APNs connection trust
     • https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/APNSOverview.html#//apple_ref/doc/uid/TP40008194-CH8-SW4
     • must employ a valid authentication key certificate (for token-based connection trust) or SSL certificate (for certificate-based connection trust)
   • APNs-to-device connection trust
     • Device token trust works end-to-end for each remote notification

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