How to build a server and a iPhone client application using the Apple Push Notification Service

How to build a server and a iPhone client application using the Apple Push Notiﬁcation Service 2009/7/21 @ actindi Shu MASUDA

2 Apple Push Notiﬁcation Service (APNs) What is the Apple Push Notiﬁcation Service? ‣ iPhone OS 3.0 ‣ 3 • Alert • Badge • Sound ‣

3 Client Implementation Overview ★ APNs • UIApplication registerForRemoteNotificationTypes: • UIApplication application:didRegisterForRemoteNotificationsWithDeviceToken: Device Token ★ APNs • UIApplicationDelegate application:didReceiveRemoteNotification: • UIApplication Delegate applicationDidFinishLaunching:

4 Client Implementation • Xcode

5 Server Implementation Overview 1. App ID 2. 3. Interface APNS 4. Ruby

6 Generating App ID Bundle Identiﬁer ”*”

6 Generating App ID Enable for Apple Push Notiﬁcation service

7 Generating Key 1. p12 pem • openssl pkcs12 -clcerts -nokeys -out apns-dev-cert.pem -in apns-dev-cert.p12 • openssl pkcs12 -nocerts -out apns-dev-key.pem -in apns-dev- key.p12 2. 1. • openssl rsa -in apns-dev-key.pem -out apns-dev-key- noenc.pem 3. • cat apns-dev-cert.pem apns-dev-key-noenc.pem > apns-dev.pem 4. OpenSSL • openssl s_client -connect gateway.sandbox.push.apple.com: 2195 -prexit -state -cert apns-dev-cert.pem -key apns-dev- key-noenc.pem

8 Creating the Push Notiﬁcation Interface • Binary format of the push notiﬁcation interface • (payload) JSON { “aps”: { “alert”: “You’ve got a mail!”, “badge”: 1, “sound”: “default” } }

9 Implementation in Ruby ★ Ruby • pack? unpack?? or ... ??? •

10 Implementation in Ruby #! /usr/bin/env ruby # -*- encoding: utf-8 -*- require 'socket' require 'openssl' socket = TCPSocket.new('gateway.sandbox.push.apple.com', 2195) context = OpenSSL::SSL::SSLContext.new('SSLv3') context.cert = OpenSSL::X509::Certiﬁcate.new(File.read('apns-dev.pem')) context.key = OpenSSL::PKey::RSA.new(File.read('apns-dev-key-noenc.pem')) ssl = OpenSSL::SSL::SSLSocket.new(socket, context) ssl.connect device_token = ['XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'] payload = <<-EOS { "aps": { "alert": "#{alert}", "badge": 2, “sound”: “default” } } EOS (message = []) << ['0'].pack('H') << [32].pack('n') << device_token.pack('H*') << [payload.size].pack('n') << payload ssl.write(message.join('')) ssl.close socket.close

It’s time to Demo!

12 ★ • Miss Piggy • Catherine Miss Piggy • Mr. Kermit iPhone ★ Miss Piggy Cathy (Catherine) Miss Piggy Miss Piggy Cathy Kermit Miss Piggy Kermit iPhone Push Notiﬁcation

13 References • Apple Push Notification Service Programming Guide http://developer.apple.com/iphone/library/documentation/NetworkingInternet/Conceptual/ RemoteNotificationsPG/Introduction/Introduction.html • How to build an Apple Push Notification provider server (tutorial) « Boxed Ice Blog http://blog.boxedice.com/2009/07/10/how-to-build-an-apple-push-notification-provider- server-tutorial/ • Ruby - pack http://www.ruby-lang.org/ja/man/html/ pack_A5C6A5F3A5D7A5ECA1BCA5C8CAB8BBFACEF3.html • SSL - 2008-01-03 - http://d.hatena.ne.jp/shinichiro_h/20080103#1199305204

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How to build a server and a iPhone client application using the Apple Push Notification Service

by Shu Masuda on Jul 27, 2009

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