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Presentation on sending push notifications with Zend Framework based on work to create Zend_Mobile_Push. Currently handles APNs (iPhone/iPad/iTouch), C2DM (Android) and MPNS (Windows Mobile). Additionally mentions of sending push notifications with WAP PAP (BlackBerry).
MNPHP January 5, 2012ZF: Push Notifications By Mike Willbanks Software Engineering Manager CaringBridge
About Mike… • Software Engineering Manager at CaringBridge • Open Source Contributor • Where you can find me: Twitter: mwillbanks G+: Mike Willbanks IRC (freenode): lubs Blog: http://blog.digitalstruct.com2
Agenda • Overview of Push Notifications • Overview of Zend_Mobile [_Push] Not currently implemented in ZF 1.x; maybe ZF 1.12. • Android Push Notifications (C2DM) • Apple Push Notifications (APNS) • Microsoft Push Notifications • BlackBerry Push Notifications • Questions Although you can bring them up at anytime!3
OverviewWhat are they?What is the benefit?High level; how do these things work?
What Are They • Push Notifications… Are a message pushed to a central location and delivered to you. Are (often) the same thing at a pub/sub model. In the Mobile Space… • These messages often contain other technologies such as alerts, tiles, or raw data.5
Battery Life • Push notification services for mobile are highly efficient; it runs in the device background and enables your application to receive the message. • The other part of this; if you implemented it otherwise you would be polling. This not only wastes precious battery but also wastes their bandwidth. NOTE: This is not always true; if you are sending data to the phone more often than a poll would do in 15 minutes; you are better off implementing polling.10
Delivery • When you poll; things are generally 15+ minutes out to save on battery. In a push notification these happen almost instantly. We’ve generally seen within 1-3s between sending a push notification to seeing it arrive on the device. • Additionally; push notifications can be sent to the device even if it is offline or turned off. • However, not all messages are guaranteed for delivery You may hit quotas Some notification servers only allow a single message to be in queue at 1 time (some group by collapse key), and others remove duplicates.12
Overview of Zend_Mobile_Push • Created Zend_Mobile component in November because I was irritated with the other libraries that currently existed. • More fluid way of sending push notifications. • Requires Zend Framework 1.x Hopefully will make it into the ZF 1.12 release planned within the next month or two. • Handles sending push notifications to 3 systems APNS, C2DM and MPNS • Library is located in my GitHub account https://github.com/mwillbanks/Zend_Mobile18
Setting up the Library • Git clone the package somewhere you would like it to live. • Adjust your include_path (likely set in index.php) • You’re ready to rock! • Hopefully; in the future you won’t have to do anything 19
Walking Through AndroidUnderstanding C2DMAnatomy of a MessagePushing MessagesDisplaying Items on the Client
Understanding C2DM • It allows third-party application servers to send lightweight messages to their Android applications. • C2DM makes no guarantees about delivery or the order of messages. • An application on an Android device doesn’t need to be running to receive messages. • It does not provide any built-in user interface or other handling for message data. • It requires devices running Android 2.2 or higher that also have the Market application installed. • It uses an existing connection for Google services (Through the Google Market)21
Registering for C2DM • First things first – you must sign up to actually utilize C2DM http://code.google.com/android/c2dm/signup.html C2DM only works on Android w/ Google Market • Basically excludes: Amazon Kindle Fire.22
Handling the Registration (or Unregistering) • Registration / Registration Updates and Unregistering. • Registration is generally on app start up. • Be nice and allow your users to unregister from the push notification service 26
Example Receiver More at: http://bit.ly/bxOoMO towards end of article.27
Implementing a Server • Some limitations 200K messages per day by default; use them wisely however you may request more. 1K message payload maximum. You must implement incremental back off.28
Apple Push NotificationsA brief walk-through on implementing notifications on theiPhone.
Understanding APNS • The maximum size allowed for a notification payload is 256 bytes. • It allows third-party application servers to send lightweight messages to their iPhone/iPad applications. • Apple makes no guarantees about delivery or the order of messages. • An application on an iPhone/iPad device doesn’t need to be running to receive messages. • Message adheres to strict JSON but is abstracted away for us in how we will be using it today. • Messages should be sent in batches. • A feedback service must be listened to.32
Preparing to Implement Apple Push Notifications • You must create a SSL certificate and key from the provisioning portal • After this is completed the provisioning profile will need to be utilized for the application. • Lastly, you will need to install the certificate and key on the server. In this case; you will be making a pem certificate.33
How the Application Works • Registration The application calls the registerForRemoteNotificationTypes: method. The delegate implements the application:didRegisterForRemoteNotificationsWithDeviceToken: method to receive the device token. It passes the device token to its provider as a non-object, binary value. • Notification By default this just works based on the payload; for syncing you would implement this on the launch.35
Microsoft Push NotificationsWell, I am not certain if they will find the market share yetbut hey; some people need to build apps for it!
Understanding MPNS • It allows third-party application servers to send lightweight messages to their Windows Mobile applications. • Microsoft makes no guarantees about delivery or the order of messages. (See a pattern yet?) • 3 types of messages: Tile, Toast or Raw • Limitations: One push channel per app, 30 push channels per device, additional adherence in order to send messages 3K Payload, 1K Header • http://msdn.microsoft.com/en-us/library/ff402537.aspx43
Preparing to Implement MPNS • Upload a TLS certificate to Windows Marketplace The Key-Usage value of the TLS certificate must be set to include client authentication. The Root Certificate Authority (CA) of the certificate must be one of the CAs listed at: SSL Root Certificates for Windows Phone. Stays authenticated for 4 months. Set Service Name to the Common Name (CN) found in the certificates Subject value. Install the TLS certificate on your web service and enable HTTP client authentication.44
BlackBerry Push NotificationsAre these even going to be needed in another year?I keep thinking about adding them in; but I am completelyunsure if they work…
Understanding BlackBerry Push • It allows third-party application servers to send lightweight messages to their BlackBerry applications. • Allows a whopping 8K or the payload • Uses WAP PAP 2.2 as the protocol • Mileage may vary…52
Application Code • They have a “Sample” but it is deep within their Push SDK. Many of which are pre-compiled. Documentation is hard to follow and the sample isn’t exactly straight forward: • Install the SDK then go to BPSS/pushsdk-low-level/sample-push- enabled-app/ and unzip sample-push-enabled-app-188.8.131.52-sources.jar Since I do not touch blackberry; or have the desire, I would ensure the library works for people that want it; just help me test it!54
Preparing to Implement • You need to register with BlackBerry and have all of the application details ready to go: https://www.blackberry.com/profile/?eventId=8121 • Download the PHP library: Updated to be OO; non-tested and a bit sloppy: https://github.com/mwillbanks/BlackBerryPush Original source: http://bit.ly/nfbHXp55
Implementing BB Push w/ PHP • Be aware… this code is highly alpha – never been tested. • If you do use BlackBerry push messages; please connect with me so that I can include this in the Zend_Mobile_Push component.56
Next steps • ZF 2 If / when this library makes it into ZF 1.x; I will be working on it for 2.x. My first focus is ensuring it’s successful addition to ZF 1.x. I have some code for the 2.x version but some minor refactoring is due to fit the new model. • BlackBerry Who knows where they will end up. All I know is that developing for it seems painful and the documentation is certainly not what I would like to see. There is a large need for a quality implementation but at the same point developers are not highly interested in their platform.58
Resources • Main Sites Apple Push Notifications: http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Con ceptual/RemoteNotificationsPG/Introduction/Introduction.html Google C2DM (Android): http://code.google.com/android/c2dm/ Microsoft Push Notifications: http://msdn.microsoft.com/en- us/library/ff402558(v=vs.92).aspx BlackBerry Push Notifications: http://us.blackberry.com/developers/platform/pushapi.jsp • Push Clients: Zend_Mobile: https://github.com/mwillbanks/Zend_Mobile BlackBerry: https://github.com/mwillbanks/BlackBerryPush • Might be broken but at least better than what I found anywhere else 59
Questions?These slides will be posted to SlideShare after the meetup. Slideshare: http://www.slideshare.net/mwillbanks Twitter: mwillbanks G+: Mike Willbanks IRC (freenode): lubs Blog: http://blog.digitalstruct.com