The document provides an overview of web push notifications, discussing the advantages such as timely access and increased visitors, as well as essential components like service workers and web app manifests. It includes technical details on service worker functionality, potential use cases, and examples of notification payloads, along with best practices for implementing push notifications in applications. The document also covers the rpush service for Ruby, highlighting its features for sending notifications and integration within projects.

1. Web Push Notification
Yulia Oletskaya / Konstantin Reido

2. Web
Push
Notification?

3. Advantages
Timely and relevant
Easy to access
Go straight to the details
Full control
● More visitors

4. Google Chrome

5. What is Web
App Manifest?
JSON file that intended to be a
centralized place to put
metadata associated with a web
application
This includes, but is not limited to:
the web application's name
links to icons
the preferred URL to open when a
user launches the web
application
a default orientation for web
application
display mode for the application
(e.g., in fullscreen)

7. Google Developers Console

8. What is Service
Worker?
A service worker is a script that is
run by browser in the background,
separate from a web page, opening
the door to features which don't
need a web page or user
interaction.

9. What is Service Worker?
It's a JavaScript Worker, so it can't access the DOM directly. Instead, a service worker can communicate with
the pages by postMessage interface.
HTTPS is Needed.
Service worker is a programmable network proxy, that allows to control how network requests from web
page are handled.
It will be terminated when not in use, and restarted when it's next needed.
Service workers make extensive use of promises.
Note: localStorage works in a similar way to service worker’s cache, but it is synchronous, so not allowed in
service workers.

10. Service Worker Use Cases
Background data synchronization
Prefetching and/or caching data for later use
Code syntax highlighting or other real-time text formatting
Hooks for background services
Spell checker
Analyzing video or audio data
Background I/O or polling of webservices
Processing large arrays or humungous JSON responses

11. Register a Service Worker

12. Service Worker Initial State

13. Subscribe a Service Worker

14. Unsubscribe a Service Worker

15. Send Out Push Notifications

16. Service Worker Example

17. Quick Flow Scheme

18. Safari

19. Local vs Web Push Notifications

20. TLS/SSL
Asynchronous binary interface over TCP socket:
gateway.push.apple.com, port 2195
gateway.sandbox.push.apple.com, port 2195
Feedback Service
feedback.push.apple.com, port 2196
feedback.sandbox.push.apple.com, port 2196

23. Notification payload
{
"aps": {
"alert": {
"title": "Flight A998 Now Boarding",
"body": "Boarding has begun for Flight A998.",
"action": "View"
},
"url-args": ["boarding", "A998"]
}
}

26. ● API
● Push Package

29. {
"websiteName": "Bay Airlines",
"websitePushID": "web.com.domain",
"allowedDomains": ["http://domain.com"],
"urlFormatString": "http://domain.com/%@/?flight=%@",
"authenticationToken": "19f8d7a6e9fb8a7f6d9330dabe",
"webServiceURL": "https://domain.com/push"
}

30. {
"website.json": "96838c4...d7760fa4043a8",
"icon.iconset/icon_16x16.png":
"865f1...93796a6341",
...
}

34. Best Practices

35. rpush
The push notification service for Ruby

36. Supported
Services
Apple Push Notification Service
Google Cloud Messaging
Amazon Device Messaging
Windows Phone Push Notification Service

37. Feature
Highlights
Use ActiveRecord, Redis or MongoDB
for storage.
Plugins. You can write your own.
Seamless integration with your projects,
including Rails.
Run as a daemon, inside a job queue, on
the command-line or embedded in
another process.

38. Feature
Highlights
Scales vertically (threading) and
horizontally (multiple processes).
Designed for uptime - new apps are
loaded automatically, signal HUP to
update running apps.
Hooks for fine-grained instrumentation
and error handling (Reflection API).
Works with MRI, JRuby and Rubinius.

39. rpush init

40. Create an App
app = Rpush::Apns::App.new
app.name = "ios_app"
app.certificate = File.read("/path/to/sandbox.pem")
app.password = "certificate password"
app.environment = "sandbox"
app.connections = 1
app.save!
app.auth_key = "..."

41. Send a Notification
n = Rpush::Apns::Notification.new
n.app = Rpush::Apns::App.find_by_name("ios_app")
n.device_token = "..." # 64-character hex string
n.alert = "hi mom!"
n.data = { foo: :bar }
n.save!
n.registration_ids = ["..."]
n.data = { message: "hi mom!" }

42. Questions?
Konstantin Reido
konstantin.reido@gmail.com
skype: konstantin.reido
Yulia Oletskaya
yulia.oletskaya@gmail.com
skype: tuwukee