Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Web Push Notifications
Search
Olga
June 22, 2017
Programming
1
290
Web Push Notifications
Slides for my talk at Fluent Conf, San Jose, June 22, 2017
Olga
June 22, 2017
Tweet
Share
More Decks by Olga
See All by Olga
Visual Feature Engineering for Machine Learning with React
olgapetrova
0
240
Introduction to ExtReact, ExtAngular and ExtWebComponents
olgapetrova
0
68
Visual Feature Engineering for ML with React and TensorFlow.js
olgapetrova
0
69
How to Re-Architect a JavaScript Class System
olgapetrova
0
120
How to add D3.js visualization to your Ext JS application
olgapetrova
1
580
Turbo-charged Data Analysis and Visualization using Ext JS 6.2
olgapetrova
3
96
ExtJS 6: one framework for all devices
olgapetrova
1
780
Other Decks in Programming
See All in Programming
PHPカンファレンス関西2025 基調講演
sugimotokei
6
1k
リッチエディターを安全に開発・運用するために
unachang113
1
320
11年かかって やっとVibe Codingに 時代が追いつきましたね
yimajo
0
220
SQLアンチパターン第2版 データベースプログラミングで陥りがちな失敗とその対策 / Intro to SQL Antipatterns 2nd
twada
PRO
35
11k
Strands Agents で実現する名刺解析アーキテクチャ
omiya0555
1
110
Streamlitで実現できるようになったこと、実現してくれたこと
ayumu_yamaguchi
2
250
decksh - a little language for decks
ajstarks
4
21k
#QiitaBash TDDで(自分の)開発がどう変わったか
ryosukedtomita
1
300
脱Riverpod?fqueryで考える、TanStack Queryライクなアーキテクチャの可能性
ostk0069
0
580
[Codecon - 2025] Como não odiar seus testes
camilacampos
0
100
SwiftでMCPサーバーを作ろう!
giginet
PRO
2
210
202507_ADKで始めるエージェント開発の基本 〜デモを通じて紹介〜(奥田りさ)The Basics of Agent Development with ADK — A Demo-Focused Introduction
risatube
PRO
6
1.3k
Featured
See All Featured
We Have a Design System, Now What?
morganepeng
53
7.7k
Large-scale JavaScript Application Architecture
addyosmani
512
110k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
7
770
[RailsConf 2023] Rails as a piece of cake
palkan
56
5.7k
Making the Leap to Tech Lead
cromwellryan
134
9.4k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
29
9.6k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
35
2.5k
A Tale of Four Properties
chriscoyier
160
23k
Embracing the Ebb and Flow
colly
86
4.8k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
194
16k
Being A Developer After 40
akosma
90
590k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
31
1.3k
Transcript
None
Web Push Notifications Olga Petrova Software Engineer @ Sencha
What You Will Learn • Definition & Concept • Implementation
• Framework API • State of Specifications & Browser support
Definition & Concept
Web Push Notifications Gives web applications the ability to receive
messages pushed to them from a server at any time
Target Engage users with urgent and relevant notifications and motivate
them to return to the application
Commercial Value • Increase user engagement • Increase web app
value • Replace a native app with a web app
Web Push + page/browser is inactive/closed - encryption - message
size/count limit - requires display of a notification - active web page + no encryption + no message size/count limit + no notification display required Web Sockets + real-time communication vs
Implementation
5 Players WebApp Service Worker Browser Push Server App Server
Web Push Message Encryption for Web Push Voluntary Application Server
Identification for Web Push Push API Specifications Notification API WebApp Service Worker Browser Push Server App Server
Round 1: Service Worker Registration WebApp Service Worker Browser Push
Server App Server Register ServiceWorkerRegistration Page Load
Round 1: ServiceWorker Registration if ('serviceWorker' in navigator) { if
('PushManager' in window) { navigator.serviceWorker.register('ServiceWorker.js').then(function(registration) { //state initializing }); .catch(function() { //error handling }); } else { //error handling } } else { //error handling } WebApp
Round 2: Subscription WebApp Service Worker Browser Push Server App
Server Subscribe PushSubscription Subscribe push subscription save PushSubscription User is ready to subscribe
Round 2: Subscription navigator.serviceWorker.ready.then(function(registration) { registration.pushManager.subscribe({ userVisibleOnly: true, applicationServerKey: urlBase64ToUint8Array('...')
}) .then(function(subscription) { // The subscription was successful savePushSubscription(subscription); }) .catch(function(e) { //error handling }); }); WebApp
Round 2: Permission Request WebApp Notification.requestPermission().then(function(result) { if (result!== 'granted')
{ //handle permissions deny } });
Round 2: Subscription reg.pushManagerpushManager.subscribe({ userVisibleOnly: true, applicationServerKey: new Uint8Array([...]) });
WebApp
Round 2: Subscription Object interface PushSubscription { readonly attribute endpoint;
// "https://{push_server_url}/{user_identifier}", function getKey(); //auth - authentication secret //p256dh - key for encrypting messages }; WebApp
Round 3: Push Message WebApp Service Worker Browser Push Server
App Server push message push message push message Something urgent and relevant happened
Round 3: Push Message POST /{user_identifier} HTTP/1.1 Host: {push_server_url} TTL:
15 Content-Type: text/plain;charset=utf8 Content-Length: 36 {encrypted_message} AppServer
Round 3: Additional Headers POST /{user_identifier} HTTP/1.1 Host: {push_server_url} Content-Type:
text/plain;charset=utf8 Content-Length: 36 Prefer: respond-async TTL: 15 Urgency: high Topic: upd {encrypted_message} AppServer
Round 3: Message Encryption POST /{user_identifier} HTTP/1.1 Host: {push_server_url} Content-Type:
text/plain;charset=utf8 Content-Length: 36 Prefer: respond-async TTL: 15 Urgency: high Topic: upd {encrypted_message} AppServer
Round 3: Encryption Library https://github.com/web-push-libs/web-push AppServer
Round 3: Voluntary Identification AppServer POST /{user_identifier} HTTP/1.1 Host: {push_server_url}
TTL: 15 Content-Length: 136 Authorization: Bearer eyJ0eXAi... Crypto-Key: p256ecdsa=BA1Hxzy... {encrypted_message}
Round 3: Voluntary Identification JWT = { "aud": "https://{push_server_url}", "exp":
1453341205, "sub": "{application_server_email}" } AppServer
Round 3: Push Message self.addEventListener('push', function(event) { var data =
event.data.json(); event.waitUntil(self.registration.showNotification(data.title, { body: data.body, icon: data.icon, tag: data.tag })); }); ServiceWorker
Round 3: Handle Notification self.addEventListener('notificationclick', function(event) { event.notification.close(); event.waitUntil(clients.openWindow('http://mywebsite.com')); });
ServiceWorker
Round 3: Notifications with Actions self.registration.showNotification(data.title, { body: data.body, actions:
[ { action: 'ok', title: 'Yes' }, { action: 'decline', title: 'No' } ] }); … self.addEventListener('notificationclick', function(event) { if (event.action == 'ok') { // do something } }); ServiceWorker
Round 3: Notification Close self.addEventListener('notificationclose', function(event) { //do something });
ServiceWorker
Round 3: Handle Notification if (focused) { clients.forEach(function(client){ client.postMessage({ message:
data.message }); }); } else { return self.registration.showNotification(data.title, { body: data.message }); } ServiceWorker
Round 4: Unsubscription WebApp Service Worker Browser Push Server App
Server unsubscribe OK unsubscribe OK remove PushSubscription User wants to unsubscribe
Round 4: Unsubscription registration.pushManager.getSubscription().then(function(subscription) { if (subscription) { return subscription.unsubscribe().then(function(successful)
{ removePushSubscription(subscription); }).catch(function(e) { //error handling }); } }) .catch(function(error) { //error handling }) WebApp
Additional Round: Subscription Expiration WebApp Service Worker Browser Push Server
App Server Subscription is about to expire
Additional Round: Subscription Expiration self.addEventListener('pushsubscriptionchange', function(registration, newSubscription, oldSubscription) { removePushSubscription(oldSubscription);
savePushSubscription(newSubscription); }); ServiceWorker
Framework API
Framework API • PushNotification singleton • Methods: • .subscribe(message, applicationServerKey):
Promise • .unsubscribe(): Promise • Events: • beforeNotificationShow(notification, data) • beforeNotificationClose • afterNotificationClose • subscriptionExpired(oldSubscription, newSubscription)
State of Specifications & Browser Support
State of Specifications Specification State Push API Working draft Notification
API Living standard HTTP Web Push Proposed standard Push Message Encryption protocol Internet-draft VAPID protocol Internet-draft
Browser Support Browser Desktop Mobile Chrome Yes Yes Firefox Yes
Yes Edge Beta Beta Safari Yes No Opera Yes Yes IE No No
Next Steps Using Web Push Notifications will push browser vendors
to implement this feature. Try it in your apps. Ask me questions: I’ll be at the Sencha Booth #913 Contact me: @tyoushe