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
790
Other Decks in Programming
See All in Programming
Platformに“ちょうどいい”責務ってどこ? 関心の熱さにあわせて考える、責務分担のプラクティス
estie
1
150
複雑なドメインに挑む.pdf
yukisakai1225
5
1.2k
Android 16 × Jetpack Composeで縦書きテキストエディタを作ろう / Vertical Text Editor with Compose on Android 16
cc4966
2
270
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
420
基礎から学ぶ大画面対応(Learning Large-Screen Support from the Ground Up)
tomoya0x00
0
4.3k
ユーザーも開発者も悩ませない TV アプリ開発 ~Compose の内部実装から学ぶフォーカス制御~
taked137
0
190
AWS発のAIエディタKiroを使ってみた
iriikeita
1
190
CJK and Unicode From a PHP Committer
youkidearitai
PRO
0
110
AI時代のUIはどこへ行く?
yusukebe
18
9.1k
さようなら Date。 ようこそTemporal! 3年間先行利用して得られた知見の共有
8beeeaaat
3
1.5k
プロパティベーステストによるUIテスト: LLMによるプロパティ定義生成でエッジケースを捉える
tetta_pdnt
0
4.3k
Azure SRE Agentで運用は楽になるのか?
kkamegawa
0
2.5k
Featured
See All Featured
What’s in a name? Adding method to the madness
productmarketing
PRO
23
3.7k
A Tale of Four Properties
chriscoyier
160
23k
Thoughts on Productivity
jonyablonski
70
4.8k
Scaling GitHub
holman
463
140k
Producing Creativity
orderedlist
PRO
347
40k
Stop Working from a Prison Cell
hatefulcrawdad
271
21k
Fireside Chat
paigeccino
39
3.6k
Building a Scalable Design System with Sketch
lauravandoore
462
33k
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
Faster Mobile Websites
deanohume
309
31k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
930
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
113
20k
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