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Introduction to Firebase
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Igor Flysta
August 19, 2015
Programming
1
95
Introduction to Firebase
Presentation of Firebase - realtime No-SQL database and hosting solution for mobile app.
Igor Flysta
August 19, 2015
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Transcript
Introduction to
Realtime Backend for your App
None
The Full Stack Creating an app requires managing complex infrastructure.
But the full stack is never that simple
… and neither is the client side Clients: • Web
• iOS • Android
… the truth is The users don’t care about your
backend
The User Expects • Speed • Offline • Multi-platform •
Simple Autentification
Firebase Backend
And forget the server Firebase apps can run on client-side
code only
REALTIME DATABASE • NoSQL JSON data-store • Cross-platform client-side SDKs
• Offline out-of-the-box • Auto-scaling • RESTful API
None
REALTIME DATA Whenever data is updated in Firebase, it sends
the update down to every listening client
None
Cross-platform
Storing Data Firebase ref = new Firebase(“https://<your-firebase-app>.firebaseio.com/message”); ref.setValue(“All the things”);
Storing Data { “location”: { “city”: “Ternopil”, “country”: “Ukraine” }
}
Sync Data Firebase ref = new Firebase (“https://<your-firebase-app>.firebaseio.com/message”); ref.addValueEventListener(new ValueEventListener()
{ @Override public void onDataChange(DataSnapshop snapshot) { System.out.println(snapshot.getValue()); } @Override public void onCancelled(FirebaseError error) { } });
{ "messages": { "message1": { "text": "Hello, world", "country": "USA"
}, "message2": { "text": "Bonjour monde", "country": "France" }, "message3": { "text": "Hello, world", "country": "England" }, "message4": { "text": "你好世界", "country": "China" }, "message5": { "text": "γειά σου κόσμος", "country": "Greece" }, ... } }
Offline
Intermittent Offline What happens when you go through a tunnel?
Firebase clients store a local cache of your data. When the user goes offline, the app still works as expected with the local cache.
Extended Offline What happens when you go on a flight?
On mobile, Firebase persists data to a local store. The app will continue to work even across app restarts.
One Line Of Code Firebase.getDefaultConfig().setPersistenceEnabled(true);
Autentification • Email & Password • Google • Twitter •
Facebook • Github • Anonymous • Custom
Autentification ref.authWithOAuthToken("google", "<OAuth Token>", new Firebase. AuthResultHandler() { @Override public
void onAuthenticated(AuthData authData) { // the Google user is now authenticated with your Firebase app } @Override public void onAuthenticationError(FirebaseError firebaseError) { // there was an error } });
Security • Declarative rules language • JavaScript-like syntax • Executed
server-side • Authorization • Schema validation
Security By default everyone can write and read { "rules":
{ ".read": true, ".write": true, } }
Security Everyone can read, but no one can write {
"rules": { ".read": true, ".write": false, } }
Security Secure specific parts of your Firebase { "rules": {
".read": true, "message": { ".write": false } } }
Security Special variables to power autentification { "rules": { ".read":
true, "message": { ".write": "auth !== null", ".validate": "newData.isString() && newData.val().length < 100" } } }
User-based Security Use $wildcards as route parameters { "rules": {
".read": false, ".write": false, "users": { "$userid": { ".read": "true", ".write": "auth.uid === $userid" } } } }
Hosting • Free static asset hosting • SSL certificate •
Global CDN • Single command deploys • One-click rollbacks • Custom domains
Hosting Demo
And More ... • Angular, React, Ember, Backbone bindings •
GeoFire (realtime geolocation) • Firepad (realtime text editing) • Open Data Sets • More coming soon...
Let’s Code
Thank You!