Realtime, feature-rich apps are here

Building those apps is hard

Firebase

A powerful platform for

building extraordinary apps

Firebase Is Your Backend

Realtime Database

NoSQL JSON data store

Cross-platform client-side SDKs

Offline out-of-the-box

Auto-scaling

RESTful API

Realtime

Whenever data is updated in Firebase,
it sends the update down to every
listening client

Cross-platform

Storing Data

            {
  "location": {
    "city": "San Francisco",
    "country": "USA"
  }
}
          

Storing Data

            var ref = new Firebase("https://ga-intro-to-firebase.firebaseio-demo.com");
ref.child("location").set({
  city: "San Francisco",
  country: "USA"
});
          

Reading Data

            {
  "location": {
    "city": "San Francisco",
    "country": "USA"
  }
}
          

Reading Data

            Firebase ref = new Firebase("https://ga-intro-to-firebase.firebaseio-demo.com");
ref.child("location").addValueEventListener(new ValueEventListener() {
  @Override
  public void onDataChange(DataSnapshot snapshot) {
    String city = (String) snapshot.child("city").getValue();
    System.out.println(city);  // "San Francisco"
  }

  @Override
  public void onCancelled(FirebaseError error) { }
});
          

Querying Data

            {
  "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" },
    ...
  }
}
          

Querying Data

            let ref = Firebase(url:"https://ga-intro-to-firebase.firebaseio-demo.com")
let messagesRef = ref.childByAppendingPath("messages");

let query = messagesRef.queryOrderedByChild("text");
query = query.queryEqualToValue("Hello, world");
query = query.queryLimitedToLast(5);

query.observeEventType(.ChildAdded, withBlock: { snapshot in
  println(snapshot.country);  // USA, England, etc.
});
          

Firebase Is Your Backend

Authentication

No server required

Anonymous

Email / password

Facebook, Twitter, Google, etc.

Custom

Authenticating Users

            var ref = new Firebase("https://ga-intro-to-firebase.firebaseio-demo.com");

// Login anonymously
ref.authAnonymously(function(error, authData) {
  console.log(authData);
});

// Login with Google
ref.authWithOAuthPopup("google", function(error, authData) {
  console.log(authData);
});
          

Detecting Auth State

            var ref = new Firebase("https://ga-intro-to-firebase.firebaseio-demo.com");

// Listen for authenticated users
ref.onAuth(function(authData) {
  if (authData) {
    console.log("User is logged in");
  } else {
    console.log("User is logged out");
  }
});
          

Firebase Is Your Backend

Security

Declarative rules language

JavaScript-like syntax

Executed server-side

Authorization

Schema validation

Securing Data

            {
  "rules": {
    "foo": {
      ".read": true,
      ".write": "!data.exists()"
    }
  }
}
          

User-based Security

            {
  "rules": {
    "users": {
      "$uid": {
        ".read": true,
        ".write": "auth.uid === $uid"
      }
    }
  }
}
          

Validating Schema

            {
  "rules": {
    // ...
    "profile": {
      ".validate": "newData.hasChildren(['id', 'name'])",
      "id": {
        ".validate": "newData.isNumber() && newData.val() > 0"
      },
      "name": {
        ".validate": "newData.isString() && newData.val().length < 50"
      },
      "$other": {
        ".validate": false
      }
    }
  }
}
          

Firebase Is Your Backend

Hosting

Free static asset hosting

SSL certificate

Global CDN

Single command deploys

One-click rollbacks

Custom domains

And More...

Angular, React, Ember, Backbone bindings

GeoFire (realtime geolocation)

Firepad (realtime text editing)

Open Data Sets

More coming soon...

Let's Code

https://ga-intro-to-firebase.firebaseapp.com

Firebase Is Your Backend

Focus On Your App

Join the 193,000+ other registered devs
who are building extraordinary apps

Stop messing with servers

Leave the hard stuff to us

Get Started Now!

https://firebase.com/docs

Jacob Wenger / @_jwngr

Core Developer / @Firebase

https://github.com/jwngr/presentations