Supercharge your app with Cloud Functions for Firebase

tinyurl.com/functions-lab | @bretmcg
Cloud Functions for Firebase
Bret McGowen
@bretmcg
tinyurl.com/functions-lab

Contents
What are Cloud Functions for Firebase?
Why Cloud Functions?
Using Authentication Triggers
Using Storage Triggers
Using Database Triggers

tinyurl.com/functions-lab | @bretmcgtinyurl.com/functions-lab | @bretmcg
Automatically run backend code
in response to events triggered
by Firebase features
Cloud Functions
for Firebase

tinyurl.com/functions-lab | @bretmcg@bretmcg
Google's new serverless data center
not
^
@bretmcg

Serverless
No need to even think about servers
No upfront provisioning; scales as needed
Pay per use
Stateless / ephemeral

Cloud StorageAuthentication
Respond to Events
Realtime Database

Why Cloud Functions?
Extends and connects
Firebase features
Low maintenance Keeps your logic
private and secure

FriendlyChat
Realtime chat app

Setting Up FriendlyChat
tinyurl.com/functions-lab
or
https://codelabs.developers.google.com/
and navigate to Cloud Functions Codelab

Setting Up FriendlyChat
02.
Get the Sample Code
git clone
https://github.com/firebase/f
riendlychat
01.
Create a Firebase project and
Set up your app
From the console, create new
project called FriendlyChat and
enable Google Authentication
Install Firebase CLI and
deploy FriendlyChat
$ npm -g install firebase-tools
$ firebase deploy --except
functions
03.

Try it Out!
Send some messages with
FriendlyChat

Database Structure
messages: {
-K2ib4H77rj0LYewF7dP: {
name: "Jen",
photoUrl: "https://lh3.googleusercontent.com/-xDoJpI/photo.jpg",
text: "lol that's awesome!"
},
-K2ib5JHRbbL0NrztUfO: {
imageUrl: "gs://friendlychat-833ed.appspot.com/GJHZV...D0A.JPG",
name: "Bret",
photoUrl: "https://lh3.googleusercontent.com/-xDoJpI/photo.jpg"
},
...
}

Cloud Functions environment
- Node.js 6.11.1
- Open-source, cross-platform
JavaScript run-time environment for
executing JavaScript code server-side
- Non-blocking - commands execute in
parallel, and use callbacks to signal
completion or failure
- Debian 8 “Jessie”
- Env contains ImageMagick

// callback-hell.js
doThing1(function(a){
doThing2(a, function(b){
doThing3(b, function(c){
doThing4(c, function(d){
doThing5(d, function(e){
// ...
});
});
});
});
});

Promises

return mkdirp(tmpDir).then(() => {
return file.download({destination: tmpFile});
}).then(() => {
console.log('File downloaded to ', tmpFile);
return spawn(...); //create the thumbnail
}).then(() => {
console.log('Thumbnail: ', tmpThumbFile);
return bucket.upload(tmpFile, {destination: thu});
}).catch(function(error) {
console.log("Argghhh!", error);
});

Authentication
Triggers
Trigger a function to run when
a new user is created/deleted
Welcome!

● A user creates an account with email
account and password.
● A user signs in for the first time using
a federated identity provider.
● The developer creates an account
using the Firebase Admin SDK.
Authentication
Triggers

● .onCreate
● .onDelete
Authentication
Triggers

Let's get coding!

Storage
Triggers
Trigger a function when data
changes in a Cloud Storage
bucket
hahaha

● uploading, updating, or
deleting of files and folders
in Cloud Storage.
Storage
Triggers

● .onChange
Storage
Triggers

Machine learning as an API
Cloud
Vision API
Cloud
Translation API
Cloud
Natural Language
API
Use your own data to train models
Cloud
Speech API
Cloud Video
Intelligence
Cloud Machine
Learning Engine
TensorFlow
Two ways we can help you benefit from ML

Vision API
Complex image detection
with a simple REST request
$ npm install @google-cloud/vision
Free tier!

Database
Triggers
Trigger a function when data is
created, changed, or deleted
from the Database
lol
hahaha
lol
lol

● All writes at the database path
● First write at the database path
● All writes after the first write at the
database path
● Delete at the database path
Database
Triggers

● .onCreate
● .onWrite
● .onChange
● .onDelete
Database
Triggers

Thank you!
firebase.google.com/docs/functions
tinyurl.com/functions-videos
Bret McGowen
@bretmcg

Supercharge your app with Cloud Functions for Firebase

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