Cloud Function For Firebase Google Cloud Functions is Google's serverless compute solution for creating event-driven applications. It is a joint product between the Google Cloud Platform team and the Firebase team.

1. Cloud Function For Firebase
GITS Indonesia

2. Sudaryatno
Technical Lead GITS Indonesia

4. Serverless, function as service (Faas)
Adalah cloud computing code execution model dimana cloud provider dapat
memanage secara meyeluruh, menjalankan dan memberhentikan container
dari setiam function.
Dan harga yang harus dibayarkan adalah ekesuti dari function tersebut bukan
per VM, per hit API, per Jam

5. Progression Serverless

6. Vendor Severless
AWS Lamda
Firebase Function
Microsoft Azure
IBM OpenWisk

7. Price Firebase Function

8. Intro
Cloud Function adalah tempat hosting yang private dan scalable untuk Node.js
environment.
Firebase SDK sekarang sudah terintegrasi dengan Cloud Function yang dapat
meresponse dan merequest fitur lain dari Firebase

9. Key capabilities
● Integrate The Firebase Platform
● Zero maintenance
● Keep your logic private and secure

10. Implement Path
Set up Functions Write Functions Deploy & Monitor

11. Function Start
npm install -g firebase-tools

12. myproject
+- .firebaserc # Hidden file that helps you quickly switch between
| # projects with `firebase use`
+- firebase.json # Describes properties for your project
+- functions/ # Directory containing all your functions code
+- package.json # npm package file describing your Cloud Functions code
+- index.js # main source file for your Cloud Functions code
+- node_modules/ # directory where your dependencies (declared in
# package.json) are installed

13. Perform Realtime
Database sanitization
and maintenance
1. Event user melakukan write di
database realtime
2. Function membaca action dan
juga dapat membrikan logic
dari action tersebut
3. Function menulis kembali di
database realtime dengan path
yang sama atau berbeda

14. GITS CODE Perform Realtime Database sanitization and maintenance
exports.makeUppercase = functions.database.ref('/messages/{pushId}/original').onWrite(event => {
// Grab the current value of what was written to the Realtime Database.
const original = event.data.val();
console.log('Uppercasing', event.params.pushId, original);
const uppercase = original.toUpperCase();
// You must return a Promise when performing asynchronous tasks inside a Functions such as
// writing to the Firebase Realtime Database.
// Setting an "uppercase" sibling in the Realtime Database returns a Promise.
return event.data.ref.parent.child('uppercase').set(uppercase);

15. Execute intensive task in
the cloud instead of in
your app
1. Function mendapatkan trigger
dari user yang upload image
2. Function download image dan
membuat versi thumbnail
3. Function menyimpan path
thumbnail di database
4. Function upload ulang ke
firebase storage

16. GITS CODE
return mkdirp(tempLocalDir).then(() => {
// Download file from bucket.
const bucket = gcs.bucket(event.data.bucket);
return bucket.file(filePath).download({
destination: tempLocalFile
}).then(() => {
console.log('The file has been downloaded to', tempLocalFile);
// Generate a thumbnail using ImageMagick.
return spawn('convert', [tempLocalFile, '-thumbnail', `${THUMB_MAX_WIDTH}x${THUMB_MAX_HEIGHT}>`, tempLocalThumbFile]).then(() => {
console.log('Thumbnail created at', tempLocalThumbFile);
// Uploading the Thumbnail.
return bucket.upload(tempLocalThumbFile, {
destination: thumbFilePath
}).then(() => {
console.log('Thumbnail uploaded to Storage at', thumbFilePath);
});
});
});
});

17. Integrate with third-party
service and APIs
1. Function dapat triger dari
webhook github
2. Function memanggil api
postMessage

18. GITS CODE
exports.githubWebhook = functions.https.onRequest((req, res) => {
const cipher = 'sha1';
const signature = req.headers['x-hub-signature'];
// TODO: Configure the `github.secret` Google Cloud environment variables.
const hmac = crypto.createHmac(cipher, functions.config().github.secret)
// The JSON body is automatically parsed by Cloud Functions so we re-stringify it.
.update(JSON.stringify(req.body, null, 0))
.digest('hex');
const expectedSignature = `${cipher}=${hmac}`;
// Check that the body of the request has been signed with the GitHub Secret.
if (signature === expectedSignature) {
postToSlack(req.body.compare, req.body.commits.length, req.body.repository).then(() => {
res.end();
}).catch(error => {
console.error(error);
res.status(500).send('Something went wrong while posting the message to Slack.');
});
} else {
console.error('x-hub-signature', signature, 'did not match', expectedSignature);
res.status(403).send('Your x-hub-signature's bad and you should feel bad!');
}});

19. Full Sample
https://github.com/firebase/functions-
samples

20. Google Cloud Functions is Google's serverless compute
solution for creating event-driven applications. It is a joint
product between the Google Cloud Platform team and the
Firebase team.

21. Thanks!
Contact us:
Sudaryatno
GITS Indonesia
Bandung, Mars Barat 1 no 9
yatnosudar@gits.co.id
www.gits.id