Slides for North Austin JavaScript User Group Meeting October 2016

1. Hapi vs Express
Brad Bates
North Austin JavaScript User Group
October 2016

2. About Brad
๏Started working with Node.js & Express in 2012
๏Always learning - currently guitar, Aurelia
๏Family guy

3. Express
๏http://expressjs.com
๏First Commit - Jan 3, 2010
๏The E in the MEAN stack
๏Build what you want
๏Middleware is key - cors, morgan, etc
N
o
C
ool
Logo
Typical Express REST Endpoint
app.get(‘/’,(req, res, next) =>{
res.send(‘hello world’);
});
req = Incoming HTTP Request
res = Outgoing Response
next = Callback

4. Hapi
๏http://hapijs.com
๏First Commit - Aug 20, 2012
๏Walmart Labs
๏Convention over code
๏Community - NPM, Disney, Auth0, others…
๏Larger Team Development
๏Ren & Stimpy
๏Event Lifecycle
๏Labels
๏Plugins - most of what you need, probably exists, Joi, Boom,
Swagger!

5. Hapi - Typical Rest Endpoint
server.route({
method: [‘GET’],
path: ‘/’,
config:{
handler: (request, reply){
reply(‘hello world’);
},
validate:{
<Joi Validation>
},
plugins: {
<Hapi Swagger>
}
}
});

6. Hapi - Event Lifecycle
Show
Picture
๏Events
๏Configuration

7. Hapi - Labels
import * as Hapi from ‘hapi’;
const server = new Hapi.Server();
const web = server.connection({
port: 8000,
host: ‘example.com',
labels: [‘web’]
});
const admin = server.connection({
port: 8001,
host: ‘example.com',
labels: [‘admin’]
});

8. Hapi - Plugins - Boom
https://github.com/hapijs/boom
import * as Boom from ‘boom’;
Boom.unauthorized(‘invalid password’);
generates
{
“payload”:{
“statusCode”: 401,
“error”: “Unauthorized”,
“message”: “invalid password”
}
}

9. Hapi - Plugins - Joi
https://github.com/hapijs/joi
Among the uses are to validate a HTTP payload / message body.
import * as Joi from ‘joi’;
var schema = Joi.object().keys({
username: Joi.string().alphanum().min(3).max(30).required(),
password: Joi.string().regex(/^a-zA-Z0-9]{3,30}$/),
birthyear: Joi.number().integer().min(1980).max(2013),
email: Joi.string().email()
});

10. Hapi - Plugins - Swagger
https://github.com/glennjones/hapi-swagger
One of the plugins that drew me to Hapi
Show
Docs

11. Demo
Time

12. Demo Time
๏NPM Scripts Only
๏Simple CRUD API Service
๏Postman
๏MongoDB app
๏MongoHub
๏Hapi - Docs http://localhost:5010/docs#/

13. References
๏hapijs.com
๏expressjs.com
๏https://github.com/natomis-brad/hapi-basic
๏https://github.com/natomis-brad/express-basic
๏http://freecontent.manning.com/hapi-js-in-action-diagram/
๏https://scotch.io/bar-talk/the-future-of-expressjs-and-alternatives
๏http://www.slideshare.net/BradBates9/north-austin-javascript-user-
group-meetup-october-2016
Books:
Hapi.js in Action - Harrison - Manning
https://manning.com/books/hapi-js-in-action
Developing a Hapi Edge - Nguyen, Bretol, Preul, Benson - Oreilly
http://shop.oreilly.com/product/9781939902207.do