What is rest. Why is it part of the Rails way?. Railsconf 2014. Javier Ramirez

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When David Heinemeier Hansson started talking about REST in 2006, little could we suspect it'd become such a central part of Rails (and of web development in general). Back then a web service meant something you coded using XML and SOAP. Those were dark times. REST changed it all. In this talk, I'll explain REST for beginners, I'll talk about why it is such an important architecture, and I'll show all the nice things Rails offers you for building a RESTful application or a RESTful API.

Software Technology

What is REST?
Why is it part of the rails way?
javier ramirez
@supercoco9

REST is an
architecture
for the web
Roy Fielding's PHD Dissertation.
2000

Client – server
Stateless
Cacheable
Multi-layered
REST constraints. HTTP basics

uniform
interface*
REST constraints. The good parts
* Convention over configuration FTW

resources
representations
metadata
uniform interface. Elements

resource:
Anything that
can be named
uniform interface

resource identifiers:
URI
uniform interface
https://api.teowaki.com/teams/teowaki-community
https://api.teowaki.com/teams/fosdem-2014
https://api.teowaki.com/users/javier
http://localhost:3000/posts/1

representations
standard formats/mime-types
uniform interface

uniform interface: representations. HTML

uniform interface: representations. JSON

GET
POST
PUT/PATCH
DELETE
uniform interface: transfer

uniform interface: transfer. GET (no id)

uniform interface: transfer. POST (no id)

uniform interface: transfer. GET (with id)

uniform interface: transfer. DELETE (with id)

HTTP as usual +
resources
representations
metadata
So REST is basically

Routes:
resources,member,collection
Controller:
respond_to,format,status,headers
Views:
show.html.erb, show.json.jbuilder
Rest in Rails

tips on routes: don't overload
GET /users/1-javier/messages
get :messages on: :member

tips on routes: don't overload
GET /users/1-javier/messages
POST /users/1-javier/messages
get :messages on: :member
post :messages on: :member

tips on routes: don't overload
GET /users/1-javier/messages
POST /users/1-javier/messages
members? No.

Naming is hard.
But very
important
tips on routes

Resources are not models
Don't expose your implementation details
tips on routes

Easier to understand
Change the internals
without breaking the
contract
Resources based on
business objects are
more resistant to
versioning
More opacity means
more security

Rest in Rails: controllers. Basic
actions

respond_to & format
Rest in Rails: controllers

huddle
200 OK
201 Created
202 Accepted
400 Bad Request
401 Unauthorized
403 Forbidden
404 Not Found
410 Gone
twitter
200 OK Success!
304 Not Modified
400 Bad Request
401 Unauthorized
403 Forbidden
404 Not Found
406 Not Acceptable
420 Enhance Your Calm
500 Internal Server Error
502 Bad Gateway
503 Service Unavailable
Useful Status
429 Too many requests
204 No Content
teowaki
200 OK Success!
201 Created
304 Not Modified
401 Unauthorized
403 Forbidden
404 Not Found
422 Unprocessable Entity
406 Not Acceptable
500 Internal Server Error

representations
Rest in Rails: views. templates

But I'm not
building an API.
Do I need REST?

API/Hypermedia Ruby gems
https://github.com/rails-api/rails-api
https://github.com/intridea/grape
https://github.com/apotonick/roar

RESTful web service/application
client-server,stateless,layered,cacheable
Resources
Resource Identifiers
Uniform interface
operations
Representations
Metadata
Hypermedia

Find related links at:
https://teowaki.com/teams/javier-community/link-categories/rest
Thank you
Javier Ramírez
@supercoco9
https://airpair.me/javier
teowaki is the place to share
links, best practices,
documentation, gossip and
lifehacks with other developers.

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