Apresentação sobre RESTFul apresentada na Sexta do Conhecimento promovida pelo ITEC

1. RESTFUL WEBSERVICES
Fernando Oliveira

2. Web
Services

3. Internet
Web Service
Database
File System

4. REpresentational State Transfer
REST
https://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm
"architectural style for distributed
hypermedia systems” (Roy Thomas Fielding)

5. Implementation in
accordance with
REST

6. REST Constraints

7. Client-Server
1

9. Stateless
2

10. Isolated
Requests
All requests must to have all information needed to
process the requested operation

11. Cache
3

12. Uniform Interfaces
4

13. “Any information that can be named can be a resource:
a document or image, a temporal service, a collection
of other resources, a non-virtual object (e.g. a person),
and so on. A resource is a conceptual mapping to a set
of entities, not the entity that corresponds to the
mapping at any particular point in time.
Roy Fielding
https://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm

14. GET | POST
http://www.example.com/customers
GET | PUT | DELETE
http://www.example.com/customers/33245
Recursos

15. ➤ Removes a Resource
➤ Updates an existing Resource
➤ Creates a new Resource
➤ Retrieves a Resource
➤ CacheableGET
POST
PUT
DELETE

17. HATEOASHATEOAS - Hipermedia As The Engine Of Application State
GET /items?q=macbook+air
{
“results”: [
{
“_links”: [
{ “rel”: “self”, “uri”: “/items/123“ },
{ “rel”: “bids”, “uri”: “/items/123/bids“ },
{ “rel”: “win”, “uri”: “/items/123/bids?q=win“ }
],
“name”: “Macbook Air 2010 new”,
“price”: “2300”
}
]
}

18. Layered System
5

20. Code on Demand
(Optional)6

21. The Optional code
on demand
constraint allows
clients to request
and execute code
from servers.
This, in turn,
allows the server
to deploy new
features to clients.

22. EXEMPLOS