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API Design
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azisaka
March 04, 2013
Technology
7
180
API Design
A keynote made for Papaya Ventures explaining the main points when developing an API.
azisaka
March 04, 2013
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Transcript
por que você deveria se importar? API design
Como enviar dados para a nuvem?
API Application Programming Interface Fácil de usar Rápida Leve JSON
Construindo uma API
Representational State Transfer REST
Arquitetura DISTRIBUÍDA
Representação de Entidades /posts/1.json /posts/1/comments.json /posts/1/likes.json
HTTP METHOD ACTION VERBO SUBSTANTIVO GET DELETE POST PUT /posts
/posts /posts/1 /posts/1
USE Substantivos ao inves de verbos
verbos criam uma API prolixa GET /listarPosts.json POST /criarPost.json GET
/visualizarPost.json?id=1
Se aproveite dos HTTP methods GET /posts.json POST /posts.json GET
/posts/1.json PUT /posts/1.json DELETE /posts/1.json
Sempre plural, nunca singular
ENdpoints no plural são intuitivos GET /posts GET /posts/1 PUT
/posts/1 POST /posts
Substantivos concretos, nunca abstratos
Endpoints devem ter significado GET /items GET /products GET /users
GET /assets Ruim Bom
RELACIONE RECURSOS DE FORMA SIMPLES
Endpoints auto-explicativos Foto Likes POST /photos/1/likes Categoria Estabelecimentos GET /categories/restaurant/venues
Coloque a complexidade DEPOIS da “?”
filtros e buscas GET /posts?status=draft GET /posts/1/comments?user_id=1 GET /posts?q=something
Resultados devem ser paginados
Indiquem onde o resultado está GET /posts { “posts”: [
{ “id”: 1, title: “Post #1” }, { “id”: 2, title: “Post #2” } ], “page”: 1, “total”: 10, “perPage”: 2 } GET /posts?page=2&perPage=1 { “posts”: [ { “id”: 3, title: “Post #3” }, ], “page”: 2, “total”: 10, “perPage”: 1 }
Retorne dados parcialmente
Reduza o payload GET /posts/1 { “post”: { “id”: 1,
“title”: “Post #1”, “body”: “Post’s body”, “tags”: [“api”, “web”, “http”], “category”: { “name”: “Development” } } } GET /posts/1?fields=id,title { “post”: { “id”: 1, “title”: “Post #1” } }
Retorne erros com significado
Seja claro! POST /posts { “status”: 400, “message”: “O título
não pode ficar em branco” }
Versione sua API
E mantenha ao menos 1 versão GET /v1/posts/1 GET /v2/posts/1
{ “post”: { “id”: 1, “title”: “Post #1”, “content”: “Post’s body” } } } { “post”: { “id”: 1, “title”: “Post #1”, “body”: “Post’s body” } } }
Use um subdomínio
api.seuprojeto.com Escalabilidade independente Controle de cache e CDN independente Organização
Wrap up
APIs podem fazer a diferença durante o desenvolvimento Cuidado com
o Design
A mesma API pode ser core de aplicativos iPhone, Android,
Web e Desktop Colha os frutos
Outros aplicativos podem aumentar o valor do seu produto expandindo
o seu uso Aumente seu evaluation
O caso “Instragram”
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Obrigado :)