Post on 15-Apr-2017
March 2017
RESTFUL WEB API
March 2017
FARAMARZSALEHPOURBack-End Developer at ParsFiberNet
@fsalehpour
March 2017
WHAT IS WEB API?
Architecture: Client/ServerProtocol: HTTP
March 2017
WHY SHALL WE USE WEB APIS?
• Network based systems & services• Web Applications (SPA)• Mobile Apps• Integration• B2B
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USE CASE EXAMPLE
3rd PartyService
Web API
Web App
Android
iOS
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RESTRepresentational State Transfer
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REST - PROPERTIES
• Client/Server architecture• Stateless• Cacheable• Uniform Interface
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REST - RESOURCES
A resource is an object with a type, associated data, relationships to other resources, and a set
of methods that operate on it
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REST - RESOURCES
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REST - PRESENTATION
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REST - TRANSFER
HTTP: HyperText Transfer Protocol
Messages: Request/Response
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REST - TRANSFERHTTP | Request
Head
Body
Method
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REST - TRANSFERHTTP | Response
Head
Body
Status
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REST - SECURITY
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REST - IMPLEMENTATIONUNIFORM INTERFACE - URL SCHEME
Resource name car
Resource URI /cars
Resource URL https://www.example.com/cars
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REST - IMPLEMENTATIONUNIFORM INTERFACE - HTTP VERBS
Create POST
Read GET
Update PUT
Delete DELETE
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REST - IMPLEMENTATIONSECURITY
• Token based authentication• Header
Authorization: Bearer taw0ws5Kjvelc9z0RCfyfNrVWEqyFBNv3vN53HWk
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REST - IMPLEMENTATIONRESPONSE - SUCCESS
200 OK
201 CREATED
202 ACCEPTED
204 NO CONTENT
206 PARTIAL CONTENT
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REST - IMPLEMENTATIONRESPONSE - CLIENT SIDE ERROR
400 BAD REQUEST
401 UNAUTHORIZED
403 FORBIDDEN
404 NOT FOUND
405 METHOD NOT ALLOWED
406 NOT ACCEPTABLE
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REST - IMPLEMENTATIONRESPONSE - SERVER SIDE ERROR
500 INTERNAL SERVER ERROR
503 SERVICE UNAVAILABLE
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REST - IMPLEMENTATIONCREATE A NEW RESOURCE
Method POST
URL https://api.example.com/cars
Body {“brand”:”IKCO”, “model”:”Pars”}
Response 201 CREATED{“id”: 1, “brand”: “IKCO”, “model”: “Pars”}
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REST - IMPLEMENTATIONGET ALL RESOURCES
Method GET
URL https://api.example.com/cars
Response200 OK[{“id”: 1, “brand”: “IKCO”, “model”: “Pars”}, {“id”: 2, “brand”: “Saipa”, “model”: “Pride”}]
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REST - IMPLEMENTATIONGET A SPECIFIC RESOURCE
Method GET
URL https://api.example.com/cars/2
Response200 OK{“id”: 2, “brand”: “Saipa”, “model”: “Pride”}
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REST - IMPLEMENTATIONUPDATE A SPECIFIC RESOURCE
Method PUT
URL https://api.example.com/cars/2
Body {“brand”:”Saipa”, “model”:”141”}
Response 200 OK{“id”: 2, “brand”:”Saipa”, “model”:”141”}
March 2017
REST - IMPLEMENTATIONUNIFORM INTERFACE - DELETE A SPECIFIC
RESOURCE
Method DELETE
URL https://api.example.com/cars/2
Response 200 OK
March 2017
Q & A
March 2017
THANK YOU