The document presents an overview of APIs, focusing on RESTful APIs and CRUD operations. It discusses the architecture, constraints, and principles of REST, alongside practical examples of API request methods and URL design principles. Additionally, it includes various references for further reading on API design and implementation.

1. Rest API and CRUD API
Presented By :-
- Anuj Patel
- Bhumi Patel
- Dharanee Patel
- Kalpit Shah
- Umang Suthar
https://htree.plus

2. What is API?
https://htree.plus

3. Types of API
- Web service APIs
● SOAP
● REST
- Functions or routines in an OS
- Object remoting APIs
● .NET
● CORBA
- Library-based APIs
- Class-based APIs (object oriented)
● Java API
https://htree.plus

4. What is RESTful API?
https://htree.plus
REpresentational State Transfer

5. What is Resource and Resource Methods?
https://htree.plus

6. - Client-Server Architecture
Separation of concerns. (UI - Data Storage)
- Statelessness
In Real Life :-
Where does Kalpit live? What is his age?
In REST :-
Where does Kalpit live? What is Kalpit’s age?
REST Architectural Constraints
https://htree.plus

7. - Cacheability
Well-managed caching partially or completely eliminates some client-server
interactions, further improving scalability and performance.
REST Architectural Constraints (Cont..)
https://htree.plus

8. - Uniform interface
● Identification of Resources
https://api.example.com/customers/12
● Resource Representations
● Self-Descriptive Messages
Content-Type: application/json
● HATEOAS
(Hypermedia As The Engine
Of Application State)
REST Architectural Constraints (Cont..)
https://htree.plus

9. - Layered system
- Code on demand (optional)
REST Architectural Constraints (Cont..)
https://htree.plus

10. CRUD and REST
CREATE
READ
UPDATE
https://htree.plus
DELETE
POST
GET
PUT
DELETE
Operations HTTP Methods

11. - users - POST request
- users/1 - GET request
- users/1 - DELETE request
- users/1 - PUT request
APIs Example
https://htree.plus
- users/create- POST request
- users/1/show- GET request
- users/1/delete - POST request
- users/1/edit- POST request
Normal CRUD API RESTful CRUD API

12. URL Design Principle
- Use nouns and NOT the verbs
- API should be /products NOT /getAllProducts
- Use Plurals
- API should be /products NOT /product
- Versioning
- API should be /v1/products or /v2/products
- Use Pagination
- /products?page=1
- Use Lowercases
- API should be /products NOT /Products

13. Untold Story of REST
https://htree.plus
GET /users
{
"parameter1": "value1",
"parameter2": "value2",
"parameter3": "value3",
"parameter4": "value4"
}
POST /users/searches OR POST /filters/users

14. References
- https://www.codecademy.com/articles/what-is-crud
- https://restfulapi.net/http-methods/
- https://www.freelancinggig.com/blog/2018/04/24/rest-vs-crud-need-know/
- https://stoplight.io/blog/crud-api-design/
- https://softwareengineering.stackexchange.com/questions/120716/difference-between-rest-and-crud
- https://www.kennethlange.com/what-are-restful-web-services/
- https://restfulapi.net/rest-architectural-constraints/
- https://medium.com/future-vision/the-principles-of-rest-6b00deac91b3
- https://en.wikipedia.org/wiki/Representational_state_transfer
- https://gist.github.com/alexserver/2fcc26f7e1ebcfc9f6d8
- https://medium.com/extend/what-is-rest-a-simple-explanation-for-beginners-part-1-introduction-b4a072f8740f
- https://medium.com/extend/what-is-rest-a-simple-explanation-for-beginners-part-2-rest-constraints-129a4b69a582
- https://www.mulesoft.com/resources/api/what-is-an-api
- https://ffeathers.wordpress.com/2014/02/16/api-types/
- https://www.redhat.com/en/topics/api/what-are-application-programming-interfaces
- https://hackernoon.com/restful-api-design-step-by-step-guide-2f2c9f9fcdbf
- https://docs.microsoft.com/en-us/azure/architecture/best-practices/api-design
https://htree.plus

15. Thank You
Any Questions ?
https://htree.plus