RESTful_Web_Services_Presentation (1).pptx

RESTful_Web_Services_Presentation (1).pptx

1. Introduction to RESTful Web Services Sanjay Nepali , Pradip Dhungana

2. Introduction What is a Web Service? - A method of communication between two electronic devices over a network. - Allows for interoperability between different software applications.

3. What is REST? Definition - An architectural style for designing networked applications. - REST stands for Representational State Transfer. Principles - Statelessness - Client-Server Architecture - Cachea ble - Layered System - Code on Demand (optional) - Uniform Interface

4. Principles of REST Statelessness Client-Server Architecture Cacheable

5. REST Constraints Layered System Code on Demand (optional)

6. Uniform Interface Key Concepts Resource Identification Resource Manipulation: Self-descriptive Messages: Hypermedia as the Engine of Application State (HATEOAS):

7. RESTful Web Services What are RESTful Web Services? ? Web services that adhere to the REST architectural constraints. Key Features - Use of HTTP methods: GET, POST, PUT, DELETE. - Stateless operations. - Resource-based URL structure.

8. HTTP Methods in REST GET - Retrieve information from the server. - Idempotent and safe. POST - Submit data to be processed to a specified resource. - Can create a new resource or update an existing one. PUT - Update a specified resource with the request payload. - Idempotent. DELETE - Remove the specified resource. - Idempotent.

9. RESTful Service Example Scenario: Managing a Bookstore Resource URL: /books Operations: - GET /books: Retrieve a list of books. - GET /books/{id}: Retrieve details of a specific book. - POST /books: Add a new book. - PUT /books/{id}: Update an existing book. - DELETE /books/{id}: Delete a specific book.

10. Best Practices Use Nouns for URIs Statelessness HTTP Status Codes Versioning

11. Advantages of REST Scalability Performance Flexibility

12. Tools and Technologies Tools for Developing RESTful Services - Postman: For testing APIs. - Spring boot, Express JS, Laravel, Django Technologies - JSON and XML for data interchange.

13. Conclusion - REST is a powerful architectural style for web services. - Provides a scalable, flexible, and easy-to-use way to interact with web services.