The Back-End and the Request/Response Cycle
The back-end of a web application ensures functionality, dynamic content, and data handling, while its relationship with the front-end is fundamental to user interaction. Key processes include understanding the request/response cycle, HTTP methods, and how servers and databases interact. Real-life analogies and practical coding examples, especially with Node.js, illustrate these concepts effectively.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- The back-end powers the functionality of a web application.
- A server listens for requests, processes them, and sends responses.
- A database stores and retrieves information securely.
- Server-side code handles logic, validation, and operations.
- The request/response cycle connects the front-end and back-end.
- HTTP methods like GET, POST, PUT, DELETE define actions to perform.
- HTTP status codes explain how requests are handled.
- Security best practices ensure data integrity and user safety.
Key Concepts
- -- BackEnd
- Refers to everything that happens behind the scenes of a web application, responsible for data handling, storage, processing, and retrieval.
- -- Server
- A machine or program that listens for requests from clients, processes those requests, and sends appropriate responses.
- -- Database
- A system that securely stores and manages data used by applications.
- -- Request/Response Cycle
- The process by which front-end and back-end communicate, involving sending requests and receiving responses.
- -- HTTP Methods
- Actions defined by the HTTP protocol, such as GET, POST, PUT, and DELETE, that dictate how data should be sent and manipulated.
Additional Learning Materials
Supplementary resources to enhance your learning experience.