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Next.js 15 Fullstack (App Router + Server Actions) · Lesson

JWT Strategy Implementation

Integrate JSON Web Tokens (JWT) for stateless authentication, covering token generation and verification.

What is a JSON Web Token (JWT)?

Welcome! In this lesson, we'll dive into JSON Web Tokens (JWTs), a popular method for securing APIs.

  • JWTs are compact, URL-safe means of representing claims to be transferred between two parties.
  • They are often used for stateless authentication, meaning the server doesn't need to store session information.
  • This makes APIs more scalable and easier to manage, especially in distributed systems.

JWT's Three Main Parts

A JWT is essentially a long string, but it's structured into three distinct parts, separated by dots (.):

  1. Header: Contains metadata about the token itself (e.g., type of token, signing algorithm).
  2. Payload: Contains the actual claims or data about the user and additional properties.
  3. Signature: Used to verify the token's integrity and authenticity.

Each part is Base64Url-encoded.

All lessons in this course

  1. Integrating NextAuth.js
  2. JWT Strategy Implementation
  3. Protecting Routes & Data
  4. Guards and Roles
  5. Custom Auth Strategies
  6. Passport.js Integration
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