Guide to Using NestJS JWT
Introduction JSON Web Token (JWT) is an open standard (RFC 7519) used for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed. Advantages: No need to store sessions on the server (Stateless), easy system scalability, good support for multi-platform applications and microservices. Limitations: Difficult to revoke tokens before expiration, token size larger than session ID, and if the Secret Key is exposed, the entire system will be compromised. Detail After creating the NestJS project, create the auth.dto.ts file to define the payload information when logging in with the following content: import {IsNotEmpty, IsString} from 'class-validator' export class LoginDto { @ IsString () @ IsNotEmpty () username : string @ IsString () @ IsNotEmpty () password : string } Create the environment.service.ts file: import {Injectable} from '@nestjs/common' import {ConfigSer...