JWT and Passport JWT Strategy for Your NestJS REST API Project | by Panos Zafeiropoulos | Mar, 2022

Photograph by Blake Guidry on Unsplash
  • First, we are going to use JSON Internet Tokens for customers’ authentication
  • then will proceed to guard our routes (primary endpoints) utilizing the Passport bundle and apply the JWT Technique.
  • The repo (as within the NestJS Documentation) already contains each the AuthModule and the UsersModule respectively, in addition to their Controller and Service courses.
  • As a substitute of utilizing the UsersService for the fundamental CRUD operations, the repo makes use of a separate solo @injectable class, the DbRepo. It serves each the AuthService and the UsersService. [You can read how to use a solo @injectable class as a singleton Provider in my other post]
  • The DbRepo obtains some customers in an array who’ve been pre-set within the UserDB class.
  • class-validator and class-transformer packages are put in. DTOs and entities are outlined within the src/dataObjects folder, and they’re embellished accordingly. [see more at in post]
  • The repo makes use of externally outlined variables, so the @nestjs/config bundle is already put in, and it’s declared globally in AppModule. The exterior variables are outlined within the src/config/.env.dev file. [see more in my post]
  • Additionally, the repo makes use of the Joi schema validation instrument (which can also be is being utilized in NestJS Documentation for object schema validation). Furthermore, a JSON object schema validator has been outlined and embellished (utilizing the suitable Joi property decorators) within the src/config/config.schema.ts file. It’s getting used for the externally outlined variables within the src/config/.env.dev file.
  • The repo has outlined and makes use of (by way of AuthController and UsersController) the next endpoints
  • auth/signup
    auth/signin
    customers/
    customers?
    customers/:id/
git clone https://github.com/zzpzaf/nest-external-config-env.git
cd nest-external-config-env
npm i
npm run begin:dev
npm i @nestjs/jwt

The JwtModule

The JwtService

JWT Payload

Create and return a JWT

Validation by way of a JWT

Set up

npm i passport @nestjs/passport passport-jwt
npm i --save-dev @sorts/passport-jwt

Implementation

PassportModule.register( defaultStrategy: 'jwt' ),

The constructor — Name the father or mother: tremendous()

constructor()tremendous(param1: value1, param2: value2)

Quick intro to Guards mechanism in Nest.js

  1. Shield a whole Controller Route.
  2. Shield particular handler (in a Controller)
@UseGuards(AuthGuard())

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