Cookies

• An HTTP cookie is a small piece of data stored by the user's browser.
• Cookies were designed to be a reliable mechanism for websites to remember stateful information. When the user visits the website again, the cookie is automatically sent with the request.

Install cookie parser

    npm i cookie-parser
    npm i -D @types/cookie-parser

Cookies Configuration

• main.ts

   import * as cookieParser from 'cookie-parser';

  const app = await NestFactory.create(AppModule);
  app.use(cookieParser());

Request Cookies

    @Get()
    findAll(@Req() request: Request) {
        console.log(request.cookies); // or "request.cookies['token']"
    }

Response Cookies

    @Get()
    findAll(@Res({ passthrough: true }) response: Response) {
        response.cookie('key', 'value');
    }

Cookie based token validation

    @Injectable()
    export class AuthMiddleware implements NestMiddleware {

         async use(req: Request, res: Response, next: NextFunction) {
            const cookies = req.cookies;
            const token =  cookies.token;
            console.log("Token:", token);
            if (!token) {
                throw new UnauthorizedException(
                    { status: HttpStatus.UNAUTHORIZED, message:'Unauthorized'}
                    );
            }
            next();
        }
    }