The goal of this project is to implement an application called order-app to manage orders. For it, we will implement a back-end Spring Boot application called order-api and a font-end React application called order-ui. Besides, we will use JWT Authentication to secure both applications.

On ivangfr.github.io, I have compiled my Proof-of-Concepts (PoCs) and articles. You can easily search for the technology you are interested in by using the filter. Who knows, perhaps I have already implemented a PoC or written an article about what you are looking for.

• [Medium] Implementing A Full Stack Web App Using Spring-Boot and React
• [Medium] Implementing Social Login in a Spring Boot and React App
• [Medium] Building a Web Chat with Social Login using Spring Boot: Introduction
• [Medium] Building a Single Spring Boot App with Keycloak or Okta as IdP: Introduction

project-diagram

• order-api

  Spring Boot Web Java backend application that exposes a Rest API to create, retrieve, and delete orders. If a user has the ADMIN role, he/she can also retrieve information of other users or delete them.

  The application's secured endpoints can only be accessed if a valid JWT access token is provided.

  order-api stores its data in Postgres database.

  order-api has the following endpoints:

  Endpoint	Secured	Roles
  POST /auth/authenticate -d {"username","password"}	No
  POST /auth/signup -d {"username","password","name","email"}	No
  GET /public/numberOfUsers	No
  GET /public/numberOfOrders	No
  GET /api/users/me	Yes	ADMIN, USER
  GET /api/users	Yes	ADMIN
  GET /api/users/{username}	Yes	ADMIN
  DELETE /api/users/{username}	Yes	ADMIN
  GET /api/orders [?text]	Yes	ADMIN
  POST /api/orders -d {"description"}	Yes	ADMIN, USER
  DELETE /api/orders/{id}	Yes	ADMIN

• order-ui

  React frontend application where a user with role USER can create an order and retrieve a specific order. On the other hand, a user with role ADMIN as access to all secured endpoints.

  In order to access the application, a user or admin must log in using his/her username and password. All the requests coming from order-ui to secured endpoints in order-api include the JWT access token. This token is generated when the user or admin logs in.

  order-ui uses Semantic UI React as a CSS-styled framework.

• npm
• Java 21 or higher;
• A containerization tool (e.g., Docker, Podman, etc.)
• jq

• In a terminal, make sure you are inside the springboot-react-jwt-token root folder;

• Run the following command to start Docker Compose containers:

  docker compose up -d

• order-api

  • Open a terminal and navigate to the springboot-react-jwt-token/order-api folder;

  • Run the following Maven command to start the application:

    ./mvnw clean spring-boot:run

• order-ui

  • Open another terminal and navigate to the springboot-react-jwt-token/order-ui folder;

  • Run the command below if you are running the application for the first time:

    npm install

  • Run the npm command below to start the application:

    npm start

Note: the credentials shown in the table are the ones already pre-defined. You can signup new users.

• The gif below shows a user loging in:

  user-login

• The gif below shows an admin loging in:

  admin-login

• Manual Endpoints Test using Swagger

  • Open a browser and access http://localhost:8080/swagger-ui.html. All endpoints with the lock sign are secured. In order to access them, you need a valid JWT access token;

  • Click POST /auth/authenticate and then, click Try it out button;

  • Provide the user credentials username and password:

    { "password": "user", "username": "user" }

  • Click the Execute button. It should return something like:

    Code: 200
    { "accessToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9..." }
    

    Note 1: You can use the admin credentials to access more secured endpoints.

    Note 2: The token will expire in 10 minutes.

  • Copy the accessToken value (without the double quotes);

  • Click the Authorize button at the top of the page;

  • In Value input field, paste the copied token;

  • Click the Authorize button and then, click the Close button;

  • To create an order, click POST /api/orders and then, click the Try it out button;

  • Provide the description of the order:

    { "description": "Buy two iPhones" }

  • Click the Execute button. It should return something like:

    Code: 200
    {
     "id": "718c9f40-5c06-4571-bc3e-3f888c52eff2",
     "description": "Buy two iPhones",
     "user": { "username": "user" },
     "createdAt": "..."
    }
    

• Manual Endpoints Test using curl

  • Open a terminal;

  • Call GET /public/numberOfUsers:

    curl -i localhost:8080/public/numberOfUsers

    It should return:

    HTTP/1.1 200
    2
    

  • Call GET /api/orders without JWT access token:

    curl -i localhost:8080/api/orders

    As for this endpoint a valid JWT access token is required, it should return:

    HTTP/1.1 401
    

  • Call POST /auth/authenticate to get the admin JWT access token:

    ADMIN_ACCESS_TOKEN="$(curl -s -X POST http://localhost:8080/auth/authenticate \
     -H 'Content-Type: application/json' \
     -d '{"username": "admin", "password": "admin"}' | jq -r .accessToken)"
    echo $ADMIN_ACCESS_TOKEN

  • Call GET /api/orders again, now with the admin JWT access token:

    curl -i -H "Authorization: Bearer $ADMIN_ACCESS_TOKEN" localhost:8080/api/orders

    It should return an empty array or an array with orders:

    HTTP/1.1 200
    [ ... ]
    

  • Call GET /api/users/me to get more information about the admin:

    curl -i -H "Authorization: Bearer $ADMIN_ACCESS_TOKEN" localhost:8080/api/users/me

    It should return:

    HTTP/1.1 200
    {
     "id": 1, "username": "admin", "name": "Admin", "email": "admin@mycompany.com", "role": "ADMIN",
     "orders": []
    }
    

• Automatic Endpoints Test

  • Open a terminal and make sure you are in the springboot-react-jwt-token root folder;

  • Run the following script:

    ./order-api/test-endpoints.sh

    It should return something like the output below, where it shows the http code for different requests:

    POST auth/authenticate
    ======================
    admin access token
    ------------------
    eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJleHAiOjE1ODY2MjM1MjksImlhdCI6MTU4Nj..._ha2pM4LSSG3_d4exgA
    user access token
    -----------------
    eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJleHAiOjE1ODY2MjM1MjksImlhdCIyOSwian...Y3z9uwhuW_nwaGX3cc5A
    POST auth/signup
    ================
    user2 access token
    ------------------
    eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJleHAiOjE1ODY2MjM1MjksImanRpIjoiYTMw...KvhQbsMGAlFov1Q480qg
    Authorization
    =============
     Endpoints | without token | user token | admin token |
    ------------------------- + ------------- + ----------- + ------------ |
     GET public/numberOfUsers | 200 | 200 | 200 |
    GET public/numberOfOrders | 200 | 200 | 200 |
    ......................... + ............. + ........... + ............ |
     GET /api/users/me | 401 | 200 | 200 |
     GET /api/users | 401 | 403 | 200 |
     GET /api/users/user2 | 401 | 403 | 200 |
     DELETE /api/users/user2 | 401 | 403 | 200 |
    ......................... + ............. + ........... + ............ |
     GET /api/orders | 401 | 403 | 200 |
     POST /api/orders | 401 | 201 | 201 |
     DELETE /api/orders/{id} | 401 | 403 | 200 |
    ------------------------------------------------------------------------
     [200] Success - [201] Created - [401] Unauthorized - [403] Forbidden
    

• Postgres

  docker exec -it postgres psql -U postgres -d orderdb
  \dt

• jwt.io

  With jwt.io, you can input the JWT token, and the online tool decodes the token, showing its header and payload.

• To stop order-api and order-ui, go to the terminals where they are running and press Ctrl+C;

• To stop and remove Docker Compose containers, network, and volumes, go to a terminal and, inside the springboot-react-jwt-token root folder, run the command below:

  docker compose down -v

• In a terminal, make sure you are in the springboot-react-jwt-token/order-ui folder;

• Run the following commands:

  npm upgrade
  npm i -g npm-check-updates
  ncu -u
  npm install

• https://www.callicoder.com/spring-boot-security-oauth2-social-login-part-2/#jwt-token-provider-authentication-filter-authentication-error-handler-and-userprincipal
• https://bezkoder.com/spring-boot-jwt-authentication/
• https://dev.to/keysh/spring-security-with-jwt-3j76