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

• order-api

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

  The application secured endpoints can just 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 login using his/her username and password. All the requests coming from order-ui to secured endpoints in order-api have the JWT access token. This token is generated when the user or admin logins.

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

• npm
• Java 17+
• Docker
• jq

• In a terminal, make sure you are inside 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 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 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

  

• The gif below shows an admin loging in

  

• 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 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 Authorize button and then, click Close button

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

  • Provide the description of the order

    { "description": "Buy two iPhones" }
    

  • Click 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 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)"
    

  • Call again GET /api/orders, now with 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": "[email protected]", "role": "ADMIN",
      "orders": []
    }
    

• Automatic Endpoints Test

  • Open a terminal and make sure you are in 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 inform 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 springboot-react-jwt-token root folder, run the command below

  docker compose down -v
  

• In a terminal, make sure you are in 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