adora-tech / spring-boot-keycloak-angular

Securing a Angular frontend and a Spring Boot backend with Keycloak and Spring Security

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This is the source code for my article on how to securing a Angular frontend and a Spring Boot backend using Keycloak.

Requirements

• Keycloak 8.0.1.Final
• Java 8
• Spring Boot 2.2.2.RELEASE
• Angular 13.2.1
• Node.js 16.13.2
• Yarn 1.22.17

Installing and Configuring Keycloak

Download the standalone server distribution from the Keycloak website, unpack it and start the server. Follow the Getting Started instructions to setup the administrator account.

There are two ways to configure the Keycloak realm for this application:

1. Import the demo-realm.json
2. Follow the Create Realm, Client and Users guide

Create Realm, Client and Users

This section is only for those who wish to manually configure the Keycloak server.

1. Create a realm

Follow the create a realm instructions and create a realm called: demo

2. Create a client

Follow steps 1- 3 of the creating and registering guide and create a new client called: my-app

In the Valid Redirect URIs field enter the two URLs: http://localhost:8081/* and http://localhost:4200/*

Note the asterisk (*) after the urls!

And in the Web Origins fields simply add a * (asterisk)

3. Create roles and assign permissions

In the Keycloak administration console create two new roles, named: user and admin Edit the admin role and enable the Composite Roles flag and choose realm-management from the Client Roles droplist. Highlight the view-users option in the Available Roles block and then click on the "Add selected" button.

4. Create the following users:

Username	Password	First Name	Last Name	Email	Roles
metalgear	password	Bob	Knight	[e-mail]	ADMIN, USER
grilldad	password	Jim	Long	[e-mail]	USER
mythbuster	password	Kate	Wilson	[e-mail]	USER
spacehunter	password	Victor	Brown	[e-mail]	USER

It is most important that you enter the username as provided in the table, because they are used in the Spring backend to link the customer orders with the user.

Start the Spring Boot Application

Open a terminal and change to the directory where the code was checked out. Next change to the backend directory and execure the following maven command:

mvn clean package spring-boot:run

Build and Run the Angular Frontend Application

Open another terminal and change to the directory where the code was checked out. Next change to the frontend directory abd execute the following commands:

yarn install
yarn start

View the Application

Open an internet browser and navigate to the url: http://localhost:4200

You will be presented with the Keycloak login screen:

Enter one of the username and password combination created earlier to sign in.

After a successful login you will see the product catalog page: