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README.md

app-nodejs-html5: HTML5 Service Invocation Application

Level: Beginner Technologies: HTML5, JavaScript Summary: HTML5 Service Invocation Application run under Express Target Product: Keycloak Source: https://github.com/keycloak/keycloak-quickstarts

What is it?

The app-nodejs-html5 quickstart demonstrates how to write an application with HTML5 and JavaScript that authenticates using Keycloak. Once authenticated the application shows how to invoke a service secured with Keycloak.

System Requirements

You need to have Node.js version 12.x or later installed.

The quickstart requires that you have the service-nodejs running. It assumes the services are located at http://localhost:3000/service. If the services are running elsewhere you need to edit app.js and replace the value of serviceUrl.

Configuration in Keycloak

Prior to running the quickstart you need to create a client in Keycloak and download the installation file.

The following steps show how to create the client required for this quickstart:

  • Open the Keycloak admin console
  • Select Clients from the menu
  • Click Create
  • Add the following values:
    • Client ID: You choose (for example app-html5)
    • Client Protocol: openid-connect
    • Root URL: URL to the application (for example http://localhost:8080/app-html5).
  • Click Save

If you deploy the application somewhere else change the hostname and port of the URLs accordingly.

Once saved you need to change the Access Type to public and click save.

Finally you need to configure the JavaScript adapter, this is done by retrieving the adapter configuration file:

  • Click on Installation in the tab for the client you created
  • Select Keycloak OIDC JSON
  • Click Download
  • Move the file keycloak.json to the src/main/webapp directory in the root of the quickstart

As an alternative you can create the client by importing the file client-import.json and copying config/keycloak-example.json to src/main/webapp/keycloak.json.

Build and Deploy the Quickstart

  1. Open a terminal and navigate to the root directory of this quickstart.

  2. The following shows the command to deploy the quickstart:

    npm install
npm run start

Access the Quickstart

You can access the application with the following URL: http://localhost:8080/app-html5.

The application provides buttons that allows invoking the different endpoints on the service:

  • Invoke public - Invokes the public endpoint and doesn't require a user to be logged-in
  • Invoke secured - Invokes the secured endpoint and requires a user with the role user to be logged-in
  • Invoke admin - Invokes the secured endpoint and requires a user with the role admin to be logged-in

If you invoke the endpoints without the required permissions an error will be shown.