Okta Micronaut Sample

This example shows you how to use the Micronaut's OAuth 2.0 support to login a user. The login is achieved through the Authorization Code Flow where the user is redirected to the Okta-Hosted login page. After the user authenticates, they are redirected back to the application and a local cookie session is created.

It also shows how to return the user's information from an API using an OAuth 2.0 access token.

Prerequisites

Before running this sample, you will need the following:

• Java 17+
• The Okta CLI Tool
• An Okta Developer Account, create one using okta register, or configure an existing one with okta login

Get the Code

Grab and configure this project using okta start micronaut.

You can also clone this repo and run okta start in it.

git clone https://github.com/okta-samples/okta-micronaut-sample.git
cd okta-micronaut-sample
okta start

Run the Example

source .okta.env

Maven

Run the application with Maven

./mvnw mn:run

The application uses Micronaut Ahead-of-time optimizations (AOT) optimizations via the Micronaut Maven Plugin. You can enable Micronaut Security AOT optimizations in aot-jar.properties.

Gradle

Run the application via the Micronaut Application Gradle Plugin.

./gradlew run

Or, run an optimized JAR with Gradle:

./gradle optimizedRun

Log in at http://localhost:8080.

API Access with OAuth 2.0

You can also retrieve user information from the /hello endpoint with an OAuth 2.0 access token.

First, you'll need to generate an access token.

1. Run okta apps create spa. Set oidcdebugger as an app name and press Enter.

2. Use https://oidcdebugger.com/debug for the Redirect URI and set the Logout Redirect URI to https://oidcdebugger.com.

3. Navigate to the OpenID Connect Debugger website.

   1. Fill in your client ID
   2. Use https://{yourOktaDomain}/oauth2/default/v1/authorize for the Authorize URI
   3. Select code for the response type and Use PKCE
   4. Click Send Request to continue

4. Set the access token as a TOKEN environment variable in a terminal window.

   TOKEN=eyJraWQiOiJYa2pXdjMzTDRBYU1ZSzNGM...
   

5. Test the API with HTTPie and an access token.

   http :8080/hello Authorization:"Bearer $TOKEN"
   

Learn More

For more details on how to build an application with Okta and Micronaut you can read Build Native Java Apps with Micronaut, Quarkus, and Spring Boot.