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Reactive Spring WebFlux API + Real-time React

This example shows how to build a Reactive Spring WebFlux API, secure it with OIDC, then add real-time capabilities to a React client.

Please read Build Reactive APIs with Spring WebFlux to see how this API was created. To see how to build the React app and integrate WebSockets, see Full Stack Reactive with Spring WebFlux, WebSockets, and React.

Prerequisites: Java 8, Maven, and an Okta Developer Account.

Okta has Authentication and User Management APIs that reduce development time with instant-on, scalable user infrastructure. Okta's intuitive API and expert support make it easy for developers to authenticate, manage, and secure users and roles in any application.

Getting Started

Clone this application to your local hard drive using Git.

git clone https://github.com/oktadeveloper/okta-spring-webflux-react-example.git webflux-api-example

To get both the Spring WebFlux API and the React app, you can checkout the react-app branch.

git clone -b react-app https://github.com/oktadeveloper/okta-spring-webflux-react-example.git full-stack-reactive

You will need to create an OIDC Application in Okta to get your settings to log in.

  1. Log in to your developer account on developer.okta.com.
  2. Navigate to Applications and click on Add Application.
  3. Select Web and click Next.
  4. Give the application a name (e.g., Spring WebFlux API) and add the following as Login redirect URIs:
    • http://localhost:8080/login/oauth2/code/okta
    • http://localhost:3000/implicit/callback
    • https://oidcdebugger.com/debug
  5. Click Done, then edit the project and enable "Implicit (Hybrid)" as a grant type (allow ID and access tokens) and click Save.

Copy the settings from your OIDC app into reactive-web/src/main/resources/application.yml:

oidc:
  issuer-uri: https://{yourOktaDomain}/oauth2/default
  client-id: {clientId}
  client-secret: {clientSecret}

spring:
  security:
    oauth2:
      client:
        provider:
          okta:
            issuer-uri: ${oidc.issuer-uri}
        registration:
          okta:
            client-id: ${oidc.client-id}
            client-secret: ${oidc.client-secret}
            scope: openid, email, profile
      resourceserver:
        jwt:
          issuer-uri: ${oidc.issuer-uri}

After making these changes, you should be able to start the app (using ./mvnw in the reactive-web directory), navigate to http://localhost:8080/profiles and log in with your Okta credentials.

If you'd like to run the React client (and you've checked out the react-app branch), you'll need to modify react-app/src/App.tsx to specify your Okta settings.

const config = {
  issuer: 'https://{yourOktaDomain}/oauth2/default',
  redirect_uri: window.location.origin + '/implicit/callback',
  client_id: {clientId}
};

You can start the React app by running the following commands (in the react-app directory):

npm install
npm start

Links

This example uses the following open source libraries:

Help

Please post any questions as comments on the blog post, or visit our Okta Developer Forums. You can also email [email protected] if you'd like to create a support ticket.

License

Apache 2.0, see LICENSE.