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Keycloak

We use Keycloak as our OpenID Connect provider.

Running keycloak

We will use Docker compose to run Keycloak, along with a PostgreSQL database and httpbin for debugging.

  1. Start Keycloak through docker-compose up.

  2. Open http://localhost:8090/auth/ and login with username admin and password Pa55w0rd to access the admin UI and check Keycloak is running

What you’ll get

  • a realm named spring-cloud-gateway-realm.

  • a client named spring-cloud-gateway-client with:

    • Access Type: confidential and Credentials Secret:k725YLf1lT3nC88Ki8L3plZa8Z3Jeo37

    • Valid Redirect URIs: http://localhost:8080/*

    • Access Token Lifespan: 20 minutes

  • a user named alice.

  • a user named bob.

Getting a JSON Web Token

We want to extract a valid JSON Web Token to use in our leave application tests. For that we will throw up two quick components; - first a OAuth2 Client application, named Leave App Gateway; - secondly httpbin, which echoes back the request details.

  1. Ensure leaveapp-initial is not running.

  2. Start the leaveapp-gateway application ./mvnw spring-boot:run --file adding-spring-security/leaveapp-gateway/pom.xml

  3. Open http://localhost:8080/get in your browser.

  4. The browser will redirect you to Keycloak to login.

  5. Use alice / password to login.

  6. Keycloak will redirect you back to the gateway.

  7. The gateway will call out to httpbin.

  8. Httpbin will show you the GET request details.

  9. Your access token is the value behind Bearer under headers > Authorization.

Example GET response containing Bearer token.
{
"args": {},
"headers": {
"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
"Accept-Encoding": "gzip, deflate, br",
"Accept-Language": "en-US,en;q=0.9,nl;q=0.8",
"Authorization": "Bearer eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJ2TFlRY2lfcUJoLVlhbUlTQXU2VWNoQ2E5S0tRMFZyelZVOFJFMVljT0VrIn0.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.DsxVL1FGsVQFI39P6nx0l0iwAlofyEPblyG0CuhwY2UaNM3tk-64QYbXc-9t00xzLRs-R8z-RQOjrdPSryVQnuWl4rLY61szFYM3Eb19BgcGLlAjws9HRbgBNFFNgaDV7gvs88ST4qLRrtbeptc7uKgy_Os8DkygmpcQTo7RWI-PqHXj2qPZGw6eIJ99af9chcelh7vIowcXroThdrHtnyUaicE28xfCY371lGN1fwBQWnZYfD47s6WjikE2v41SkcZqjqk5DG5fEQ0PE2RvqaoU5-o_MDRIVssKj7KNFmCcXXYMyYgWHajzsiP86-LpQuoXtNrx6KlgZVP5orBZMA",
"Content-Length": "0",
"Cookie": "io=alRa3Yc4OknyPT4TAAAG; SESSION=4ebed83d-c838-48ca-9bd3-d56611b9da93",
"Dnt": "1",
"Forwarded": "proto=http;host=\"localhost:8080\";for=\"[0:0:0:0:0:0:0:1%0]:60280\"",
"Host": "localhost:8100",
"Sec-Ch-Ua": "\".Not/A)Brand\";v=\"99\", \"Google Chrome\";v=\"103\", \"Chromium\";v=\"103\"",
"Sec-Ch-Ua-Mobile": "?0",
"Sec-Ch-Ua-Platform": "\"Linux\"",
"Sec-Fetch-Dest": "document",
"Sec-Fetch-Mode": "navigate",
"Sec-Fetch-Site": "none",
"Sec-Fetch-User": "?1",
"Upgrade-Insecure-Requests": "1",
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36.",
"X-Forwarded-Host": "localhost:8080"
},
"origin": "0:0:0:0:0:0:0:1%0",
"url": "http://localhost:8080/get"
}

Cleaning up

Once you’re done running Keycloak, you can shut it down and clean it up through:

Clean up Keycloak
docker-compose down --volumes
⚡