👀 Views: 70 💬 Answers: 1 📅 Created: 2025-06-07

spring-boot keycloak oauth2 Java

I'm having a hard time understanding Hey everyone, I'm running into an issue that's driving me crazy... I've hit a wall trying to After trying multiple solutions online, I still can't figure this out. I'm currently working on integrating Keycloak as an identity provider in my Spring Boot application, specifically implementing the OAuth2 Authorization Code flow. I set up Keycloak and created a client for my application, but I'm running into issues with the redirect URI and token exchange. When I attempt to authenticate, I'm redirected to Keycloak's login page, but after a successful login, I'm redirected back to my application with an behavior: `"Invalid redirect_uri"`. My setup in `application.yml` looks like this: ```yaml spring: security: oauth2: client: registration: keycloak: client-id: my-client client-secret: my-secret redirect-uri: '{baseUrl}/login/oauth2/code/{registrationId}' authorization-grant-type: authorization_code scope: openid, profile, email provider: keycloak: authorization-uri: http://localhost:8080/auth/realms/my-realm/protocol/openid-connect/auth token-uri: http://localhost:8080/auth/realms/my-realm/protocol/openid-connect/token user-info-uri: http://localhost:8080/auth/realms/my-realm/protocol/openid-connect/userinfo jwks-uri: http://localhost:8080/auth/realms/my-realm/protocol/openid-connect/certs ``` I've made sure that the redirect URI configured in Keycloak matches exactly with the one in my Spring Boot application, but I still get the same behavior. Additionally, I've checked the Keycloak logs, which show that the request is received but fails due to the invalid redirect URI. I've tried various formats for the redirect URI, including hardcoding it and using patterns, but nothing seems to work. Is there a configuration I'm missing, or any common pitfalls to avoid when setting this up? Any insights would be greatly appreciated! For context: I'm using Java on Ubuntu. For context: I'm using Java on Windows 11. I'm working in a Ubuntu 22.04 environment. Could this be a known issue? Any examples would be super helpful. I recently upgraded to Java 3.11. Has anyone else encountered this? This is happening in both development and production on Windows 10.