authorizationGrantType cannot be null in Spring Security 5 OAuth Client and Spring Boot 2.0
I followed the Spring Security 5.0 official reference documentation and sample codes oauth2login to setup OAuth2/OIDC authentication in my project, but it failed and I got the following exception when I booted up my application by mvn spring-boot:run.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clientRegistrationRepository'
defined in class path resource [org/springframework/boot/autoconfigure/security/oauth2/client/OAuth2ClientRegistrationRepositoryConfiguration.class]:
Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException:
Failed to instantiate [org.springframework.security.oauth2.client.registration.InMemoryClientRegistrationRepository]:
Factory method 'clientRegistrationRepository' threw exception;
nested exception is java.lang.IllegalArgumentException: authorizationGrantType cannot be null
I was using the default configuration provided by Spring Boot, and just added some basic dependencies into projects, such as spring-security-config, spring-security-oauth2-client, spring-security-oauth2-jsoe etc.
Updated:
I'v found the reason, for custom OAuth2 providers, such as Gitlab, I have to add grant type, redirectUritemplate, scope, clientName etc, but OpenID Connect specification has a configuration endpoint protocol, eg: https://gitlab.com/.well-known/openid-configuration , is there possible to make Spring Security to read these info automatically?
Answer
use redirect-uri instead of redirect-uri-template if use SpringBoot v2.2.1 RELEASE