Add filter before OAuth2AuthenticationProcessingFilter

Question

I am using spring-security-oauth2 in IDP mode and spring-boot. I need to do some work before the oauth token is extracted from the request. How do I add a filter before OAuth2AuthenticationProcessingFilter?

I have tried:

@Configuration
@EnableResourceServer
public class OAuth2ResourceServerConfigurerAdapter extends ResourceServerConfigurerAdapter {

    @Override
    public void configure(HttpSecurity http) throws Exception {

        http.authorizeRequests().anyRequest().authenticated().and()
                .addFilterBefore(new MyFilter(), OAuth2AuthenticationProcessingFilter.class);
    }

}

But I get the following exception:

java.lang.IllegalArgumentException: Cannot register after unregistered Filter class org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter

I guess this might be because @EnableResourceServer is executed after configure(HttpSecurity http).

Answer 1

I achieved desired functional by doing this

                .addFilterBefore(new MyTokenFilter(), AbstractPreAuthenticatedProcessingFilter.class)