PreAuthorize error handling

Question

I'm using Spring Oauth2 and Spring Pre-post Annotations With Spring-boot

I Have a service class MyService. one of MyService methods is:

@PreAuthorize("#id.equals(authentication.principal.id)")
public SomeResponse getExampleResponse(String id){...}

can i control in some manner the json that is returned by the caller Controller?

the json that is returned by default is:

{error : "access_denied" , error_message: ".."}

I Want to be able to control the error_message param. I'm looking for something similar to:

@PreAuthorize(value ="#id.equals(authentication.principal.id)", onError ="throw new SomeException("bad params")")
public SomeResponse getExampleResponse(String id){...}

One way i thought of doing it is by Using ExceptionHandler

@ExceptionHandler(AccessDeniedException.class)
public Response handleAccessDeniedException(Exception ex, HttpServletRequest request){
    ...
}

but i can't control the message of the exception. and also i can't be sure that this Exception will be thrown in future releases

Answer 1

Spring Boot docs on error handling: http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-error-handling. One way you can control the JSON is by adding a @Bean of type ErrorAttributes.

@Bean
ErrorAttributes errorAttributes() {
    return new MyErrorAttributes();
}