Customize auth error from Spring Security using OAuth2

pakkk :

I was wondering if I could customize the following authorization error:

{
  "error": "unauthorized",
  "error_description": "Full authentication is required to access this resource"
}

I get it when the user request does not have permissions. And I would like to customize it to be quite similar than Spring Boot error:

{
 "timestamp":1445441285803,
 "status":401,
 "error":"Unauthorized",
 "message":"Bad credentials",
 "path":"/oauth/token"
}

Could it be possible?

Many thanks.

pakkk :

I got it :)

https://stackoverflow.com/a/37132751/2520689

I need to create a new class which implements "AuthenticationEntryPoint" as the following:

public class AuthExceptionEntryPoint implements AuthenticationEntryPoint
{
    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException arg2) throws IOException, ServletException
    {
        final Map<String, Object> mapBodyException = new HashMap<>() ;

        mapBodyException.put("error"    , "Error from AuthenticationEntryPoint") ;
        mapBodyException.put("message"  , "Message from AuthenticationEntryPoint") ;
        mapBodyException.put("exception", "My stack trace exception") ;
        mapBodyException.put("path"     , request.getServletPath()) ;
        mapBodyException.put("timestamp", (new Date()).getTime()) ;

        response.setContentType("application/json") ;
        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED) ;

        final ObjectMapper mapper = new ObjectMapper() ;
        mapper.writeValue(response.getOutputStream(), mapBodyException) ;
    }
}

And add it to my ResourceServerConfigurerAdapter implementation:

@Configuration
@EnableResourceServer
public class ResourceServerConfiguration extends ResourceServerConfigurerAdapter
{   
    @Override
    public void configure(HttpSecurity http) throws Exception
    {
        http.exceptionHandling().authenticationEntryPoint(new AuthExceptionEntryPoint()) ;

    }
}

You can find my GitHub project which implements everything you need:

https://github.com/pakkk/custom-spring-security