OpenIsle/backend/src/main/java/com/openisle/config/CustomAccessDeniedHandler.java

package com.openisle.config;

import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.stereotype.Component;

import java.io.IOException;

/**
 * Returns 401 Unauthorized when an authenticated user lacks required privileges.
 */
@Component
public class CustomAccessDeniedHandler implements AccessDeniedHandler {
    @Override
    public void handle(HttpServletRequest request,
                       HttpServletResponse response,
                       AccessDeniedException accessDeniedException) throws IOException, ServletException {
        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        response.setContentType("application/json");
        response.getWriter().write("{\"error\": \"Unauthorized\"}");
    }
}