source: src/main/java/com/example/rezevirajmasa/demo/model/exceptions/CustomerAuthenticationEntryPoint.java

package com.example.rezevirajmasa.demo.model.exceptions;

import com.example.rezevirajmasa.demo.dto.ErrorDto;
import com.fasterxml.jackson.databind.ObjectMapper;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

import java.io.IOException;

@Component
public class CustomerAuthenticationEntryPoint implements AuthenticationEntryPoint {
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response, org.springframework.security.core.AuthenticationException authException) throws IOException, ServletException {
        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        response.setHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
        OBJECT_MAPPER.writeValue(response.getOutputStream(), new ErrorDto("Unauthorized path"));
    }

}