Security Chain antMatchers 관련 Exception Handling

@RestControllerAdvice
@Slf4j
public class ExceptionManager {

    public static void setErrorResponse(HttpServletResponse response, ErrorCode errorCode) throws IOException {

        // 에러 응답코드 설정
        response.setStatus(errorCode.getHttpStatus().value());
        // 응답 body type JSON 타입으로 설정
        response.setContentType("application/json;charset=UTF-8");

        Response<ErrorDto> error = Response.error(new ErrorDto(errorCode.toString(), errorCode.getMessage()));

        //예외 발생 시 Error 내용을 JSON화 한 후 응답 body에 담아서 보낸다.
        Gson gson = new Gson();
        String responseBody = gson.toJson(error);

        response.getWriter().write(responseBody);
    }

}

@AllArgsConstructor
@Getter
public enum ErrorCode {

    TOKEN_NOT_FOUND(HttpStatus.UNAUTHORIZED, "토큰이 존재하지 않습니다."),
    FORBIDDEN_REQUEST(HttpStatus.FORBIDDEN, "ADMIN 회원만 접근할 수 있습니다.");
    
    private HttpStatus httpStatus;
    private String message;
}

import likelion.sns.Exception.ErrorCode;
import likelion.sns.Exception.ExceptionManager;
import lombok.extern.slf4j.Slf4j;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
@Slf4j
public class CustomAccessDeniedHandler implements AccessDeniedHandler {

    @Override
    public void handle(HttpServletRequest request, HttpServletResponse response, AccessDeniedException accessDeniedException) throws IOException {

        log.info("{}", accessDeniedException.getMessage());

        ErrorCode errorCode = ErrorCode.FORBIDDEN_REQUEST;

        ExceptionManager.setErrorResponse(response, errorCode);
    }
}

import likelion.sns.Exception.ErrorCode;
import likelion.sns.Exception.ExceptionManager;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpHeaders;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
@Slf4j
public class CustomAuthenticationEntryPointHandler implements AuthenticationEntryPoint {

    /**
     *  토큰 없이 Security Chain 에서 autenticated된 url 접근 시, 에러 핸들링
     */
    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException {
        final String authorization = request.getHeader(HttpHeaders.AUTHORIZATION);

        if (authorization == null) {
            log.error("토큰이 존재하지 않습니다.");
            ErrorCode errorCode = ErrorCode.TOKEN_NOT_FOUND;

            ExceptionManager.setErrorResponse(response, errorCode);
        }
    }
}