package shop.mtcoding.blog._core.errors;

import jakarta.servlet.http.HttpServletRequest;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import shop.mtcoding.blog._core.errors.exception.*;

// RuntimeException이 터지면 해당 파일로 오류가 모인다
@ControllerAdvice
public class MyExceptionHandler {

    @ExceptionHandler(Exception400.class)
    public String ex400(Exception400 e, HttpServletRequest request){
        request.setAttribute("msg", e.getMessage());
        return "err/400";
    }
    @ExceptionHandler(Exception401.class)
    public String ex401(Exception401 e, HttpServletRequest request){
        request.setAttribute("msg", e.getMessage());
        return "err/401";
    }
    @ExceptionHandler(Exception403.class)
    public String ex403(RuntimeException e, HttpServletRequest request){
        request.setAttribute("msg", e.getMessage());
        return "err/403";
    }
    @ExceptionHandler(Exception404.class)
    public String ex404(RuntimeException e, HttpServletRequest request){
        request.setAttribute("msg", e.getMessage());
        return "err/404";
    }
    @ExceptionHandler(Exception500.class)
    public String ex500(RuntimeException e, HttpServletRequest request){
        request.setAttribute("msg", e.getMessage());
        return "err/500";
    }

}

이게 전부 뷰를 리턴하니까, 제이슨을 리턴하도록 바꿔줄거임

이렇게 바꿈

package shop.mtcoding.blog._core.errors;

import jakarta.servlet.http.HttpServletRequest;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestController;
import shop.mtcoding.blog._core.errors.exception.*;
import shop.mtcoding.blog._core.utils.ApiUtil;

// RuntimeException이 터지면 해당 파일로 오류가 모인다
@RestController // 데이터를 응답받음
public class MyExceptionHandler {

    @ExceptionHandler(Exception400.class)
    public ResponseEntity<?> ex400(Exception400 e){
        // http body -> 구성한 객체
        ApiUtil<?> apiUtil = new ApiUtil<>(400, e.getMessage());
        return new ResponseEntity<>(apiUtil, HttpStatus.BAD_REQUEST); // http header, http body
    }

    @ExceptionHandler(Exception401.class)
    public ResponseEntity<?> ex401(Exception401 e){
        ApiUtil<?> apiUtil = new ApiUtil<>(401, e.getMessage());
        return new ResponseEntity<>(apiUtil, HttpStatus.UNAUTHORIZED);
    }

    @ExceptionHandler(Exception403.class)
    public ResponseEntity<?> ex403(RuntimeException e){
        ApiUtil<?> apiUtil = new ApiUtil<>(403, e.getMessage());
        return new ResponseEntity<>(apiUtil, HttpStatus.FORBIDDEN);
    }

    @ExceptionHandler(Exception404.class)
    public ResponseEntity<?> ex404(RuntimeException e){
        ApiUtil<?> apiUtil = new ApiUtil<>(404, e.getMessage());
        return new ResponseEntity<>(apiUtil, HttpStatus.NOT_FOUND);
    }

    @ExceptionHandler(Exception500.class)
    public ResponseEntity<?> ex500(RuntimeException e){
        ApiUtil<?> apiUtil = new ApiUtil<>(500, e.getMessage());
        return new ResponseEntity<>(apiUtil, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}