57. 인터셉터- 에러페이지 만들기

에러 페이지 화면 만들기

err/400.mustache

{{> /layout/header}}

<div class="container my-3">
    <h1>BadRequest 400</h1>
    <hr>
    <h41>{{msg}}</h41>
</div>

{{> /layout/footer}}

err/401.mustache 인증안됨

{{> /layout/header}}

<div class="container my-3">
    <h1>Unauthorized 401</h1>
    <hr>
    <h41>{{msg}}</h41>
</div>

{{> /layout/footer}}

err/403.mustache 권한없음

{{> /layout/header}}

<div class="container my-3">
    <h1>Forbidden 403</h1>
    <hr>
    <h41>{{msg}}</h41>

</div>

{{> /layout/footer}}

err/404.mustache

{{> /layout/header}}

<div class="container my-3">
    <h1>Not Found 404</h1>
    <hr>
    <h41>{{msg}}</h41>

</div>

{{> /layout/footer}}

err/500.mustache

{{> /layout/header}}

<div class="container my-3">
    <h1>Server Error 500</h1>
    <hr>
    <h41>{{msg}}</h41>

</div>

{{> /layout/footer}}

핸들러 만들기

_core/err/MyExceptionHandler

package shop.mtcoding.blog._core.err.exception;

public class Exception400 extends RuntimeException{

    public Exception400(String msg) {
        super(msg);
    }

}

@ControllerAdvice //runtimeException 이 터지만 해당 파일로 오류가 모인다.
public class MyExeptionHandler{

    @ExceptionHandler(Exception400.class)
    public String ex400(RuntimeException e){
        request.setAttribute("msg",e.getMessage());
        return "err/400";
    }
    @ExceptionHandler(Exception401.class)
    public String ex401(RuntimeException 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";
    }
}

    @GetMapping("/user/update-form")
    public String updateForm(HttpServletRequest request) {
        User sessionUser = (User) session.getAttribute("sessionUser");
        if (sessionUser == null) {
            throw new Exception401("인증되지 않았어요. 로그인해주세요");
        }

      User user =  userRepository.findById(sessionUser.getId());
        request.setAttribute("user",user);

        return "user/update-form";
    }