Refactor/ec 55 be 로그인 예외처리 리팩토링 (#44)

* [EC-55] refactor: 로그인 예외처리 ENUM 사용

* [EC-55] feat: 토큰 재발급 예외 처리 추가
refresh 토큰 없는 요청에 대한 예외 처리 추가

Author: ysc13245

api/src/main/java/org/example/educheck/domain/member/controller/AuthController.java

@@ -1,5 +1,6 @@
 package org.example.educheck.domain.member.controller;
 
+import io.jsonwebtoken.security.SignatureException;
 import jakarta.servlet.http.HttpServletResponse;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
@@ -67,7 +68,12 @@ public ResponseEntity<Object> refreshTokenRotation(
             @CookieValue(value = "refresh_token", required = true) String refreshToken,
             HttpServletResponse response) {
 
-        String email = jwtTokenUtil.getEmail(refreshToken);
+        String email;
+        try {
+            email = jwtTokenUtil.getEmail(refreshToken);
+        } catch (SignatureException ex) {
+            throw new LoginValidationException();
+        }
         LoginResponseDto loginResponseDto = authService.refreshTokenRotation(response, email);
 
         return ResponseEntity.status(HttpStatus.OK)

api/src/main/java/org/example/educheck/domain/member/service/AuthService.java

@@ -134,7 +134,7 @@ public LoginResponseDto refreshTokenRotation(HttpServletResponse response, Strin
 
         Member member = memberRepository.findByEmail(email).orElse(null);
         return memberRepository.findLoginResponseDtoByMemberId(member.getId())
-                .orElseThrow(() -> new LoginValidationException());
+                .orElseThrow(LoginValidationException::new);
 
 
     }

api/src/main/java/org/example/educheck/global/common/exception/handler/GlobalExceptionHandler.java

@@ -7,6 +7,7 @@
 import org.springframework.http.ResponseEntity;
 import org.springframework.validation.FieldError;
 import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.MissingRequestCookieException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 
@@ -49,4 +50,12 @@ public ResponseEntity<ApiResponse<Object>> methodArgumentNotValidHandler(
                 .body(ApiResponse.error(errorMessage,
                         ErrorCode.INVALID_INPUT.getCode()));
     }
+
+    @ExceptionHandler(MissingRequestCookieException.class)
+    public ResponseEntity<ApiResponse<Object>> missingRequestCookieException(MissingRequestCookieException ex) {
+        return ResponseEntity
+                .status(ErrorCode.UNAUTHORIZED.getStatus())
+                .body(ApiResponse.error(ErrorCode.UNAUTHORIZED.getMessage(),
+                        ErrorCode.UNAUTHORIZED.getCode()));
+    }
 }