[BUG] 인증 서버 오류 (#193)

* fix: 인증 서버 오류 (#168)

* fix: JSON 변환 오류 로깅 (#168)

Author: hyunmin0317

src/main/java/com/smunity/server/domain/auth/dto/AuthCourseResponseDto.java

@@ -4,12 +4,16 @@
 import com.smunity.server.global.common.entity.enums.Category;
 import com.smunity.server.global.common.entity.enums.SubDomain;
 import lombok.Builder;
+import lombok.extern.slf4j.Slf4j;
 import org.json.JSONArray;
+import org.json.JSONException;
 import org.json.JSONObject;
 
 import java.util.List;
+import java.util.Optional;
 import java.util.stream.IntStream;
 
+@Slf4j
 @Builder
 public record AuthCourseResponseDto(
         String number,
@@ -25,10 +29,20 @@ public record AuthCourseResponseDto(
     public static List<AuthCourseResponseDto> from(JSONArray objs) {
         return IntStream.range(0, objs.length())
                 .mapToObj(i -> from(objs.getJSONObject(i)))
+                .flatMap(Optional::stream)
                 .toList();
     }
 
-    private static AuthCourseResponseDto from(JSONObject obj) {
+    private static Optional<AuthCourseResponseDto> from(JSONObject obj) {
+        try {
+            return Optional.of(of(obj));
+        } catch (JSONException e) {
+            log.error("[ERROR] Failed to convert JSON object: '{}'.", obj, e);
+            return Optional.empty();
+        }
+    }
+
+    private static AuthCourseResponseDto of(JSONObject obj) {
         return AuthCourseResponseDto.builder()
                 .number(obj.getString("SBJ_NO"))
                 .name(obj.getString("SBJ_NM"))

src/main/java/com/smunity/server/domain/auth/util/AuthUtil.java

@@ -21,14 +21,14 @@
 public class AuthUtil {
 
     private static final String LOGIN_URL = "https://smsso.smu.ac.kr/Login.do";
-    private static final String BASE_URL = "https://smul.smu.ac.kr";
+    private static final String BASE_URL = "https://smul.smu.ac.kr/";
 
     public static JSONArray getCourses(AuthRequestDto requestDto) {
-        return getData(requestDto, "/UsrRecMatt/list.do", "dsRecMattList");
+        return getData(requestDto, "UsrRecMatt/list.do", "dsRecMattList");
     }
 
     public static JSONObject getInfo(AuthRequestDto requestDto) {
-        JSONArray response = getData(requestDto, "/UsrSchMng/selectStdInfo.do", "dsStdInfoList");
+        JSONArray response = getData(requestDto, "UsrSchMng/selectStdInfo.do", "dsStdInfoList");
         return response.getJSONObject(0);
     }
 
@@ -49,8 +49,8 @@ private static JSONObject getData(AuthRequestDto requestDto, String url) {
             connection.getOutputStream().write(createRequestData(requestDto));
             return readResponse(connection);
         } catch (IOException e) {
-            log.error("[ERROR] Failed to fetch data from URL: '{}'. Request: {}", url, requestDto, e);
-            throw new GeneralException(ErrorCode.AUTH_INTERNAL_SERVER_ERROR);
+            log.error("[ERROR] Failed to fetch data from URL: '{}'.", url, e);
+            throw new GeneralException(ErrorCode.AUTH_FETCH_FAILURE);
         }
     }
 
@@ -59,6 +59,7 @@ private static Map<String, String> login(AuthRequestDto requestDto) {
             Connection.Response loginResponse = executeLogin(requestDto);
             return getSessionCookies(loginResponse);
         } catch (IOException e) {
+            log.error("[ERROR] Failed to Login.", e);
             throw new GeneralException(ErrorCode.AUTH_LOGIN_FAIL);
         }
     }
@@ -75,11 +76,13 @@ private static Connection.Response executeLogin(AuthRequestDto requestDto) throw
     }
 
     private static Map<String, String> getSessionCookies(Connection.Response loginResponse) throws IOException {
-        return Jsoup.connect(BASE_URL + "/index.do")
+        Connection.Response response = Jsoup.connect(BASE_URL + "index.do")
                 .method(Connection.Method.GET)
                 .cookies(loginResponse.cookies())
-                .execute()
-                .cookies();
+                .execute();
+        if (!response.url().toString().equals(BASE_URL))
+            throw new GeneralException(ErrorCode.AUTH_EXCEEDED_LOGIN_ATTEMPTS);
+        return response.cookies();
     }
 
     private static HttpURLConnection createConnection(String url, Map<String, String> session) throws IOException {

src/main/java/com/smunity/server/global/exception/code/ErrorCode.java

@@ -35,8 +35,9 @@ public enum ErrorCode {
     // Auth Errors
     AUTH_UNAUTHORIZED(401, "AUTH001", "아이디 및 비밀번호가 일치하지 않습니다."),
     AUTH_LOGIN_FAIL(401, "AUTH002", "샘물포털 로그인에 실패했습니다."),
-    AUTH_INTERNAL_SERVER_ERROR(500, "AUTH003", "인증 서버 에러, 관리자에게 문의 바랍니다."),
-    AUTH_INVALID_FORMAT(500, "AUTH004", "응답 형식 오류, 관리자에게 문의 바랍니다."),
+    AUTH_FETCH_FAILURE(401, "AUTH003", "인증 서버 에러, 관리자에게 문의 바랍니다."),
+    AUTH_INVALID_FORMAT(401, "AUTH004", "응답 형식 오류, 관리자에게 문의 바랍니다."),
+    AUTH_EXCEEDED_LOGIN_ATTEMPTS(401, "AUTH005", "로그인 실패 5회 초과, 샘물 포탈을 통해 비밀번호 초기화를 진행해주시기 바랍니다."),
 
     // Member Errors
     MEMBER_FORBIDDEN(403, "MEMBER001", "사용자 권한이 없습니다."),