refactor: 요청실패시 /login?error 로 리다이렉팅 되는 에러 수정

기본 FailureHandler가 위 url로 리다이렉팅 되도록 구현되어 있으므로 직접 구현해서 200응답을 반환하도록 변경하였다.

backend/src/main/java/aimo/backend/common/security/SecurityConfig.java

@@ -19,6 +19,7 @@
 import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
 
 import aimo.backend.common.properties.SecurityProperties;
+import aimo.backend.common.security.oAuth.OAuth2LoginFailureHandler;
 import aimo.backend.domains.member.service.MemberService;
 import aimo.backend.common.security.filter.exceptionHandlingFilter.ExceptionHandlingFilter;
 import aimo.backend.common.security.filter.jwtFilter.JwtAuthenticationFilter;
@@ -39,6 +40,7 @@ public class SecurityConfig {
 	private final JwtTokenProvider jwtTokenProvider;
 	private final CustomOAuth2UserService customOAuth2UserService;
 	private final OAuth2LoginSuccessHandler oAuth2LoginSuccessHandler;
+	private final OAuth2LoginFailureHandler oAuth2LoginFailureHandler;
 
 	private final UrlBasedCorsConfigurationSource ConfigurationSource;
 	private final SecurityProperties securityProperties;
@@ -83,7 +85,8 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
 			.oauth2Login((oauth2) -> oauth2
 				.userInfoEndpoint(userInfoEndpoint -> userInfoEndpoint
 					.userService(customOAuth2UserService))
-				.successHandler(oAuth2LoginSuccessHandler));
+				.successHandler(oAuth2LoginSuccessHandler)
+				.failureHandler(oAuth2LoginFailureHandler));
 
 		return http.build();
 	}

backend/src/main/java/aimo/backend/common/security/oAuth/OAuth2LoginFailureHandler.java

@@ -0,0 +1,31 @@
+package aimo.backend.common.security.oAuth;
+
+import java.io.IOException;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
+import org.springframework.stereotype.Component;
+
+import aimo.backend.common.dto.DataResponse;
+import aimo.backend.common.util.responseWriter.ResponseWriter;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+@Component
+public class OAuth2LoginFailureHandler extends SimpleUrlAuthenticationFailureHandler {
+
+	@Override
+	public void onAuthenticationFailure(
+		HttpServletRequest request,
+		HttpServletResponse response,
+		AuthenticationException exception
+	) {
+
+		log.error("OAuth2 authentication failed", exception);
+
+		ResponseWriter.writeResponse(response, DataResponse.ok(), HttpStatus.OK);
+	}
+}