fix. success handler custom

BE/src/main/java/team07/airbnb/config/security/CustomSuccessHandler.java

@@ -0,0 +1,35 @@
+package team07.airbnb.config.security;
+
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.web.savedrequest.HttpSessionRequestCache;
+import org.springframework.security.web.savedrequest.RequestCache;
+import org.springframework.security.web.savedrequest.SavedRequest;
+import org.springframework.security.web.authentication.SavedRequestAwareAuthenticationSuccessHandler;
+import org.springframework.stereotype.Component;
+
+
+import java.io.IOException;
+
+@Component
+public class CustomSuccessHandler extends SavedRequestAwareAuthenticationSuccessHandler {
+
+    private final RequestCache requestCache = new HttpSessionRequestCache();
+
+    @Override
+    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws ServletException, IOException, ServletException {
+        SavedRequest savedRequest = requestCache.getRequest(request, response);
+
+        if (savedRequest == null) {
+            super.onAuthenticationSuccess(request, response, authentication);
+            return;
+        }
+
+        String targetUrl = savedRequest.getRedirectUrl();
+        targetUrl = "/api" + targetUrl;
+
+        getRedirectStrategy().sendRedirect(request, response, targetUrl);
+    }
+}

BE/src/main/java/team07/airbnb/config/security/SecurityConfig.java

@@ -19,6 +19,7 @@
 public class SecurityConfig {
 
     private final CustomOAuthUserService oAuth2UserService;
+    private final CustomSuccessHandler successHandler;
 
     @Bean
     public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
@@ -46,17 +47,13 @@ public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
                 .oauth2Login(
                         oAuth -> {
                             oAuth.userInfoEndpoint(userInfo -> userInfo.userService(oAuth2UserService));
-                            oAuth.successHandler(savedRequestAwareAuthenticationSuccessHandler());
+                            oAuth.successHandler(successHandler);
                         }
                 );
 
         return http.build();
     }
 
-    @Bean
-    public AuthenticationSuccessHandler savedRequestAwareAuthenticationSuccessHandler() {
-        return new SavedRequestAwareAuthenticationSuccessHandler();
-    }
 
 //    @Bean
 //    protected SecurityFilterChain filterChain(HttpSecurity http) throws Exception {