diff --git a/lib/http/loading_state.dart b/lib/http/loading_state.dart
index 048d3003..229c5610 100644
--- a/lib/http/loading_state.dart
+++ b/lib/http/loading_state.dart
@@ -2,25 +2,52 @@ abstract class LoadingState<T> {
   const LoadingState();
 
   factory LoadingState.loading() = Loading;
-  // factory LoadingState.empty() = Empty;
   factory LoadingState.success(T response) = Success<T>;
   factory LoadingState.error(String errMsg) = Error;
 }
 
 class Loading extends LoadingState<Never> {
-  const Loading();
-}
+  Loading._internal();
 
-// class Empty extends LoadingState<Never> {
-//   const Empty();
-// }
+  static final Loading _instance = Loading._internal();
+
+  factory Loading() => _instance;
+}
 
 class Success<T> extends LoadingState<T> {
   final T response;
   const Success(this.response);
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) {
+      return true;
+    }
+    if (other is Success) {
+      return response == other.response;
+    }
+    return false;
+  }
+
+  @override
+  int get hashCode => response.hashCode;
 }
 
 class Error extends LoadingState<Never> {
   final String errMsg;
   const Error(this.errMsg);
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) {
+      return true;
+    }
+    if (other is Error) {
+      return errMsg == other.errMsg;
+    }
+    return false;
+  }
+
+  @override
+  int get hashCode => errMsg.hashCode;
 }
diff --git a/lib/pages/common/common_controller.dart b/lib/pages/common/common_controller.dart
index d2664ec3..d2a897cf 100644
--- a/lib/pages/common/common_controller.dart
+++ b/lib/pages/common/common_controller.dart
@@ -39,9 +39,7 @@ abstract class CommonController extends GetxController
 
   Future<LoadingState> customGetData();
 
-  List? handleListResponse(List currentList, List dataList) {
-    return null;
-  }
+  void handleListResponse(List dataList) {}
 
   bool customHandleResponse(Success response) {
     return false;
@@ -51,28 +49,28 @@ abstract class CommonController extends GetxController
     return false;
   }
 
-  // void handleSuccess(List currentList, List dataList) {}
-
   Future queryData([bool isRefresh = true]) async {
     if (isLoading || (isRefresh.not && isEnd)) return;
     isLoading = true;
     LoadingState response = await customGetData();
     if (response is Success) {
       if (!customHandleResponse(response)) {
-        List dataList = (response.response as List?) ?? [];
-        if (dataList.isEmpty) {
+        List? dataList = response.response;
+        if (dataList.isNullOrEmpty) {
           isEnd = true;
+          if (isRefresh) {
+            loadingState.value = response;
+          }
+          return;
+        }
+        handleListResponse(dataList!);
+        if (isRefresh) {
+          loadingState.value = LoadingState.success(dataList);
+        } else if (loadingState.value is Success) {
+          List currentList = (loadingState.value as Success).response ?? [];
+          currentList.addAll(dataList);
+          loadingState.value = LoadingState.success(currentList);
         }
-        List currentList = loadingState.value is Success
-            ? (loadingState.value as Success).response
-            : [];
-        List? handleList = handleListResponse(currentList, dataList);
-        loadingState.value = isRefresh
-            ? handleList != null
-                ? LoadingState.success(handleList)
-                : response
-            : LoadingState.success(currentList + dataList);
-        // handleSuccess(currentList, response.response);
       }
       currentPage++;
     } else {
diff --git a/lib/pages/msg_feed_top/sys_msg/controller.dart b/lib/pages/msg_feed_top/sys_msg/controller.dart
index 8cfbff11..a2fa1326 100644
--- a/lib/pages/msg_feed_top/sys_msg/controller.dart
+++ b/lib/pages/msg_feed_top/sys_msg/controller.dart
@@ -15,15 +15,14 @@ class SysMsgController extends CommonController {
   }
 
   @override
-  List? handleListResponse(List currentList, List dataList) {
+  void handleListResponse(List dataList) {
     if (cursor == -1) {
-      msgSysUpdateCursor(dataList.firstOrNull?.cursor);
+      msgSysUpdateCursor(dataList.first?.cursor);
     }
-    cursor = dataList.lastOrNull?.cursor ?? -1;
+    cursor = dataList.last?.cursor ?? -1;
     if (isEnd.not && dataList.length + 1 < pageSize) {
       isEnd = true;
     }
-    return null;
   }
 
   Future msgSysUpdateCursor(int? cursor) async {
diff --git a/lib/pages/rcmd/controller.dart b/lib/pages/rcmd/controller.dart
index c15a888a..a578a078 100644
--- a/lib/pages/rcmd/controller.dart
+++ b/lib/pages/rcmd/controller.dart
@@ -28,14 +28,21 @@ class RcmdController extends CommonController {
   }
 
   @override
-  List? handleListResponse(List currentList, List dataList) {
-    bool shouldSaveLast =
-        enableSaveLastData && currentPage == 0 && currentList.isNotEmpty;
-    if (shouldSaveLast && currentList.length > 500) {
-      currentList.removeRange(50, currentList.length);
+  void handleListResponse(List dataList) {
+    if (enableSaveLastData &&
+        currentPage == 0 &&
+        loadingState.value is Success) {
+      List? currentList = (loadingState.value as Success).response;
+      if (currentList?.isNotEmpty == true) {
+        if (savedRcmdTip) {
+          lastRefreshAt = dataList.length;
+        }
+        if (currentList!.length > 500) {
+          currentList.removeRange(50, currentList.length);
+        }
+        dataList.addAll(currentList);
+      }
     }
-    lastRefreshAt = shouldSaveLast && savedRcmdTip ? dataList.length : null;
-    return shouldSaveLast ? (dataList..addAll(currentList)) : null;
   }
 
   @override
diff --git a/lib/pages/webdav/webdav.dart b/lib/pages/webdav/webdav.dart
index 7ab6525e..f1a8e6d7 100644
--- a/lib/pages/webdav/webdav.dart
+++ b/lib/pages/webdav/webdav.dart
@@ -1,5 +1,4 @@
 import 'dart:convert';
-import 'dart:io';
 import 'package:PiliPlus/common/widgets/pair.dart';
 import 'package:PiliPlus/utils/extension.dart';
 import 'package:PiliPlus/utils/storage.dart';
@@ -60,10 +59,9 @@ class WebDav {
     try {
       String data = await GStorage.exportAllSettings();
       final path = '$_webdavDirectory/piliplus_settings.json';
-      final file = File(path);
-      if (await file.exists()) {
-        await file.delete();
-      }
+      try {
+        await _client!.remove(path);
+      } catch (_) {}
       await _client!.write(path, utf8.encode(data));
       SmartDialog.showToast('备份成功');
     } catch (e) {