排查iOS中Http服务可能被系统取消的问题

lib/bloc/web_cubit.dart

@@ -63,6 +63,9 @@ class WebState extends Equatable {
 
   final String h5Version;
 
+  // 测试用，传递http服务检测错误消息
+  final String errMsg;
+
   const WebState({
     this.selectedIndex = 0,
     this.loaded = false,
@@ -87,6 +90,7 @@ class WebState extends Equatable {
     this.chooseVideoCmdFlag = false,
     this.chooseVideoCmdMessage = '',
     this.h5Version = '',
+    this.errMsg = '',
   });
 
   WebState copyWith({
@@ -114,6 +118,7 @@ class WebState extends Equatable {
     bool? chooseVideoCmdFlag,
     String? chooseVideoCmdMessage,
     String? h5Version,
+    String? errMsg,
   }) {
     return WebState(
       selectedIndex: selectedIndex ?? this.selectedIndex,
@@ -139,6 +144,7 @@ class WebState extends Equatable {
       chooseVideoCmdFlag: chooseVideoCmdFlag ?? this.chooseVideoCmdFlag,
       chooseVideoCmdMessage: chooseVideoCmdMessage ?? this.chooseVideoCmdMessage,
       h5Version: h5Version ?? this.h5Version,
+      errMsg: errMsg ?? this.errMsg,
     );
   }
 
@@ -167,10 +173,11 @@ class WebState extends Equatable {
         chooseVideoCmdFlag,
         chooseVideoCmdMessage,
         h5Version,
+        errMsg,
       ];
 }
 
-class WebCubit extends Cubit<WebState> {
+class WebCubit extends Cubit<WebState> with WidgetsBindingObserver {
   late final MessageDispatcher _dispatcher;
   late final WebViewController _controller;
   late final Fluwx _fluwx;
@@ -181,6 +188,9 @@ class WebCubit extends Cubit<WebState> {
   WebViewController get controller => _controller;
 
   WebCubit(super.initialState) {
+    // 添加生命周期观察者
+    WidgetsBinding.instance.addObserver(this);
+
     // 没有登录数据，跳转到登录页面
     if (state.sessionCode == null || state.sessionCode == '') {
       WidgetsBinding.instance.addPostFrameCallback((_) {
@@ -1043,10 +1053,51 @@ class WebCubit extends Cubit<WebState> {
   }
 
   @override
+  Future<void> didChangeAppLifecycleState(AppLifecycleState lifecycleState) async {
+
+    if (lifecycleState == AppLifecycleState.resumed) {
+      // 检测本机Http服务是否运行
+      var localServerService = getIt.get<LocalServerService>();
+      var result = await localServerService.checkServerHealth();
+      if (result) {
+        print('Http服务正常');
+      } else {
+        print('Http服务异常---------------------------------------');
+        emit(state.copyWith(errMsg: '${DateTime.now()}'));
+      }
+    }
+
+    // switch (state) {
+    //   case AppLifecycleState.resumed:
+    //     // 应用从后台回到前台时触发
+    //     print('resumed--------------');
+    //     break;
+    //   case AppLifecycleState.paused:
+    //     // 应用进入后台时触发
+    //     print('paused--------------');
+    //     break;
+    //   case AppLifecycleState.inactive:
+    //     // 应用处于非活跃状态时触发
+    //     print('inactive--------------');
+    //     break;
+    //   case AppLifecycleState.detached:
+    //     // 应用即将退出时触发
+    //     print('detached--------------');
+    //     break;
+    //   case AppLifecycleState.hidden:
+    //     print('hidden--------------');
+    //     break;
+    // }
+  }
+
+  @override
   Future<void> close() async {
     _server?.close();
     // _fluwx.removeSubscriber(_responseListener);
 
+    // 移除观察者
+    WidgetsBinding.instance.removeObserver(this);
+
     await _playerService?.close();
     await _recorderService?.close();
 

lib/services/local_server_service.dart

+import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ -202,4 +203,24 @@ class LocalServerService {
       getIt.get<SharedPreferences>().setString(Constant.h5ShowVersionKey, 'undefined');
     }
   }
+
+  // 检查服务器健康状态
+  Future<bool> checkServerHealth() async {
+    try {
+      final uri = Uri.parse('${Constant.localServerUrl}/package.json');
+      final request = await HttpClient().getUrl(uri);
+      final response = await request.close();
+
+      if (response.statusCode == HttpStatus.ok) {
+        print('本地服务器健康检查: 正常');
+        return true;
+      } else {
+        print('本地服务器健康检查: 异常，状态码 ${response.statusCode}');
+        return false;
+      }
+    } catch (e) {
+      print('本地服务器健康检查: 连接失败 $e');
+      return false;
+    }
+  }
 }

lib/ui/pages/web_page.dart

@@ -138,7 +138,7 @@ class WebPage extends StatelessWidget {
 
   AppBar _buildAppBar(BuildContext ctx, WebState state) {
     return AppBar(
-      title: Text(state.title, style: TextStyle(color: Color(state.titleColor), fontSize: 18)),
+      title: Text(state.title + state.errMsg, style: TextStyle(color: Color(state.titleColor), fontSize: 18)),
       centerTitle: true,
       automaticallyImplyLeading: false,
       backgroundColor: Color(state.bgColor),