refactor : 重构代码

add FileSystemParameters description

Assets/YooAsset/CHANGELOG.md

@@ -2,6 +2,115 @@
 
 All notable changes to this package will be documented in this file.
 
+## [2.3.18] - 2025-12-04
+
+### Fixed
+
+- (#676) 修复了UniTask扩展包的编译报错。
+- (#684) 修复了资源配置窗口Group列表数量过多的时候，添加和删除按钮会变小的问题。
+- (#700) [**严重**] 修复了小游戏扩展库的下载器再失败后重试逻辑不起效的问题。
+
+### Added
+
+- (#683) 新增了内置文件系统类初始化参数：UNPACK_FILE_SYSTEM_ROOT
+
+  ```csharp
+  class FileSystemParametersDefine
+  {
+      // 指定解压文件的根目录
+      public const string UNPACK_FILE_SYSTEM_ROOT = "UNPACK_FILE_SYSTEM_ROOT";
+  }
+  ```
+
+- (#682) 原生文件构建管线新增构建参数：IncludePathInHash
+
+  ```csharp
+  class RawFileBuildParameters : BuildParameters
+  {
+      /// <summary>
+      /// 文件哈希值计算包含路径信息
+      /// </summary>
+      public bool IncludePathInHash = false;
+  }
+  ```
+
+- (#671) 新增扩展工具，可以生成空的包裹内置资源目录文件。
+
+  ```csharp
+  public class CreateEmptyCatalogWindow : EditorWindow
+  ```
+
+- (#694) 新增资源清理方式：ClearBundleFilesByLocations
+
+  ```csharp
+  public enum EFileClearMode
+  {
+      /// <summary>
+      /// 清理指定地址的文件
+      /// 说明：需要指定参数，可选：string, string[], List<string>
+      /// </summary>
+      ClearBundleFilesByLocations,
+  }
+  ```
+
+## [2.3.17] - 2025-10-30
+
+**非常重要**：修复了#627优化导致的资源清单CRC值为空的问题。
+
+该问题会导致下载的损坏文件验证通过。
+
+影响范围：v2.3.15版本，v2.3.16版本。
+
+**非常重要**：(#661) 修复了Package销毁过程中，遇到正在加载的AssetBundle会导致无法卸载的问题。
+
+该问题是偶现，引擎会提示AssetBundle已经加载，无法加载新的文件，导致资源对象加载失败！
+
+影响范围：所有版本！
+
+### Fixed
+
+- (#645) 修复了着色器变种收集工具，在极端情况下变种收集不完整的问题。
+- (#646) 修复了EditorSimulateMode模式下开启模拟下载tag不生效的问题。
+- (#667) 修复了所有编辑器窗口针对中文IME的输入问题。
+- (#670) 修复了Catalog文件生成过程中白名单未考虑自定义清单前缀名。
+
+### Improvements
+
+- 重构并统一了资源清单的反序列化逻辑。
+- (#650) 解决互相依赖的资源包无法卸载的问题。需要开启宏定义：YOOASSET_EXPERIMENTAL
+- (#655) 优化了初始化的时候，缓存文件搜索效率。安卓平台性能提升1倍，IOS平台性能提升3倍。
+
+### Added
+
+- (#643) 新增构建参数，可以节省资源清单运行时内存
+
+  ```csharp
+  class ScriptableBuildParameters
+  {
+      /// <summary>
+      /// 使用可寻址地址代替资源路径
+      /// 说明：开启此项可以节省运行时清单占用的内存！
+      /// </summary>
+      public bool ReplaceAssetPathWithAddress = false;
+  }
+  ```
+
+- (#648) 新增初始化参数，可以自动释放引用计数为零的资源包
+
+  ```csharp
+  class InitializeParameters
+  {
+      /// <summary>
+      /// 当资源引用计数为零的时候自动释放资源包
+      /// </summary>
+      public bool AutoUnloadBundleWhenUnused = false;
+  }
+  ```
+
+### Changed
+
+- 程序集宏定义代码转移到扩展工程。参考MacroSupport文件夹。
+
 ## [2.3.16] - 2025-09-17
 
 ### Improvements

Assets/YooAsset/Editor/AssetArtReporter/AssetArtReporterWindow.cs

@@ -261,14 +261,14 @@ namespace YooAsset.Editor
             catch (System.Exception e)
             {
                 _reportCombiner = null;
-                _titleLabel.text = "导入报告失败！";
+                _titleLabel.text = "Failed to import report!";
                 _descLabel.text = e.Message;
                 UnityEngine.Debug.LogError(e.StackTrace);
             }
         }
         private void FixAllBtn_clicked()
         {
-            if (EditorUtility.DisplayDialog("提示", "修复全部资源（排除白名单和隐藏元素）", "Yes", "No"))
+            if (EditorUtility.DisplayDialog("Info", "Fix all resources (excluding whitelist and hidden elements)", "Yes", "No"))
             {
                 if (_reportCombiner != null)
                     _reportCombiner.FixAll();
@@ -276,7 +276,7 @@ namespace YooAsset.Editor
         }
         private void FixSelectBtn_clicked()
         {
-            if (EditorUtility.DisplayDialog("提示", "修复勾选资源（包含白名单和隐藏元素）", "Yes", "No"))
+            if (EditorUtility.DisplayDialog("Info", "Fix selected resources (including whitelist and hidden elements)", "Yes", "No"))
             {
                 if (_reportCombiner != null)
                     _reportCombiner.FixSelect();
@@ -302,7 +302,7 @@ namespace YooAsset.Editor
         }
         private void ExportFilesBtn_clicked()
         {
-            string selectFolderPath = EditorUtility.OpenFolderPanel("导入所有选中资源", EditorTools.GetProjectPath(), string.Empty);
+            string selectFolderPath = EditorUtility.OpenFolderPanel("Export all selected resources", EditorTools.GetProjectPath(), string.Empty);
             if (string.IsNullOrEmpty(selectFolderPath) == false)
             {
                 if (_reportCombiner != null)

Assets/YooAsset/Editor/AssetArtScanner/AssetArtScannerSetting.cs

@@ -32,17 +32,10 @@ namespace YooAsset.Editor
 
                 // 开始扫描工作
                 ScanReport report = scanner.RunScanner();
-
-                // 检测报告合法性
                 report.CheckError();
 
-                // 保存扫描结果
-                string saveDirectory = scanner.SaveDirectory;
-                if (string.IsNullOrEmpty(saveDirectory))
-                    saveDirectory = "Assets/";
-                string filePath = $"{saveDirectory}/{scanner.ScannerName}_{scanner.ScannerDesc}.json";
-                ScanReportConfig.ExportJsonConfig(filePath, report);
-                return new ScannerResult(filePath, report);
+                // 返回扫描结果
+                return new ScannerResult(report);
             }
             catch (Exception e)
             {

Assets/YooAsset/Editor/AssetArtScanner/AssetArtScannerWindow.cs

@@ -240,7 +240,7 @@ namespace YooAsset.Editor
         }
         private void ScanAllBtn_clicked()
         {
-            if (EditorUtility.DisplayDialog("提示", $"开始全面扫描！", "Yes", "No"))
+            if (EditorUtility.DisplayDialog("Info", $"Start full scan!", "Yes", "No"))
             {
                 string searchKeyWord = _scannerSearchField.value;
                 AssetArtScannerSettingData.ScanAll(searchKeyWord);
@@ -248,7 +248,7 @@ namespace YooAsset.Editor
             }
             else
             {
-                Debug.LogWarning("全面扫描已经取消");
+                Debug.LogWarning("Full scan has been canceled.");
             }
         }
         private void ScanBtn_clicked()

Assets/YooAsset/Editor/AssetArtScanner/ScannerResult.cs

@@ -3,11 +3,6 @@ namespace YooAsset.Editor
 {
     public class ScannerResult
     {
-        /// <summary>
-        /// 生成的报告文件路径
-        /// </summary>
-        public string ReprotFilePath { private set; get; }
-
         /// <summary>
         /// 报告对象
         /// </summary>
@@ -43,11 +38,9 @@ namespace YooAsset.Editor
             ErrorInfo = error;
             ErrorStack = stack;
         }
-        public ScannerResult(string filePath, ScanReport report)
+        public ScannerResult(ScanReport report)
         {
-            ReprotFilePath = filePath;
             Report = report;
-            ErrorInfo = string.Empty;
         }
 
         /// <summary>
@@ -61,5 +54,19 @@ namespace YooAsset.Editor
                 reproterWindow.ImportSingleReprotFile(Report);
             }
         }
+
+        /// <summary>
+        /// 保存报告文件
+        /// </summary>
+        public void SaveReportFile(string saveDirectory)
+        {
+            if (Report == null)
+                throw new System.Exception("Scan report is invalid !");
+
+            if (string.IsNullOrEmpty(saveDirectory))
+                saveDirectory = "Assets/";
+            string filePath = $"{saveDirectory}/{Report.ReportName}_{Report.ReportDesc}.json";
+            ScanReportConfig.ExportJsonConfig(filePath, Report);
+        }
     }
 }

Assets/YooAsset/Editor/AssetBundleBuilder/AssetBundleSimulateBuilder.cs

@@ -19,7 +19,7 @@ namespace YooAsset.Editor
                 buildParameters.BuildOutputRoot = AssetBundleBuilderHelper.GetDefaultBuildOutputRoot();
                 buildParameters.BuildinFileRoot = AssetBundleBuilderHelper.GetStreamingAssetsRoot();
                 buildParameters.BuildPipeline = EBuildPipeline.EditorSimulateBuildPipeline.ToString();
-                buildParameters.BuildBundleType = (int)EBuildBundleType.VirtualBundle;
+                buildParameters.BuildBundleType = (int)EBundleType.VirtualBundle;
                 buildParameters.BuildTarget = EditorUserBuildSettings.activeBuildTarget;
                 buildParameters.PackageName = packageName;
                 buildParameters.PackageVersion = "Simulate";

Assets/YooAsset/Editor/AssetBundleBuilder/BuildBundleInfo.cs

@@ -106,7 +106,27 @@ namespace YooAsset.Editor
         /// </summary>
         public string[] GetAllPackAssetPaths()
         {
-            return AllPackAssets.Select(t => t.AssetInfo.AssetPath).ToArray();
+            List<string> results = new List<string>(AllPackAssets.Count);
+            for (int i = 0; i < AllPackAssets.Count; i++)
+            {
+                var packAsset = AllPackAssets[i];
+                results.Add(packAsset.AssetInfo.AssetPath);
+            }
+            return results.ToArray();
+        }
+
+        /// <summary>
+        /// 获取构建的资源可寻址列表
+        /// </summary>
+        public string[] GetAllPackAssetAddress()
+        {
+            List<string> results = new List<string>(AllPackAssets.Count);
+            for (int i = 0; i < AllPackAssets.Count; i++)
+            {
+                var packAsset = AllPackAssets[i];
+                results.Add(packAsset.Address);
+            }
+            return results.ToArray();
         }
 
         /// <summary>
@@ -153,13 +173,15 @@ namespace YooAsset.Editor
         /// <summary>
         /// 创建AssetBundleBuild类
         /// </summary>
-        public UnityEditor.AssetBundleBuild CreatePipelineBuild()
+        public UnityEditor.AssetBundleBuild CreatePipelineBuild(bool replaceAssetPathWithAddress)
         {
             // 注意：我们不再支持AssetBundle的变种机制
             AssetBundleBuild build = new AssetBundleBuild();
             build.assetBundleName = BundleName;
             build.assetBundleVariant = string.Empty;
             build.assetNames = GetAllPackAssetPaths();
+            if (replaceAssetPathWithAddress)
+                build.addressableNames = GetAllPackAssetAddress();
             return build;
         }
 

Assets/YooAsset/Editor/AssetBundleBuilder/BuildMapContext.cs

@@ -96,12 +96,12 @@ namespace YooAsset.Editor
         /// <summary>
         /// 获取构建管线里需要的数据
         /// </summary>
-        public UnityEditor.AssetBundleBuild[] GetPipelineBuilds()
+        public UnityEditor.AssetBundleBuild[] GetPipelineBuilds(bool replaceAssetPathWithAddres)
         {
             List<UnityEditor.AssetBundleBuild> builds = new List<UnityEditor.AssetBundleBuild>(_bundleInfoDic.Count);
             foreach (var bundleInfo in _bundleInfoDic.Values)
             {
-                builds.Add(bundleInfo.CreatePipelineBuild());
+                builds.Add(bundleInfo.CreatePipelineBuild(replaceAssetPathWithAddres));
             }
             return builds.ToArray();
         }

Assets/YooAsset/Editor/AssetBundleBuilder/BuildParameters.cs

@@ -96,7 +96,7 @@ namespace YooAsset.Editor
         /// <summary>
         /// 资源包加密服务类
         /// </summary>
-        public IEncryptionServices EncryptionServices;
+        public IBundleEncryptionServices EncryptionServices;
 
         /// <summary>
         /// 资源清单加密服务类
@@ -146,7 +146,7 @@ namespace YooAsset.Editor
                 string message = BuildLogger.GetErrorMessage(ErrorCode.BuildPipelineIsNullOrEmpty, "Build pipeline is null or empty !");
                 throw new Exception(message);
             }
-            if (BuildBundleType == (int)EBuildBundleType.Unknown)
+            if (BuildBundleType == (int)EBundleType.Unknown)
             {
                 string message = BuildLogger.GetErrorMessage(ErrorCode.BuildBundleTypeIsUnknown, $"Build bundle type is unknown {BuildBundleType} !");
                 throw new Exception(message);

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BaseTasks/TaskCreateCatalog.cs

@@ -15,7 +15,7 @@ namespace YooAsset.Editor
             string buildinRootDirectory = buildParametersContext.GetBuildinRootDirectory();
             string buildPackageName = buildParametersContext.Parameters.PackageName;
             var manifestServices = buildParametersContext.Parameters.ManifestRestoreServices;
-            CatalogTools.CreateCatalogFile(manifestServices, buildPackageName, buildinRootDirectory);
+            CatalogFileHelper.CreateFile(manifestServices, buildPackageName, buildinRootDirectory);
 
             // 刷新目录
             AssetDatabase.Refresh();

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BaseTasks/TaskCreateManifest.cs

@@ -19,7 +19,7 @@ namespace YooAsset.Editor
         /// <summary>
         /// 创建补丁清单文件到输出目录
         /// </summary>
-        protected void CreateManifestFile(bool processBundleDepends, bool processBundleTags, BuildContext context)
+        protected void CreateManifestFile(bool processBundleDepends, bool processBundleTags, bool replaceAssetPathWithAddress, BuildContext context)
         {
             var buildMapContext = context.GetContextObject<BuildMapContext>();
             var buildParametersContext = context.GetContextObject<BuildParametersContext>();
@@ -31,11 +31,12 @@ namespace YooAsset.Editor
 
             // 创建新补丁清单
             PackageManifest manifest = new PackageManifest();
-            manifest.FileVersion = ManifestDefine.FileVersion;
+            manifest.FileVersion = PackageManifestDefine.FileVersion;
             manifest.EnableAddressable = buildMapContext.Command.EnableAddressable;
             manifest.SupportExtensionless = buildMapContext.Command.SupportExtensionless;
             manifest.LocationToLower = buildMapContext.Command.LocationToLower;
             manifest.IncludeAssetGUID = buildMapContext.Command.IncludeAssetGUID;
+            manifest.ReplaceAssetPathWithAddress = replaceAssetPathWithAddress;
             manifest.OutputNameStyle = (int)buildParameters.FileNameStyle;
             manifest.BuildBundleType = buildParameters.BuildBundleType;
             manifest.BuildPipeline = buildParameters.BuildPipeline;
@@ -58,13 +59,19 @@ namespace YooAsset.Editor
 
             // 4. 处理内置资源包
             if (processBundleDepends)
+            {
+                // 注意：初始化资源清单建立引用关系
+                manifest.Initialize();
+
                 ProcessBuiltinBundleDependency(context, manifest);
+            }
+
 
             // 创建资源清单文本文件
             {
                 string fileName = YooAssetSettingsData.GetManifestJsonFileName(buildParameters.PackageName, buildParameters.PackageVersion);
                 string filePath = $"{packageOutputDirectory}/{fileName}";
-                ManifestTools.SerializeToJson(filePath, manifest);
+                PackageManifestTools.SerializeToJson(filePath, manifest);
                 BuildLogger.Log($"Create package manifest file: {filePath}");
             }
 
@@ -74,7 +81,7 @@ namespace YooAsset.Editor
             {
                 string fileName = YooAssetSettingsData.GetManifestBinaryFileName(buildParameters.PackageName, buildParameters.PackageVersion);
                 packagePath = $"{packageOutputDirectory}/{fileName}";
-                ManifestTools.SerializeToBinary(packagePath, manifest, buildParameters.ManifestProcessServices);
+                PackageManifestTools.SerializeToBinary(packagePath, manifest, buildParameters.ManifestProcessServices);
                 packageHash = HashUtility.FileCRC32(packagePath);
                 BuildLogger.Log($"Create package manifest file: {packagePath}");
             }
@@ -99,7 +106,7 @@ namespace YooAsset.Editor
             {
                 ManifestContext manifestContext = new ManifestContext();
                 byte[] bytesData = FileUtility.ReadAllBytes(packagePath);
-                manifestContext.Manifest = ManifestTools.DeserializeFromBinary(bytesData, buildParameters.ManifestRestoreServices);
+                manifestContext.Manifest = PackageManifestTools.DeserializeFromBinary(bytesData, buildParameters.ManifestRestoreServices);
                 context.SetContextObject(manifestContext);
             }
         }
@@ -302,9 +309,6 @@ namespace YooAsset.Editor
         #region YOOASSET_LEGACY_DEPENDENCY
         private void ProcessBuiltinBundleDependency(BuildContext context, PackageManifest manifest)
         {
-            // 注意：初始化资源清单建立引用关系
-            ManifestTools.InitManifest(manifest);
-
             // 注意：如果是可编程构建管线，需要补充内置资源包
             // 注意：该步骤依赖前面的操作！
             var buildResultContext = context.TryGetContextObject<TaskBuilding_SBP.BuildResultContext>();

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BaseTasks/TaskCreateReport.cs

@@ -54,6 +54,7 @@ namespace YooAsset.Editor
                     buildReport.Summary.CompressOption = builtinBuildParameters.CompressOption;
                     buildReport.Summary.DisableWriteTypeTree = builtinBuildParameters.DisableWriteTypeTree;
                     buildReport.Summary.IgnoreTypeTreeChanges = builtinBuildParameters.IgnoreTypeTreeChanges;
+                    buildReport.Summary.ReplaceAssetPathWithAddress = builtinBuildParameters.ReplaceAssetPathWithAddress;
                 }
                 else if (buildParameters is ScriptableBuildParameters)
                 {
@@ -61,6 +62,7 @@ namespace YooAsset.Editor
                     buildReport.Summary.CompressOption = scriptableBuildParameters.CompressOption;
                     buildReport.Summary.DisableWriteTypeTree = scriptableBuildParameters.DisableWriteTypeTree;
                     buildReport.Summary.IgnoreTypeTreeChanges = scriptableBuildParameters.IgnoreTypeTreeChanges;
+                    buildReport.Summary.ReplaceAssetPathWithAddress = scriptableBuildParameters.ReplaceAssetPathWithAddress;
                     buildReport.Summary.WriteLinkXML = scriptableBuildParameters.WriteLinkXML;
                     buildReport.Summary.CacheServerHost = scriptableBuildParameters.CacheServerHost;
                     buildReport.Summary.CacheServerPort = scriptableBuildParameters.CacheServerPort;

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BaseTasks/TaskEncryption.cs

@@ -24,7 +24,7 @@ namespace YooAsset.Editor
             string pipelineOutputDirectory = buildParametersContext.GetPipelineOutputDirectory();
             foreach (var bundleInfo in buildMapContext.Collection)
             {
-                EncryptFileInfo fileInfo = new EncryptFileInfo();
+                EncryptBundleInfo fileInfo = new EncryptBundleInfo();
                 fileInfo.BundleName = bundleInfo.BundleName;
                 fileInfo.FileLoadPath = $"{pipelineOutputDirectory}/{bundleInfo.BundleName}";
                 var encryptResult = encryptionServices.Encrypt(fileInfo);

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BaseTasks/TaskUpdateBundleInfo.cs

@@ -44,9 +44,9 @@ namespace YooAsset.Editor
             {
                 bundleInfo.PackageUnityHash = GetUnityHash(bundleInfo, context);
                 bundleInfo.PackageUnityCRC = GetUnityCRC(bundleInfo, context);
-                bundleInfo.PackageFileHash = GetBundleFileHash(bundleInfo, buildParametersContext);
-                bundleInfo.PackageFileCRC = GetBundleFileCRC(bundleInfo, buildParametersContext);
-                bundleInfo.PackageFileSize = GetBundleFileSize(bundleInfo, buildParametersContext);
+                bundleInfo.PackageFileHash = GetBundleFileHash(bundleInfo, context);
+                bundleInfo.PackageFileCRC = GetBundleFileCRC(bundleInfo, context);
+                bundleInfo.PackageFileSize = GetBundleFileSize(bundleInfo, context);
             }
 
             // 4.更新补丁包输出的文件路径
@@ -54,16 +54,16 @@ namespace YooAsset.Editor
             {
                 string bundleName = bundleInfo.BundleName;
                 string fileHash = bundleInfo.PackageFileHash;
-                string fileExtension = ManifestTools.GetRemoteBundleFileExtension(bundleName);
-                string fileName = ManifestTools.GetRemoteBundleFileName(outputNameStyle, bundleName, fileExtension, fileHash);
+                string fileExtension = PackageManifestTools.GetRemoteBundleFileExtension(bundleName);
+                string fileName = PackageManifestTools.GetRemoteBundleFileName(outputNameStyle, bundleName, fileExtension, fileHash);
                 bundleInfo.PackageDestFilePath = $"{packageOutputDirectory}/{fileName}";
             }
         }
 
         protected abstract string GetUnityHash(BuildBundleInfo bundleInfo, BuildContext context);
         protected abstract uint GetUnityCRC(BuildBundleInfo bundleInfo, BuildContext context);
-        protected abstract string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext);
-        protected abstract uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext);
-        protected abstract long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext);
+        protected abstract string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildContext context);
+        protected abstract uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildContext context);
+        protected abstract long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildContext context);
     }
 }

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BuiltinBuildPipeline/BuildTasks/TaskBuilding_BBP.cs

@@ -23,7 +23,8 @@ namespace YooAsset.Editor
             // 开始构建
             string pipelineOutputDirectory = buildParametersContext.GetPipelineOutputDirectory();
             BuildAssetBundleOptions buildOptions = builtinBuildParameters.GetBundleBuildOptions();
-            AssetBundleManifest unityManifest = BuildPipeline.BuildAssetBundles(pipelineOutputDirectory, buildMapContext.GetPipelineBuilds(), buildOptions, buildParametersContext.Parameters.BuildTarget);
+            var bundleBuilds = buildMapContext.GetPipelineBuilds(builtinBuildParameters.ReplaceAssetPathWithAddress);
+            AssetBundleManifest unityManifest = BuildPipeline.BuildAssetBundles(pipelineOutputDirectory, bundleBuilds, buildOptions, buildParametersContext.Parameters.BuildTarget);
             if (unityManifest == null)
             {
                 string message = BuildLogger.GetErrorMessage(ErrorCode.UnityEngineBuildFailed, "UnityEngine build failed !");

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BuiltinBuildPipeline/BuildTasks/TaskCreateManifest_BBP.cs

@@ -11,7 +11,10 @@ namespace YooAsset.Editor
 
         void IBuildTask.Run(BuildContext context)
         {
-            CreateManifestFile(true, true, context);
+            var buildParametersContext = context.GetContextObject<BuildParametersContext>();
+            var builtinBuildParameters = buildParametersContext.Parameters as BuiltinBuildParameters;
+            bool replaceAssetPathWithAddress = builtinBuildParameters.ReplaceAssetPathWithAddress;
+            CreateManifestFile(true, true, replaceAssetPathWithAddress, context);
         }
 
         protected override string[] GetBundleDepends(BuildContext context, string bundleName)

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BuiltinBuildPipeline/BuildTasks/TaskUpdateBundleInfo_BBP.cs

@@ -40,17 +40,17 @@ namespace YooAsset.Editor
                 throw new Exception(message);
             }
         }
-        protected override string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return HashUtility.FileMD5(filePath);
         }
-        protected override uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return HashUtility.FileCRC32Value(filePath);
         }
-        protected override long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return FileUtility.GetFileSize(filePath);

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/BuiltinBuildPipeline/BuiltinBuildParameters.cs

@@ -27,6 +27,12 @@ namespace YooAsset.Editor
         /// </summary>
         public bool IgnoreTypeTreeChanges = true;
 
+        /// <summary>
+        /// 使用可寻址地址代替资源路径
+        /// 说明：开启此项可以节省运行时清单占用的内存！
+        /// </summary>
+        public bool ReplaceAssetPathWithAddress = false;
+
 
         /// <summary>
         /// 获取内置构建管线的构建选项

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/EditorSimulateBuildPipeline/BuildTasks/TaskCreateManifest_ESBP.cs

@@ -7,7 +7,7 @@ namespace YooAsset.Editor
     {
         void IBuildTask.Run(BuildContext context)
         {
-            CreateManifestFile(false, false, context);
+            CreateManifestFile(false, true, false, context);
         }
 
         protected override string[] GetBundleDepends(BuildContext context, string bundleName)

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/EditorSimulateBuildPipeline/BuildTasks/TaskUpdateBundleInfo_ESBP.cs

@@ -19,16 +19,16 @@ namespace YooAsset.Editor
         {
             return 0;
         }
-        protected override string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return GetFilePathTempHash(filePath);
         }
-        protected override uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildContext context)
         {
             return 0;
         }
-        protected override long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildContext context)
         {
             return GetBundleTempSize(bundleInfo);
         }

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/RawFileBuildPipeline/BuildTasks/TaskCreateManifest_RFBP.cs

@@ -9,7 +9,7 @@ namespace YooAsset.Editor
     {
         void IBuildTask.Run(BuildContext context)
         {
-            CreateManifestFile(false, true, context);
+            CreateManifestFile(false, true, false, context);
         }
 
         protected override string[] GetBundleDepends(BuildContext context, string bundleName)

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/RawFileBuildPipeline/BuildTasks/TaskUpdateBundleInfo_RFBP.cs

@@ -15,27 +15,55 @@ namespace YooAsset.Editor
 
         protected override string GetUnityHash(BuildBundleInfo bundleInfo, BuildContext context)
         {
-            string filePath = bundleInfo.PackageSourceFilePath;
-            return HashUtility.FileMD5(filePath);
+            var buildParametersContext = context.GetContextObject<BuildParametersContext>();
+            var rawFileBuildParameters = buildParametersContext.Parameters as RawFileBuildParameters;
+            if (rawFileBuildParameters.IncludePathInHash)
+            {
+                string filePath = bundleInfo.PackageSourceFilePath;
+                return GetFileMD5IncludePath(filePath);
+            }
+            else
+            {
+                string filePath = bundleInfo.PackageSourceFilePath;
+                return HashUtility.FileMD5(filePath);
+            }
         }
         protected override uint GetUnityCRC(BuildBundleInfo bundleInfo, BuildContext context)
         {
             return 0;
         }
-        protected override string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildContext context)
         {
-            string filePath = bundleInfo.PackageSourceFilePath;
-            return HashUtility.FileMD5(filePath);
+            var buildParametersContext = context.GetContextObject<BuildParametersContext>();
+            var rawFileBuildParameters = buildParametersContext.Parameters as RawFileBuildParameters;
+            if (rawFileBuildParameters.IncludePathInHash)
+            {
+                string filePath = bundleInfo.PackageSourceFilePath;
+                return GetFileMD5IncludePath(filePath);
+            }
+            else
+            {
+                string filePath = bundleInfo.PackageSourceFilePath;
+                return HashUtility.FileMD5(filePath);
+            }
         }
-        protected override uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return HashUtility.FileCRC32Value(filePath);
         }
-        protected override long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return FileUtility.GetFileSize(filePath);
         }
+
+        private string GetFileMD5IncludePath(string filePath)
+        {
+            string pathHash = HashUtility.StringMD5(filePath.ToLowerInvariant());
+            string contentHash = HashUtility.FileMD5(filePath);
+            string combined = pathHash + contentHash;
+            return HashUtility.StringMD5(combined);
+        }
     }
 }

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/RawFileBuildPipeline/RawFileBuildParameters.cs

@@ -6,5 +6,9 @@ namespace YooAsset.Editor
 {
     public class RawFileBuildParameters : BuildParameters
     {
+        /// <summary>
+        /// 文件哈希值计算包含路径信息
+        /// </summary>
+        public bool IncludePathInHash = false;
     }
 }

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/ScriptableBuildPipeline/BuildTasks/TaskBuilding_SBP.cs

@@ -24,7 +24,8 @@ namespace YooAsset.Editor
             var scriptableBuildParameters = buildParametersContext.Parameters as ScriptableBuildParameters;
 
             // 构建内容
-            var buildContent = new BundleBuildContent(buildMapContext.GetPipelineBuilds());
+            var bundleBuilds = buildMapContext.GetPipelineBuilds(scriptableBuildParameters.ReplaceAssetPathWithAddress);
+            var buildContent = new BundleBuildContent(bundleBuilds);
 
             // 开始构建
             IBundleBuildResults buildResults;

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/ScriptableBuildPipeline/BuildTasks/TaskCreateManifest_SBP.cs

@@ -13,7 +13,10 @@ namespace YooAsset.Editor
 
         void IBuildTask.Run(BuildContext context)
         {
-            CreateManifestFile(true, true, context);
+            var buildParametersContext = context.GetContextObject<BuildParametersContext>();
+            var scriptableBuildParameters = buildParametersContext.Parameters as ScriptableBuildParameters;
+            bool replaceAssetPathWithAddress = scriptableBuildParameters.ReplaceAssetPathWithAddress;
+            CreateManifestFile(true, true, replaceAssetPathWithAddress, context);
         }
 
         protected override string[] GetBundleDepends(BuildContext context, string bundleName)

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/ScriptableBuildPipeline/BuildTasks/TaskUpdateBundleInfo_SBP.cs

@@ -40,17 +40,17 @@ namespace YooAsset.Editor
                 throw new Exception(message);
             }
         }
-        protected override string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override string GetBundleFileHash(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return HashUtility.FileMD5(filePath);
         }
-        protected override uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override uint GetBundleFileCRC(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return HashUtility.FileCRC32Value(filePath);
         }
-        protected override long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildParametersContext buildParametersContext)
+        protected override long GetBundleFileSize(BuildBundleInfo bundleInfo, BuildContext context)
         {
             string filePath = bundleInfo.PackageSourceFilePath;
             return FileUtility.GetFileSize(filePath);

Assets/YooAsset/Editor/AssetBundleBuilder/BuildPipeline/ScriptableBuildPipeline/ScriptableBuildParameters.cs

@@ -29,6 +29,12 @@ namespace YooAsset.Editor
         /// </summary>
         public bool IgnoreTypeTreeChanges = true;
 
+        /// <summary>
+        /// 使用可寻址地址代替资源路径
+        /// 说明：开启此项可以节省运行时清单占用的内存！
+        /// </summary>
+        public bool ReplaceAssetPathWithAddress = false;
+
         /// <summary>
         /// 自动建立资源对象对图集的依赖关系
         /// </summary>

Assets/YooAsset/Editor/AssetBundleBuilder/DefaultEncryptionServices.cs

@@ -1,9 +1,9 @@
 
 namespace YooAsset.Editor
 {
-    public class EncryptionNone : IEncryptionServices
+    public class EncryptionNone : IBundleEncryptionServices
     {
-        public EncryptResult Encrypt(EncryptFileInfo fileInfo)
+        public EncryptResult Encrypt(EncryptBundleInfo fileInfo)
         {
             throw new System.NotImplementedException();
         }

Assets/YooAsset/Editor/AssetBundleBuilder/VisualViewers/BuildPipelineViewerBase.cs

@@ -46,13 +46,13 @@ namespace YooAsset.Editor
         /// <summary>
         /// 创建资源包加密服务类实例
         /// </summary>
-        protected IEncryptionServices CreateEncryptionServicesInstance()
+        protected IBundleEncryptionServices CreateEncryptionServicesInstance()
         {
             var className = AssetBundleBuilderSetting.GetPackageEncyptionServicesClassName(PackageName, PipelineName);
-            var classTypes = EditorTools.GetAssignableTypes(typeof(IEncryptionServices));
+            var classTypes = EditorTools.GetAssignableTypes(typeof(IBundleEncryptionServices));
             var classType = classTypes.Find(x => x.FullName.Equals(className));
             if (classType != null)
-                return (IEncryptionServices)Activator.CreateInstance(classType);
+                return (IBundleEncryptionServices)Activator.CreateInstance(classType);
             else
                 return null;
         }
@@ -184,7 +184,7 @@ namespace YooAsset.Editor
         protected PopupField<Type> CreateEncryptionServicesField(VisualElement container)
         {
             // 资源包加密服务类
-            var classTypes = EditorTools.GetAssignableTypes(typeof(IEncryptionServices));
+            var classTypes = EditorTools.GetAssignableTypes(typeof(IBundleEncryptionServices));
             if (classTypes.Count > 0)
             {
                 var className = AssetBundleBuilderSetting.GetPackageEncyptionServicesClassName(PackageName, PipelineName);

Assets/YooAsset/Editor/AssetBundleBuilder/VisualViewers/BuiltinBuildPipeline/BuiltinBuildPipelineViewer.cs

@@ -82,14 +82,14 @@ namespace YooAsset.Editor
         }
         private void BuildButton_clicked()
         {
-            if (EditorUtility.DisplayDialog("提示", $"开始构建资源包[{PackageName}]！", "Yes", "No"))
+            if (EditorUtility.DisplayDialog("Info", $"Start building resource package [{PackageName}]!", "Yes", "No"))
             {
                 EditorTools.ClearUnityConsole();
                 EditorApplication.delayCall += ExecuteBuild;
             }
             else
             {
-                Debug.LogWarning("[Build] 打包已经取消");
+                Debug.LogWarning("[Build] Packaging has been canceled.");
             }
         }
 
@@ -109,7 +109,7 @@ namespace YooAsset.Editor
             buildParameters.BuildOutputRoot = AssetBundleBuilderHelper.GetDefaultBuildOutputRoot();
             buildParameters.BuildinFileRoot = AssetBundleBuilderHelper.GetStreamingAssetsRoot();
             buildParameters.BuildPipeline = PipelineName.ToString();
-            buildParameters.BuildBundleType = (int)EBuildBundleType.AssetBundle;
+            buildParameters.BuildBundleType = (int)EBundleType.AssetBundle;
             buildParameters.BuildTarget = BuildTarget;
             buildParameters.PackageName = PackageName;
             buildParameters.PackageVersion = _buildVersionField.value;

Assets/YooAsset/Editor/AssetBundleBuilder/VisualViewers/EditorSimulateBuildpipeline/EditorSimulateBuildPipelineViewer.cs

@@ -42,14 +42,14 @@ namespace YooAsset.Editor
         }
         private void BuildButton_clicked()
         {
-            if (EditorUtility.DisplayDialog("提示", $"开始构建资源包[{PackageName}]！", "Yes", "No"))
+            if (EditorUtility.DisplayDialog("Info", $"Start building resource package [{PackageName}]!", "Yes", "No"))
             {
                 EditorTools.ClearUnityConsole();
                 EditorApplication.delayCall += ExecuteBuild;
             }
             else
             {
-                Debug.LogWarning("[Build] 打包已经取消");
+                Debug.LogWarning("[Build] Packaging has been canceled.");
             }
         }
 
@@ -66,7 +66,7 @@ namespace YooAsset.Editor
             buildParameters.BuildOutputRoot = AssetBundleBuilderHelper.GetDefaultBuildOutputRoot();
             buildParameters.BuildinFileRoot = AssetBundleBuilderHelper.GetStreamingAssetsRoot();
             buildParameters.BuildPipeline = PipelineName.ToString();
-            buildParameters.BuildBundleType = (int)EBuildBundleType.VirtualBundle;
+            buildParameters.BuildBundleType = (int)EBundleType.VirtualBundle;
             buildParameters.BuildTarget = BuildTarget;
             buildParameters.PackageName = PackageName;
             buildParameters.PackageVersion = _buildVersionField.value;

Assets/YooAsset/Editor/AssetBundleBuilder/VisualViewers/RawfileBuildpipeline/RawfileBuildPipelineViewer.cs

@@ -77,14 +77,14 @@ namespace YooAsset.Editor
         }
         private void BuildButton_clicked()
         {
-            if (EditorUtility.DisplayDialog("提示", $"开始构建资源包[{PackageName}]！", "Yes", "No"))
+            if (EditorUtility.DisplayDialog("Info", $"Start building resource package [{PackageName}]!", "Yes", "No"))
             {
                 EditorTools.ClearUnityConsole();
                 EditorApplication.delayCall += ExecuteBuild;
             }
             else
             {
-                Debug.LogWarning("[Build] 打包已经取消");
+                Debug.LogWarning("[Build] Packaging has been canceled.");
             }
         }
 
@@ -103,7 +103,7 @@ namespace YooAsset.Editor
             buildParameters.BuildOutputRoot = AssetBundleBuilderHelper.GetDefaultBuildOutputRoot();
             buildParameters.BuildinFileRoot = AssetBundleBuilderHelper.GetStreamingAssetsRoot();
             buildParameters.BuildPipeline = PipelineName.ToString();
-            buildParameters.BuildBundleType = (int)EBuildBundleType.RawBundle;
+            buildParameters.BuildBundleType = (int)EBundleType.RawBundle;
             buildParameters.BuildTarget = BuildTarget;
             buildParameters.PackageName = PackageName;
             buildParameters.PackageVersion = _buildVersionField.value;

Assets/YooAsset/Editor/AssetBundleBuilder/VisualViewers/ScriptableBuildPipeline/ScriptableBuildPipelineViewer.cs

@@ -82,14 +82,14 @@ namespace YooAsset.Editor
         }
         private void BuildButton_clicked()
         {
-            if (EditorUtility.DisplayDialog("提示", $"开始构建资源包[{PackageName}]！", "Yes", "No"))
+            if (EditorUtility.DisplayDialog("Info", $"Start building resource package [{PackageName}]!", "Yes", "No"))
             {
                 EditorTools.ClearUnityConsole();
                 EditorApplication.delayCall += ExecuteBuild;
             }
             else
             {
-                Debug.LogWarning("[Build] 打包已经取消");
+                Debug.LogWarning("[Build] Packaging has been canceled.");
             }
         }
 
@@ -109,7 +109,7 @@ namespace YooAsset.Editor
             buildParameters.BuildOutputRoot = AssetBundleBuilderHelper.GetDefaultBuildOutputRoot();
             buildParameters.BuildinFileRoot = AssetBundleBuilderHelper.GetStreamingAssetsRoot();
             buildParameters.BuildPipeline = PipelineName.ToString();
-            buildParameters.BuildBundleType = (int)EBuildBundleType.AssetBundle;
+            buildParameters.BuildBundleType = (int)EBundleType.AssetBundle;
             buildParameters.BuildTarget = BuildTarget;
             buildParameters.PackageName = PackageName;
             buildParameters.PackageVersion = _buildVersionField.value;

Assets/YooAsset/Editor/AssetBundleCollector/AssetBundleCollectorWindow.cs

@@ -236,6 +236,7 @@ namespace YooAsset.Editor
 
                 // 包裹名称
                 _packageNameTxt = root.Q<TextField>("PackageName");
+                _packageNameTxt.isDelayed = true;
                 _packageNameTxt.RegisterValueChangedCallback(evt =>
                 {
                     var selectPackage = _packageListView.selectedItem as AssetBundleCollectorPackage;
@@ -249,6 +250,7 @@ namespace YooAsset.Editor
 
                 // 包裹备注
                 _packageDescTxt = root.Q<TextField>("PackageDesc");
+                _packageDescTxt.isDelayed = true;
                 _packageDescTxt.RegisterValueChangedCallback(evt =>
                 {
                     var selectPackage = _packageListView.selectedItem as AssetBundleCollectorPackage;
@@ -286,6 +288,7 @@ namespace YooAsset.Editor
 
                 // 分组名称
                 _groupNameTxt = root.Q<TextField>("GroupName");
+                _groupNameTxt.isDelayed = true;
                 _groupNameTxt.RegisterValueChangedCallback(evt =>
                 {
                     var selectPackage = _packageListView.selectedItem as AssetBundleCollectorPackage;
@@ -300,6 +303,7 @@ namespace YooAsset.Editor
 
                 // 分组备注
                 _groupDescTxt = root.Q<TextField>("GroupDesc");
+                _groupDescTxt.isDelayed = true;
                 _groupDescTxt.RegisterValueChangedCallback(evt =>
                 {
                     var selectPackage = _packageListView.selectedItem as AssetBundleCollectorPackage;
@@ -314,6 +318,7 @@ namespace YooAsset.Editor
 
                 // 分组的资源标签
                 _groupTagsTxt = root.Q<TextField>("GroupTags");
+                _groupTagsTxt.isDelayed = true;
                 _groupTagsTxt.RegisterValueChangedCallback(evt =>
                 {
                     var selectPackage = _packageListView.selectedItem as AssetBundleCollectorPackage;
@@ -817,6 +822,7 @@ namespace YooAsset.Editor
                 var textField = new TextField();
                 textField.name = "TextField0";
                 textField.label = "User Data";
+                textField.isDelayed = true;
                 textField.style.width = 200;
                 elementBottom.Add(textField);
                 var label = textField.Q<Label>();
@@ -826,6 +832,7 @@ namespace YooAsset.Editor
                 var textField = new TextField();
                 textField.name = "TextField1";
                 textField.label = "Asset Tags";
+                textField.isDelayed = true;
                 textField.style.width = 100;
                 textField.style.marginLeft = 20;
                 textField.style.flexGrow = 1;

Assets/YooAsset/Editor/AssetBundleCollector/AssetBundleCollectorWindow.uxml

@@ -30,7 +30,7 @@
         <ui:VisualElement name="PackageContainer" style="width: 200px; flex-grow: 0; background-color: rgb(67, 67, 67); border-left-width: 5px; border-right-width: 5px; border-top-width: 5px; border-bottom-width: 5px;">
             <ui:Label text="Packages" display-tooltip-when-elided="true" name="PackageTitle" style="background-color: rgb(89, 89, 89); -unity-text-align: upper-center; -unity-font-style: bold; border-left-width: 5px; border-right-width: 5px; border-top-width: 5px; border-bottom-width: 5px; font-size: 12px;" />
             <ui:ListView focusable="true" name="PackageListView" item-height="20" virtualization-method="DynamicHeight" reorderable="true" reorder-mode="Animated" style="flex-grow: 1;" />
-            <ui:VisualElement name="PackageAddContainer" style="height: 20px; flex-direction: row; justify-content: center;">
+            <ui:VisualElement name="PackageAddContainer" style="height: 20px; flex-direction: row; justify-content: center; flex-shrink: 0;">
                 <ui:Button text=" - " display-tooltip-when-elided="true" name="RemoveBtn" />
                 <ui:Button text=" + " display-tooltip-when-elided="true" name="AddBtn" />
             </ui:VisualElement>
@@ -40,7 +40,7 @@
             <ui:TextField picking-mode="Ignore" label="Package Name" name="PackageName" style="flex-direction: column;" />
             <ui:TextField picking-mode="Ignore" label="Package Desc" name="PackageDesc" style="flex-direction: column;" />
             <ui:ListView focusable="true" name="GroupListView" item-height="20" virtualization-method="DynamicHeight" reorderable="true" reorder-mode="Animated" style="flex-grow: 1;" />
-            <ui:VisualElement name="GroupAddContainer" style="height: 20px; flex-direction: row; justify-content: center;">
+            <ui:VisualElement name="GroupAddContainer" style="height: 20px; flex-direction: row; justify-content: center; flex-shrink: 0;">
                 <ui:Button text=" - " display-tooltip-when-elided="true" name="RemoveBtn" />
                 <ui:Button text=" + " display-tooltip-when-elided="true" name="AddBtn" />
             </ui:VisualElement>

Assets/YooAsset/Editor/AssetBundleCollector/AssetDependencyDatabase.cs

@@ -88,8 +88,8 @@ namespace YooAsset.Editor
             }
             catch (Exception ex)
             {
-                ClearDatabase(true);
                 Debug.LogError($"Failed to load cache database : {ex.Message}");
+                ClearDatabase(true);
             }
             finally
             {
@@ -169,7 +169,8 @@ namespace YooAsset.Editor
                     File.Delete(_databaseFilePath);
             }
 
-            _database.Clear();
+            if (_database != null)
+                _database.Clear();
         }
 
         /// <summary>

Assets/YooAsset/Editor/AssetBundleReporter/ReportSummary.cs

@@ -81,6 +81,7 @@ namespace YooAsset.Editor
         public ECompressOption CompressOption;
         public bool DisableWriteTypeTree;
         public bool IgnoreTypeTreeChanges;
+        public bool ReplaceAssetPathWithAddress;
         public bool WriteLinkXML = true;
         public string CacheServerHost;
         public int CacheServerPort;

Assets/YooAsset/Editor/AssetBundleReporter/VisualViewers/ReporterAssetListViewer.cs

@@ -277,7 +277,7 @@ namespace YooAsset.Editor
             if (dependTableData.BundleInfo.Encrypted)
                 return;
 
-            if (_buildReport.Summary.BuildBundleType == (int)EBuildBundleType.AssetBundle)
+            if (_buildReport.Summary.BuildBundleType == (int)EBundleType.AssetBundle)
             {
                 string rootDirectory = Path.GetDirectoryName(_reportFilePath);
                 string filePath = $"{rootDirectory}/{dependTableData.BundleInfo.FileName}";

Assets/YooAsset/Editor/AssetBundleReporter/VisualViewers/ReporterBundleListViewer.cs

@@ -348,7 +348,7 @@ namespace YooAsset.Editor
             if (bundleTableData.BundleInfo.Encrypted)
                 return;
 
-            if (_buildReport.Summary.BuildBundleType == (int)EBuildBundleType.AssetBundle)
+            if (_buildReport.Summary.BuildBundleType == (int)EBundleType.AssetBundle)
             {
                 string rootDirectory = Path.GetDirectoryName(_reportFilePath);
                 string filePath = $"{rootDirectory}/{bundleTableData.BundleInfo.FileName}";

Assets/YooAsset/Editor/AssetBundleReporter/VisualViewers/ReporterSummaryViewer.cs

@@ -74,6 +74,7 @@ namespace YooAsset.Editor
             BindListViewItem("CompressOption", $"{buildReport.Summary.CompressOption}");
             BindListViewItem("DisableWriteTypeTree", $"{buildReport.Summary.DisableWriteTypeTree}");
             BindListViewItem("IgnoreTypeTreeChanges", $"{buildReport.Summary.IgnoreTypeTreeChanges}");
+            BindListViewItem("ReplaceAssetPathWithAddress", $"{buildReport.Summary.ReplaceAssetPathWithAddress}");
             BindListViewItem(string.Empty, string.Empty);
 
             BindListViewHeader("Build Results");

Assets/YooAsset/Editor/EditorDefine.cs

@@ -41,6 +41,8 @@ namespace YooAsset.Editor
         Texture,
         RenderTexture,
         VideoClip,
+        PlayableAsset,
+        TimelineAsset
     }
 
     /// <summary>

Assets/YooAsset/Runtime/DiagnosticSystem/README.md

@@ -0,0 +1,945 @@
+# DiagnosticSystem 诊断系统
+
+## 模块概述
+
+DiagnosticSystem 是 YooAsset 的**远程调试诊断系统**，提供运行时资源管理状态的实时可视化和性能分析能力。该系统通过编辑器窗口与运行时游戏进行双向通信，实时采集和展示资源加载、Bundle 管理、异步操作等调试信息。
+
+### 核心特性
+
+- **实时远程调试**：在 Unity 编辑器中查看游戏运行时的资源管理状态
+- **完整状态快照**：采集所有资源、Bundle、异步操作的实时信息
+- **历史数据回溯**：缓存最近 500 帧数据，支持时间回溯分析
+- **双模式采样**：支持单次采样和自动连续采样
+- **低性能开销**：按需采样，无需连续监控
+
+### 模块统计
+
+| 组件 | 职责 |
+|------|------|
+| 核心通信 | RemoteDebuggerInRuntime + 双连接层 |
+| 数据结构 | 5 个调试信息结构体 |
+| 命令系统 | RemoteCommand 命令定义 |
+| **总计** | 10 个核心文件，完整的远程诊断框架 |
+
+---
+
+## 设计目标
+
+| 目标 | 说明 |
+|------|------|
+| **实时可视化** | 在编辑器中实时查看运行时资源状态 |
+| **性能监控** | 收集加载耗时、引用计数、下载进度等性能指标 |
+| **内存诊断** | 追踪资源出生场景、引用计数，识别潜在内存泄漏 |
+| **操作追踪** | 显示异步操作树，包括嵌套和依赖关系 |
+| **低开销设计** | 按需采样而非连续监控，DEBUG 模式自动启用 |
+
+---
+
+## 文件结构
+
+```
+DiagnosticSystem/
+├── RemoteDebuggerDefine.cs        # 全局定义和常量
+├── RemoteCommand.cs                # 命令定义和序列化
+├── DebugReport.cs                  # 调试报告（顶层容器）
+├── DebugPackageData.cs             # 包级调试数据
+├── DebugProviderInfo.cs            # 资源加载器调试信息
+├── DebugBundleInfo.cs              # 资源包调试信息
+├── DebugOperationInfo.cs           # 异步操作调试信息
+├── RemoteDebuggerInRuntime.cs      # 运行时调试器主类
+├── RemotePlayerConnection.cs       # 编辑器模拟连接层
+└── RemoteEditorConnection.cs       # 运行时模拟连接层
+```
+
+---
+
+## 核心类说明
+
+### RemoteDebuggerDefine
+
+全局定义类，包含调试器版本和通信协议的 GUID 标识符。
+
+```csharp
+internal class RemoteDebuggerDefine
+{
+    // 调试器版本（用于版本校验）
+    public const string DebuggerVersion = "2.3.3";
+
+    // 消息标识符（GUID）
+    public static readonly Guid kMsgPlayerSendToEditor =
+        new Guid("e34a5702dd353724aa315fb8011f08c3");  // 运行时→编辑器
+
+    public static readonly Guid kMsgEditorSendToPlayer =
+        new Guid("4d1926c9df5b052469a1c63448b7609a");  // 编辑器→运行时
+}
+```
+
+### RemoteCommand
+
+命令定义类，用于编辑器向运行时发送采样指令。
+
+```csharp
+internal enum ERemoteCommand
+{
+    SampleOnce = 0,  // 单次采样
+    SampleAuto = 1,  // 自动采样（连续）
+}
+
+[Serializable]
+internal class RemoteCommand
+{
+    public int CommandType;      // ERemoteCommand 枚举值
+    public string CommandParam;  // 命令参数
+
+    // 序列化/反序列化（JSON 格式）
+    public static byte[] Serialize(RemoteCommand command)
+    {
+        return Encoding.UTF8.GetBytes(JsonUtility.ToJson(command));
+    }
+
+    public static RemoteCommand Deserialize(byte[] data)
+    {
+        return JsonUtility.FromJson<RemoteCommand>(Encoding.UTF8.GetString(data));
+    }
+}
+```
+
+**命令示例：**
+
+```json
+// 单次采样
+{
+  "CommandType": 0,
+  "CommandParam": ""
+}
+
+// 开启自动采样
+{
+  "CommandType": 1,
+  "CommandParam": "open"
+}
+
+// 关闭自动采样
+{
+  "CommandType": 1,
+  "CommandParam": "close"
+}
+```
+
+### DebugReport
+
+调试报告容器，包含完整的系统状态快照。
+
+```csharp
+[Serializable]
+internal class DebugReport
+{
+    // 调试器版本（用于版本校验）
+    public string DebuggerVersion = RemoteDebuggerDefine.DebuggerVersion;
+
+    // 游戏帧数
+    public int FrameCount;
+
+    // 包级调试数据列表（一个游戏可能有多个资源包）
+    public List<DebugPackageData> PackageDatas = new List<DebugPackageData>(10);
+
+    // 序列化/反序列化
+    public static byte[] Serialize(DebugReport debugReport);
+    public static DebugReport Deserialize(byte[] data);
+}
+```
+
+### DebugPackageData
+
+包级调试数据，包含单个资源包的所有诊断信息。
+
+```csharp
+[Serializable]
+internal class DebugPackageData
+{
+    // 资源包名称
+    public string PackageName;
+
+    // 资源加载器列表
+    public List<DebugProviderInfo> ProviderInfos = new List<DebugProviderInfo>(1000);
+
+    // 资源包列表
+    public List<DebugBundleInfo> BundleInfos = new List<DebugBundleInfo>(1000);
+
+    // 异步操作列表
+    public List<DebugOperationInfo> OperationInfos = new List<DebugOperationInfo>(1000);
+
+    // 运行时查询字典（非序列化，按需构建）
+    [NonSerialized]
+    public Dictionary<string, DebugBundleInfo> BundleInfoDic;
+
+    // 延迟解析字典
+    public DebugBundleInfo GetBundleInfo(string bundleName);
+}
+```
+
+### DebugProviderInfo
+
+资源加载器（Provider）的调试信息。
+
+```csharp
+[Serializable]
+internal struct DebugProviderInfo : IComparer<DebugProviderInfo>, IComparable<DebugProviderInfo>
+{
+    public string PackageName;           // 所属包名
+    public string AssetPath;             // 资源路径（如 "Assets/Prefabs/Player.prefab"）
+    public string SpawnScene;            // 资源加载时的活跃场景名
+    public string BeginTime;             // 加载开始时间（格式：HH:mm:ss.fff）
+    public long LoadingTime;             // 加载耗时（单位：毫秒）
+    public int RefCount;                 // 引用计数
+    public string Status;                // 加载状态（None/Processing/Succeed/Failed）
+    public List<string> DependBundles;   // 依赖的资源包名列表
+
+    // 按 AssetPath 字母排序
+    public int CompareTo(DebugProviderInfo other);
+}
+```
+
+**关键诊断价值：**
+- `SpawnScene`：追踪资源在哪个场景被加载，帮助识别资源泄漏
+- `LoadingTime`：性能分析，识别加载慢的资源
+- `RefCount`：引用计数监控，RefCount > 0 表示资源仍在使用
+- `DependBundles`：依赖分析，理解资源加载的完整依赖链
+
+### DebugBundleInfo
+
+资源包（Bundle）的调试信息。
+
+```csharp
+[Serializable]
+internal struct DebugBundleInfo : IComparer<DebugBundleInfo>, IComparable<DebugBundleInfo>
+{
+    public string BundleName;              // 资源包名称
+    public int RefCount;                   // 引用计数（当前有多少个 Provider 在使用）
+    public string Status;                  // 加载状态
+    public List<string> ReferenceBundles;  // 反向依赖（谁引用了我）
+
+    // 按 BundleName 字母排序
+    public int CompareTo(DebugBundleInfo other);
+}
+```
+
+**关键诊断价值：**
+- `RefCount`：Bundle 引用计数，为 0 时可以被卸载
+- `ReferenceBundles`：反向依赖分析，了解 Bundle 被哪些其他 Bundle 依赖
+
+### DebugOperationInfo
+
+异步操作的调试信息，支持递归树结构。
+
+```csharp
+[Serializable]
+internal struct DebugOperationInfo : IComparer<DebugOperationInfo>, IComparable<DebugOperationInfo>
+{
+    public string OperationName;   // 操作类名（如 "LoadAssetOperation"）
+    public string OperationDesc;   // 操作说明（自定义描述）
+    public uint Priority;          // 优先级（用于操作排序）
+    public float Progress;         // 进度（0.0 - 1.0）
+    public string BeginTime;       // 操作开始时间
+    public long ProcessTime;       // 处理耗时（单位：毫秒）
+    public string Status;          // 操作状态（None/Processing/Succeed/Failed）
+    public List<DebugOperationInfo> Childs;  // 子操作列表（支持嵌套树结构）
+
+    public int CompareTo(DebugOperationInfo other);
+}
+```
+
+**递归树结构示例：**
+```
+InitializationOperation
+├─ LoadManifestOperation
+│  ├─ LoadBundleFileOperation (manifest.bundle)
+│  └─ DeserializeManifestOperation
+└─ InitFileSystemOperation
+```
+
+**关键诊断价值：**
+- `OperationName`：操作类型识别
+- `ProcessTime`：性能瓶颈分析
+- `Childs`：操作依赖关系可视化
+
+---
+
+## 通信系统
+
+### RemoteDebuggerInRuntime
+
+运行时调试器主类，负责接收命令、采样数据、发送报告。
+
+```csharp
+internal class RemoteDebuggerInRuntime : MonoBehaviour
+{
+    // 采样控制标志
+    private static bool _sampleOnce = false;      // 单次采样
+    private static bool _autoSample = false;      // 连续采样
+
+    // 运行时初始化
+    [RuntimeInitializeOnLoadMethod]
+    private static void RuntimeInitializeOnLoad()
+    {
+        _sampleOnce = false;
+        _autoSample = false;
+    }
+
+    private void Awake()
+    {
+        RemotePlayerConnection.Instance.Initialize();
+    }
+
+    private void OnEnable()
+    {
+        // 注册命令接收回调
+        RemotePlayerConnection.Instance.Register(
+            RemoteDebuggerDefine.kMsgEditorSendToPlayer,
+            OnHandleEditorMessage);
+    }
+
+    private void LateUpdate()
+    {
+        // 采样逻辑（在一帧的最后执行）
+        if (_autoSample || _sampleOnce)
+        {
+            _sampleOnce = false;
+            var debugReport = YooAssets.GetDebugReport();
+            var data = DebugReport.Serialize(debugReport);
+
+            RemotePlayerConnection.Instance.Send(
+                RemoteDebuggerDefine.kMsgPlayerSendToEditor,
+                data);
+        }
+    }
+
+    private static void OnHandleEditorMessage(MessageEventArgs args)
+    {
+        var command = RemoteCommand.Deserialize(args.data);
+
+        if (command.CommandType == (int)ERemoteCommand.SampleOnce)
+        {
+            _sampleOnce = true;
+        }
+        else if (command.CommandType == (int)ERemoteCommand.SampleAuto)
+        {
+            _autoSample = (command.CommandParam == "open");
+        }
+    }
+}
+```
+
+**关键设计点：**
+1. **LateUpdate 时机**：确保该帧所有资源加载完成后再采样
+2. **状态重置**：`[RuntimeInitializeOnLoadMethod]` 确保编辑器重新编译时重置状态
+3. **DEBUG 模式自动启用**：通过 `#if DEBUG` 条件编译自动添加组件
+
+### 双连接层架构
+
+YooAsset 支持两种通信模式：
+
+| 模式 | 使用场景 | 实现方式 |
+|------|----------|----------|
+| **编辑器模拟模式** | 开发调试 | `RemotePlayerConnection` + `RemoteEditorConnection`（虚拟连接） |
+| **发布版本** | 运营期监控 | Unity 的 `PlayerConnection` API（真实网络） |
+
+#### RemotePlayerConnection（编辑器模拟模式）
+
+```csharp
+internal class RemotePlayerConnection
+{
+    private static RemotePlayerConnection _instance;
+    private readonly Dictionary<Guid, UnityAction<MessageEventArgs>> _messageCallbacks;
+
+    public static RemotePlayerConnection Instance
+    {
+        get
+        {
+            if (_instance == null)
+                _instance = new RemotePlayerConnection();
+            return _instance;
+        }
+    }
+
+    public void Register(Guid messageID, UnityAction<MessageEventArgs> callback)
+    {
+        _messageCallbacks.Add(messageID, callback);
+    }
+
+    public void Send(Guid messageID, byte[] data)
+    {
+        // 在编辑器模拟模式下，发送给虚拟编辑器连接
+        RemoteEditorConnection.Instance.HandlePlayerMessage(messageID, data);
+    }
+
+    internal void HandleEditorMessage(Guid messageID, byte[] data)
+    {
+        if (_messageCallbacks.TryGetValue(messageID, out var callback))
+        {
+            callback.Invoke(new MessageEventArgs { playerId = 0, data = data });
+        }
+    }
+}
+```
+
+#### RemoteEditorConnection（运行时模拟模式）
+
+```csharp
+internal class RemoteEditorConnection
+{
+    private static RemoteEditorConnection _instance;
+    private readonly Dictionary<Guid, UnityAction<MessageEventArgs>> _messageCallbacks;
+
+    public static RemoteEditorConnection Instance
+    {
+        get
+        {
+            if (_instance == null)
+                _instance = new RemoteEditorConnection();
+            return _instance;
+        }
+    }
+
+    public void Register(Guid messageID, UnityAction<MessageEventArgs> callback)
+    {
+        _messageCallbacks.Add(messageID, callback);
+    }
+
+    public void Send(Guid messageID, byte[] data)
+    {
+        // 发送给虚拟运行时连接
+        RemotePlayerConnection.Instance.HandleEditorMessage(messageID, data);
+    }
+
+    internal void HandlePlayerMessage(Guid messageID, byte[] data)
+    {
+        if (_messageCallbacks.TryGetValue(messageID, out var callback))
+        {
+            callback.Invoke(new MessageEventArgs { playerId = 0, data = data });
+        }
+    }
+}
+```
+
+---
+
+## 通信协议
+
+### 协议规范
+
+**协议版本：** 2.3.3
+
+**编码格式：**
+```
+C# 对象 → JsonUtility.ToJson() → JSON 字符串 → Encoding.UTF8.GetBytes() → byte[]
+```
+
+**消息类型：**
+
+| 方向 | GUID | 数据类型 | 说明 |
+|------|------|----------|------|
+| 编辑器→运行时 | `4d1926c9df5b052469a1c63448b7609a` | `RemoteCommand` | 采样命令 |
+| 运行时→编辑器 | `e34a5702dd353724aa315fb8011f08c3` | `DebugReport` | 调试报告 |
+
+### 双向通信流程
+
+```
+[编辑器 UI]
+  │
+  ├─ 用户点击 "Sample" 按钮
+  │   └─ 发送 RemoteCommand (SampleOnce)
+  │
+  └─ 用户开启 "Record" 开关
+      └─ 发送 RemoteCommand (SampleAuto, "open")
+
+      ↓ RemoteEditorConnection.Send()
+      ↓
+      RemotePlayerConnection.HandleEditorMessage()
+      ↓ 触发回调
+
+[运行时]
+  RemoteDebuggerInRuntime.OnHandleEditorMessage()
+  ↓
+  设置采样标志 (_sampleOnce 或 _autoSample)
+  ↓
+  LateUpdate 中采样
+  ↓
+  YooAssets.GetDebugReport()
+    ├─ 收集所有 ResourcePackage 数据
+    ├─ DebugProviderInfo[] (从 ProviderDic)
+    ├─ DebugBundleInfo[] (从 LoaderDic)
+    └─ DebugOperationInfo[] (从 _operations)
+  ↓
+  DebugReport.Serialize()
+  ↓
+  RemotePlayerConnection.Send()
+  ↓
+  RemoteEditorConnection.HandlePlayerMessage()
+  ↓
+
+[编辑器]
+  AssetBundleDebuggerWindow.OnHandlePlayerMessage()
+  ↓
+  版本校验 (DebuggerVersion)
+  ↓
+  RemotePlayerSession.AddDebugReport()
+  ↓
+  缓存到历史记录 (最多 500 帧)
+  ↓
+  UI 刷新显示
+```
+
+### 版本校验机制
+
+```csharp
+// 编辑器端版本校验
+private void OnHandlePlayerMessage(MessageEventArgs args)
+{
+    var debugReport = DebugReport.Deserialize(args.data);
+
+    // 版本校验
+    if (debugReport.DebuggerVersion != RemoteDebuggerDefine.DebuggerVersion)
+    {
+        Debug.LogWarning(
+            $"Debugger versions are inconsistent : " +
+            $"{debugReport.DebuggerVersion} != {RemoteDebuggerDefine.DebuggerVersion}");
+        return;  // 丢弃不兼容的数据
+    }
+
+    // 处理数据...
+}
+```
+
+**设计意图：** 防止编辑器和运行时的调试器版本不一致导致的数据格式错误。
+
+---
+
+## 数据收集流程
+
+### 完整采样流程
+
+```
+RemoteDebuggerInRuntime.LateUpdate()
+  ↓
+检查 _sampleOnce 或 _autoSample 标志
+  ↓ YES
+调用 YooAssets.GetDebugReport()
+  │
+  ├─ 初始化 DebugReport
+  ├─ 设置 FrameCount = Time.frameCount
+  ├─ 遍历每个 ResourcePackage：
+  │   │
+  │   └─ package.GetDebugPackageData()
+  │       │
+  │       ├─ 创建 DebugPackageData
+  │       ├─ 设置 PackageName
+  │       │
+  │       ├─ 收集 ProviderInfos：
+  │       │   ResourceManager.GetDebugProviderInfos()
+  │       │   遍历 ProviderDic：
+  │       │     └─ 每个 ProviderOperation 提供：
+  │       │         - MainAssetInfo.AssetPath
+  │       │         - SpawnScene（场景名）
+  │       │         - BeginTime（开始时间）
+  │       │         - ProcessTime（耗时）
+  │       │         - RefCount（引用计数）
+  │       │         - Status（加载状态）
+  │       │         - GetDebugDependBundles()（依赖列表）
+  │       │
+  │       ├─ 收集 BundleInfos：
+  │       │   ResourceManager.GetDebugBundleInfos()
+  │       │   遍历 LoaderDic：
+  │       │     └─ 每个 LoadBundleFileOperation 提供：
+  │       │         - BundleName
+  │       │         - RefCount
+  │       │         - Status
+  │       │         - FilterReferenceBundles()（反向依赖）
+  │       │
+  │       └─ 收集 OperationInfos：
+  │           OperationSystem.GetDebugOperationInfos(PackageName)
+  │           遍历 _operations（按 PackageName 过滤）：
+  │             └─ 递归构建操作树：
+  │                 - GetType().Name（操作类名）
+  │                 - GetOperationDesc()（自定义描述）
+  │                 - Priority（优先级）
+  │                 - Progress（进度）
+  │                 - BeginTime（开始时间）
+  │                 - ProcessTime（耗时）
+  │                 - Status（状态）
+  │                 - Childs（子操作列表）
+  │
+  └─ 返回 DebugReport
+```
+
+### 性能指标收集
+
+#### 资源加载耗时
+
+```csharp
+// AsyncOperationBase 中的自动计时
+private Stopwatch _watch = null;
+
+internal void InternalStart()
+{
+    if (_watch == null)
+    {
+        BeginTime = SpawnTimeToString(UnityEngine.Time.realtimeSinceStartup);
+        _watch = Stopwatch.StartNew();
+    }
+}
+
+internal void InternalUpdate()
+{
+    ProcessTime = _watch.ElapsedMilliseconds;
+    // ... 持续计时
+}
+```
+
+#### 场景信息追踪
+
+```csharp
+// ProviderOperation.cs
+[Conditional("DEBUG")]  // 仅在 DEBUG 模式下启用
+public void InitProviderDebugInfo()
+{
+    SpawnScene = UnityEngine.SceneManagement.SceneManager.GetActiveScene().name;
+}
+```
+
+#### 引用计数监控
+
+```csharp
+// ProviderOperation 和 LoadBundleFileOperation 都维护 RefCount
+public int RefCount { get; }  // 当前被引用的次数
+```
+
+---
+
+## 与其他模块的交互
+
+```
+YooAssets (全局入口)
+    │
+    ├─ 初始化阶段：
+    │   #if DEBUG
+    │   _driver.AddComponent<RemoteDebuggerInRuntime>();
+    │   #endif
+    │
+    └─ 数据收集入口：
+        GetDebugReport()
+            ├─ 遍历所有 ResourcePackage
+            └─ 构建 DebugReport
+
+ResourcePackage (资源包)
+    │
+    └─ GetDebugPackageData()
+        ├─ 调用 ResourceManager.GetDebugProviderInfos()
+        ├─ 调用 ResourceManager.GetDebugBundleInfos()
+        └─ 调用 OperationSystem.GetDebugOperationInfos()
+
+ResourceManager (资源管理器)
+    │
+    ├─ GetDebugProviderInfos()
+    │   └─ 遍历 ProviderDic (Dictionary<string, ProviderOperation>)
+    │
+    └─ GetDebugBundleInfos()
+        └─ 遍历 LoaderDic (Dictionary<string, LoadBundleFileOperation>)
+
+OperationSystem (操作系统)
+    │
+    └─ GetDebugOperationInfos(packageName)
+        └─ 遍历 _operations (List<AsyncOperationBase>)
+            └─ 递归收集子操作 (Childs)
+
+AsyncOperationBase (异步操作基类)
+    │
+    ├─ BeginTime：操作开始时间
+    ├─ ProcessTime：累计处理耗时
+    ├─ Status：操作状态
+    ├─ Progress：进度
+    └─ GetOperationDesc()：自定义描述
+
+ProviderOperation (资源提供者)
+    │
+    ├─ SpawnScene：加载时的活跃场景
+    └─ GetDebugDependBundles()：依赖包列表
+
+LoadBundleFileOperation (Bundle 加载器)
+    │
+    ├─ RefCount：引用计数
+    └─ LoadBundleInfo：Bundle 信息
+```
+
+---
+
+## 使用场景
+
+### 场景 1：运行时资源泄漏诊断
+
+**问题：** 游戏切换场景后内存持续增长，怀疑有资源未释放。
+
+**诊断步骤：**
+1. 打开 AssetBundle Debugger 窗口
+2. 开启 Record 模式（自动采样）
+3. 切换场景前后观察 ProviderInfos 列表
+4. 检查 `RefCount > 0` 且 `SpawnScene` 为旧场景的资源
+5. 定位未释放的资源和对应的代码位置
+
+**关键字段：**
+- `SpawnScene`：资源在哪个场景被加载
+- `RefCount`：引用计数，应该为 0
+- `AssetPath`：资源路径，定位具体资源
+
+### 场景 2：资源加载性能分析
+
+**问题：** 首次加载场景卡顿严重。
+
+**诊断步骤：**
+1. 单次采样（Sample Once）
+2. 切换到 Asset View
+3. 按 `LoadingTime` 降序排序
+4. 识别加载耗时最长的资源
+5. 分析 `DependBundles` 了解依赖链
+
+**关键字段：**
+- `LoadingTime`：加载耗时（毫秒）
+- `DependBundles`：依赖的 Bundle 列表
+- `Status`：加载状态
+
+### 场景 3：Bundle 引用分析
+
+**问题：** 某个 Bundle 无法被卸载。
+
+**诊断步骤：**
+1. 切换到 Bundle View
+2. 搜索目标 Bundle
+3. 检查 `RefCount` 和 `ReferenceBundles`
+4. 追踪哪些资源正在使用该 Bundle
+5. 定位未释放的资源引用
+
+**关键字段：**
+- `RefCount`：Bundle 引用计数
+- `ReferenceBundles`：反向依赖列表
+- `Status`：Bundle 加载状态
+
+### 场景 4：异步操作监控
+
+**问题：** 复杂的初始化流程卡住，不知道在哪个步骤。
+
+**诊断步骤：**
+1. 切换到 Operation View
+2. 查看操作树结构
+3. 检查 `Status` 为 `Processing` 的操作
+4. 分析 `Progress` 了解进度
+5. 通过 `Childs` 了解操作依赖关系
+
+**关键字段：**
+- `OperationName`：操作类型
+- `OperationDesc`：操作描述
+- `Progress`：进度（0.0 - 1.0）
+- `Childs`：子操作列表
+
+---
+
+## 数据导出
+
+### JSON 导出功能
+
+编辑器窗口支持导出当前帧的完整调试数据为 JSON 文件。
+
+**导出示例：**
+
+```json
+{
+  "DebuggerVersion": "2.3.3",
+  "FrameCount": 1234,
+  "PackageDatas": [
+    {
+      "PackageName": "DefaultPackage",
+      "ProviderInfos": [
+        {
+          "PackageName": "DefaultPackage",
+          "AssetPath": "Assets/Prefabs/Player.prefab",
+          "SpawnScene": "GameScene",
+          "BeginTime": "12:34:56.789",
+          "LoadingTime": 45,
+          "RefCount": 1,
+          "Status": "Succeed",
+          "DependBundles": [
+            "assets_prefabs.bundle"
+          ]
+        }
+      ],
+      "BundleInfos": [
+        {
+          "BundleName": "assets_prefabs.bundle",
+          "RefCount": 1,
+          "Status": "Succeed",
+          "ReferenceBundles": []
+        }
+      ],
+      "OperationInfos": [
+        {
+          "OperationName": "LoadAssetOperation",
+          "OperationDesc": "Load assets_prefabs.bundle",
+          "Priority": 0,
+          "Progress": 1.0,
+          "BeginTime": "12:34:56.745",
+          "ProcessTime": 44,
+          "Status": "Succeed",
+          "Childs": []
+        }
+      ]
+    }
+  ]
+}
+```
+
+**用途：**
+- 离线分析和归档
+- 性能数据对比
+- 问题复现和追踪
+
+---
+
+## 系统架构图
+
+```
+┌─────────────────────────────────────────────────────────────────────┐
+│                        Unity Editor Window                           │
+│                   AssetBundleDebuggerWindow                          │
+│  ┌──────────────────────────────────────────────────────────────┐   │
+│  │ UI Controls:                                                  │   │
+│  │  - Sample Button (SampleOnce)                               │   │
+│  │  - Record Toggle (SampleAuto)                               │   │
+│  │  - View Mode Menu (Asset/Bundle/Operation View)            │   │
+│  │  - Frame Slider (历史帧导航)                                │   │
+│  │  - Search Field (关键词搜索)                                │   │
+│  │  - Export Button (JSON 导出)                                │   │
+│  └──────────────────────────────────────────────────────────────┘   │
+└────────────┬──────────────────────────────────────────────────────────┘
+             │
+       ┌─────▼───────────────────────────────────┐
+       │  RemoteEditorConnection (虚拟连接)       │
+       │  - Register callbacks                   │
+       │  - Send/Receive commands & reports      │
+       └─────┬──────────────────────────────┬────┘
+             │                              │
+    ┌────────▼─────────────┐    ┌──────────▼───────────────┐
+    │  RemoteCommand       │    │  DebugReport             │
+    │  (Serialize)         │    │  (Deserialize)           │
+    │  ↓ JSON              │    │  ← JSON                  │
+    │  ↓ UTF-8 bytes       │    │  ← UTF-8 bytes           │
+    └────────┬─────────────┘    └──────────┬───────────────┘
+             │                              │
+             │    ═══════════════════════   │
+             │    Internet / Emulation      │
+             │    ═══════════════════════   │
+             │                              │
+    ┌────────▼─────────────┐    ┌──────────▼───────────────┐
+    │  PlayerConnection    │    │  RemotePlayerConnection  │
+    │  (真实连接)          │    │  (虚拟连接)              │
+    │  或模拟连接          │    │                          │
+    └────────┬─────────────┘    └──────────┬───────────────┘
+             │                              │
+             └──────────────┬───────────────┘
+                            │
+                     ┌──────▼──────────────────────────────┐
+                     │  RemoteDebuggerInRuntime             │
+                     │  (MonoBehaviour)                     │
+                     │  ┌──────────────────────────────┐   │
+                     │  │ _sampleOnce (bool)           │   │
+                     │  │ _autoSample (bool)           │   │
+                     │  └──────────────────────────────┘   │
+                     │  ┌──────────────────────────────┐   │
+                     │  │ Awake() - 初始化连接         │   │
+                     │  │ OnEnable() - 注册回调        │   │
+                     │  │ LateUpdate() - 采样触发      │   │
+                     │  │ OnHandleEditorMessage() - 收命令│  │
+                     │  └──────────────────────────────┘   │
+                     └──────────┬──────────────────────────┘
+                                │
+                         ┌──────▼────────────────────┐
+                         │  YooAssets.GetDebugReport() │
+                         │  (全系统数据收集入口)      │
+                         └──────┬────────────────────┘
+                                │
+                    ┌───────────┼───────────┐
+                    │           │           │
+         ┌──────────▼──┐  ┌─────▼────┐  ┌──▼─────────────┐
+         │ResourcePkg 1│  │ResourcePkg2  │ResourcePackageN│
+         └──────┬──────┘  └────┬─────┘  └──┬──────────┘
+                │               │          │
+                └───────────────┼──────────┘
+                                │
+                    ┌───────────▼──────────┐
+                    │ DebugPackageData     │
+                    │ ┌─────────────────┐  │
+                    │ │ PackageName     │  │
+                    │ │ ProviderInfos[] │  │
+                    │ │ BundleInfos[]   │  │
+                    │ │ OperationInfos[]│  │
+                    │ └─────────────────┘  │
+                    └─────────────────────┘
+```
+
+---
+
+## 注意事项
+
+1. **DEBUG 模式自动启用**
+   - 诊断系统仅在 `DEBUG` 模式下启用（通过 `#if DEBUG` 条件编译）
+   - Release 构建中不会包含诊断代码，无性能开销
+
+2. **版本兼容性**
+   - 编辑器和运行时的调试器版本必须一致
+   - 版本不一致的数据会被自动丢弃
+
+3. **历史数据限制**
+   - 最多缓存 500 帧历史数据（可配置）
+   - 超过限制后，最早的数据会被移除
+
+4. **JSON 序列化深度限制**
+   - Unity JsonUtility 序列化深度限制为 10 层
+   - 操作树（Childs）嵌套过深可能导致序列化失败
+
+5. **性能开销**
+   - 单次采样：低开销，仅在需要时采集
+   - 自动采样：每帧采集，有一定性能开销，建议仅在需要时开启
+
+6. **LateUpdate 时机**
+   - 采样在 LateUpdate 中执行，确保该帧所有操作已更新
+   - 避免在采样过程中资源状态发生变化
+
+7. **非序列化字典**
+   - `DebugPackageData.BundleInfoDic` 使用 `[NonSerialized]` 标记
+   - 字典在首次查询时才构建，减少序列化开销
+
+8. **场景追踪条件编译**
+   - `SpawnScene` 字段仅在 DEBUG 模式下赋值（`[Conditional("DEBUG")]`）
+   - Release 构建中该字段为空字符串
+
+---
+
+## 性能优化建议
+
+1. **按需采样**
+   - 优先使用单次采样（Sample Once）
+   - 仅在需要连续监控时开启自动采样（Record）
+
+2. **及时关闭 Record**
+   - 分析完成后及时关闭自动采样
+   - 避免不必要的性能开销
+
+3. **合理设置历史缓存**
+   - 根据内存情况调整 `MaxReportCount`
+   - 默认 500 帧已足够大多数分析场景
+
+4. **导出数据离线分析**
+   - 对于复杂的性能问题，导出 JSON 数据
+   - 在编辑器外使用专业工具进行分析
+
+5. **Release 构建移除诊断代码**
+   - 确保 Release 构建使用 Release 配置
+   - 诊断代码通过 `#if DEBUG` 自动移除

Assets/YooAsset/Runtime/DiagnosticSystem/README.md.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 5fa2b66c20800124c8dd5cb77e854ce3
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DiagnosticSystem/RemoteEditorConnection.cs

@@ -36,7 +36,7 @@ namespace YooAsset
         public void Register(Guid messageID, UnityAction<MessageEventArgs> callback)
         {
             if (messageID == Guid.Empty)
-                throw new ArgumentException("messageID is empty !");
+                throw new ArgumentException("messageID is empty.");
 
             if (_messageCallbacks.ContainsKey(messageID) == false)
                 _messageCallbacks.Add(messageID, callback);
@@ -49,7 +49,7 @@ namespace YooAsset
         public void Send(Guid messageID, byte[] data)
         {
             if (messageID == Guid.Empty)
-                throw new ArgumentException("messageID is empty !");
+                throw new ArgumentException("messageID is empty.");
 
             // 接收对方的消息
             RemotePlayerConnection.Instance.HandleEditorMessage(messageID, data);

Assets/YooAsset/Runtime/DiagnosticSystem/RemotePlayerConnection.cs

@@ -36,7 +36,7 @@ namespace YooAsset
         public void Register(Guid messageID, UnityAction<MessageEventArgs> callback)
         {
             if (messageID == Guid.Empty)
-                throw new ArgumentException("messageID is empty !");
+                throw new ArgumentException("messageID is empty.");
 
             if (_messageCallbacks.ContainsKey(messageID) == false)
                 _messageCallbacks.Add(messageID, callback);
@@ -49,7 +49,7 @@ namespace YooAsset
         public void Send(Guid messageID, byte[] data)
         {
             if (messageID == Guid.Empty)
-                throw new ArgumentException("messageID is empty !");
+                throw new ArgumentException("messageID is empty.");
 
             // 接收对方的消息
             RemoteEditorConnection.Instance.HandlePlayerMessage(messageID, data);

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadBackend.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: e9d6cb1ce5d510645866ad7c122abfab
+guid: bb70e2274ce5a5d419cfbd7212efdf4a
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadBackend/UnityWebRequestBackend.cs

@@ -0,0 +1,110 @@
+using System;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// UnityWebRequest 下载后台
+    /// </summary>
+    /// <remarks>
+    /// 基于 Unity 内置 UnityWebRequest 实现的下载后台。
+    /// 支持自定义 UnityWebRequest 创建方式，例如添加证书验证、代理设置等。
+    /// </remarks>
+    internal sealed class UnityWebRequestBackend : IDownloadBackend
+    {
+        private readonly UnityWebRequestCreator _webRequestCreator;
+
+        /// <summary>
+        /// 后端名称
+        /// </summary>
+        public string Name
+        {
+            get { return nameof(UnityWebRequestBackend); }
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest 下载后端（使用默认创建方式）
+        /// </summary>
+        public UnityWebRequestBackend() : this(null)
+        {
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest 下载后端
+        /// </summary>
+        /// <param name="webRequestCreator">
+        /// 自定义 UnityWebRequest 创建委托（可选）。
+        /// 如果为 null，则使用默认的 UnityWebRequest 构造方式。
+        /// </param>
+        public UnityWebRequestBackend(UnityWebRequestCreator webRequestCreator)
+        {
+            _webRequestCreator = webRequestCreator;
+        }
+
+        /// <summary>
+        /// 驱动更新
+        /// </summary>
+        /// <remarks>
+        /// UnityWebRequest 由 Unity 引擎自动驱动，无需额外更新。
+        /// </remarks>
+        public void Update()
+        {
+        }
+
+        /// <summary>
+        /// 释放资源
+        /// </summary>
+        public void Dispose()
+        {
+            // 无需释放资源
+        }
+
+        /// <summary>
+        /// 创建 HEAD 请求
+        /// </summary>
+        public IDownloadHeadRequest CreateHeadRequest(DownloadDataRequestArgs args)
+        {
+            return new UnityWebRequestHeadDownloader(args, _webRequestCreator);
+        }
+
+        /// <summary>
+        /// 创建文件下载请求
+        /// </summary>
+        public IDownloadFileRequest CreateFileRequest(DownloadFileRequestArgs args)
+        {
+            return new UnityWebRequestFileDownloader(args, _webRequestCreator);
+        }
+
+        /// <summary>
+        /// 创建字节下载请求
+        /// </summary>
+        public IDownloadBytesRequest CreateBytesRequest(DownloadDataRequestArgs args)
+        {
+            return new UnityWebRequestBytesDownloader(args, _webRequestCreator);
+        }
+
+        /// <summary>
+        /// 创建文本下载请求
+        /// </summary>
+        public IDownloadTextRequest CreateTextRequest(DownloadDataRequestArgs args)
+        {
+            return new UnityWebRequestTextDownloader(args, _webRequestCreator);
+        }
+
+        /// <summary>
+        /// 创建 AssetBundle 下载请求
+        /// </summary>
+        public IDownloadAssetBundleRequest CreateAssetBundleRequest(DownloadAssetBundleRequestArgs args)
+        {
+            return new UnityWebRequestAssetBundleDownloader(args, _webRequestCreator);
+        }
+
+        /// <summary>
+        /// 创建模拟下载请求
+        /// </summary>
+        public IDownloadFileRequest CreateSimulateRequest(DownloadSimulateRequestArgs args)
+        {
+            return new VirtualFileDownloader(args);
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadBackend/UnityWebRequestBackend.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 932e4c4574244dac8c27d9ddc156f8ff
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadBackend/UnityWebRequestCreator.cs

@@ -0,0 +1,10 @@
+using UnityEngine.Networking;
+using UnityEngine;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 自定义下载器的请求委托
+    /// </summary>
+    public delegate UnityWebRequest UnityWebRequestCreator(string url, string method);
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadBackend/UnityWebRequestCreator.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 0fa3e6346decc4d4db3b03e6ae93e57a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 1d30af9086de4fb282c2cdd3d26244c0
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestAssetBundleDownloader.cs

@@ -0,0 +1,90 @@
+using System;
+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// UnityWebRequest AssetBundle 下载器
+    /// </summary>
+    /// <remarks>
+    /// 下载并加载 Unity AssetBundle 资源包。
+    /// 支持 Unity 内置缓存机制和 CRC 校验。
+    /// </remarks>
+    internal sealed class UnityWebRequestAssetBundleDownloader : UnityWebRequestDownloaderBase, IDownloadAssetBundleRequest
+    {
+        private readonly DownloadAssetBundleRequestArgs _args;
+        private DownloadHandlerAssetBundle _downloadHandler;
+
+        /// <summary>
+        /// 下载结果（AssetBundle 对象）
+        /// </summary>
+        public AssetBundle Result { get; private set; }
+
+        /// <summary>
+        /// 构造 AssetBundle 下载器
+        /// </summary>
+        /// <param name="args">AssetBundle 下载参数</param>
+        /// <param name="webRequestCreator">UnityWebRequest 创建器（可选）</param>
+        public UnityWebRequestAssetBundleDownloader(DownloadAssetBundleRequestArgs args, UnityWebRequestCreator webRequestCreator)
+            : base(args.URL, webRequestCreator)
+        {
+            _args = args;
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest
+        /// </summary>
+        protected override void CreateWebRequest()
+        {
+            _downloadHandler = CreateAssetBundleDownloadHandler();
+            _webRequest = CreateUnityWebRequestGet(URL);
+            _webRequest.downloadHandler = _downloadHandler;
+            _webRequest.disposeDownloadHandlerOnDispose = true;
+            ApplyRequestOptions(_args.Timeout, _args.WatchdogTime, _args.Headers);
+        }
+
+        /// <summary>
+        /// 请求成功时的回调
+        /// </summary>
+        protected override void OnRequestSucceed()
+        {
+            AssetBundle assetBundle = _downloadHandler.assetBundle;
+            if (assetBundle == null)
+            {
+                Status = EDownloadRequestStatus.Failed;
+                Error = $"[{GetType().Name}] URL: {URL} - AssetBundle object is null";
+            }
+            else
+            {
+                Result = assetBundle;
+            }
+        }
+
+        /// <summary>
+        /// 创建 AssetBundle 下载处理器
+        /// </summary>
+        private DownloadHandlerAssetBundle CreateAssetBundleDownloadHandler()
+        {
+            DownloadHandlerAssetBundle handler;
+
+            if (_args.DisableUnityWebCache)
+            {
+                // 禁用 Unity 缓存
+                handler = new DownloadHandlerAssetBundle(URL, _args.UnityCRC);
+            }
+            else
+            {
+                if (string.IsNullOrEmpty(_args.FileHash))
+                    throw new YooInternalException("File hash is null or empty.");
+
+                // 使用 Unity 缓存
+                // 说明：The file hash defining the version of the asset bundle.
+                Hash128 fileHash = Hash128.Parse(_args.FileHash);
+                handler = new DownloadHandlerAssetBundle(URL, fileHash, _args.UnityCRC);
+            }
+
+            return handler;
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestAssetBundleDownloader.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: e01cc308d7179a34281087fafe455b42
+guid: 6f635344c08e2b04295a108c2bcc6a40
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestBytesDownloader.cs

@@ -0,0 +1,52 @@
+using System;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// UnityWebRequest 字节下载器
+    /// </summary>
+    /// <remarks>
+    /// 将下载内容保存到内存中的字节数组。
+    /// </remarks>
+    internal sealed class UnityWebRequestBytesDownloader : UnityWebRequestDownloaderBase, IDownloadBytesRequest
+    {
+        private readonly DownloadDataRequestArgs _args;
+
+        /// <summary>
+        /// 下载结果（字节数组）
+        /// </summary>
+        public byte[] Result { get; private set; }
+
+        /// <summary>
+        /// 构造字节数组下载器
+        /// </summary>
+        /// <param name="args">数据下载参数</param>
+        /// <param name="webRequestCreator">UnityWebRequest 创建器（可选）</param>
+        public UnityWebRequestBytesDownloader(DownloadDataRequestArgs args, UnityWebRequestCreator webRequestCreator)
+            : base(args.URL, webRequestCreator)
+        {
+            _args = args;
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest
+        /// </summary>
+        protected override void CreateWebRequest()
+        {
+            var handler = new DownloadHandlerBuffer();
+            _webRequest = CreateUnityWebRequestGet(URL);
+            _webRequest.downloadHandler = handler;
+            _webRequest.disposeDownloadHandlerOnDispose = true;
+            ApplyRequestOptions(_args.Timeout, _args.WatchdogTime, _args.Headers);
+        }
+
+        /// <summary>
+        /// 请求成功时的回调
+        /// </summary>
+        protected override void OnRequestSucceed()
+        {
+            Result = _webRequest.downloadHandler.data;
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestBytesDownloader.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 6602c4be2ef295546b7bbb328de8fb0c
+guid: 38884a96e8c2df74082d4e059e2e73ed
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestDownloaderBase.cs

@@ -0,0 +1,288 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// UnityWebRequest 下载器基类
+    /// </summary>
+    /// <remarks>
+    /// 封装 UnityWebRequest 的通用下载逻辑，包括状态管理、进度追踪等。
+    /// 子类只需实现 CreateWebRequest 方法来创建特定类型的下载请求。
+    /// </remarks>
+    internal abstract class UnityWebRequestDownloaderBase : IDownloadRequest
+    {
+        private readonly UnityWebRequestCreator _webRequestCreator;
+        protected UnityWebRequest _webRequest;
+
+        // 看门狗相关
+        private int _watchdogTime = 0;
+        private bool _watchdogAborted = false;
+        private long _lastDownloadBytes = -1;
+        private double _lastGetDataTime;
+
+        #region 接口实现
+        /// <summary>
+        /// 请求地址
+        /// </summary>
+        public string URL { get; }
+
+        /// <summary>
+        /// 是否完成
+        /// </summary>
+        /// <remarks>
+        /// 每次调用都会主动轮询请求 PollingRequest
+        /// </remarks>
+        public bool IsDone
+        {
+            get
+            {
+                PollingRequest();
+                return Status == EDownloadRequestStatus.Succeed
+                    || Status == EDownloadRequestStatus.Failed
+                    || Status == EDownloadRequestStatus.Aborted;
+            }
+        }
+
+        /// <summary>
+        /// 请求状态
+        /// </summary>
+        public EDownloadRequestStatus Status { get; protected set; }
+
+        /// <summary>
+        /// 当前下载进度（0f - 1f）
+        /// </summary>
+        public float DownloadProgress { get; private set; }
+
+        /// <summary>
+        /// 当前请求已接收的字节数
+        /// </summary>
+        public long DownloadedBytes { get; private set; }
+
+        /// <summary>
+        /// HTTP 返回码
+        /// </summary>
+        public long HttpCode { get; private set; }
+
+        /// <summary>
+        /// 错误信息
+        /// </summary>
+        public string Error { get; protected set; }
+        #endregion
+
+        /// <summary>
+        /// 构造下载器基类
+        /// </summary>
+        /// <param name="url">请求地址</param>
+        /// <param name="webRequestCreator">UnityWebRequest 创建器（可选）</param>
+        protected UnityWebRequestDownloaderBase(string url, UnityWebRequestCreator webRequestCreator)
+        {
+            URL = url;
+            _webRequestCreator = webRequestCreator;
+            Status = EDownloadRequestStatus.None;
+        }
+
+        /// <summary>
+        /// 发起请求
+        /// </summary>
+        public void SendRequest()
+        {
+            if (Status == EDownloadRequestStatus.None)
+            {
+                Status = EDownloadRequestStatus.Running;
+
+                try
+                {
+                    CreateWebRequest();
+
+                    if (_webRequest == null)
+                    {
+                        Status = EDownloadRequestStatus.Failed;
+                        Error = $"[{GetType().Name}] Created web request is null.";
+                    }
+                    else
+                    {
+                        _webRequest.SendWebRequest();
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Status = EDownloadRequestStatus.Failed;
+                    Error = $"[{GetType().Name}] Failed to create web request: {ex.Message}";
+                }
+            }
+        }
+
+        /// <summary>
+        /// 轮询请求
+        /// </summary>
+        public void PollingRequest()
+        {
+            if (Status != EDownloadRequestStatus.Running)
+                return;
+
+            DownloadProgress = _webRequest.downloadProgress;
+            DownloadedBytes = (long)_webRequest.downloadedBytes;
+
+            CheckWatchdog();
+            if (_webRequest.isDone == false)
+                return;
+
+            HttpCode = _webRequest.responseCode;
+#if UNITY_2020_3_OR_NEWER
+            bool isSuccess = _webRequest.result == UnityWebRequest.Result.Success;
+#else
+            bool isSuccess = !_webRequest.isNetworkError && !_webRequest.isHttpError;
+#endif
+
+            if (isSuccess)
+            {
+                Status = EDownloadRequestStatus.Succeed;
+                OnRequestSucceed();
+            }
+            else
+            {
+                Status = EDownloadRequestStatus.Failed;
+                Error = $"[{GetType().Name}] URL: {URL} - Error: {_webRequest.error}";
+                OnRequestFailed();
+            }
+
+            // 完成后释放
+            DisposeWebRequest();
+        }
+
+        /// <summary>
+        /// 中止请求
+        /// </summary>
+        public void AbortRequest()
+        {
+            if (Status == EDownloadRequestStatus.None || Status == EDownloadRequestStatus.Running)
+            {
+                Status = EDownloadRequestStatus.Aborted;
+                if (_webRequest != null)
+                    _webRequest.Abort();
+            }
+        }
+
+        /// <summary>
+        /// 释放资源
+        /// </summary>
+        public void Dispose()
+        {
+            DisposeWebRequest();
+        }
+
+
+        /// <summary>
+        /// 创建 UnityWebRequest（子类实现）
+        /// </summary>
+        protected abstract void CreateWebRequest();
+
+        /// <summary>
+        /// 请求成功时的回调（子类可重写）
+        /// </summary>
+        protected virtual void OnRequestSucceed()
+        {
+        }
+
+        /// <summary>
+        /// 请求失败时的回调（子类可重写）
+        /// </summary>
+        protected virtual void OnRequestFailed()
+        {
+        }
+
+
+        /// <summary>
+        /// 创建 UnityWebRequest GET 请求
+        /// </summary>
+        /// <param name="requestUrl">请求地址</param>
+        /// <returns>UnityWebRequest 实例</returns>
+        protected UnityWebRequest CreateUnityWebRequestGet(string requestUrl)
+        {
+            if (_webRequestCreator != null)
+                return _webRequestCreator.Invoke(requestUrl, UnityWebRequest.kHttpVerbGET);
+
+            return new UnityWebRequest(requestUrl, UnityWebRequest.kHttpVerbGET);
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest HEAD 请求
+        /// </summary>
+        /// <param name="requestUrl">请求地址</param>
+        /// <returns>UnityWebRequest 实例</returns>
+        protected UnityWebRequest CreateUnityWebRequestHead(string requestUrl)
+        {
+            if (_webRequestCreator != null)
+                return _webRequestCreator.Invoke(requestUrl, UnityWebRequest.kHttpVerbHEAD);
+
+            return new UnityWebRequest(requestUrl, UnityWebRequest.kHttpVerbHEAD);
+        }
+
+        /// <summary>
+        /// 应用通用请求参数
+        /// </summary>
+        protected void ApplyRequestOptions(int timeout, int watchdogTime, Dictionary<string, string> headers)
+        {
+            if (_webRequest == null)
+                throw new YooInternalException("Web request is null.");
+
+            // 设置看门狗超时时间
+            _watchdogTime = watchdogTime;
+
+            // 设置响应的超时时间
+            if (timeout > 0)
+                _webRequest.timeout = timeout;
+
+            // 设置响应头
+            if (headers != null)
+            {
+                foreach (var header in headers)
+                {
+                    _webRequest.SetRequestHeader(header.Key, header.Value);
+                }
+            }
+        }
+
+        /// <summary>
+        /// 检测看门狗
+        /// </summary>
+        private void CheckWatchdog()
+        {
+            if (_watchdogTime == 0)
+                return;
+            if (_watchdogAborted)
+                return;
+
+            double realtimeSinceStartup = TimeUtility.RealtimeSinceStartup;
+            if (DownloadedBytes != _lastDownloadBytes)
+            {
+                _lastDownloadBytes = DownloadedBytes;
+                _lastGetDataTime = realtimeSinceStartup;
+            }
+            else
+            {
+                double deltaTime = realtimeSinceStartup - _lastGetDataTime;
+                if (deltaTime > _watchdogTime)
+                {
+                    _watchdogAborted = true;
+                    AbortRequest(); //看门狗终止网络请求
+                }
+            }
+        }
+
+        /// <summary>
+        /// 释放资源
+        /// </summary>
+        private void DisposeWebRequest()
+        {
+            if (_webRequest != null)
+            {
+                //注意：引擎底层会自动调用Abort方法
+                _webRequest.Dispose();
+                _webRequest = null;
+            }
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestDownloaderBase.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 9e71e850eded0da43906cb4f7cb75629
+guid: 76b0712524ed69542914db8e44fa64fd
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestFileDownloader.cs

@@ -0,0 +1,56 @@
+using System;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// UnityWebRequest 文件下载器
+    /// </summary>
+    /// <remarks>
+    /// 将下载内容保存到本地文件，支持断点续传和追加写入。
+    /// </remarks>
+    internal sealed class UnityWebRequestFileDownloader : UnityWebRequestDownloaderBase, IDownloadFileRequest
+    {
+        private readonly DownloadFileRequestArgs _args;
+
+        /// <summary>
+        /// 文件保存路径
+        /// </summary>
+        public string SavePath
+        {
+            get { return _args.SavePath; }
+        }
+
+        /// <summary>
+        /// 构造文件下载器
+        /// </summary>
+        /// <param name="args">文件下载参数</param>
+        /// <param name="webRequestCreator">UnityWebRequest 创建器（可选）</param>
+        public UnityWebRequestFileDownloader(DownloadFileRequestArgs args, UnityWebRequestCreator webRequestCreator)
+            : base(args.URL, webRequestCreator)
+        {
+            _args = args;
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest
+        /// </summary>
+        protected override void CreateWebRequest()
+        {
+            var handler = new DownloadHandlerFile(_args.SavePath, _args.AppendToFile);
+            handler.removeFileOnAbort = _args.RemoveFileOnAbort;
+
+            _webRequest = CreateUnityWebRequestGet(URL);
+            _webRequest.downloadHandler = handler;
+            _webRequest.disposeDownloadHandlerOnDispose = true;
+
+            // 断点续传：设置 Range 请求头
+            if (_args.ResumeFromBytes > 0)
+            {
+                _webRequest.SetRequestHeader("Range", $"bytes={_args.ResumeFromBytes}-");
+            }
+
+            ApplyRequestOptions(_args.Timeout, _args.WatchdogTime, _args.Headers);
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestFileDownloader.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 375d88bcf5b9a6146adaf98ceb5369f8
+guid: 101a4be1bb0a85c4d84ecbf3e74f89e4
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestHeadDownloader.cs

@@ -0,0 +1,124 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// UnityWebRequest HEAD 请求下载器
+    /// </summary>
+    /// <remarks>
+    /// 仅获取响应头信息，不下载实际内容。
+    /// 用于检查资源是否存在、获取资源大小、检查缓存有效性等场景。
+    /// </remarks>
+    internal sealed class UnityWebRequestHeadDownloader : UnityWebRequestDownloaderBase, IDownloadHeadRequest
+    {
+        // 注意：缓存响应头（因为 WebRequest 释放后无法获取）
+        private Dictionary<string, string> _cachedResponseHeaders;
+        private readonly DownloadDataRequestArgs _args;
+
+        /// <summary>
+        /// 获取 ETag 响应头
+        /// </summary>
+        public string ETag
+        {
+            get { return GetResponseHeader("ETag"); }
+        }
+
+        /// <summary>
+        /// 获取 Last-Modified 响应头
+        /// </summary>
+        public string LastModified
+        {
+            get { return GetResponseHeader("Last-Modified"); }
+        }
+
+        /// <summary>
+        /// 获取 Content-Type 响应头
+        /// </summary>
+        public string ContentType
+        {
+            get { return GetResponseHeader("Content-Type"); }
+        }
+
+        /// <summary>
+        /// 获取 Content-Length 响应头
+        /// 预期下载的总字节数
+        /// </summary>
+        public long ContentLength
+        {
+            get
+            {
+                string contentLengthStr = GetResponseHeader("Content-Length");
+                if (string.IsNullOrEmpty(contentLengthStr))
+                    return -1;
+
+                if (long.TryParse(contentLengthStr, out long contentLength))
+                {
+                    return contentLength;
+                }
+                else
+                {
+                    return -1;
+                }
+            }
+        }
+
+        /// <summary>
+        /// 构造 HEAD 请求下载器
+        /// </summary>
+        /// <param name="args">数据下载参数</param>
+        /// <param name="webRequestCreator">UnityWebRequest 创建器（可选）</param>
+        public UnityWebRequestHeadDownloader(DownloadDataRequestArgs args, UnityWebRequestCreator webRequestCreator)
+                            : base(args.URL, webRequestCreator)
+        {
+            _args = args;
+        }
+
+        /// <summary>
+        /// 获取响应头信息
+        /// </summary>
+        /// <param name="name">响应头名称（不区分大小写）</param>
+        /// <returns>响应头的值，如果不存在或请求未完成则返回 null</returns>
+        public string GetResponseHeader(string name)
+        {
+            if (_cachedResponseHeaders == null)
+                return null;
+
+            // 注意：UnityWebRequest 的响应头 key 是小写的
+            string lowerName = name.ToLowerInvariant();
+            if (_cachedResponseHeaders.TryGetValue(lowerName, out string value))
+                return value;
+
+            return null;
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest
+        /// </summary>
+        protected override void CreateWebRequest()
+        {
+            _webRequest = CreateUnityWebRequestHead(URL);
+            _webRequest.downloadHandler = null; // HEAD 请求不需要 DownloadHandler
+            ApplyRequestOptions(_args.Timeout, _args.WatchdogTime, _args.Headers);
+        }
+
+        /// <summary>
+        /// 请求成功时的回调
+        /// </summary>
+        protected override void OnRequestSucceed()
+        {
+            var headers = _webRequest.GetResponseHeaders();
+            if (headers != null)
+            {
+                _cachedResponseHeaders = new Dictionary<string, string>(headers.Count, StringComparer.OrdinalIgnoreCase);
+                foreach (var kvp in headers)
+                {
+                    string name = kvp.Key.ToLowerInvariant();
+                    string value = kvp.Value;
+                    _cachedResponseHeaders[name] = value;
+                }
+            }
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestHeadDownloader.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8ed243d707130394aa85e20dee876d8e
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestTextDownloader.cs

@@ -0,0 +1,52 @@
+using System;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// UnityWebRequest 文本下载器
+    /// </summary>
+    /// <remarks>
+    /// 将下载内容解析为 UTF-8 文本字符串。
+    /// </remarks>
+    internal sealed class UnityWebRequestTextDownloader : UnityWebRequestDownloaderBase, IDownloadTextRequest
+    {
+        private readonly DownloadDataRequestArgs _args;
+
+        /// <summary>
+        /// 下载结果（文本字符串）
+        /// </summary>
+        public string Result { get; private set; }
+
+        /// <summary>
+        /// 构造文本下载器
+        /// </summary>
+        /// <param name="args">数据下载参数</param>
+        /// <param name="webRequestCreator">UnityWebRequest 创建器（可选）</param>
+        public UnityWebRequestTextDownloader(DownloadDataRequestArgs args, UnityWebRequestCreator webRequestCreator)
+            : base(args.URL, webRequestCreator)
+        {
+            _args = args;
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest
+        /// </summary>
+        protected override void CreateWebRequest()
+        {
+            var handler = new DownloadHandlerBuffer();
+            _webRequest = CreateUnityWebRequestGet(URL);
+            _webRequest.downloadHandler = handler;
+            _webRequest.disposeDownloadHandlerOnDispose = true;
+            ApplyRequestOptions(_args.Timeout, _args.WatchdogTime, _args.Headers);
+        }
+
+        /// <summary>
+        /// 请求成功时的回调
+        /// </summary>
+        protected override void OnRequestSucceed()
+        {
+            Result = _webRequest.downloadHandler.text;
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestTextDownloader.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 9b0bd3024ca5bae4dbdc05c7af7479df
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/VirtualFileDownloader.cs

@@ -0,0 +1,141 @@
+using System;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 模拟下载器
+    /// </summary>
+    /// <remarks>
+    /// 用于编辑器模式下模拟下载进度，不进行实际网络请求。
+    /// 根据配置的下载速度模拟进度变化。
+    /// </remarks>
+    internal sealed class VirtualFileDownloader : IDownloadFileRequest
+    {
+        private readonly DownloadSimulateRequestArgs _args;
+        private double _lastUpdateTime;
+
+        /// <summary>
+        /// 文件保存路径（模拟下载不需要）
+        /// </summary>
+        public string SavePath
+        {
+            get { return null; }
+        }
+
+        #region 接口实现
+        /// <summary>
+        /// 请求地址
+        /// </summary>
+        public string URL { get; }
+
+        /// <summary>
+        /// 是否完成
+        /// </summary>
+        public bool IsDone
+        {
+            get
+            {
+                PollingRequest();
+                return Status == EDownloadRequestStatus.Succeed
+                    || Status == EDownloadRequestStatus.Failed
+                    || Status == EDownloadRequestStatus.Aborted;
+            }
+        }
+
+        /// <summary>
+        /// 请求状态
+        /// </summary>
+        public EDownloadRequestStatus Status { get; private set; }
+
+        /// <summary>
+        /// 当前下载进度（0f - 1f）
+        /// </summary>
+        public float DownloadProgress { get; private set; }
+
+        /// <summary>
+        /// 当前请求已接收的字节数
+        /// </summary>
+        public long DownloadedBytes { get; private set; }
+
+        /// <summary>
+        /// HTTP 返回码（模拟固定返回 200）
+        /// </summary>
+        public long HttpCode { get; private set; }
+
+        /// <summary>
+        /// 错误信息
+        /// </summary>
+        public string Error { get; private set; }
+        #endregion
+
+        /// <summary>
+        /// 构造模拟下载器
+        /// </summary>
+        /// <param name="args">模拟下载参数</param>
+        public VirtualFileDownloader(DownloadSimulateRequestArgs args)
+        {
+            _args = args;
+            URL = args.URL;
+            Status = EDownloadRequestStatus.None;
+        }
+
+        /// <summary>
+        /// 发起请求
+        /// </summary>
+        public void SendRequest()
+        {
+            if (Status == EDownloadRequestStatus.None)
+            {
+                Status = EDownloadRequestStatus.Running;
+                _lastUpdateTime = TimeUtility.RealtimeSinceStartup;
+            }
+        }
+
+        /// <summary>
+        /// 轮询请求
+        /// </summary>
+        public void PollingRequest()
+        {
+            if (Status != EDownloadRequestStatus.Running)
+                return;
+
+            double currentTime = TimeUtility.RealtimeSinceStartup;
+            double deltaTime = currentTime - _lastUpdateTime;
+            _lastUpdateTime = currentTime;
+
+            // 计算本帧下载的字节数
+            long downloadBytes = (long)(_args.DownloadSpeed * deltaTime);
+            DownloadedBytes += downloadBytes;
+
+            if (_args.FileSize > 0)
+                DownloadProgress = (float)DownloadedBytes / _args.FileSize;
+
+            // 检查是否完成
+            if (DownloadedBytes >= _args.FileSize)
+            {
+                HttpCode = 200;
+                DownloadProgress = 1f;
+                DownloadedBytes = _args.FileSize;
+                Status = EDownloadRequestStatus.Succeed;
+            }
+        }
+
+        /// <summary>
+        /// 中止请求
+        /// </summary>
+        public void AbortRequest()
+        {
+            if (Status == EDownloadRequestStatus.None || Status == EDownloadRequestStatus.Running)
+            {
+                Status = EDownloadRequestStatus.Aborted;
+            }
+        }
+
+        /// <summary>
+        /// 释放资源
+        /// </summary>
+        public void Dispose()
+        {
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/VirtualFileDownloader.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 84daeb1559aadff40b5b5aa5c81d7d64
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/DownloadDefine.cs

@@ -1,118 +0,0 @@
-
-namespace YooAsset
-{
-    /// <summary>
-    /// 下载器结束
-    /// </summary>
-    public struct DownloaderFinishData
-    {
-        /// <summary>
-        /// 所属包裹名称
-        /// </summary>
-        public string PackageName;
-
-        /// <summary>
-        /// 是否成功
-        /// </summary>
-        public bool Succeed;
-    }
-
-    /// <summary>
-    /// 下载器相关的更新数据
-    /// </summary>
-    public struct DownloadUpdateData
-    {
-        /// <summary>
-        /// 所属包裹名称
-        /// </summary>
-        public string PackageName;
-
-        /// <summary>
-        /// 下载进度 (0-1f)
-        /// </summary>
-        public float Progress;
-
-        /// <summary>
-        /// 下载文件总数
-        /// </summary>
-        public int TotalDownloadCount;
-
-        /// <summary>
-        /// 当前完成的下载文件数量
-        /// </summary>
-        public int CurrentDownloadCount;
-
-        /// <summary>
-        /// 下载数据总大小（单位：字节）
-        /// </summary>
-        public long TotalDownloadBytes;
-
-        /// <summary>
-        /// 当前完成的下载数据大小（单位：字节）
-        /// </summary>
-        public long CurrentDownloadBytes;
-    }
-
-    /// <summary>
-    /// 下载器相关的错误数据
-    /// </summary>
-    public struct DownloadErrorData
-    {
-        /// <summary>
-        /// 所属包裹名称
-        /// </summary>
-        public string PackageName;
-
-        /// <summary>
-        /// 下载失败的文件名称
-        /// </summary>
-        public string FileName;
-
-        /// <summary>
-        /// 错误信息
-        /// </summary>
-        public string ErrorInfo;
-    }
-
-    /// <summary>
-    /// 下载器相关的文件数据
-    /// </summary>
-    public struct DownloadFileData
-    {
-        /// <summary>
-        /// 所属包裹名称
-        /// </summary>
-        public string PackageName;
-
-        /// <summary>
-        /// 下载的文件名称
-        /// </summary>
-        public string FileName;
-
-        /// <summary>
-        /// 下载的文件大小
-        /// </summary>
-        public long FileSize;
-    }
-
-    /// <summary>
-    /// 导入文件的信息
-    /// </summary>
-    public struct ImportFileInfo
-    {
-        /// <summary>
-        /// 本地文件路径
-        /// </summary>
-        public string FilePath;
-
-        /// <summary>
-        /// 资源包名称
-        /// </summary>
-        public string BundleName;
-
-        /// <summary>
-        /// 资源包GUID
-        /// </summary>
-        public string BundleGUID;
-    }
-}

Assets/YooAsset/Runtime/DownloadSystem/DownloadSystemDefine.cs

@@ -0,0 +1,349 @@
+using System.Collections.Generic;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 导入的资源包信息
+    /// </summary>
+    public struct ImportBundleInfo
+    {
+        /// <summary>
+        /// 本地文件路径
+        /// </summary>
+        public string FilePath;
+
+        /// <summary>
+        /// 资源包名称
+        /// </summary>
+        public string BundleName;
+
+        /// <summary>
+        /// 资源包GUID
+        /// </summary>
+        public string BundleGUID;
+    }
+
+
+    /// <summary>
+    /// 下载请求状态
+    /// </summary>
+    internal enum EDownloadRequestStatus
+    {
+        /// <summary>
+        /// 未开始
+        /// </summary>
+        None,
+
+        /// <summary>
+        /// 进行中
+        /// </summary>
+        Running,
+
+        /// <summary>
+        /// 已成功
+        /// </summary>
+        Succeed,
+
+        /// <summary>
+        /// 已失败
+        /// </summary>
+        Failed,
+
+        /// <summary>
+        /// 已中止
+        /// </summary>
+        Aborted,
+    }
+
+    /// <summary>
+    /// 文件下载请求参数
+    /// </summary>
+    /// <remarks>
+    /// 用于将下载内容保存到本地文件的请求配置。
+    /// 支持断点续传和追加写入模式。
+    /// </remarks>
+    internal struct DownloadFileRequestArgs
+    {
+        /// <summary>
+        /// 请求地址
+        /// </summary>
+        public readonly string URL;
+
+        /// <summary>
+        /// 响应的超时时间（单位：秒）
+        /// </summary>
+        /// <remarks>
+        /// 当 Timeout 设置为 0 时，不应用超时。
+        /// 设置的超时值可能应用于Android上的每个URL重定向，这可能会导致响应时间增加。
+        /// </remarks>
+        public readonly int Timeout;
+
+        /// <summary>
+        /// 看门狗超时时间（单位：秒）
+        /// </summary>
+        /// <remarks>
+        /// 用于监控下载任务的数据接收情况。
+        /// 规则说明：
+        /// 1. 当设置值为 0 时，表示禁用看门狗监控。
+        /// 2. 每次接收到下载数据时，看门狗计时器会重置。
+        /// 3. 若在设定的时间范围内未收到任何数据，任务将被自动终止。
+        /// </remarks>
+        public readonly int WatchdogTime;
+
+        /// <summary>
+        /// 文件保存路径
+        /// </summary>
+        public readonly string SavePath;
+
+        /// <summary>
+        /// 是否追加写入文件
+        /// </summary>
+        /// <remarks>
+        /// 配合 ResumeFromBytes 使用，用于断点续传场景。
+        /// </remarks>
+        public readonly bool AppendToFile;
+
+        /// <summary>
+        /// 中止请求时是否删除目标文件
+        /// </summary>
+        public readonly bool RemoveFileOnAbort;
+
+        /// <summary>
+        /// 断点续传的起始字节（小于等于 0 表示不启用）
+        /// </summary>
+        /// <remarks>
+        /// 推荐由后端自动设置 Range 请求头："bytes={ResumeFromBytes}-"。
+        /// </remarks>
+        public readonly long ResumeFromBytes;
+
+        /// <summary>
+        /// 自定义请求头（可选）
+        /// </summary>
+        public Dictionary<string, string> Headers;
+
+        /// <summary>
+        /// 构造文件下载请求参数
+        /// </summary>
+        public DownloadFileRequestArgs(
+            string url,
+            string savePath,
+            int timeout,
+            int watchdogTime,
+            bool appendToFile = false,
+            bool removeFileOnAbort = true,
+            long resumeFromBytes = 0)
+        {
+            URL = url;
+            SavePath = savePath;
+            Timeout = timeout;
+            WatchdogTime = watchdogTime;
+            AppendToFile = appendToFile;
+            RemoveFileOnAbort = removeFileOnAbort;
+            ResumeFromBytes = resumeFromBytes;
+            Headers = null;
+        }
+
+        /// <summary>
+        /// 添加请求头数据
+        /// </summary>
+        public void AddRequestHeader(string name, string value)
+        {
+            if (Headers == null)
+                Headers = new Dictionary<string, string>(10);
+            Headers.Add(name, value);
+        }
+    }
+
+    /// <summary>
+    /// 数据下载请求参数（通用）
+    /// </summary>
+    /// <remarks>
+    /// 用于下载到内存的请求配置。
+    /// 可用于字节数组（bytes）或文本（text）下载。
+    /// </remarks>
+    internal struct DownloadDataRequestArgs
+    {
+        /// <summary>
+        /// 请求地址
+        /// </summary>
+        public readonly string URL;
+
+        /// <summary>
+        /// 响应的超时时间（单位：秒）
+        /// </summary>
+        /// <remarks>
+        /// 当 Timeout 设置为 0 时，不应用超时。
+        /// 设置的超时值可能应用于Android上的每个URL重定向，这可能会导致响应时间增加。
+        /// </remarks>
+        public readonly int Timeout;
+
+        /// <summary>
+        /// 看门狗超时时间（单位：秒）
+        /// </summary>
+        /// <remarks>
+        /// 用于监控下载任务的数据接收情况。
+        /// 规则说明：
+        /// 1. 当设置值为 0 时，表示禁用看门狗监控。
+        /// 2. 每次接收到下载数据时，看门狗计时器会重置。
+        /// 3. 若在设定的时间范围内未收到任何数据，任务将被自动终止。
+        /// </remarks>
+        public readonly int WatchdogTime;
+
+        /// <summary>
+        /// 自定义请求头（可选）
+        /// </summary>
+        public Dictionary<string, string> Headers;
+
+        /// <summary>
+        /// 构造数据下载请求参数
+        /// </summary>
+        /// <param name="url">请求地址</param>
+        /// <param name="options">通用请求参数</param>
+        public DownloadDataRequestArgs(string url, int timeout, int watchdogTime)
+        {
+            URL = url;
+            Timeout = timeout;
+            WatchdogTime = watchdogTime;
+            Headers = null;
+        }
+
+        /// <summary>
+        /// 添加请求头数据
+        /// </summary>
+        public void AddRequestHeader(string name, string value)
+        {
+            if (Headers == null)
+                Headers = new Dictionary<string, string>(10);
+            Headers.Add(name, value);
+        }
+    }
+
+    /// <summary>
+    /// AssetBundle 下载请求参数
+    /// </summary>
+    /// <remarks>
+    /// 用于下载并加载 Unity AssetBundle 的请求配置。
+    /// 支持 Unity 内置缓存机制和 CRC 校验。
+    /// </remarks>
+    internal struct DownloadAssetBundleRequestArgs
+    {
+        /// <summary>
+        /// 请求地址
+        /// </summary>
+        public readonly string URL;
+
+        /// <summary>
+        /// 响应的超时时间（单位：秒）
+        /// </summary>
+        /// <remarks>
+        /// 当 Timeout 设置为 0 时，不应用超时。
+        /// 设置的超时值可能应用于Android上的每个URL重定向，这可能会导致响应时间增加。
+        /// </remarks>
+        public readonly int Timeout;
+
+        /// <summary>
+        /// 看门狗超时时间（单位：秒）
+        /// </summary>
+        /// <remarks>
+        /// 用于监控下载任务的数据接收情况。
+        /// 规则说明：
+        /// 1. 当设置值为 0 时，表示禁用看门狗监控。
+        /// 2. 每次接收到下载数据时，看门狗计时器会重置。
+        /// 3. 若在设定的时间范围内未收到任何数据，任务将被自动终止。
+        /// </remarks>
+        public readonly int WatchdogTime;
+
+        /// <summary>
+        /// 禁用 Unity 的网络缓存
+        /// </summary>
+        public readonly bool DisableUnityWebCache;
+
+        /// <summary>
+        /// AssetBundle 文件哈希（用于 UnityWebRequest 的缓存）
+        /// </summary>
+        /// <remarks>
+        /// 仅当 DisableUnityWebCache 为 false 时需要。
+        /// </remarks>
+        public readonly string FileHash;
+
+        /// <summary>
+        /// Unity CRC 校验值
+        /// </summary>
+        public readonly uint UnityCRC;
+
+        /// <summary>
+        /// 自定义请求头（可选）
+        /// </summary>
+        public Dictionary<string, string> Headers;
+
+        /// <summary>
+        /// 构造 AssetBundle 下载请求参数
+        /// </summary>
+        public DownloadAssetBundleRequestArgs(
+            string url,
+            int timeout,
+            int watchdogTime,
+            bool disableUnityWebCache = true,
+            string fileHash = null,
+            uint unityCrc = 0)
+        {
+            URL = url;
+            Timeout = timeout;
+            WatchdogTime = watchdogTime;
+            DisableUnityWebCache = disableUnityWebCache;
+            FileHash = fileHash;
+            UnityCRC = unityCrc;
+            Headers = null;
+        }
+
+        /// <summary>
+        /// 添加请求头数据
+        /// </summary>
+        public void AddRequestHeader(string name, string value)
+        {
+            if (Headers == null)
+                Headers = new Dictionary<string, string>(10);
+            Headers.Add(name, value);
+        }
+    }
+
+    /// <summary>
+    /// 模拟下载请求参数
+    /// </summary>
+    /// <remarks>
+    /// 用于编辑器模式下模拟下载进度，不进行实际网络请求。
+    /// </remarks>
+    internal struct DownloadSimulateRequestArgs
+    {
+        /// <summary>
+        /// 请求地址（仅用于标识）
+        /// </summary>
+        public readonly string URL;
+
+        /// <summary>
+        /// 模拟的文件大小（字节）
+        /// </summary>
+        public readonly long FileSize;
+
+        /// <summary>
+        /// 模拟的下载速度（字节/秒）
+        /// </summary>
+        /// <remarks>
+        /// 用于计算模拟的下载进度。
+        /// </remarks>
+        public readonly long DownloadSpeed;
+
+        /// <summary>
+        /// 构造模拟下载请求参数
+        /// </summary>
+        /// <param name="url">请求地址（仅用于标识）</param>
+        /// <param name="fileSize">模拟的文件大小（字节）</param>
+        /// <param name="downloadSpeed">模拟的下载速度（字节/秒），默认 1MB/s</param>
+        public DownloadSimulateRequestArgs(string url, long fileSize, long downloadSpeed = 1024 * 1024)
+        {
+            URL = url;
+            FileSize = fileSize;
+            DownloadSpeed = downloadSpeed > 0 ? downloadSpeed : 1024 * 1024;
+        }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/DownloadSystemDefine.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: eb0480e877454f7c944f66a01646b6d4
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/DownloadSystemHelper.cs

@@ -3,32 +3,8 @@ using UnityEngine;
 
 namespace YooAsset
 {
-    /// <summary>
-    /// 自定义下载器的请求委托
-    /// </summary>
-    public delegate UnityWebRequest UnityWebRequestDelegate(string url);
-
     internal class DownloadSystemHelper
     {
-#if UNITY_EDITOR
-        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
-        private static void OnRuntimeInitialize()
-        {
-            UnityWebRequestCreater = null;
-        }
-#endif
-
-        public static UnityWebRequestDelegate UnityWebRequestCreater = null;
-        public static UnityWebRequest NewUnityWebRequestGet(string requestURL)
-        {
-            UnityWebRequest webRequest;
-            if (UnityWebRequestCreater != null)
-                webRequest = UnityWebRequestCreater.Invoke(requestURL);
-            else
-                webRequest = new UnityWebRequest(requestURL, UnityWebRequest.kHttpVerbGET);
-            return webRequest;
-        }
-
         /// <summary>
         /// 获取WWW加载本地资源的路径
         /// </summary>
@@ -81,7 +57,7 @@ namespace YooAsset
 #elif UNITY_STANDALONE_LINUX
             url = StringUtility.Format("file:///root/{0}", path);
 #else
-            throw new System.NotImplementedException();
+            throw new System.NotSupportedException($"[{nameof(DownloadSystemHelper.ConvertToWWWPath)}] Platform '{UnityEngine.Application.platform}' is not supported.");
 #endif
 
             // For some special cases when users have special characters in their devices, url paths can not be identified correctly.
@@ -94,12 +70,16 @@ namespace YooAsset
         public static bool IsRequestLocalFile(string url)
         {
             //TODO UNITY_STANDALONE_OSX平台目前无法确定
+
+            // 本地文件传输协议
             if (url.StartsWith("file:"))
                 return true;
+
+            // JAR文件协议
             if (url.StartsWith("jar:file:"))
                 return true;
 
             return false;
         }
     }
-}
+}

Assets/YooAsset/Runtime/DownloadSystem/Interface.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: e7f5776546411834d9ed949d54a6f241
+guid: d724672f4d6f24b4db435d10eef6c40d
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}

Assets/YooAsset/Runtime/DownloadSystem/Interface/IDownloadBackend.cs

@@ -0,0 +1,78 @@
+using System;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 下载后台接口
+    /// </summary>
+    /// <remarks>
+    /// 不同网络库（UnityWebRequest / BestHTTP / 自研）实现该接口，用于创建具体下载请求。
+    /// 每个后台实例是独立的，不共享全局状态。
+    /// </remarks>
+    internal interface IDownloadBackend : IDisposable
+    {
+        /// <summary>
+        /// 后台名称（用于日志与调试）
+        /// </summary>
+        string Name { get; }
+
+        /// <summary>
+        /// 驱动更新
+        /// </summary>
+        /// <remarks>
+        /// 部分第三方网络库需要在 Unity 主线程中周期性调用 Update 进行驱动。
+        /// 不需要驱动的后台可实现为空方法。
+        /// </remarks>
+        void Update();
+
+        /// <summary>
+        /// 创建 HEAD 请求
+        /// </summary>
+        /// <remarks>
+        /// 仅获取响应头信息，不下载实际内容。
+        /// 用于检查资源是否存在、获取资源大小、检查缓存有效性等场景。
+        /// </remarks>
+        /// <param name="args">数据请求参数</param>
+        /// <returns>HEAD 请求实例</returns>
+        IDownloadHeadRequest CreateHeadRequest(DownloadDataRequestArgs args);
+
+        /// <summary>
+        /// 创建文件下载请求
+        /// </summary>
+        /// <param name="args">文件下载参数</param>
+        /// <returns>文件下载请求实例</returns>
+        IDownloadFileRequest CreateFileRequest(DownloadFileRequestArgs args);
+
+        /// <summary>
+        /// 创建内存下载请求（字节数组）
+        /// </summary>
+        /// <param name="args">数据下载参数</param>
+        /// <returns>字节下载请求实例</returns>
+        IDownloadBytesRequest CreateBytesRequest(DownloadDataRequestArgs args);
+
+        /// <summary>
+        /// 创建文本下载请求
+        /// </summary>
+        /// <param name="args">数据下载参数</param>
+        /// <returns>文本下载请求实例</returns>
+        IDownloadTextRequest CreateTextRequest(DownloadDataRequestArgs args);
+
+        /// <summary>
+        /// 创建 AssetBundle 下载请求
+        /// </summary>
+        /// <param name="args">AssetBundle 下载参数</param>
+        /// <returns>AssetBundle 下载请求实例</returns>
+        IDownloadAssetBundleRequest CreateAssetBundleRequest(DownloadAssetBundleRequestArgs args);
+
+        /// <summary>
+        /// 创建模拟下载请求
+        /// </summary>
+        /// <remarks>
+        /// 用于编辑器模式下模拟下载进度，不进行实际网络请求。
+        /// 可用于测试下载流程和 UI 展示。
+        /// </remarks>
+        /// <param name="args">模拟下载参数</param>
+        /// <returns>模拟下载请求实例</returns>
+        IDownloadFileRequest CreateSimulateRequest(DownloadSimulateRequestArgs args);
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/Interface/IDownloadBackend.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: e88c026ebbfb40258aad52ad1c2feb70
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/Interface/IDownloadRequest.cs

@@ -0,0 +1,194 @@
+using System;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 可轮询的下载请求接口
+    /// </summary>
+    /// <remarks>
+    /// 上层通常会在每帧轮询 Status IsDone，并在完成后读取结果。
+    /// </remarks>
+    internal interface IDownloadRequest : IDisposable
+    {
+        /// <summary>
+        /// 请求地址
+        /// </summary>
+        string URL { get; }
+
+        /// <summary>
+        /// 是否完成（成功/失败/中止）
+        /// </summary>
+        bool IsDone { get; }
+
+        /// <summary>
+        /// 请求状态
+        /// </summary>
+        EDownloadRequestStatus Status { get; }
+
+        /// <summary>
+        /// 当前下载进度（0f - 1f）
+        /// </summary>
+        /// <remarks>
+        /// 部分情况下无法准确获取总长度，可返回 0。
+        /// </remarks>
+        float DownloadProgress { get; }
+
+        /// <summary>
+        /// 当前请求已接收的字节数
+        /// </summary>
+        /// <remarks>
+        /// 断点续传场景下，该值仅表示"本次请求新增下载的字节数"，不包含已存在的本地文件长度。
+        /// </remarks>
+        long DownloadedBytes { get; }
+
+        /// <summary>
+        /// HTTP 返回码
+        /// </summary>
+        /// <remarks>
+        /// 非 HTTP 协议可返回 0。使用 long 类型以兼容各种协议的返回码。
+        /// </remarks>
+        long HttpCode { get; }
+
+        /// <summary>
+        /// 错误信息
+        /// </summary>
+        /// <remarks>
+        /// 失败时不为空。
+        /// </remarks>
+        string Error { get; }
+
+        /// <summary>
+        /// 发起请求
+        /// </summary>
+        void SendRequest();
+
+        /// <summary>
+        /// 轮询请求
+        /// </summary>
+        void PollingRequest();
+
+        /// <summary>
+        /// 中止请求
+        /// </summary>
+        void AbortRequest();
+    }
+
+    /// <summary>
+    /// HEAD 请求接口（仅获取响应头）
+    /// </summary>
+    /// <remarks>
+    /// 用于检查资源是否存在、获取资源大小、检查缓存有效性等场景。
+    /// 不下载实际内容，仅获取响应头信息。
+    /// </remarks>
+    internal interface IDownloadHeadRequest : IDownloadRequest
+    {
+        /// <summary>
+        /// 获取 ETag 响应头
+        /// </summary>
+        /// <remarks>
+        /// 用于缓存验证，如果服务器未返回则为 null。
+        /// </remarks>
+        string ETag { get; }
+
+        /// <summary>
+        /// 获取 Last-Modified 响应头
+        /// </summary>
+        /// <remarks>
+        /// 资源最后修改时间，如果服务器未返回则为 null。
+        /// </remarks>
+        string LastModified { get; }
+
+        /// <summary>
+        /// 获取 Content-Type 响应头
+        /// </summary>
+        /// <remarks>
+        /// 资源的 MIME 类型，如果服务器未返回则为 null。
+        /// </remarks>
+        string ContentType { get; }
+
+        /// <summary>
+        /// 预期下载的总字节数（Content-Length）
+        /// </summary>
+        /// <remarks>
+        /// 从响应头 Content-Length 获取。
+        /// 如果服务器未返回或请求未完成，返回 -1。
+        /// 用于更准确的进度计算。
+        /// </remarks>
+        long ContentLength { get; }
+
+        /// <summary>
+        /// 获取响应头信息
+        /// </summary>
+        /// <param name="name">响应头名称（不区分大小写）</param>
+        /// <returns>响应头的值，如果不存在或请求未完成则返回 null</returns>
+        /// <remarks>
+        /// 常用响应头：Content-Length、Content-Type、ETag、Last-Modified 等。
+        /// </remarks>
+        string GetResponseHeader(string name);
+    }
+
+    /// <summary>
+    /// 文件下载请求接口
+    /// </summary>
+    /// <remarks>
+    /// 将下载内容保存到指定的本地文件路径。
+    /// </remarks>
+    internal interface IDownloadFileRequest : IDownloadRequest
+    {
+        /// <summary>
+        /// 文件保存路径
+        /// </summary>
+        string SavePath { get; }
+    }
+
+    /// <summary>
+    /// 内存下载请求接口（字节数组）
+    /// </summary>
+    /// <remarks>
+    /// 将下载内容保存到内存中的字节数组。
+    /// </remarks>
+    internal interface IDownloadBytesRequest : IDownloadRequest
+    {
+        /// <summary>
+        /// 下载结果（字节数组）
+        /// </summary>
+        /// <remarks>
+        /// 仅在请求成功时可用，失败时为 null。
+        /// </remarks>
+        byte[] Result { get; }
+    }
+
+    /// <summary>
+    /// 文本下载请求接口
+    /// </summary>
+    /// <remarks>
+    /// 将下载内容解析为 UTF-8 文本字符串。
+    /// </remarks>
+    internal interface IDownloadTextRequest : IDownloadRequest
+    {
+        /// <summary>
+        /// 下载结果（文本字符串）
+        /// </summary>
+        /// <remarks>
+        /// 仅在请求成功时可用，失败时为 null。
+        /// </remarks>
+        string Result { get; }
+    }
+
+    /// <summary>
+    /// AssetBundle 下载请求接口
+    /// </summary>
+    /// <remarks>
+    /// 下载并加载 Unity AssetBundle 资源包。
+    /// </remarks>
+    internal interface IDownloadAssetBundleRequest : IDownloadRequest
+    {
+        /// <summary>
+        /// 下载结果（AssetBundle 对象）
+        /// </summary>
+        /// <remarks>
+        /// 仅在请求成功时可用，失败时为 null。
+        /// </remarks>
+        UnityEngine.AssetBundle Result { get; }
+    }
+}

Assets/YooAsset/Runtime/DownloadSystem/Interface/IDownloadRequest.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 2a2aafeb309243f4959394a97d66b19f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityAssetBundleRequestOperation.cs

@@ -1,113 +0,0 @@
-using UnityEngine.Networking;
-using UnityEngine;
-
-namespace YooAsset
-{
-    internal class UnityAssetBundleRequestOperation : UnityWebRequestOperation
-    {
-        protected enum ESteps
-        {
-            None,
-            CreateRequest,
-            Download,
-            Done,
-        }
-
-        private UnityWebRequestAsyncOperation _requestOperation;
-        private DownloadHandlerAssetBundle _downloadhandler;
-        private readonly PackageBundle _packageBundle;
-        private readonly bool _disableUnityWebCache;
-        private ESteps _steps = ESteps.None;
-
-        /// <summary>
-        /// 请求结果
-        /// </summary>
-        public AssetBundle Result { private set; get; }
-
-        internal UnityAssetBundleRequestOperation(PackageBundle packageBundle, bool disableUnityWebCache, string url) : base(url)
-        {
-            _packageBundle = packageBundle;
-            _disableUnityWebCache = disableUnityWebCache;
-        }
-        internal override void InternalStart()
-        {
-            _steps = ESteps.CreateRequest;
-        }
-        internal override void InternalUpdate()
-        {
-            if (_steps == ESteps.None || _steps == ESteps.Done)
-                return;
-
-            if (_steps == ESteps.CreateRequest)
-            {
-                CreateWebRequest();
-                _steps = ESteps.Download;
-            }
-
-            if (_steps == ESteps.Download)
-            {
-                DownloadProgress = _webRequest.downloadProgress;
-                DownloadedBytes = (long)_webRequest.downloadedBytes;
-                Progress = _requestOperation.progress;
-                if (_requestOperation.isDone == false)
-                    return;
-
-                if (CheckRequestResult())
-                {
-                    AssetBundle assetBundle = _downloadhandler.assetBundle;
-                    if (assetBundle == null)
-                    {
-                        _steps = ESteps.Done;
-                        Status = EOperationStatus.Failed;
-                        Error = $"URL : {_requestURL} Download handler asset bundle object is null !";
-                    }
-                    else
-                    {
-                        _steps = ESteps.Done;
-                        Result = assetBundle;
-                        Status = EOperationStatus.Succeed;
-                    }
-                }
-                else
-                {
-                    _steps = ESteps.Done;
-                    Status = EOperationStatus.Failed;
-                }
-
-                // 注意：最终释放请求器
-                DisposeRequest();
-            }
-        }
-
-        private void CreateWebRequest()
-        {
-            _downloadhandler = CreateWebDownloadHandler();
-            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
-            _webRequest.downloadHandler = _downloadhandler;
-            _webRequest.disposeDownloadHandlerOnDispose = true;
-            _requestOperation = _webRequest.SendWebRequest();
-        }
-        private DownloadHandlerAssetBundle CreateWebDownloadHandler()
-        {
-            if (_disableUnityWebCache)
-            {
-                var downloadhandler = new DownloadHandlerAssetBundle(_requestURL, _packageBundle.UnityCRC);
-#if UNITY_2020_3_OR_NEWER
-                downloadhandler.autoLoadAssetBundle = false;
-#endif
-                return downloadhandler;
-            }
-            else
-            {
-                // 注意：优先从浏览器缓存里获取文件
-                // The file hash defining the version of the asset bundle.
-                Hash128 fileHash = Hash128.Parse(_packageBundle.FileHash);
-                var downloadhandler = new DownloadHandlerAssetBundle(_requestURL, fileHash, _packageBundle.UnityCRC);
-#if UNITY_2020_3_OR_NEWER
-                downloadhandler.autoLoadAssetBundle = false;
-#endif
-                return downloadhandler;
-            }
-        }
-    }
-}

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityVirtualBundleRequestOperation.cs

@@ -1,65 +0,0 @@
-using UnityEngine.Networking;
-using UnityEngine;
-
-namespace YooAsset
-{
-    internal class UnityVirtualBundleRequestOperation : UnityWebRequestOperation
-    {
-        protected enum ESteps
-        {
-            None,
-            Download,
-            Done,
-        }
-
-        private readonly PackageBundle _bundle;
-        private readonly int _downloadSpeed;
-        private ESteps _steps = ESteps.None;
-
-        internal UnityVirtualBundleRequestOperation(PackageBundle packageBundle, int downloadSpeed, string url) : base(url)
-        {
-            _bundle = packageBundle;
-            _downloadSpeed = downloadSpeed;
-        }
-        internal override void InternalStart()
-        {
-            _steps = ESteps.Download;
-        }
-        internal override void InternalUpdate()
-        {
-            if (_steps == ESteps.None || _steps == ESteps.Done)
-                return;
-
-            if (_steps == ESteps.Download)
-            {
-                // 模拟下载进度
-                float progress = 0;
-                if (DownloadedBytes > 0)
-                    progress = DownloadedBytes / _bundle.FileSize;
-                long downloadBytes = (long)((double)_downloadSpeed * Time.deltaTime);
-                
-                Progress = progress;
-                DownloadProgress = progress;
-                DownloadedBytes += downloadBytes;
-                if (DownloadedBytes < _bundle.FileSize)
-                    return;
-
-                Progress = 1f;
-                DownloadProgress = 1f;
-                DownloadedBytes = _bundle.FileSize;
-
-                _steps = ESteps.Done;
-                Status = EOperationStatus.Succeed;
-            }
-        }
-        internal override void InternalWaitForAsyncComplete()
-        {
-            if (_steps != ESteps.Done)
-            {
-                _steps = ESteps.Done;
-                Status = EOperationStatus.Failed;
-                Error = $"Try load bundle {_bundle.BundleName} from remote !";
-            }
-        }
-    }
-}

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebCacheRequestOperation.cs

@@ -1,89 +0,0 @@
-using System.Collections;
-using System.Collections.Generic;
-using UnityEngine.Networking;
-using UnityEngine;
-
-namespace YooAsset
-{
-    internal class UnityWebCacheRequestOperation : UnityWebRequestOperation
-    {
-        protected enum ESteps
-        {
-            None,
-            CreateRequest,
-            Download,
-            Done,
-        }
-
-        private UnityWebRequestAsyncOperation _requestOperation;
-        private readonly Dictionary<string, string> _headers = new Dictionary<string, string>();
-        private ESteps _steps = ESteps.None;
-
-
-        internal UnityWebCacheRequestOperation(string url) : base(url)
-        {
-        }
-        internal override void InternalStart()
-        {
-            _steps = ESteps.CreateRequest;
-        }
-        internal override void InternalUpdate()
-        {
-            if (_steps == ESteps.None || _steps == ESteps.Done)
-                return;
-
-            if (_steps == ESteps.CreateRequest)
-            {
-                CreateWebRequest();
-                _steps = ESteps.Download;
-            }
-
-            if (_steps == ESteps.Download)
-            {
-                DownloadProgress = _webRequest.downloadProgress;
-                DownloadedBytes = (long)_webRequest.downloadedBytes;
-                Progress = _requestOperation.progress;
-                if (_requestOperation.isDone == false)
-                    return;
-
-                if (CheckRequestResult())
-                {
-                    _steps = ESteps.Done;
-                    Status = EOperationStatus.Succeed;
-                }
-                else
-                {
-                    _steps = ESteps.Done;
-                    Status = EOperationStatus.Failed;
-                }
-
-                // 注意：最终释放请求器
-                DisposeRequest();
-            }
-        }
-
-        /// <summary>
-        /// 设置请求头信息
-        /// </summary>
-        public void SetRequestHeader(string name, string value)
-        {
-            _headers.Add(name, value);
-        }
-
-        private void CreateWebRequest()
-        {
-            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
-            _webRequest.disposeDownloadHandlerOnDispose = true;
-
-            // 设置消息头
-            foreach (var keyValuePair in _headers)
-            {
-                string name = keyValuePair.Key;
-                string value = keyValuePair.Value;
-                _webRequest.SetRequestHeader(name, value);
-            }
-
-            _requestOperation = _webRequest.SendWebRequest();
-        }
-    }
-}

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebDataRequestOperation.cs

@@ -1,96 +0,0 @@
-using UnityEngine.Networking;
-using UnityEngine;
-
-namespace YooAsset
-{
-    internal class UnityWebDataRequestOperation : UnityWebRequestOperation
-    {
-        protected enum ESteps
-        {
-            None,
-            CreateRequest,
-            Download,
-            Done,
-        }
-
-        private UnityWebRequestAsyncOperation _requestOperation;
-        private ESteps _steps = ESteps.None;
-
-        /// <summary>
-        /// 响应的超时时间（单位：秒），在经过Timeout的秒数后尝试中止。
-        /// 注意：当Timeout设置为0时，不会应用超时。
-        /// 注意：设置的超时值可能应用于Android上的每个URL重定向，这可能会导致响应时间增加。
-        /// </summary>
-        private readonly int _timeout;
-
-        /// <summary>
-        /// 请求结果
-        /// </summary>
-        public byte[] Result { private set; get; }
-
-
-        internal UnityWebDataRequestOperation(string url, int timeout) : base(url)
-        {
-            _timeout = timeout;
-        }
-        internal override void InternalStart()
-        {
-            _steps = ESteps.CreateRequest;
-        }
-        internal override void InternalUpdate()
-        {
-            if (_steps == ESteps.None || _steps == ESteps.Done)
-                return;
-
-            if (_steps == ESteps.CreateRequest)
-            {
-                CreateWebRequest();
-                _steps = ESteps.Download;
-            }
-
-            if (_steps == ESteps.Download)
-            {
-                DownloadProgress = _webRequest.downloadProgress;
-                DownloadedBytes = (long)_webRequest.downloadedBytes;
-                Progress = _requestOperation.progress;
-                if (_requestOperation.isDone == false)
-                    return;
-
-                if (CheckRequestResult())
-                {
-                    var fileData = _webRequest.downloadHandler.data;
-                    if (fileData == null || fileData.Length == 0)
-                    {
-                        _steps = ESteps.Done;
-                        Status = EOperationStatus.Failed;
-                        Error = $"URL : {_requestURL} Download handler data is null or empty !";
-                    }
-                    else
-                    {
-                        _steps = ESteps.Done;
-                        Result = fileData;
-                        Status = EOperationStatus.Succeed;
-                    }
-                }
-                else
-                {
-                    _steps = ESteps.Done;
-                    Status = EOperationStatus.Failed;
-                }
-
-                // 注意：最终释放请求器
-                DisposeRequest();
-            }
-        }
-
-        private void CreateWebRequest()
-        {
-            DownloadHandlerBuffer handler = new DownloadHandlerBuffer();
-            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
-            _webRequest.timeout = _timeout;
-            _webRequest.downloadHandler = handler;
-            _webRequest.disposeDownloadHandlerOnDispose = true;
-            _requestOperation = _webRequest.SendWebRequest();
-        }
-    }
-}

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebDataRequestOperation.cs.meta

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: b7557eb146572de49a1ec9b3f3c0b706
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebFileRequestOperation.cs

@@ -1,83 +0,0 @@
-using UnityEngine.Networking;
-using UnityEngine;
-
-namespace YooAsset
-{
-    internal class UnityWebFileRequestOperation : UnityWebRequestOperation
-    {
-        protected enum ESteps
-        {
-            None,
-            CreateRequest,
-            Download,
-            Done,
-        }
-
-        private UnityWebRequestAsyncOperation _requestOperation;
-        private readonly string _fileSavePath;
-        private ESteps _steps = ESteps.None;
-
-        /// <summary>
-        /// 响应的超时时间（单位：秒），在经过Timeout的秒数后尝试中止。
-        /// 注意：当Timeout设置为0时，不会应用超时。
-        /// 注意：设置的超时值可能应用于Android上的每个URL重定向，这可能会导致响应时间增加。
-        /// </summary>
-        private readonly int _timeout;
-
-
-        internal UnityWebFileRequestOperation(string url, string fileSavePath, int timeout) : base(url)
-        {
-            _fileSavePath = fileSavePath;
-            _timeout = timeout;
-        }
-        internal override void InternalStart()
-        {
-            _steps = ESteps.CreateRequest;
-        }
-        internal override void InternalUpdate()
-        {
-            if (_steps == ESteps.None || _steps == ESteps.Done)
-                return;
-
-            if (_steps == ESteps.CreateRequest)
-            {
-                CreateWebRequest();
-                _steps = ESteps.Download;
-            }
-
-            if (_steps == ESteps.Download)
-            {
-                DownloadProgress = _webRequest.downloadProgress;
-                DownloadedBytes = (long)_webRequest.downloadedBytes;
-                Progress = _requestOperation.progress;
-                if (_requestOperation.isDone == false)
-                    return;
-
-                if (CheckRequestResult())
-                {
-                    _steps = ESteps.Done;
-                    Status = EOperationStatus.Succeed;
-                }
-                else
-                {
-                    _steps = ESteps.Done;
-                    Status = EOperationStatus.Failed;
-                }
-
-                // 注意：最终释放请求器
-                DisposeRequest();
-            }
-        }
-
-        private void CreateWebRequest()
-        {
-            DownloadHandlerFile handler = new DownloadHandlerFile(_fileSavePath);
-            handler.removeFileOnAbort = true;
-            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
-            _webRequest.timeout = _timeout;
-            _webRequest.downloadHandler = handler;
-            _webRequest.disposeDownloadHandlerOnDispose = true;
-            _requestOperation = _webRequest.SendWebRequest();
-        }
-    }
-}

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebFileRequestOperation.cs.meta

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 2ab5f2486d06e2642ba7aa9c9623430e
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebRequestOperation.cs

@@ -1,98 +0,0 @@
-using System;
-using UnityEngine.Networking;
-using UnityEngine;
-
-namespace YooAsset
-{
-    internal abstract class UnityWebRequestOperation : AsyncOperationBase
-    {
-        protected UnityWebRequest _webRequest;
-        protected readonly string _requestURL;
-        private bool _isAbort = false;
-
-        /// <summary>
-        /// HTTP返回码
-        /// </summary>
-        public long HttpCode { private set; get; }
-
-        /// <summary>
-        /// 当前下载的字节数
-        /// </summary>
-        public long DownloadedBytes { protected set; get; }
-
-        /// <summary>
-        /// 当前下载进度（0f - 1f）
-        /// </summary>
-        public float DownloadProgress { protected set; get; }
-
-        /// <summary>
-        /// 请求的URL地址
-        /// </summary>
-        public string URL
-        {
-            get { return _requestURL; }
-        }
-
-        internal UnityWebRequestOperation(string url)
-        {
-            _requestURL = url;
-        }
-        internal override void InternalAbort()
-        {
-            //TODO
-            // 1. 编辑器下停止运行游戏的时候主动终止下载任务
-            // 2. 真机上销毁包裹的时候主动终止下载任务
-            if (_isAbort == false)
-            {
-                if (_webRequest != null)
-                {
-                    _webRequest.Abort();
-                    _isAbort = true;
-                }
-            }
-        }
-
-        /// <summary>
-        /// 释放下载器
-        /// </summary>
-        protected void DisposeRequest()
-        {
-            if (_webRequest != null)
-            {
-                //注意：引擎底层会自动调用Abort方法
-                _webRequest.Dispose();
-                _webRequest = null;
-            }
-        }
-
-        /// <summary>
-        /// 检测请求结果
-        /// </summary>
-        protected bool CheckRequestResult()
-        {
-            HttpCode = _webRequest.responseCode;
-
-#if UNITY_2020_3_OR_NEWER
-            if (_webRequest.result != UnityWebRequest.Result.Success)
-            {
-                Error = $"URL : {_requestURL} Error : {_webRequest.error}";
-                return false;
-            }
-            else
-            {
-                return true;
-            }
-#else
-            if (_webRequest.isNetworkError || _webRequest.isHttpError)
-            {
-                Error = $"URL : {_requestURL} Error : {_webRequest.error}";
-                return false;
-            }
-            else
-            {
-                return true;
-            }
-#endif
-        }
-    }
-}

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebRequestOperation.cs.meta

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 4e5c3c1a1655a8b41b585c6811201583
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebTextRequestOperation.cs

@@ -1,96 +0,0 @@
-using UnityEngine.Networking;
-using UnityEngine;
-
-namespace YooAsset
-{
-    internal class UnityWebTextRequestOperation : UnityWebRequestOperation
-    {
-        protected enum ESteps
-        {
-            None,
-            CreateRequest,
-            Download,
-            Done,
-        }
-
-        private UnityWebRequestAsyncOperation _requestOperation;
-        private ESteps _steps = ESteps.None;
-
-        /// <summary>
-        /// 响应的超时时间（单位：秒），在经过Timeout的秒数后尝试中止。
-        /// 注意：当Timeout设置为0时，不会应用超时。
-        /// 注意：设置的超时值可能应用于Android上的每个URL重定向，这可能会导致响应时间增加。
-        /// </summary>
-        private readonly int _timeout;
-
-        /// <summary>
-        /// 请求结果
-        /// </summary>
-        public string Result { private set; get; }
-
-
-        internal UnityWebTextRequestOperation(string url, int timeout) : base(url)
-        {
-            _timeout = timeout;
-        }
-        internal override void InternalStart()
-        {
-            _steps = ESteps.CreateRequest;
-        }
-        internal override void InternalUpdate()
-        {
-            if (_steps == ESteps.None || _steps == ESteps.Done)
-                return;
-
-            if (_steps == ESteps.CreateRequest)
-            {
-                CreateWebRequest();
-                _steps = ESteps.Download;
-            }
-
-            if (_steps == ESteps.Download)
-            {
-                DownloadProgress = _webRequest.downloadProgress;
-                DownloadedBytes = (long)_webRequest.downloadedBytes;
-                Progress = _requestOperation.progress;
-                if (_requestOperation.isDone == false)
-                    return;
-
-                if (CheckRequestResult())
-                {
-                    var fileText = _webRequest.downloadHandler.text;
-                    if (string.IsNullOrEmpty(fileText))
-                    {
-                        _steps = ESteps.Done;
-                        Status = EOperationStatus.Failed;
-                        Error = $"URL : {_requestURL} Download handler text is null or empty !";
-                    }
-                    else
-                    {
-                        _steps = ESteps.Done;
-                        Result = fileText;
-                        Status = EOperationStatus.Succeed;
-                    }
-                }
-                else
-                {
-                    _steps = ESteps.Done;
-                    Status = EOperationStatus.Failed;
-                }
-
-                // 注意：最终释放请求器
-                DisposeRequest();
-            }
-        }
-
-        private void CreateWebRequest()
-        {
-            DownloadHandlerBuffer handler = new DownloadHandlerBuffer();
-            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
-            _webRequest.timeout = _timeout;
-            _webRequest.downloadHandler = handler;
-            _webRequest.disposeDownloadHandlerOnDispose = true;
-            _requestOperation = _webRequest.SendWebRequest();
-        }
-    }
-}

Assets/YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebTextRequestOperation.cs.meta

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: a488de5dcd6f4c448a47c4b574d5c9bc
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/README.md

@@ -0,0 +1,557 @@
+# DownloadSystem 下载模块
+
+## 模块概述
+
+DownloadSystem 是 YooAsset 资源管理系统的**底层网络下载层**，负责处理所有 HTTP 网络请求。该模块提供了统一的下载接口抽象，支持文件下载、断点续传、并发请求（由上层调度）、看门狗监控等功能。
+
+### 核心职责
+
+- HTTP/HTTPS 文件下载
+- 断点续传支持
+- 看门狗超时保护
+- 多种下载类型（文件/字节/文本/AssetBundle）
+- 可插拔的网络库后端
+
+---
+
+## 边界与上层协作
+
+DownloadSystem 的职责是提供“可替换后端 + 统一请求接口 + 轮询式生命周期”的基础能力：
+
+- **本模块不负责并发队列/限流调度**：并发通常由上层同时创建多个 request 并自行控制并发数。
+- **本模块不负责重试/回退策略**：失败后的重试、切换 CDN、降级等策略通常由上层系统实现。
+- **本模块不负责持久化下载任务**：断点续传依赖本地已有文件与 `Range` 请求头，并由上层管理断点信息。
+
+---
+
+## 设计目标
+
+| 目标 | 说明 |
+|------|------|
+| **可扩展性** | 支持可插拔的网络库后端（UnityWebRequest/BestHTTP/自研） |
+| **鲁棒性** | 看门狗超时保护、自动清理失败文件、完整错误信息 |
+| **高性能** | 轮询模式无阻塞、支持并发请求（并发数由上层调度） |
+| **易用性** | 流畅的参数构建 API、清晰的状态转换 |
+
+---
+
+## 架构概念
+
+### 分层架构
+
+```
+┌─────────────────────────────────────────────────────────┐
+│                    上层调用者                             │
+│              (FileSystem / ResourceManager)             │
+└─────────────────────────┬───────────────────────────────┘
+                          │
+┌─────────────────────────▼───────────────────────────────┐
+│                  IDownloadBackend                       │
+│                    (后端接口)                            │
+│         定义网络库合约，工厂模式创建请求                     │
+└─────────────────────────┬───────────────────────────────┘
+                          │
+┌─────────────────────────▼───────────────────────────────┐
+│                  IDownloadRequest                       │
+│                    (请求接口)                            │
+│           轮询式生命周期管理，状态机驱动                     │
+└─────────────────────────┬───────────────────────────────┘
+                          │
+┌─────────────────────────▼───────────────────────────────┐
+│              UnityWebRequest / 其他网络库                 │
+│                    (底层实现)                            │
+└─────────────────────────────────────────────────────────┘
+```
+
+### 核心组件
+
+- **后端层 (IDownloadBackend)**: 定义网络库实现合约，通过工厂方法创建各类请求
+- **请求层 (IDownloadRequest)**: 统一的请求生命周期管理，支持轮询驱动
+- **参数层 (Args 结构体)**: 配置下载行为（超时、断点续传、看门狗等）
+
+---
+
+## 文件结构
+
+```
+DownloadSystem/
+├── Interface/                                # 接口定义
+│   ├── IDownloadBackend.cs                   # 后端接口（工厂模式）
+│   └── IDownloadRequest.cs                   # 请求接口层次结构
+│
+├── DefaultDownloadBackend/                   # 默认后端实现
+│   ├── UnityWebRequestBackend.cs             # UnityWebRequest 后端
+│   └── UnityWebRequestCreator.cs             # UnityWebRequest 创建委托
+│
+├── DefaultDownloadRequest/                   # 默认请求实现
+│   ├── UnityWebRequestDownloaderBase.cs      # 基础下载器（抽象类）
+│   ├── UnityWebRequestFileDownloader.cs      # 文件下载器
+│   ├── UnityWebRequestHeadDownloader.cs      # HEAD 请求器
+│   ├── UnityWebRequestBytesDownloader.cs     # 字节下载器
+│   ├── UnityWebRequestTextDownloader.cs      # 文本下载器
+│   ├── UnityWebRequestAssetBundleDownloader.cs # AssetBundle 下载器
+│   └── VirtualFileDownloader.cs              # 模拟下载器（编辑器用）
+│
+├── DownloadSystemDefine.cs                   # 枚举、结构体定义
+├── DownloadSystemHelper.cs                   # 工具函数
+└── WebRequestCounter.cs                      # 请求失败计数器
+```
+
+---
+
+## 接口说明
+
+### IDownloadBackend（后端接口）
+
+定义网络库实现的合约，通过工厂方法创建各类下载请求。
+
+```csharp
+public interface IDownloadBackend
+{
+    /// <summary>
+    /// 后端标识名称（用于日志/调试）
+    /// </summary>
+    string Name { get; }
+
+    /// <summary>
+    /// 定期驱动更新（部分第三方库需要）
+    /// </summary>
+    void Update();
+
+    // 工厂方法 - 创建各类请求
+    IDownloadHeadRequest CreateHeadRequest(DownloadDataRequestArgs args);
+    IDownloadFileRequest CreateFileRequest(DownloadFileRequestArgs args);
+    IDownloadBytesRequest CreateBytesRequest(DownloadDataRequestArgs args);
+    IDownloadTextRequest CreateTextRequest(DownloadDataRequestArgs args);
+    IDownloadAssetBundleRequest CreateAssetBundleRequest(DownloadAssetBundleRequestArgs args);
+    IDownloadFileRequest CreateSimulateRequest(DownloadSimulateRequestArgs args);
+}
+```
+
+### IDownloadRequest（基础请求接口）
+
+所有下载请求的通用接口，定义生命周期和状态管理。
+
+```csharp
+public interface IDownloadRequest : IDisposable
+{
+    // 元信息
+    string URL { get; }
+
+    // 生命周期
+    bool IsDone { get; }                      // 每次访问自动轮询
+    EDownloadRequestStatus Status { get; }
+
+    // 进度跟踪
+    float DownloadProgress { get; }           // 0f - 1f
+    long DownloadedBytes { get; }             // 本次请求新增字节数
+
+    // 诊断信息
+    long HttpCode { get; }
+    string Error { get; }
+
+    // 生命周期方法
+    void SendRequest();                       // 发起请求
+    void PollingRequest();                    // 轮询状态
+    void AbortRequest();                      // 中止请求
+}
+```
+
+### 专化请求接口
+
+| 接口 | 用途 | 特有属性 |
+|------|------|----------|
+| `IDownloadHeadRequest` | HEAD 请求，获取响应头 | `ETag`, `LastModified`, `ContentLength`, `ContentType` |
+| `IDownloadFileRequest` | 文件下载到本地 | `SavePath` |
+| `IDownloadBytesRequest` | 下载到内存（字节数组） | `byte[] Result` |
+| `IDownloadTextRequest` | 下载文本内容 | `string Result` |
+| `IDownloadAssetBundleRequest` | 下载并加载 AssetBundle | `AssetBundle Result` |
+
+---
+
+## 结构体定义
+
+### 请求状态枚举
+
+```csharp
+public enum EDownloadRequestStatus
+{
+    None,       // 未开始
+    Running,    // 进行中
+    Succeed,    // 已成功
+    Failed,     // 已失败
+    Aborted     // 已中止（用户中止或看门狗超时）
+}
+```
+
+### 请求参数结构体
+
+#### DownloadFileRequestArgs（文件下载参数）
+
+```csharp
+public struct DownloadFileRequestArgs
+{
+    public string URL;                    // 请求地址
+    public int Timeout;                   // 响应超时（秒），0=无限制
+    public int WatchdogTime;              // 看门狗超时（秒）
+
+    public string SavePath;               // 文件保存路径
+    public bool AppendToFile;             // 追加写入（断点续传）
+    public bool RemoveFileOnAbort;        // 中止时删除文件
+    public long ResumeFromBytes;          // 断点续传起始位置
+
+    public Dictionary<string, string> Headers;  // 自定义请求头
+}
+```
+
+#### DownloadDataRequestArgs（数据下载参数）
+
+```csharp
+public struct DownloadDataRequestArgs
+{
+    public string URL;                    // 请求地址
+    public int Timeout;                   // 响应超时（秒）
+    public int WatchdogTime;              // 看门狗超时（秒）
+    public Dictionary<string, string> Headers;  // 自定义请求头
+}
+```
+
+#### DownloadAssetBundleRequestArgs（AssetBundle 下载参数）
+
+```csharp
+public struct DownloadAssetBundleRequestArgs
+{
+    public string URL;                    // 请求地址
+    public int Timeout;                   // 响应超时
+    public int WatchdogTime;              // 看门狗超时
+
+    public bool DisableUnityWebCache;     // 禁用 Unity 缓存（推荐 true）
+    public string FileHash;               // 文件哈希（缓存启用时需要）
+    public uint UnityCRC;                 // Unity CRC 校验值
+
+    public Dictionary<string, string> Headers;
+}
+```
+
+#### DownloadSimulateRequestArgs（模拟下载参数）
+
+```csharp
+public struct DownloadSimulateRequestArgs
+{
+    public string URL;            // 标识符
+    public long FileSize;         // 模拟文件大小
+    public long DownloadSpeed;    // 模拟速度（字节/秒），默认 1MB/s
+}
+```
+
+---
+
+## 核心类说明
+
+### UnityWebRequestBackend
+
+默认的后端实现，基于 Unity 的 UnityWebRequest API。
+
+**特性：**
+- 支持自定义 UnityWebRequest 创建方式（证书验证、代理等）
+- 无需手动调用 Update()，UnityWebRequest 自动驱动
+
+```csharp
+// 自定义 UnityWebRequest 创建（建议通过 backend 构造函数传入）
+UnityWebRequestCreator creator = (url, method) =>
+{
+    var request = new UnityWebRequest(url, method);
+    // 自定义配置...
+    return request;
+};
+
+IDownloadBackend backend = new UnityWebRequestBackend(creator);
+```
+
+### UnityWebRequestDownloaderBase
+
+抽象基类，封装所有下载器的通用逻辑。
+
+**职责：**
+- 管理请求生命周期和状态转换
+- 实现看门狗监控机制
+- 追踪下载进度和字节数
+- 处理超时和错误
+
+**生命周期：**
+
+```
+None ──► SendRequest() ──► Running ──► PollingRequest() ──┬──► Succeed
+                                                          ├──► Failed
+                                                          └──► Aborted
+```
+
+### 具体下载器
+
+| 下载器 | 实现接口 | 使用场景 |
+|--------|----------|----------|
+| `UnityWebRequestFileDownloader` | `IDownloadFileRequest` | 大文件下载到本地 |
+| `UnityWebRequestHeadDownloader` | `IDownloadHeadRequest` | 检查资源信息 |
+| `UnityWebRequestBytesDownloader` | `IDownloadBytesRequest` | 小文件内存加载 |
+| `UnityWebRequestTextDownloader` | `IDownloadTextRequest` | 文本文件下载 |
+| `UnityWebRequestAssetBundleDownloader` | `IDownloadAssetBundleRequest` | AB 包下载加载 |
+| `VirtualFileDownloader` | `IDownloadFileRequest` | 编辑器模拟下载 |
+
+---
+
+## 使用示例
+
+### 基础文件下载
+
+```csharp
+// 1. 创建后端和请求
+IDownloadBackend backend = new UnityWebRequestBackend();
+var args = new DownloadFileRequestArgs(
+    url: "https://example.com/file.zip",
+    savePath: "/path/to/save/file.zip",
+    timeout: 30,
+    watchdogTime: 0);
+IDownloadFileRequest request = backend.CreateFileRequest(args);
+
+// 2. 发起并轮询
+request.SendRequest();
+while (!request.IsDone)
+{
+    await Task.Yield();
+    // 可选：显示进度
+    float progress = request.DownloadProgress;
+}
+
+// 3. 检查结果
+if (request.Status == EDownloadRequestStatus.Succeed)
+{
+    Debug.Log("下载成功");
+}
+else
+{
+    Debug.LogError($"下载失败: {request.Error}");
+}
+
+// 4. 清理资源
+request.Dispose();
+```
+
+### 断点续传
+
+```csharp
+// 获取已下载的文件大小
+long existingFileSize = new FileInfo(savePath).Length;
+
+var args = new DownloadFileRequestArgs(
+    url: url,
+    savePath: savePath,
+    timeout: 30,
+    watchdogTime: 0,
+    appendToFile: true,                 // 追加写入
+    removeFileOnAbort: false,           // 中止时保留文件
+    resumeFromBytes: existingFileSize); // 断点位置
+
+IDownloadFileRequest request = backend.CreateFileRequest(args);
+request.SendRequest();
+// ... 轮询等待完成
+```
+
+### 看门狗保护
+
+```csharp
+var args = new DownloadFileRequestArgs(
+    url: url,
+    savePath: path,
+    timeout: 30,
+    watchdogTime: 30); // 30秒无数据自动中止
+
+IDownloadFileRequest request = backend.CreateFileRequest(args);
+request.SendRequest();
+
+while (!request.IsDone)
+{
+    await Task.Yield();
+}
+
+// 检查是否因看门狗超时而中止
+if (request.Status == EDownloadRequestStatus.Aborted)
+{
+    Debug.LogWarning("下载超时，已自动中止");
+}
+```
+
+### HEAD 请求获取文件信息
+
+```csharp
+var args = new DownloadDataRequestArgs(
+    url: "https://example.com/file.zip",
+    timeout: 30,
+    watchdogTime: 0);
+
+IDownloadHeadRequest request = backend.CreateHeadRequest(args);
+request.SendRequest();
+
+while (!request.IsDone)
+{
+    await Task.Yield();
+}
+
+if (request.Status == EDownloadRequestStatus.Succeed)
+{
+    long fileSize = request.ContentLength;
+    string etag = request.ETag;
+    string lastModified = request.LastModified;
+
+    Debug.Log($"文件大小: {fileSize}, ETag: {etag}");
+}
+```
+
+### 下载字节数据
+
+```csharp
+var args = new DownloadDataRequestArgs(
+    url: "https://example.com/data.json",
+    timeout: 30,
+    watchdogTime: 0);
+
+IDownloadBytesRequest request = backend.CreateBytesRequest(args);
+request.SendRequest();
+
+while (!request.IsDone)
+{
+    await Task.Yield();
+}
+
+if (request.Status == EDownloadRequestStatus.Succeed)
+{
+    byte[] data = request.Result;
+    // 处理数据...
+}
+```
+
+---
+
+## 设计模式
+
+### 工厂模式
+
+`IDownloadBackend` 作为工厂接口，创建各类下载请求对象：
+
+```
+IDownloadBackend
+    ├── CreateHeadRequest()    ──► IDownloadHeadRequest
+    ├── CreateFileRequest()    ──► IDownloadFileRequest
+    ├── CreateBytesRequest()   ──► IDownloadBytesRequest
+    ├── CreateTextRequest()    ──► IDownloadTextRequest
+    ├── CreateAssetBundleRequest() ──► IDownloadAssetBundleRequest
+    └── CreateSimulateRequest() ──► IDownloadFileRequest
+```
+
+### 策略模式
+
+通过实现 `IDownloadBackend` 接口，可以替换底层网络库：
+
+```
+IDownloadBackend (接口)
+    ├── UnityWebRequestBackend  (默认实现)
+    ├── BestHTTPBackend         (可扩展)
+    └── CustomBackend           (自定义)
+```
+
+### 状态机模式
+
+请求生命周期通过状态机管理：
+
+```
+┌──────┐    SendRequest()    ┌─────────┐
+│ None │ ──────────────────► │ Running │
+└──────┘                     └────┬────┘
+                                  │ PollingRequest()
+                    ┌─────────────┼─────────────┐
+                    ▼             ▼             ▼
+              ┌─────────┐  ┌──────────┐  ┌─────────┐
+              │ Succeed │  │  Failed  │  │ Aborted │
+              └─────────┘  └──────────┘  └─────────┘
+```
+
+### 看门狗模式
+
+监控数据接收，防止网络卡顿导致请求无限等待：
+
+```
+每帧轮询 PollingRequest()
+    │
+    ├── 收到新数据 ──► 重置计时器
+    │
+    └── 未收到数据 ──► 计时器累加
+                           │
+                           └── 超过 WatchdogTime ──► AbortRequest()
+```
+
+---
+
+## 类继承关系
+
+```
+IDownloadRequest (基础接口)
+    │
+    ├── IDownloadHeadRequest        (HEAD 请求)
+    ├── IDownloadFileRequest        (文件下载)
+    ├── IDownloadBytesRequest       (字节下载)
+    ├── IDownloadTextRequest        (文本下载)
+    └── IDownloadAssetBundleRequest (AssetBundle 下载)
+
+UnityWebRequestDownloaderBase (抽象基类)
+    │
+    ├── UnityWebRequestFileDownloader      ──► IDownloadFileRequest
+    ├── UnityWebRequestHeadDownloader      ──► IDownloadHeadRequest
+    ├── UnityWebRequestBytesDownloader     ──► IDownloadBytesRequest
+    ├── UnityWebRequestTextDownloader      ──► IDownloadTextRequest
+    └── UnityWebRequestAssetBundleDownloader ──► IDownloadAssetBundleRequest
+
+VirtualFileDownloader (独立实现) ──► IDownloadFileRequest
+```
+
+---
+
+## 工具类
+
+### DownloadSystemHelper
+
+提供跨平台的工具函数：
+
+| 方法 | 说明 |
+|------|------|
+| `ConvertToWWWPath()` | 转换本地路径为 WWW 协议 URL |
+| `IsRequestLocalFile()` | 判断是否本地文件请求 |
+
+### WebRequestCounter
+
+请求失败计数器，用于诊断统计：
+
+- 线程安全：内部使用 `Dictionary` 且未加锁，约定只在主线程调用；如需多线程统计请在外层加锁或改造实现
+- Key 规则：`$"{packageName}_{eventName}"`
+- 统计口径：**仅统计网络请求失败**（`IDownloadRequest.Status != Succeed` 时记录），不统计内容为空、校验失败、解析失败等业务层失败
+
+```csharp
+// 记录失败
+WebRequestCounter.RecordRequestFailed(packageName, eventName);
+
+// 查询失败次数
+int count = WebRequestCounter.GetRequestFailedCount(packageName, eventName);
+```
+
+---
+
+## 注意事项
+
+1. **资源释放**：使用完毕后务必调用 `Dispose()` 释放资源
+   - `AbortRequest()` 仅用于中止请求与切换状态，不等同于释放资源；无论成功/失败/中止都需要 `Dispose()`
+   - 推荐使用 `try/finally` 确保释放（尤其是上层可能提前中止的场景）
+2. **断点续传**：需要服务器支持 `Range` 请求头和 `206 Partial Content` 响应
+   - 若服务端不支持 Range 仍返回 200，全量内容可能会被追加写入，导致文件损坏
+3. **看门狗超时**：设置为 0 表示禁用，建议根据网络环境设置合理值
+4. **内存下载**：`IDownloadBytesRequest` 会将整个响应体加载到内存，不适合大文件
+5. **驱动更新**：部分第三方网络库实现的 backend 可能需要每帧调用 `IDownloadBackend.Update()` 进行驱动
+6. **中止语义**：`Aborted` 可能来自用户主动 `AbortRequest()` 或看门狗超时；中止场景下 `HttpCode/Error` 可能为默认值（例如 0/空）
+7. **线程安全**：所有下载请求的创建和轮询应在主线程进行

Assets/YooAsset/Runtime/DownloadSystem/README.md.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 2c65d3ba8da65004b8d36dbeecc6c6be
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/DownloadSystem/WebRequestCounter.cs

@@ -1,9 +1,14 @@
-using System;
-using System.Collections;
 using System.Collections.Generic;
 
 namespace YooAsset
 {
+    /// <summary>
+    /// 网络请求失败计数器（诊断用）
+    /// </summary>
+    /// <remarks>
+    /// 线程安全：内部使用 Dictionary 且未加锁，约定只在 Unity 主线程调用。
+    /// 如需在多线程/回调线程调用，请在外层加锁或改为并发容器实现。
+    /// </remarks>
     internal class WebRequestCounter
     {
 #if UNITY_EDITOR
@@ -15,12 +20,12 @@ namespace YooAsset
 #endif
 
         /// <summary>
-        /// 记录网络请求失败事件的次数
+        /// 失败计数记录表（key = $"{packageName}_{eventName}"）
         /// </summary>
         private static readonly Dictionary<string, int> _requestFailedRecorder = new Dictionary<string, int>(1000);
 
         /// <summary>
-        /// 记录请求失败事件
+        /// 记录一次失败
         /// </summary>
         public static void RecordRequestFailed(string packageName, string eventName)
         {
@@ -31,14 +36,14 @@ namespace YooAsset
         }
 
         /// <summary>
-        /// 获取请求失败的次数
+        /// 获取失败次数
         /// </summary>
         public static int GetRequestFailedCount(string packageName, string eventName)
         {
             string key = $"{packageName}_{eventName}";
-            if (_requestFailedRecorder.ContainsKey(key) == false)
-                _requestFailedRecorder.Add(key, 0);
-            return _requestFailedRecorder[key];
+            if (_requestFailedRecorder.TryGetValue(key, out int count))
+                return count;
+            return 0;
         }
     }
-}
+}

Assets/YooAsset/Runtime/FileSystem/BundleResult/AssetBundleResult/Operation/AssetBundleLoadAllAssetsOperation.cs

@@ -39,7 +39,7 @@ namespace YooAsset
                 if (_assetBundle == null)
                 {
                     _steps = ESteps.Done;
-                    Error = $"The bundle {_packageBundle.BundleName} has been destroyed due to unity engine bugs !";
+                    Error = $"The bundle {_packageBundle.BundleName} has been destroyed due to unity engine bugs.";
                     Status = EOperationStatus.Failed;
                     return;
                 }
@@ -108,14 +108,7 @@ namespace YooAsset
         }
         internal override void InternalWaitForAsyncComplete()
         {
-            while (true)
-            {
-                if (ExecuteWhileDone())
-                {
-                    _steps = ESteps.Done;
-                    break;
-                }
-            }
+            RunBatchExecution();
         }
     }
 }

Assets/YooAsset/Runtime/FileSystem/BundleResult/AssetBundleResult/Operation/AssetBundleLoadAssetOperation.cs

@@ -39,7 +39,7 @@ namespace YooAsset
                 if (_assetBundle == null)
                 {
                     _steps = ESteps.Done;
-                    Error = $"The bundle {_packageBundle.BundleName} has been destroyed due to unity engine bugs !";
+                    Error = $"The bundle {_packageBundle.BundleName} has been destroyed due to unity engine bugs.";
                     Status = EOperationStatus.Failed;
                     return;
                 }
@@ -108,14 +108,7 @@ namespace YooAsset
         }
         internal override void InternalWaitForAsyncComplete()
         {
-            while (true)
-            {
-                if (ExecuteWhileDone())
-                {
-                    _steps = ESteps.Done;
-                    break;
-                }
-            }
+            RunBatchExecution();
         }
     }
 }

Assets/YooAsset/Runtime/FileSystem/BundleResult/AssetBundleResult/Operation/AssetBundleLoadSceneOperation.cs

@@ -72,7 +72,7 @@ namespace YooAsset
                     if (IsWaitForAsyncComplete)
                     {
                         //注意：场景加载无法强制异步转同步
-                        YooLogger.Error("The scene is loading asyn !");
+                        YooLogger.Error("The scene is loading asyn.");
                     }
                     else
                     {
@@ -107,7 +107,7 @@ namespace YooAsset
         internal override void InternalWaitForAsyncComplete()
         {
             //注意：场景加载不支持异步转同步，为了支持同步加载方法需要实现该方法！
-            InternalUpdate();
+            RunOnceExecution();
         }
         public override void UnSuspendLoad()
         {

Assets/YooAsset/Runtime/FileSystem/BundleResult/AssetBundleResult/Operation/AssetBundleLoadSubAssetsOperation.cs

@@ -39,7 +39,7 @@ namespace YooAsset
                 if (_assetBundle == null)
                 {
                     _steps = ESteps.Done;
-                    Error = $"The bundle {_packageBundle.BundleName} has been destroyed due to unity engine bugs !";
+                    Error = $"The bundle {_packageBundle.BundleName} has been destroyed due to unity engine bugs.";
                     Status = EOperationStatus.Failed;
                     return;
                 }
@@ -108,14 +108,7 @@ namespace YooAsset
         }
         internal override void InternalWaitForAsyncComplete()
         {
-            while (true)
-            {
-                if (ExecuteWhileDone())
-                {
-                    _steps = ESteps.Done;
-                    break;
-                }
-            }
+            RunBatchExecution();
         }
     }
 }

Assets/YooAsset/Runtime/FileSystem/BundleResult/RawBundleResult/Operation/RawBundleLoadAllAssetsOperation.cs

@@ -5,7 +5,7 @@ namespace YooAsset
     {
         internal override void InternalStart()
         {
-            Error = $"{nameof(RawBundleLoadAllAssetsOperation)} not support load all assets !";
+            Error = $"{nameof(RawBundleLoadAllAssetsOperation)} not support load all assets.";
             Status = EOperationStatus.Failed;
         }
         internal override void InternalUpdate()

Assets/YooAsset/Runtime/FileSystem/BundleResult/RawBundleResult/Operation/RawBundleLoadAssetOperation.cs

@@ -5,7 +5,7 @@ namespace YooAsset
     {
         internal override void InternalStart()
         {
-            Error = $"{nameof(RawBundleLoadAssetOperation)} not support load asset !";
+            Error = $"{nameof(RawBundleLoadAssetOperation)} not support load asset.";
             Status = EOperationStatus.Failed;
         }
         internal override void InternalUpdate()

Assets/YooAsset/Runtime/FileSystem/BundleResult/RawBundleResult/Operation/RawBundleLoadSceneOperation.cs

@@ -5,7 +5,7 @@ namespace YooAsset
     {
         internal override void InternalStart()
         {
-            Error = $"{nameof(RawBundleLoadSceneOperation)} not support load scene !";
+            Error = $"{nameof(RawBundleLoadSceneOperation)} not support load scene.";
             Status = EOperationStatus.Failed;
         }
         internal override void InternalUpdate()

Assets/YooAsset/Runtime/FileSystem/BundleResult/RawBundleResult/Operation/RawBundleLoadSubAssetsOperation.cs

@@ -5,7 +5,7 @@ namespace YooAsset
     {
         internal override void InternalStart()
         {
-            Error = $"{nameof(RawBundleLoadSubAssetsOperation)} not support load sub assets !";
+            Error = $"{nameof(RawBundleLoadSubAssetsOperation)} not support load sub assets.";
             Status = EOperationStatus.Failed;
         }
         internal override void InternalUpdate()

Assets/YooAsset/Runtime/FileSystem/BundleResult/VirtualBundleResult/Operation/VirtualBundleLoadAllAssetsOperation.cs

@@ -28,7 +28,7 @@ namespace YooAsset
             _steps = ESteps.CheckBundle;
 #else
             _steps = ESteps.Done;
-            Error = $"{nameof(VirtualBundleLoadAllAssetsOperation)} only support unity editor platform !";
+            Error = $"{nameof(VirtualBundleLoadAllAssetsOperation)} only support unity editor platform.";
             Status = EOperationStatus.Failed;            
 #endif
         }
@@ -109,14 +109,7 @@ namespace YooAsset
         }
         internal override void InternalWaitForAsyncComplete()
         {
-            while (true)
-            {
-                if (ExecuteWhileDone())
-                {
-                    _steps = ESteps.Done;
-                    break;
-                }
-            }
+            RunBatchExecution();
         }
     }
 }

Assets/YooAsset/Runtime/FileSystem/BundleResult/VirtualBundleResult/Operation/VirtualBundleLoadAssetOperation.cs

@@ -27,7 +27,7 @@ namespace YooAsset
             _steps = ESteps.CheckBundle;
 #else
             _steps = ESteps.Done;
-            Error = $"{nameof(VirtualBundleLoadAssetOperation)} only support unity editor platform !";
+            Error = $"{nameof(VirtualBundleLoadAssetOperation)} only support unity editor platform.";
             Status = EOperationStatus.Failed;            
 #endif
         }
@@ -88,14 +88,7 @@ namespace YooAsset
         }
         internal override void InternalWaitForAsyncComplete()
         {
-            while (true)
-            {
-                if (ExecuteWhileDone())
-                {
-                    _steps = ESteps.Done;
-                    break;
-                }
-            }
+            RunBatchExecution();
         }
     }
 }

Assets/YooAsset/Runtime/FileSystem/BundleResult/VirtualBundleResult/Operation/VirtualBundleLoadSceneOperation.cs

@@ -31,7 +31,7 @@ namespace YooAsset
             _steps = ESteps.LoadScene;
 #else
             _steps = ESteps.Done;
-            Error = $"{nameof(VirtualBundleLoadSceneOperation)} only support unity editor platform !";
+            Error = $"{nameof(VirtualBundleLoadSceneOperation)} only support unity editor platform.";
             Status = EOperationStatus.Failed;            
 #endif
         }
@@ -77,7 +77,7 @@ namespace YooAsset
                     if (IsWaitForAsyncComplete)
                     {
                         // 注意：场景加载无法强制异步转同步
-                        YooLogger.Error("The scene is loading asyn !");
+                        YooLogger.Error("The scene is loading asyn.");
                     }
                     else
                     {
@@ -113,7 +113,7 @@ namespace YooAsset
         internal override void InternalWaitForAsyncComplete()
         {
             //注意：场景加载不支持异步转同步，为了支持同步加载方法需要实现该方法！
-            InternalUpdate();
+            RunOnceExecution();
         }
         public override void UnSuspendLoad()
         {

Assets/YooAsset/Runtime/FileSystem/BundleResult/VirtualBundleResult/Operation/VirtualBundleLoadSubAssetsOperation.cs

@@ -28,7 +28,7 @@ namespace YooAsset
             _steps = ESteps.CheckBundle;
 #else
             _steps = ESteps.Done;
-            Error = $"{nameof(VirtualBundleLoadSubAssetsOperation)} only support unity editor platform !";
+            Error = $"{nameof(VirtualBundleLoadSubAssetsOperation)} only support unity editor platform.";
             Status = EOperationStatus.Failed;            
 #endif
         }
@@ -100,14 +100,7 @@ namespace YooAsset
         }
         internal override void InternalWaitForAsyncComplete()
         {
-            while (true)
-            {
-                if (ExecuteWhileDone())
-                {
-                    _steps = ESteps.Done;
-                    break;
-                }
-            }
+            RunBatchExecution();
         }
     }
 }