fix #429

ClearCacheBundleFilesAsync重命名为ClearCacheFilesAsync
2025-01-03 15:08:57 +08:00
parent 1d0c0ee7cb
commit 278b6e3cc8
56 changed files with 392 additions and 310 deletions
@@ -100,13 +100,13 @@ namespace YooAsset
            DefaultDownloadFileOperation newDownloader;
            if (bundle.FileSize >= _fileSystem.ResumeDownloadMinimumSize)
            {
-                newDownloader = new DownloadResumeFileOperation(_fileSystem, _fileSystem, bundle, param, _fileSystem.ResumeDownloadResponseCodes);
+                newDownloader = new DownloadResumeFileOperation(_fileSystem, bundle, param);
                newDownloader.Reference();
                _downloaders.Add(bundle.BundleGUID, newDownloader);
            }
            else
            {
-                newDownloader = new DownloadNormalFileOperation(_fileSystem, _fileSystem, bundle, param);
+                newDownloader = new DownloadNormalFileOperation(_fileSystem, bundle, param);
                newDownloader.Reference();
                _downloaders.Add(bundle.BundleGUID, newDownloader);
            }
@@ -2,7 +2,6 @@
 using System.IO;
 using System.Collections.Generic;
 using System.Linq;
-using UnityEngine;

 namespace YooAsset
 {
@@ -10,18 +9,18 @@ namespace YooAsset
    /// 缓存文件系统
    /// 说明：正在进行的下载器会在ResourcePackage销毁的时候执行Abort操作！
    /// </summary>
-    internal class DefaultCacheFileSystem : IFileSystem, ICacheSystem
+    internal class DefaultCacheFileSystem : IFileSystem
    {
-        protected readonly Dictionary<string, CacheWrapper> _wrappers = new Dictionary<string, CacheWrapper>(10000);
-        protected readonly Dictionary<string, string> _dataFilePaths = new Dictionary<string, string>(10000);
-        protected readonly Dictionary<string, string> _infoFilePaths = new Dictionary<string, string>(10000);
+        protected readonly Dictionary<string, RecordFileElement> _wrappers = new Dictionary<string, RecordFileElement>(10000);
+        protected readonly Dictionary<string, string> _bundleDataFilePaths = new Dictionary<string, string>(10000);
+        protected readonly Dictionary<string, string> _bundleInfoFilePaths = new Dictionary<string, string>(10000);
        protected readonly Dictionary<string, string> _tempFilePaths = new Dictionary<string, string>(10000);
        protected DefaultCacheDownloadCenter _downloadCenter;

        protected string _packageRoot;
-        protected string _cacheFileRoot;
-        protected string _tempFileRoot;
-        protected string _manifestFileRoot;
+        protected string _tempFilesRoot;
+        protected string _cacheBundleFilesRoot;
+        protected string _cacheManifestFilesRoot;

        /// <summary>
        /// 包裹名称
@@ -114,30 +113,42 @@ namespace YooAsset
            OperationSystem.StartOperation(PackageName, operation);
            return operation;
        }
-        public virtual FSClearCacheBundleFilesOperation ClearCacheBundleFilesAsync(PackageManifest manifest, string clearMode, object clearParam)
+        public virtual FSClearCacheFilesOperation ClearCacheFilesAsync(PackageManifest manifest, string clearMode, object clearParam)
        {
            if (clearMode == EFileClearMode.ClearAllBundleFiles.ToString())
            {
-                var operation = new ClearAllCacheFilesOperation(this);
+                var operation = new ClearAllCacheBundleFilesOperation(this);
                OperationSystem.StartOperation(PackageName, operation);
                return operation;
            }
            else if (clearMode == EFileClearMode.ClearUnusedBundleFiles.ToString())
            {
-                var operation = new ClearUnusedCacheFilesOperation(this, manifest);
+                var operation = new ClearUnusedCacheBundleFilesOperation(this, manifest);
                OperationSystem.StartOperation(PackageName, operation);
                return operation;
            }
            else if (clearMode == EFileClearMode.ClearBundleFilesByTags.ToString())
            {
-                var operation = new ClearCacheFilesByTagsOperaiton(this, manifest, clearParam);
+                var operation = new ClearCacheBundleFilesByTagsOperaiton(this, manifest, clearParam);
+                OperationSystem.StartOperation(PackageName, operation);
+                return operation;
+            }
+            else if (clearMode == EFileClearMode.ClearAllManifestFiles.ToString())
+            {
+                var operation = new ClearAllCacheManifestFilesOperation(this);
+                OperationSystem.StartOperation(PackageName, operation);
+                return operation;
+            }
+            else if (clearMode == EFileClearMode.ClearUnusedManifestFiles.ToString())
+            {
+                var operation = new ClearUnusedCacheManifestFilesOperation(this, manifest);
                OperationSystem.StartOperation(PackageName, operation);
                return operation;
            }
            else
            {
                string error = $"Invalid clear mode : {clearMode}";
-                var operation = new FSClearCacheBundleFilesCompleteOperation(error);
+                var operation = new FSClearCacheFilesCompleteOperation(error);
                OperationSystem.StartOperation(PackageName, operation);
                return operation;
            }
@@ -217,9 +228,9 @@ namespace YooAsset
            else
                _packageRoot = packageRoot;

-            _cacheFileRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.SaveFilesFolderName);
-            _tempFileRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.TempFilesFolderName);
-            _manifestFileRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.ManifestFilesFolderName);
+            _cacheBundleFilesRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.BundleFilesFolderName);
+            _tempFilesRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.TempFilesFolderName);
+            _cacheManifestFilesRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.ManifestFilesFolderName);
            _downloadCenter = new DefaultCacheDownloadCenter(this);
        }
        public virtual void OnUpdate()
@@ -257,7 +268,7 @@ namespace YooAsset

        public virtual string GetBundleFilePath(PackageBundle bundle)
        {
-            return GetCacheFileLoadPath(bundle);
+            return GetCacheBundleFileLoadPath(bundle);
        }
        public virtual byte[] ReadBundleFileData(PackageBundle bundle)
        {
@@ -272,7 +283,7 @@ namespace YooAsset
                    return null;
                }

-                string filePath = GetCacheFileLoadPath(bundle);
+                string filePath = GetCacheBundleFileLoadPath(bundle);
                var fileInfo = new DecryptFileInfo()
                {
                    BundleName = bundle.BundleName,
@@ -283,7 +294,7 @@ namespace YooAsset
            }
            else
            {
-                string filePath = GetCacheFileLoadPath(bundle);
+                string filePath = GetCacheBundleFileLoadPath(bundle);
                return FileUtility.ReadAllBytes(filePath);
            }
        }
@@ -300,7 +311,7 @@ namespace YooAsset
                    return null;
                }

-                string filePath = GetCacheFileLoadPath(bundle);
+                string filePath = GetCacheBundleFileLoadPath(bundle);
                var fileInfo = new DecryptFileInfo()
                {
                    BundleName = bundle.BundleName,
@@ -311,85 +322,82 @@ namespace YooAsset
            }
            else
            {
-                string filePath = GetCacheFileLoadPath(bundle);
+                string filePath = GetCacheBundleFileLoadPath(bundle);
                return FileUtility.ReadAllText(filePath);
            }
        }

-        #region 缓存系统
-        public string GetCacheFileRoot()
-        {
-            return _cacheFileRoot;
-        }
-        public string GetTempFilePath(PackageBundle bundle)
-        {
-            if (_tempFilePaths.TryGetValue(bundle.BundleGUID, out string filePath) == false)
-            {
-                filePath = PathUtility.Combine(_tempFileRoot, bundle.BundleGUID);
-                _tempFilePaths.Add(bundle.BundleGUID, filePath);
-            }
-            return filePath;
-        }
-        public string GetDataFilePath(PackageBundle bundle)
-        {
-            if (_dataFilePaths.TryGetValue(bundle.BundleGUID, out string filePath) == false)
-            {
-                string folderName = bundle.FileHash.Substring(0, 2);
-                filePath = PathUtility.Combine(_cacheFileRoot, folderName, bundle.BundleGUID, DefaultCacheFileSystemDefine.SaveBundleDataFileName);
-                if (AppendFileExtension)
-                    filePath += bundle.FileExtension;
-                _dataFilePaths.Add(bundle.BundleGUID, filePath);
-            }
-            return filePath;
-        }
-        public string GetInfoFilePath(PackageBundle bundle)
-        {
-            if (_infoFilePaths.TryGetValue(bundle.BundleGUID, out string filePath) == false)
-            {
-                string folderName = bundle.FileHash.Substring(0, 2);
-                filePath = PathUtility.Combine(_cacheFileRoot, folderName, bundle.BundleGUID, DefaultCacheFileSystemDefine.SaveBundleInfoFileName);
-                _infoFilePaths.Add(bundle.BundleGUID, filePath);
-            }
-            return filePath;
-        }
+        #region 缓存相关
        public List<string> GetAllCachedBundleGUIDs()
        {
            return _wrappers.Keys.ToList();
        }

-        public bool IsRecordFile(string bundleGUID)
+        public string GetTempFilePath(PackageBundle bundle)
+        {
+            if (_tempFilePaths.TryGetValue(bundle.BundleGUID, out string filePath) == false)
+            {
+                filePath = PathUtility.Combine(_tempFilesRoot, bundle.BundleGUID);
+                _tempFilePaths.Add(bundle.BundleGUID, filePath);
+            }
+            return filePath;
+        }
+        public string GetBundleDataFilePath(PackageBundle bundle)
+        {
+            if (_bundleDataFilePaths.TryGetValue(bundle.BundleGUID, out string filePath) == false)
+            {
+                string folderName = bundle.FileHash.Substring(0, 2);
+                filePath = PathUtility.Combine(_cacheBundleFilesRoot, folderName, bundle.BundleGUID, DefaultCacheFileSystemDefine.BundleDataFileName);
+                if (AppendFileExtension)
+                    filePath += bundle.FileExtension;
+                _bundleDataFilePaths.Add(bundle.BundleGUID, filePath);
+            }
+            return filePath;
+        }
+        public string GetBundleInfoFilePath(PackageBundle bundle)
+        {
+            if (_bundleInfoFilePaths.TryGetValue(bundle.BundleGUID, out string filePath) == false)
+            {
+                string folderName = bundle.FileHash.Substring(0, 2);
+                filePath = PathUtility.Combine(_cacheBundleFilesRoot, folderName, bundle.BundleGUID, DefaultCacheFileSystemDefine.BundleInfoFileName);
+                _bundleInfoFilePaths.Add(bundle.BundleGUID, filePath);
+            }
+            return filePath;
+        }
+
+        public bool IsRecordBundleFile(string bundleGUID)
        {
            return _wrappers.ContainsKey(bundleGUID);
        }
-        public bool RecordFile(string bundleGUID, CacheWrapper wrapper)
+        public bool RecordBundleFile(string bundleGUID, RecordFileElement element)
        {
            if (_wrappers.ContainsKey(bundleGUID))
            {
-                YooLogger.Error($"{nameof(DefaultCacheFileSystem)} has element : {bundleGUID}");
+                YooLogger.Error($"{nameof(DefaultCacheFileSystem)} has record file element : {bundleGUID}");
                return false;
            }

-            _wrappers.Add(bundleGUID, wrapper);
+            _wrappers.Add(bundleGUID, element);
            return true;
        }

        public EFileVerifyResult VerifyCacheFile(PackageBundle bundle)
        {
-            if (_wrappers.TryGetValue(bundle.BundleGUID, out CacheWrapper wrapper) == false)
+            if (_wrappers.TryGetValue(bundle.BundleGUID, out RecordFileElement wrapper) == false)
                return EFileVerifyResult.CacheNotFound;

            EFileVerifyResult result = FileVerifyHelper.FileVerify(wrapper.DataFilePath, wrapper.DataFileSize, wrapper.DataFileCRC, EFileVerifyLevel.High);
            return result;
        }
-        public bool WriteCacheFile(PackageBundle bundle, string copyPath)
+        public bool WriteCacheBundleFile(PackageBundle bundle, string copyPath)
        {
            if (_wrappers.ContainsKey(bundle.BundleGUID))
            {
                throw new Exception("Should never get here !");
            }

-            string infoFilePath = GetInfoFilePath(bundle);
-            string dataFilePath = GetDataFilePath(bundle);
+            string infoFilePath = GetBundleInfoFilePath(bundle);
+            string dataFilePath = GetBundleDataFilePath(bundle);

            try
            {
@@ -405,7 +413,7 @@ namespace YooAsset
                fileInfo.CopyTo(dataFilePath);

                // 写入文件信息
-                WriteInfoFile(infoFilePath, bundle.FileCRC, bundle.FileSize);
+                WriteBundleInfoFile(infoFilePath, bundle.FileCRC, bundle.FileSize);
            }
            catch (Exception e)
            {
@@ -413,12 +421,12 @@ namespace YooAsset
                return false;
            }

-            var wrapper = new CacheWrapper(infoFilePath, dataFilePath, bundle.FileCRC, bundle.FileSize);
-            return RecordFile(bundle.BundleGUID, wrapper);
+            var recordFileElement = new RecordFileElement(infoFilePath, dataFilePath, bundle.FileCRC, bundle.FileSize);
+            return RecordBundleFile(bundle.BundleGUID, recordFileElement);
        }
-        public bool DeleteCacheFile(string bundleGUID)
+        public bool DeleteCacheBundleFile(string bundleGUID)
        {
-            if (_wrappers.TryGetValue(bundleGUID, out CacheWrapper wrapper))
+            if (_wrappers.TryGetValue(bundleGUID, out RecordFileElement wrapper))
            {
                try
                {
@@ -442,7 +450,7 @@ namespace YooAsset
        }

        private readonly BufferWriter _sharedBuffer = new BufferWriter(1024);
-        public void WriteInfoFile(string filePath, string dataFileCRC, long dataFileSize)
+        public void WriteBundleInfoFile(string filePath, string dataFileCRC, long dataFileSize)
        {
            using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.Read))
            {
@@ -453,7 +461,7 @@ namespace YooAsset
                fs.Flush();
            }
        }
-        public void ReadInfoFile(string filePath, out string dataFileCRC, out long dataFileSize)
+        public void ReadBundleInfoFile(string filePath, out string dataFileCRC, out long dataFileSize)
        {
            byte[] binaryData = FileUtility.ReadAllBytes(filePath);
            BufferReader buffer = new BufferReader(binaryData);
@@ -477,23 +485,31 @@ namespace YooAsset

            return PathUtility.Combine(rootDirectory, packageName);
        }
-        public string GetCacheFileLoadPath(PackageBundle bundle)
+        public string GetCacheBundleFileLoadPath(PackageBundle bundle)
        {
-            return GetDataFilePath(bundle);
+            return GetBundleDataFilePath(bundle);
        }
        public string GetCachePackageHashFilePath(string packageVersion)
        {
            string fileName = YooAssetSettingsData.GetPackageHashFileName(PackageName, packageVersion);
-            return PathUtility.Combine(_manifestFileRoot, fileName);
+            return PathUtility.Combine(_cacheManifestFilesRoot, fileName);
        }
        public string GetCachePackageManifestFilePath(string packageVersion)
        {
            string fileName = YooAssetSettingsData.GetManifestBinaryFileName(PackageName, packageVersion);
-            return PathUtility.Combine(_manifestFileRoot, fileName);
+            return PathUtility.Combine(_cacheManifestFilesRoot, fileName);
        }
        public string GetSandboxAppFootPrintFilePath()
        {
-            return PathUtility.Combine(_manifestFileRoot, DefaultCacheFileSystemDefine.AppFootPrintFileName);
+            return PathUtility.Combine(_cacheManifestFilesRoot, DefaultCacheFileSystemDefine.AppFootPrintFileName);
+        }
+        public string GetCacheBundleFilesRoot()
+        {
+            return _cacheBundleFilesRoot;
+        }
+        public string GetCacheManifestFilesRoot()
+        {
+            return _cacheManifestFilesRoot;
        }

        /// <summary>
@@ -501,9 +517,9 @@ namespace YooAsset
        /// </summary>
        public void DeleteAllManifestFiles()
        {
-            if (Directory.Exists(_manifestFileRoot))
+            if (Directory.Exists(_cacheManifestFilesRoot))
            {
-                Directory.Delete(_manifestFileRoot, true);
+                Directory.Delete(_cacheManifestFilesRoot, true);
            }
        }

@@ -512,7 +528,7 @@ namespace YooAsset
        /// </summary>
        public DecryptResult LoadEncryptedAssetBundle(PackageBundle bundle)
        {
-            string filePath = GetCacheFileLoadPath(bundle);
+            string filePath = GetCacheBundleFileLoadPath(bundle);
            var fileInfo = new DecryptFileInfo()
            {
                BundleName = bundle.BundleName,
@@ -527,7 +543,7 @@ namespace YooAsset
        /// </summary>
        public DecryptResult LoadEncryptedAssetBundleAsync(PackageBundle bundle)
        {
-            string filePath = GetCacheFileLoadPath(bundle);
+            string filePath = GetCacheBundleFileLoadPath(bundle);
            var fileInfo = new DecryptFileInfo()
            {
                BundleName = bundle.BundleName,
@@ -4,27 +4,27 @@ namespace YooAsset
    internal class DefaultCacheFileSystemDefine
    {
        /// <summary>
-        /// 保存的数据文件名称
+        /// 数据文件名称
        /// </summary>
-        public const string SaveBundleDataFileName = "__data";
+        public const string BundleDataFileName = "__data";

        /// <summary>
-        /// 保存的信息文件名称
+        /// 信息文件名称
        /// </summary>
-        public const string SaveBundleInfoFileName = "__info";
+        public const string BundleInfoFileName = "__info";

        /// <summary>
-        /// 保存的资源文件的文件夹名称
+        /// 资源文件的文件夹名称
        /// </summary>
-        public const string SaveFilesFolderName = "CacheFiles";
+        public const string BundleFilesFolderName = "BundleFiles";

        /// <summary>
-        /// 下载的临时文件的文件夹名称
+        /// 临时文件的文件夹名称
        /// </summary>
-        public const string TempFilesFolderName = "CacheTempFiles";
+        public const string TempFilesFolderName = "TempFiles";

        /// <summary>
-        /// 保存的清单文件的文件夹名称
+        /// 清单文件的文件夹名称
        /// </summary>
        public const string ManifestFilesFolderName = "ManifestFiles";

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: da6402a4b93d31943b26fb99cebc0dfd
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,19 @@
+
+namespace YooAsset
+{
+    internal class RecordFileElement
+    {
+        public string InfoFilePath { private set; get; }
+        public string DataFilePath { private set; get; }
+        public string DataFileCRC { private set; get; }
+        public long DataFileSize { private set; get; }
+        
+        public RecordFileElement(string infoFilePath, string dataFilePath, string dataFileCRC, long dataFileSize)
+        {
+            InfoFilePath = infoFilePath;
+            DataFilePath = dataFilePath;
+            DataFileCRC = dataFileCRC;
+            DataFileSize = dataFileSize;
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: ae2176c4ea6fbb3478bf8757def34cd7
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,22 @@
+
+namespace YooAsset
+{
+    internal class TempFileElement
+    {
+        public string TempFilePath { private set; get; }
+        public string TempFileCRC { private set; get; }
+        public long TempFileSize { private set; get; }
+
+        /// <summary>
+        /// 注意：原子操作对象
+        /// </summary>
+        public volatile int Result = 0;
+
+        public TempFileElement(string filePath, string fileCRC, long fileSize)
+        {
+            TempFilePath = filePath;
+            TempFileCRC = fileCRC;
+            TempFileSize = fileSize;
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 220136fdc4a13d84e97b1249cfc65f3b
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,42 @@
+using System.IO;
+
+namespace YooAsset
+{
+    internal class VerifyFileElement
+    {
+        public string PackageName { private set; get; }
+        public string BundleGUID { private set; get; }
+        public string FileRootPath { private set; get; }
+        public string DataFilePath { private set; get; }
+        public string InfoFilePath { private set; get; }
+
+        public string DataFileCRC;
+        public long DataFileSize;
+
+        /// <summary>
+        /// 注意：原子操作对象
+        /// </summary>
+        public volatile int Result = 0;
+
+        public VerifyFileElement(string packageName, string bundleGUID, string fileRootPath, string dataFilePath, string infoFilePath)
+        {
+            PackageName = packageName;
+            BundleGUID = bundleGUID;
+            FileRootPath = fileRootPath;
+            DataFilePath = dataFilePath;
+            InfoFilePath = infoFilePath;
+        }
+
+        public void DeleteFiles()
+        {
+            try
+            {
+                Directory.Delete(FileRootPath, true);
+            }
+            catch (System.Exception e)
+            {
+                YooLogger.Warning($"Failed to delete cache bundle folder : {e}");
+            }
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 0c361449cdcbd8746ba3fb948798ae1b
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -57,7 +57,7 @@ namespace YooAsset
            {
                if (_searchCacheFilesOp == null)
                {
-                    _searchCacheFilesOp = new SearchCacheFilesOperation(_fileSystem, _fileSystem.PackageName, _fileSystem.AppendFileExtension);
+                    _searchCacheFilesOp = new SearchCacheFilesOperation(_fileSystem);
                    OperationSystem.StartOperation(_fileSystem.PackageName, _searchCacheFilesOp);
                }

@@ -72,7 +72,7 @@ namespace YooAsset
            {
                if (_verifyCacheFilesOp == null)
                {
-                    _verifyCacheFilesOp = new VerifyCacheFilesOperation(_fileSystem, _fileSystem.FileVerifyLevel, _searchCacheFilesOp.Result);
+                    _verifyCacheFilesOp = new VerifyCacheFilesOperation(_fileSystem, _searchCacheFilesOp.Result);
                    OperationSystem.StartOperation(_fileSystem.PackageName, _verifyCacheFilesOp);
                }

@@ -104,7 +104,7 @@ namespace YooAsset
                    }
                    else
                    {
-                        string filePath = _fileSystem.GetCacheFileLoadPath(_bundle);
+                        string filePath = _fileSystem.GetCacheBundleFileLoadPath(_bundle);
                        _assetBundle = AssetBundle.LoadFromFile(filePath);
                    }
                }
@@ -118,7 +118,7 @@ namespace YooAsset
                    }
                    else
                    {
-                        string filePath = _fileSystem.GetCacheFileLoadPath(_bundle);
+                        string filePath = _fileSystem.GetCacheBundleFileLoadPath(_bundle);
                        _createRequest = AssetBundle.LoadFromFileAsync(filePath);
                    }
                }
@@ -168,7 +168,7 @@ namespace YooAsset

                    // 注意：在安卓移动平台，华为和三星真机上有极小概率加载资源包失败。
                    // 说明：大多数情况在首次安装下载资源到沙盒内，游戏过程中切换到后台再回到游戏内有很大概率触发！
-                    string filePath = _fileSystem.GetCacheFileLoadPath(_bundle);
+                    string filePath = _fileSystem.GetCacheBundleFileLoadPath(_bundle);
                    byte[] fileData = FileUtility.ReadAllBytes(filePath);
                    if (fileData != null && fileData.Length > 0)
                    {
@@ -198,7 +198,7 @@ namespace YooAsset
                else
                {
                    _steps = ESteps.Done;
-                    _fileSystem.DeleteCacheFile(_bundle.BundleGUID);
+                    _fileSystem.DeleteCacheBundleFile(_bundle.BundleGUID);
                    Status = EOperationStatus.Failed;
                    Error = $"Find corrupted asset bundle file and delete : {_bundle.BundleName}";
                    YooLogger.Error(Error);
@@ -304,7 +304,7 @@ namespace YooAsset

            if (_steps == ESteps.LoadCacheRawBundle)
            {
-                string filePath = _fileSystem.GetCacheFileLoadPath(_bundle);
+                string filePath = _fileSystem.GetCacheBundleFileLoadPath(_bundle);
                if (File.Exists(filePath))
                {
                    _steps = ESteps.Done;
@@ -0,0 +1,67 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace YooAsset
+{
+    internal sealed class ClearAllCacheBundleFilesOperation : FSClearCacheFilesOperation
+    {
+        private enum ESteps
+        {
+            None,
+            GetAllCacheFiles,
+            ClearAllCacheFiles,
+            Done,
+        }
+
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private List<string> _allBundleGUIDs;
+        private int _fileTotalCount = 0;
+        private ESteps _steps = ESteps.None;
+
+
+        internal ClearAllCacheBundleFilesOperation(DefaultCacheFileSystem fileSystem)
+        {
+            _fileSystem = fileSystem;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.GetAllCacheFiles;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.GetAllCacheFiles)
+            {
+                _allBundleGUIDs = _fileSystem.GetAllCachedBundleGUIDs();
+                _fileTotalCount = _allBundleGUIDs.Count;
+                _steps = ESteps.ClearAllCacheFiles;
+                YooLogger.Log($"Found all cache files count : {_fileTotalCount}");
+            }
+
+            if (_steps == ESteps.ClearAllCacheFiles)
+            {
+                for (int i = _allBundleGUIDs.Count - 1; i >= 0; i--)
+                {
+                    string bundleGUID = _allBundleGUIDs[i];
+                    _fileSystem.DeleteCacheBundleFile(bundleGUID);
+                    _allBundleGUIDs.RemoveAt(i);
+                    if (OperationSystem.IsBusy)
+                        break;
+                }
+
+                if (_fileTotalCount == 0)
+                    Progress = 1.0f;
+                else
+                    Progress = 1.0f - (_allBundleGUIDs.Count / _fileTotalCount);
+
+                if (_allBundleGUIDs.Count == 0)
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+            }
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: daed187502431d347bf11bddcf8d77de
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,63 @@
+using System;
+using System.IO;
+
+namespace YooAsset
+{
+    internal sealed class ClearAllCacheManifestFilesOperation : FSClearCacheFilesOperation
+    {
+        private enum ESteps
+        {
+            None,
+            ClearAllCacheFiles,
+            Done,
+        }
+
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private ESteps _steps = ESteps.None;
+
+
+        internal ClearAllCacheManifestFilesOperation(DefaultCacheFileSystem fileSystem)
+        {
+            _fileSystem = fileSystem;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.ClearAllCacheFiles;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.ClearAllCacheFiles)
+            {
+                try
+                {
+                    // 注意：如果正在下载资源清单，会有几率触发异常！
+                    string directoryRoot = _fileSystem.GetCacheManifestFilesRoot();
+                    DirectoryInfo directoryInfo = new DirectoryInfo(directoryRoot);
+                    if (directoryInfo.Exists)
+                    {
+                        foreach (FileInfo fileInfo in directoryInfo.GetFiles())
+                        {
+                            string fileName = fileInfo.Name;
+                            if (fileName == DefaultCacheFileSystemDefine.AppFootPrintFileName)
+                                continue;
+
+                            fileInfo.Delete();
+                        }
+                    }
+
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+                catch (Exception ex)
+                {
+                    _steps = ESteps.Done;
+                    Error = ex.Message;
+                    Status = EOperationStatus.Failed;
+                }
+            }
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 5643382e7031ba14cbb4ab0f4a9acd94
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,120 @@
+using System.Collections.Generic;
+
+namespace YooAsset
+{
+    internal class ClearCacheBundleFilesByTagsOperaiton : FSClearCacheFilesOperation
+    {
+        private enum ESteps
+        {
+            None,
+            CheckArgs,
+            GetTagsCacheFiles,
+            ClearTagsCacheFiles,
+            Done,
+        }
+
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private readonly PackageManifest _manifest;
+        private readonly object _clearParam;
+        private string[] _tags;
+        private List<string> _clearBundleGUIDs;
+        private int _clearFileTotalCount = 0;
+        private ESteps _steps = ESteps.None;
+
+        internal ClearCacheBundleFilesByTagsOperaiton(DefaultCacheFileSystem fileSystem, PackageManifest manifest, object clearParam)
+        {
+            _fileSystem = fileSystem;
+            _manifest = manifest;
+            _clearParam = clearParam;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.CheckArgs;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.CheckArgs)
+            {
+                if (_clearParam == null)
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Failed;
+                    Error = "Clear param is null !";
+                    return;
+                }
+
+                if (_clearParam is string)
+                {
+                    _tags = new string[] { _clearParam as string };
+                }
+                else if (_clearParam is List<string>)
+                {
+                    var tempList = _clearParam as List<string>;
+                    _tags = tempList.ToArray();
+                }
+                else if (_clearParam is string[])
+                {
+                    _tags = _clearParam as string[];
+                }
+                else
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Failed;
+                    Error = $"Invalid clear param : {_clearParam.GetType().FullName}";
+                    return;
+                }
+
+                _steps = ESteps.GetTagsCacheFiles;
+            }
+
+            if (_steps == ESteps.GetTagsCacheFiles)
+            {
+                _clearBundleGUIDs = GetTagsBundleGUIDs();
+                _clearFileTotalCount = _clearBundleGUIDs.Count;
+                _steps = ESteps.ClearTagsCacheFiles;
+            }
+
+            if (_steps == ESteps.ClearTagsCacheFiles)
+            {
+                for (int i = _clearBundleGUIDs.Count - 1; i >= 0; i--)
+                {
+                    string bundleGUID = _clearBundleGUIDs[i];
+                    _fileSystem.DeleteCacheBundleFile(bundleGUID);
+                    _clearBundleGUIDs.RemoveAt(i);
+                    if (OperationSystem.IsBusy)
+                        break;
+                }
+
+                if (_clearFileTotalCount == 0)
+                    Progress = 1.0f;
+                else
+                    Progress = 1.0f - (_clearBundleGUIDs.Count / _clearFileTotalCount);
+
+                if (_clearBundleGUIDs.Count == 0)
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+            }
+        }
+        private List<string> GetTagsBundleGUIDs()
+        {
+            var allBundleGUIDs = _fileSystem.GetAllCachedBundleGUIDs();
+            List<string> result = new List<string>(allBundleGUIDs.Count);
+            foreach (var bundleGUID in allBundleGUIDs)
+            {
+                if (_manifest.TryGetPackageBundleByBundleGUID(bundleGUID, out PackageBundle bundle))
+                {
+                    if (bundle.HasTag(_tags))
+                    {
+                        result.Add(bundleGUID);
+                    }
+                }
+            }
+            return result;
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: c42345c14a903274fb160a813ee174dc
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,83 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace YooAsset
+{
+    internal sealed class ClearUnusedCacheBundleFilesOperation : FSClearCacheFilesOperation
+    {
+        private enum ESteps
+        {
+            None,
+            GetUnusedCacheFiles,
+            ClearUnusedCacheFiles,
+            Done,
+        }
+
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private readonly PackageManifest _manifest;
+        private List<string> _unusedBundleGUIDs;
+        private int _unusedFileTotalCount = 0;
+        private ESteps _steps = ESteps.None;
+
+        
+        internal ClearUnusedCacheBundleFilesOperation(DefaultCacheFileSystem fileSystem, PackageManifest manifest)
+        {
+            _fileSystem = fileSystem;
+            _manifest = manifest;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.GetUnusedCacheFiles;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.GetUnusedCacheFiles)
+            {    
+                _unusedBundleGUIDs = GetUnusedBundleGUIDs();
+                _unusedFileTotalCount = _unusedBundleGUIDs.Count;
+                _steps = ESteps.ClearUnusedCacheFiles;
+                YooLogger.Log($"Found unused cache files count : {_unusedFileTotalCount}");
+            }
+
+            if (_steps == ESteps.ClearUnusedCacheFiles)
+            {
+                for (int i = _unusedBundleGUIDs.Count - 1; i >= 0; i--)
+                {
+                    string bundleGUID = _unusedBundleGUIDs[i];
+                    _fileSystem.DeleteCacheBundleFile(bundleGUID);
+                    _unusedBundleGUIDs.RemoveAt(i);
+                    if (OperationSystem.IsBusy)
+                        break;
+                }
+
+                if (_unusedFileTotalCount == 0)
+                    Progress = 1.0f;
+                else
+                    Progress = 1.0f - (_unusedBundleGUIDs.Count / _unusedFileTotalCount);
+
+                if (_unusedBundleGUIDs.Count == 0)
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+            }
+        }
+
+        private List<string> GetUnusedBundleGUIDs()
+        {
+            var allBundleGUIDs = _fileSystem.GetAllCachedBundleGUIDs();
+            List<string> result = new List<string>(allBundleGUIDs.Count);
+            foreach (var bundleGUID in allBundleGUIDs)
+            {
+                if (_manifest.IsIncludeBundleFile(bundleGUID) == false)
+                {
+                    result.Add(bundleGUID);
+                }
+            }
+            return result;
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: be7b242f10abf524fa59e9ca0d12b052
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,70 @@
+using System;
+using System.IO;
+
+namespace YooAsset
+{
+    internal sealed class ClearUnusedCacheManifestFilesOperation : FSClearCacheFilesOperation
+    {
+        private enum ESteps
+        {
+            None,
+            ClearUnusedCacheFiles,
+            Done,
+        }
+
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private readonly PackageManifest _manifest;
+        private ESteps _steps = ESteps.None;
+
+
+        internal ClearUnusedCacheManifestFilesOperation(DefaultCacheFileSystem fileSystem, PackageManifest manifest)
+        {
+            _fileSystem = fileSystem;
+            _manifest = manifest;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.ClearUnusedCacheFiles;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.ClearUnusedCacheFiles)
+            {
+                try
+                {
+                    string activeManifestFileName = YooAssetSettingsData.GetManifestBinaryFileName(_manifest.PackageName, _manifest.PackageVersion);
+                    string activeHashFileName = YooAssetSettingsData.GetPackageHashFileName(_manifest.PackageName, _manifest.PackageVersion);
+
+                    // 注意：如果正在下载资源清单，会有几率触发异常！
+                    string directoryRoot = _fileSystem.GetCacheManifestFilesRoot();
+                    DirectoryInfo directoryInfo = new DirectoryInfo(directoryRoot);
+                    if (directoryInfo.Exists)
+                    {
+                        foreach (FileInfo fileInfo in directoryInfo.GetFiles())
+                        {
+                            string fileName = fileInfo.Name;
+                            if (fileName == DefaultCacheFileSystemDefine.AppFootPrintFileName)
+                                continue;
+                            if (fileName == activeManifestFileName || fileName == activeHashFileName)
+                                continue;
+
+                            fileInfo.Delete();
+                        }
+                    }
+
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+                catch (Exception ex)
+                {
+                    _steps = ESteps.Done;
+                    Error = ex.Message;
+                    Status = EOperationStatus.Failed;
+                }
+            }
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: d911513cf97d862448df570f0c8e9b38
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,87 @@
+using System;
+using System.IO;
+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 支持Unity2018版本的断点续传下载器
+    /// </summary>
+    internal class DownloadHandlerFileRange : DownloadHandlerScript
+    {
+        private string _fileSavePath;
+        private long _fileTotalSize;
+        private UnityWebRequest _webRequest;
+        private FileStream _fileStream;
+
+        private long _localFileSize = 0;
+        private long _curFileSize = 0;
+
+
+        public DownloadHandlerFileRange(string fileSavePath, long fileTotalSize, UnityWebRequest webRequest) : base(new byte[1024 * 1024])
+        {
+            _fileSavePath = fileSavePath;
+            _fileTotalSize = fileTotalSize;
+            _webRequest = webRequest;
+
+            if (File.Exists(fileSavePath))
+            {
+                FileInfo fileInfo = new FileInfo(fileSavePath);
+                _localFileSize = fileInfo.Length;
+            }
+
+            _fileStream = new FileStream(_fileSavePath, FileMode.Append, FileAccess.Write);
+            _curFileSize = _localFileSize;
+        }
+        protected override bool ReceiveData(byte[] data, int dataLength)
+        {
+            if (data == null || dataLength == 0 || _webRequest.responseCode >= 400)
+                return false;
+
+            if (_fileStream == null)
+                return false;
+
+            _fileStream.Write(data, 0, dataLength);
+            _curFileSize += dataLength;
+            return true;
+        }
+
+        /// <summary>
+        /// UnityWebRequest.downloadHandler.data
+        /// </summary>
+        protected override byte[] GetData()
+        {
+            return null;
+        }
+
+        /// <summary>
+        /// UnityWebRequest.downloadHandler.text
+        /// </summary>
+        protected override string GetText()
+        {
+            return null;
+        }
+
+        /// <summary>
+        /// UnityWebRequest.downloadProgress
+        /// </summary>
+        protected override float GetProgress()
+        {
+            return _fileTotalSize == 0 ? 0 : ((float)_curFileSize) / _fileTotalSize;
+        }
+
+        /// <summary>
+        /// 释放下载句柄
+        /// </summary>
+        public void Cleanup()
+        {
+            if (_fileStream != null)
+            {
+                _fileStream.Flush();
+                _fileStream.Dispose();
+                _fileStream = null;
+            }
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 94254ab8e4496214884c11a891c131c6
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,212 @@
+using System.IO;
+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    internal sealed class DownloadNormalFileOperation : DefaultDownloadFileOperation
+    {
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private VerifyTempFileOperation _verifyOperation;
+        private bool _isReuqestLocalFile;
+        private string _tempFilePath;
+        private ESteps _steps = ESteps.None;
+
+        internal DownloadNormalFileOperation(DefaultCacheFileSystem fileSystem, PackageBundle bundle, DownloadParam param) : base(bundle, param)
+        {
+            _fileSystem = fileSystem;
+        }
+        internal override void InternalOnStart()
+        {
+            _isReuqestLocalFile = DownloadSystemHelper.IsRequestLocalFile(Param.MainURL);
+            _tempFilePath = _fileSystem.GetTempFilePath(Bundle);
+            _steps = ESteps.CheckExists;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            // 检测文件是否存在
+            if (_steps == ESteps.CheckExists)
+            {
+                if (_fileSystem.Exists(Bundle))
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+                else
+                {
+                    _steps = ESteps.CreateRequest;
+                }
+            }
+
+            // 创建下载器
+            if (_steps == ESteps.CreateRequest)
+            {
+                FileUtility.CreateFileDirectory(_tempFilePath);
+
+                // 删除临时文件
+                if (File.Exists(_tempFilePath))
+                    File.Delete(_tempFilePath);
+
+                // 获取请求地址
+                _requestURL = GetRequestURL();
+
+                // 重置请求
+                ResetRequestFiled();
+
+                // 创建下载器
+                CreateWebRequest();
+
+                _steps = ESteps.CheckRequest;
+            }
+
+            // 检测下载结果
+            if (_steps == ESteps.CheckRequest)
+            {
+                DownloadProgress = _webRequest.downloadProgress;
+                DownloadedBytes = (long)_webRequest.downloadedBytes;
+                Progress = DownloadProgress;
+                if (_webRequest.isDone == false)
+                {
+                    CheckRequestTimeout();
+                    return;
+                }
+
+                // 检查网络错误
+                if (CheckRequestResult())
+                    _steps = ESteps.VerifyTempFile;
+                else
+                    _steps = ESteps.TryAgain;
+
+                // 注意：最终释放请求器
+                DisposeWebRequest();
+            }
+
+            // 验证下载文件
+            if (_steps == ESteps.VerifyTempFile)
+            {
+                var element = new TempFileElement(_tempFilePath, Bundle.FileCRC, Bundle.FileSize);
+                _verifyOperation = new VerifyTempFileOperation(element);
+                OperationSystem.StartOperation(_fileSystem.PackageName, _verifyOperation);
+                _steps = ESteps.CheckVerifyTempFile;
+            }
+
+            // 等待验证完成
+            if (_steps == ESteps.CheckVerifyTempFile)
+            {
+                if (IsWaitForAsyncComplete)
+                    _verifyOperation.WaitForAsyncComplete();
+
+                if (_verifyOperation.IsDone == false)
+                    return;
+
+                if (_verifyOperation.Status == EOperationStatus.Succeed)
+                {
+                    if (_fileSystem.WriteCacheBundleFile(Bundle, _tempFilePath))
+                    {
+                        _steps = ESteps.Done;
+                        Status = EOperationStatus.Succeed;
+                    }
+                    else
+                    {
+                        _steps = ESteps.Done;
+                        Status = EOperationStatus.Failed;
+                        Error = $"{_fileSystem.GetType().FullName} failed to write file !";
+                        YooLogger.Error(Error);
+                    }
+                }
+                else
+                {
+                    _steps = ESteps.TryAgain;
+                    Error = _verifyOperation.Error;
+                }
+
+                // 注意：验证完成后直接删除文件
+                if (File.Exists(_tempFilePath))
+                    File.Delete(_tempFilePath);
+            }
+
+            // 重新尝试下载
+            if (_steps == ESteps.TryAgain)
+            {
+                //TODO 拷贝本地文件失败后不再尝试！
+                if (_isReuqestLocalFile)
+                {
+                    Status = EOperationStatus.Failed;
+                    _steps = ESteps.Done;
+                    YooLogger.Error(Error);
+                    return;
+                }
+
+                if (FailedTryAgain <= 0)
+                {
+                    Status = EOperationStatus.Failed;
+                    _steps = ESteps.Done;
+                    YooLogger.Error(Error);
+                    return;
+                }
+
+                _tryAgainTimer += Time.unscaledDeltaTime;
+                if (_tryAgainTimer > 1f)
+                {
+                    FailedTryAgain--;
+                    _steps = ESteps.CreateRequest;
+                    YooLogger.Warning(Error);
+                }
+            }
+        }
+        internal override void InternalOnAbort()
+        {
+            _steps = ESteps.Done;
+            DisposeWebRequest();
+        }
+        internal override void InternalWaitForAsyncComplete()
+        {
+            //TODO 防止下载器挂起陷入无限死循环！
+            if (_steps == ESteps.None)
+            {
+                InternalOnStart();
+            }
+
+            while (true)
+            {
+                //TODO 如果是导入或解压本地文件，执行等待完毕
+                if (_isReuqestLocalFile)
+                {
+                    InternalOnUpdate();
+                    if (IsDone)
+                        break;
+                }
+                else
+                {
+                    if (ExecuteWhileDone())
+                    {
+                        _steps = ESteps.Done;
+                        break;
+                    }
+                }
+            }
+        }
+
+        private void CreateWebRequest()
+        {
+            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
+            DownloadHandlerFile handler = new DownloadHandlerFile(_tempFilePath);
+            handler.removeFileOnAbort = true;
+            _webRequest.downloadHandler = handler;
+            _webRequest.disposeDownloadHandlerOnDispose = true;
+            _webRequest.SendWebRequest();
+        }
+        private void DisposeWebRequest()
+        {
+            if (_webRequest != null)
+            {
+                //注意：引擎底层会自动调用Abort方法
+                _webRequest.Dispose();
+                _webRequest = null;
+            }
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 759967d543776a0469b625eff171d235
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,257 @@
+using System.Collections.Generic;
+using System.IO;
+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    internal sealed class DownloadResumeFileOperation : DefaultDownloadFileOperation
+    {
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private DownloadHandlerFileRange _downloadHandle;
+        private VerifyTempFileOperation _verifyOperation;
+        private bool _isReuqestLocalFile;
+        private long _fileOriginLength = 0;
+        private string _tempFilePath;
+        private ESteps _steps = ESteps.None;
+
+
+        internal DownloadResumeFileOperation(DefaultCacheFileSystem fileSystem, PackageBundle bundle, DownloadParam param) : base(bundle, param)
+        {
+            _fileSystem = fileSystem;
+        }
+        internal override void InternalOnStart()
+        {
+            _isReuqestLocalFile = DownloadSystemHelper.IsRequestLocalFile(Param.MainURL);
+            _tempFilePath = _fileSystem.GetTempFilePath(Bundle);
+            _steps = ESteps.CheckExists;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            // 检测文件是否存在
+            if (_steps == ESteps.CheckExists)
+            {
+                if (_fileSystem.Exists(Bundle))
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+                else
+                {
+                    _steps = ESteps.CreateRequest;
+                }
+            }
+
+            // 创建下载器
+            if (_steps == ESteps.CreateRequest)
+            {
+                FileUtility.CreateFileDirectory(_tempFilePath);
+
+                // 获取请求地址
+                _requestURL = GetRequestURL();
+
+                // 重置变量
+                ResetRequestFiled();
+
+                // 获取下载起始位置
+                _fileOriginLength = 0;
+                long fileBeginLength = -1;
+                if (File.Exists(_tempFilePath))
+                {
+                    FileInfo fileInfo = new FileInfo(_tempFilePath);
+                    if (fileInfo.Length >= Bundle.FileSize)
+                    {
+                        // 删除临时文件
+                        File.Delete(_tempFilePath);
+                    }
+                    else
+                    {
+                        fileBeginLength = fileInfo.Length;
+                        _fileOriginLength = fileBeginLength;
+                        DownloadedBytes = _fileOriginLength;
+                    }
+                }
+
+                // 创建下载器
+                CreateWebRequest(fileBeginLength);
+
+                _steps = ESteps.CheckRequest;
+            }
+
+            // 检测下载结果
+            if (_steps == ESteps.CheckRequest)
+            {
+                DownloadProgress = _webRequest.downloadProgress;
+                DownloadedBytes = _fileOriginLength + (long)_webRequest.downloadedBytes;
+                if (_webRequest.isDone == false)
+                {
+                    CheckRequestTimeout();
+                    return;
+                }
+
+                // 检查网络错误
+                if (CheckRequestResult())
+                    _steps = ESteps.VerifyTempFile;
+                else
+                    _steps = ESteps.TryAgain;
+
+                // 在遇到特殊错误的时候删除文件
+                ClearTempFileWhenError();
+
+                // 注意：最终释放请求器
+                DisposeWebRequest();
+            }
+
+            // 验证下载文件
+            if (_steps == ESteps.VerifyTempFile)
+            {
+                var element = new TempFileElement(_tempFilePath, Bundle.FileCRC, Bundle.FileSize);
+                _verifyOperation = new VerifyTempFileOperation(element);
+                OperationSystem.StartOperation(_fileSystem.PackageName, _verifyOperation);
+                _steps = ESteps.CheckVerifyTempFile;
+            }
+
+            // 等待验证完成
+            if (_steps == ESteps.CheckVerifyTempFile)
+            {
+                if (IsWaitForAsyncComplete)
+                    _verifyOperation.WaitForAsyncComplete();
+
+                if (_verifyOperation.IsDone == false)
+                    return;
+
+                if (_verifyOperation.Status == EOperationStatus.Succeed)
+                {
+                    if (_fileSystem.WriteCacheBundleFile(Bundle, _tempFilePath))
+                    {
+                        Status = EOperationStatus.Succeed;
+                        _steps = ESteps.Done;
+                    }
+                    else
+                    {
+                        Error = $"{_fileSystem.GetType().FullName} failed to write file !";
+                        Status = EOperationStatus.Failed;
+                        _steps = ESteps.Done;
+                    }
+                }
+                else
+                {
+                    Error = _verifyOperation.Error;
+                    _steps = ESteps.TryAgain;
+                }
+
+                // 注意：验证完成后直接删除文件
+                if (File.Exists(_tempFilePath))
+                    File.Delete(_tempFilePath);
+            }
+
+            // 重新尝试下载
+            if (_steps == ESteps.TryAgain)
+            {
+                //TODO 拷贝本地文件失败后不再尝试！
+                if (_isReuqestLocalFile)
+                {
+                    Status = EOperationStatus.Failed;
+                    _steps = ESteps.Done;
+                    YooLogger.Error(Error);
+                    return;
+                }
+
+                if (FailedTryAgain <= 0)
+                {
+                    Status = EOperationStatus.Failed;
+                    _steps = ESteps.Done;
+                    YooLogger.Error(Error);
+                    return;
+                }
+
+                _tryAgainTimer += Time.unscaledDeltaTime;
+                if (_tryAgainTimer > 1f)
+                {
+                    FailedTryAgain--;
+                    _steps = ESteps.CreateRequest;
+                    YooLogger.Warning(Error);
+                }
+            }
+        }
+        internal override void InternalOnAbort()
+        {
+            _steps = ESteps.Done;
+            DisposeWebRequest();
+        }
+        internal override void InternalWaitForAsyncComplete()
+        {
+            //TODO 防止下载器挂起陷入无限死循环！
+            if (_steps == ESteps.None)
+            {
+                InternalOnStart();
+            }
+
+            while (true)
+            {
+                //TODO 如果是导入或解压本地文件，执行等待完毕
+                if (_isReuqestLocalFile)
+                {
+                    InternalOnUpdate();
+                    if (IsDone)
+                        break;
+                }
+                else
+                {
+                    if (ExecuteWhileDone())
+                    {
+                        _steps = ESteps.Done;
+                        break;
+                    }
+                }
+            }
+        }
+
+        private void CreateWebRequest(long beginLength)
+        {
+            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
+#if UNITY_2019_4_OR_NEWER
+            var handler = new DownloadHandlerFile(_tempFilePath, true);
+            handler.removeFileOnAbort = false;
+#else
+            var handler = new DownloadHandlerFileRange(FileSavePath, Bundle.FileSize, _webRequest);
+            _downloadHandle = handler;
+#endif
+            _webRequest.downloadHandler = handler;
+            _webRequest.disposeDownloadHandlerOnDispose = true;
+            if (beginLength > 0)
+                _webRequest.SetRequestHeader("Range", $"bytes={beginLength}-");
+            _webRequest.SendWebRequest();
+        }
+        private void DisposeWebRequest()
+        {
+            if (_downloadHandle != null)
+            {
+                _downloadHandle.Cleanup();
+                _downloadHandle = null;
+            }
+
+            if (_webRequest != null)
+            {
+                //注意：引擎底层会自动调用Abort方法
+                _webRequest.Dispose();
+                _webRequest = null;
+            }
+        }
+        private void ClearTempFileWhenError()
+        {
+            if (_fileSystem.ResumeDownloadResponseCodes == null)
+                return;
+
+            //说明：如果遇到以下错误返回码，验证失败直接删除文件
+            if (_fileSystem.ResumeDownloadResponseCodes.Contains(HttpCode))
+            {
+                if (File.Exists(_tempFilePath))
+                    File.Delete(_tempFilePath);
+            }
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 9bfb785912326f942a31dc77762eb16a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,124 @@
+using System;
+using System.IO;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace YooAsset
+{
+    internal sealed class SearchCacheFilesOperation : AsyncOperationBase
+    {
+        private enum ESteps
+        {
+            None,
+            Prepare,
+            SearchFiles,
+            Done,
+        }
+
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private IEnumerator<DirectoryInfo> _filesEnumerator = null;
+        private float _verifyStartTime;
+        private ESteps _steps = ESteps.None;
+
+        /// <summary>
+        /// 需要验证的元素
+        /// </summary>
+        public readonly List<VerifyFileElement> Result = new List<VerifyFileElement>(5000);
+
+
+        internal SearchCacheFilesOperation(DefaultCacheFileSystem fileSystem)
+        {
+            _fileSystem = fileSystem;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.Prepare;
+            _verifyStartTime = UnityEngine.Time.realtimeSinceStartup;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.Prepare)
+            {
+                DirectoryInfo rootDirectory = new DirectoryInfo(_fileSystem.GetCacheBundleFilesRoot());
+                if (rootDirectory.Exists)
+                {
+                    var directorieInfos = rootDirectory.EnumerateDirectories();
+                    _filesEnumerator = directorieInfos.GetEnumerator();
+                }
+                _steps = ESteps.SearchFiles;
+            }
+
+            if (_steps == ESteps.SearchFiles)
+            {
+                if (SearchFiles())
+                    return;
+
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Succeed;
+                float costTime = UnityEngine.Time.realtimeSinceStartup - _verifyStartTime;
+                YooLogger.Log($"Search cache files elapsed time {costTime:f1} seconds");
+            }
+        }
+
+        private bool SearchFiles()
+        {
+            if (_filesEnumerator == null)
+                return false;
+
+            bool isFindItem;
+            while (true)
+            {
+                isFindItem = _filesEnumerator.MoveNext();
+                if (isFindItem == false)
+                    break;
+
+                var rootFoder = _filesEnumerator.Current;
+                var childDirectories = rootFoder.GetDirectories();
+                foreach (var chidDirectory in childDirectories)
+                {
+                    string bundleGUID = chidDirectory.Name;
+                    if (_fileSystem.IsRecordBundleFile(bundleGUID))
+                        continue;
+
+                    // 创建验证元素类
+                    string fileRootPath = chidDirectory.FullName;
+                    string dataFilePath = $"{fileRootPath}/{ DefaultCacheFileSystemDefine.BundleDataFileName}";
+                    string infoFilePath = $"{fileRootPath}/{ DefaultCacheFileSystemDefine.BundleInfoFileName}";
+
+                    // 存储的数据文件追加文件格式
+                    if (_fileSystem.AppendFileExtension)
+                    {
+                        string dataFileExtension = FindDataFileExtension(chidDirectory);
+                        if (string.IsNullOrEmpty(dataFileExtension) == false)
+                            dataFilePath += dataFileExtension;
+                    }
+
+                    var element = new VerifyFileElement(_fileSystem.PackageName, bundleGUID, fileRootPath, dataFilePath, infoFilePath);
+                    Result.Add(element);
+                }
+
+                if (OperationSystem.IsBusy)
+                    break;
+            }
+
+            return isFindItem;
+        }
+        private string FindDataFileExtension(DirectoryInfo directoryInfo)
+        {
+            string dataFileExtension = string.Empty;
+            var fileInfos = directoryInfo.GetFiles();
+            foreach (var fileInfo in fileInfos)
+            {
+                if (fileInfo.Name.StartsWith(DefaultCacheFileSystemDefine.BundleDataFileName))
+                {
+                    dataFileExtension = fileInfo.Extension;
+                    break;
+                }
+            }
+            return dataFileExtension;
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8adb017a806563548b1d4c47f7b343e2
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,173 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 缓存文件验证（线程版）
+    /// </summary>
+    internal sealed class VerifyCacheFilesOperation : AsyncOperationBase
+    {
+        private enum ESteps
+        {
+            None,
+            InitVerify,
+            UpdateVerify,
+            Done,
+        }
+
+        private readonly DefaultCacheFileSystem _fileSystem;
+        private readonly EFileVerifyLevel _fileVerifyLevel;
+        private List<VerifyFileElement> _waitingList;
+        private List<VerifyFileElement> _verifyingList;
+        private int _verifyMaxNum;
+        private int _verifyTotalCount;
+        private float _verifyStartTime;
+        private int _succeedCount;
+        private int _failedCount;
+        private ESteps _steps = ESteps.None;
+
+
+        internal VerifyCacheFilesOperation(DefaultCacheFileSystem fileSystem, List<VerifyFileElement> elements)
+        {
+            _fileSystem = fileSystem;
+            _waitingList = elements;
+            _fileVerifyLevel = fileSystem.FileVerifyLevel;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.InitVerify;
+            _verifyStartTime = UnityEngine.Time.realtimeSinceStartup;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.InitVerify)
+            {
+                int fileCount = _waitingList.Count;
+
+                // 设置同时验证的最大数
+                ThreadPool.GetMaxThreads(out int workerThreads, out int ioThreads);
+                YooLogger.Log($"Work threads : {workerThreads}, IO threads : {ioThreads}");
+                _verifyMaxNum = Math.Min(workerThreads, ioThreads);
+                _verifyTotalCount = fileCount;
+                if (_verifyMaxNum < 1)
+                    _verifyMaxNum = 1;
+
+                _verifyingList = new List<VerifyFileElement>(_verifyMaxNum);
+                _steps = ESteps.UpdateVerify;
+            }
+
+            if (_steps == ESteps.UpdateVerify)
+            {
+                // 检测校验结果
+                for (int i = _verifyingList.Count - 1; i >= 0; i--)
+                {
+                    var verifyElement = _verifyingList[i];
+                    int result = verifyElement.Result;
+                    if (result != 0)
+                    {
+                        _verifyingList.RemoveAt(i);
+                        RecordVerifyFile(verifyElement);
+                    }
+                }
+
+                Progress = GetProgress();
+                if (_waitingList.Count == 0 && _verifyingList.Count == 0)
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                    float costTime = UnityEngine.Time.realtimeSinceStartup - _verifyStartTime;
+                    YooLogger.Log($"Verify cache files elapsed time {costTime:f1} seconds");
+                }
+
+                for (int i = _waitingList.Count - 1; i >= 0; i--)
+                {
+                    if (OperationSystem.IsBusy)
+                        break;
+
+                    if (_verifyingList.Count >= _verifyMaxNum)
+                        break;
+
+                    var element = _waitingList[i];
+                    bool succeed = ThreadPool.QueueUserWorkItem(new WaitCallback(VerifyInThread), element);
+                    if (succeed)
+                    {
+                        _waitingList.RemoveAt(i);
+                        _verifyingList.Add(element);
+                    }
+                    else
+                    {
+                        YooLogger.Warning("The thread pool is failed queued.");
+                        break;
+                    }
+                }
+            }
+        }
+
+        private float GetProgress()
+        {
+            if (_verifyTotalCount == 0)
+                return 1f;
+            return (float)(_succeedCount + _failedCount) / _verifyTotalCount;
+        }
+        private void VerifyInThread(object obj)
+        {
+            VerifyFileElement element = (VerifyFileElement)obj;
+            int verifyResult = (int)VerifyingCacheFile(element, _fileVerifyLevel);
+            element.Result = verifyResult;
+        }
+        private void RecordVerifyFile(VerifyFileElement element)
+        {
+            if (element.Result == (int)EFileVerifyResult.Succeed)
+            {
+                _succeedCount++;
+                var recordFileElement = new RecordFileElement(element.InfoFilePath, element.DataFilePath, element.DataFileCRC, element.DataFileSize);
+                _fileSystem.RecordBundleFile(element.BundleGUID, recordFileElement);
+            }
+            else
+            {
+                _failedCount++;
+                YooLogger.Warning($"Failed to verify file {element.Result} and delete files : {element.FileRootPath}");
+                element.DeleteFiles();
+            }
+        }
+
+        /// <summary>
+        /// 验证缓存文件（子线程内操作）
+        /// </summary>
+        private EFileVerifyResult VerifyingCacheFile(VerifyFileElement element, EFileVerifyLevel verifyLevel)
+        {
+            try
+            {
+                if (verifyLevel == EFileVerifyLevel.Low)
+                {
+                    if (File.Exists(element.InfoFilePath) == false)
+                        return EFileVerifyResult.InfoFileNotExisted;
+                    if (File.Exists(element.DataFilePath) == false)
+                        return EFileVerifyResult.DataFileNotExisted;
+                    return EFileVerifyResult.Succeed;
+                }
+                else
+                {
+                    if (File.Exists(element.InfoFilePath) == false)
+                        return EFileVerifyResult.InfoFileNotExisted;
+
+                    // 解析信息文件获取验证数据
+                    _fileSystem.ReadBundleInfoFile(element.InfoFilePath, out element.DataFileCRC, out element.DataFileSize);
+                }
+            }
+            catch (Exception)
+            {
+                return EFileVerifyResult.Exception;
+            }
+
+            return FileVerifyHelper.FileVerify(element.DataFilePath, element.DataFileSize, element.DataFileCRC, verifyLevel);
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 5e9325baa24ae234ea0208d70dd3347e
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,88 @@
+using System;
+using System.Threading;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 下载文件验证（线程版）
+    /// </summary>
+    internal sealed class VerifyTempFileOperation : AsyncOperationBase
+    {
+        private enum ESteps
+        {
+            None,
+            VerifyFile,
+            Waiting,
+            Done,
+        }
+
+        private readonly TempFileElement _element;
+        private ESteps _steps = ESteps.None;
+
+        /// <summary>
+        /// 验证结果
+        /// </summary>
+        public EFileVerifyResult VerifyResult { private set; get; }
+
+
+        internal VerifyTempFileOperation(TempFileElement element)
+        {
+            _element = element;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.VerifyFile;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.VerifyFile)
+            {
+                bool succeed = ThreadPool.QueueUserWorkItem(new WaitCallback(VerifyInThread), _element);
+                if (succeed)
+                {
+                    _steps = ESteps.Waiting;
+                }
+            }
+
+            if (_steps == ESteps.Waiting)
+            {
+                int result = _element.Result;
+                if (result == 0)
+                    return;
+
+                VerifyResult = (EFileVerifyResult)result;
+                if (VerifyResult == EFileVerifyResult.Succeed)
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+                else
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Failed;
+                    Error = $"Failed to verify file : {_element.TempFilePath} ! ErrorCode : {VerifyResult}";
+                }
+            }
+        }
+        internal override void InternalWaitForAsyncComplete()
+        {
+            while (true)
+            {
+                //TODO 等待子线程验证文件完毕，该操作会挂起主线程
+                InternalOnUpdate();
+                if (IsDone)
+                    break;
+            }
+        }
+
+        private void VerifyInThread(object obj)
+        {
+            TempFileElement element = (TempFileElement)obj;
+            int result = (int)FileVerifyHelper.FileVerify(element.TempFilePath, element.TempFileSize, element.TempFileCRC, EFileVerifyLevel.High);
+            element.Result = result;
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 764ac4f47afd3be4a8d583578f51126d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: