Update AssetSystem

Assets/YooAsset/Runtime/AssetSystem/AssetSystem.cs

@@ -127,6 +127,18 @@ namespace YooAsset
 		}
 
 
+		/// <summary>
+		/// 异步加载原生文件
+		/// </summary>
+		public static RawFileOperation LoadRawFileAsync(string assetPath, string savePath)
+		{
+			string bundleName = BundleServices.GetBundleName(assetPath);
+			BundleInfo bundleInfo = BundleServices.GetBundleInfo(bundleName);
+			RawFileOperation operation = new RawFileOperation(bundleInfo, savePath);
+			OperationSystem.ProcessOperaiton(operation);
+			return operation;
+		}
+
 		/// <summary>
 		/// 异步加载场景
 		/// </summary>

Assets/YooAsset/Runtime/AssetSystem/Loader/AssetBundleLoader.cs

@@ -53,19 +53,6 @@ namespace YooAsset
 			Status = EStatus.None;
 		}
 
-		/// <summary>
-		/// 是否为场景加载器
-		/// </summary>
-		public bool IsSceneLoader()
-		{
-			foreach (var provider in _providers)
-			{
-				if (provider is BundledSceneProvider)
-					return true;
-			}
-			return false;
-		}
-
 		/// <summary>
 		/// 添加附属的资源提供者
 		/// </summary>

Assets/YooAsset/Runtime/AssetSystem/Operations/RawFileOperation.cs

@@ -0,0 +1,180 @@
+using System.IO;
+
+namespace YooAsset
+{
+	public class RawFileOperation : AsyncOperationBase
+	{
+		private enum ESteps
+		{
+			None,
+			Prepare,
+			DownloadFromWeb,
+			CheckDownloadFromWeb,
+			CheckFile,
+			DownloadFromApk,
+			CheckDownloadFromApk,
+			Done,
+		}
+
+		private readonly BundleInfo _bundleInfo;
+		private readonly string _savePath;
+		private ESteps _steps = ESteps.None;
+		private FileDownloader _fileDownloader;
+		private UnityWebFileRequester _fileRequester;
+
+		/// <summary>
+		/// 原生文件的存储路径
+		/// </summary>
+		public string SavePath
+		{
+			get { return _savePath; }
+		}
+
+
+		internal RawFileOperation(BundleInfo bundleInfo, string savePath)
+		{
+			_bundleInfo = bundleInfo;
+			_savePath = savePath;
+		}
+		internal override void Start()
+		{
+			_steps = ESteps.Prepare;
+		}
+		internal override void Update()
+		{
+			if (_steps == ESteps.None || _steps == ESteps.Done)
+				return;
+
+			// 1. 准备工作
+			if (_steps == ESteps.Prepare)
+			{
+				// 检测加载地址是否为空
+				if (string.IsNullOrEmpty(_bundleInfo.LocalPath))
+				{
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Failed;
+					Error = "Local path is null or empty.";
+					return;
+				}
+
+				if (string.IsNullOrEmpty(_bundleInfo.RemoteMainURL))
+					_steps = ESteps.CheckFile;
+				else
+					_steps = ESteps.DownloadFromWeb;
+			}
+
+			// 2. 从服务器下载
+			if (_steps == ESteps.DownloadFromWeb)
+			{
+				int failedTryAgain = int.MaxValue;
+				_fileDownloader = DownloadSystem.BeginDownload(_bundleInfo, failedTryAgain);
+				_steps = ESteps.CheckDownloadFromWeb;
+			}
+
+			// 3. 检测服务器下载结果
+			if (_steps == ESteps.CheckDownloadFromWeb)
+			{
+				if (_fileDownloader.IsDone() == false)
+					return;
+
+				if (_fileDownloader.HasError())
+				{
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Failed;
+					Error = _fileDownloader.GetLastError();
+				}
+				else
+				{
+					// 注意：当文件更新之后，需要删除旧文件			
+					if (File.Exists(_savePath))
+						File.Delete(_savePath);
+					_steps = ESteps.CheckFile;
+				}
+			}
+
+			// 4. 检测文件
+			if (_steps == ESteps.CheckFile)
+			{
+				// 注意：本地已经存在的文件不保证完整性
+				if (File.Exists(_savePath))
+				{
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Succeed;
+					return;
+				}
+
+				if (_bundleInfo.IsBuildinJarFile())
+				{
+					_steps = ESteps.DownloadFromApk;
+				}
+				else
+				{
+					try
+					{
+						File.Copy(_bundleInfo.LocalPath, _savePath, true);
+					}
+					catch (System.Exception e)
+					{
+						_steps = ESteps.Done;
+						Status = EOperationStatus.Failed;
+						Error = e.ToString();
+						return;
+					}
+
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Succeed;
+				}
+			}
+
+			// 5. 从APK拷贝文件
+			if (_steps == ESteps.DownloadFromApk)
+			{
+				string downloadURL = PathHelper.ConvertToWWWPath(_bundleInfo.LocalPath);
+				_fileRequester = new UnityWebFileRequester();
+				_fileRequester.SendRequest(downloadURL, _savePath);
+				_steps = ESteps.CheckDownloadFromApk;
+			}
+
+			// 6. 检测APK拷贝文件结果
+			if (_steps == ESteps.CheckDownloadFromApk)
+			{
+				if (_fileRequester.IsDone() == false)
+					return;
+
+				if (_fileRequester.HasError())
+				{
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Failed;
+					Error = _fileRequester.GetError();
+				}
+				else
+				{
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Succeed;
+				}
+
+				_fileRequester.Dispose();
+			}
+		}
+
+		/// <summary>
+		/// 获取原生文件的二进制数据
+		/// </summary>
+		public byte[] GetFileData()
+		{
+			if (File.Exists(_savePath) == false)
+				return null;
+			return File.ReadAllBytes(_savePath);
+		}
+		
+		/// <summary>
+		/// 获取原生文件的文本数据
+		/// </summary>
+		public string GetFileText()
+		{
+			if (File.Exists(_savePath) == false)
+				return string.Empty;
+			return File.ReadAllText(_savePath, System.Text.Encoding.UTF8);
+		}
+	}
+}

Assets/YooAsset/Runtime/AssetSystem/Operations/RawFileOperation.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: e26f14db9addb4c49b4f0f520bf75d9d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: