TEngine 6

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DefaultDownloadFileOperation.cs

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+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    internal abstract class DefaultDownloadFileOperation : FSDownloadFileOperation
+    {
+        protected enum ESteps
+        {
+            None,
+            CheckExists,
+            CreateRequest,
+            CheckRequest,
+            VerifyTempFile,
+            CheckVerifyTempFile,
+            TryAgain,
+            Done,
+        }
+
+        // 下载参数
+        protected readonly DownloadParam Param;
+
+        // 请求相关
+        protected UnityWebRequest _webRequest;
+        protected string _requestURL;
+        protected int _requestCount = 0;
+
+        // 超时相关
+        protected bool _isAbort = false;
+        protected long _latestDownloadBytes;
+        protected float _latestDownloadRealtime;
+        protected float _tryAgainTimer;
+
+        // 失败相关
+        protected int FailedTryAgain;
+
+
+        internal DefaultDownloadFileOperation(PackageBundle bundle, DownloadParam param) : base(bundle)
+        {
+            Param = param;
+            FailedTryAgain = param.FailedTryAgain;
+        }
+
+        /// <summary>
+        /// 获取网络请求地址
+        /// </summary>
+        protected string GetRequestURL()
+        {
+            // 轮流返回请求地址
+            _requestCount++;
+            if (_requestCount % 2 == 0)
+                return Param.FallbackURL;
+            else
+                return Param.MainURL;
+        }
+
+        /// <summary>
+        /// 重置请求字段
+        /// </summary>
+        protected void ResetRequestFiled()
+        {
+            // 重置变量
+            _isAbort = false;
+            _latestDownloadBytes = 0;
+            _latestDownloadRealtime = Time.realtimeSinceStartup;
+            DownloadProgress = 0f;
+            DownloadedBytes = 0;
+
+            // 重置计时器
+            if (_tryAgainTimer > 0f)
+                YooLogger.Warning($"Try again download : {_requestURL}");
+            _tryAgainTimer = 0f;
+        }
+
+        /// <summary>
+        /// 检测请求超时
+        /// </summary>
+        protected void CheckRequestTimeout()
+        {
+            // 注意：在连续时间段内无新增下载数据及判定为超时
+            if (_isAbort == false)
+            {
+                if (_latestDownloadBytes != DownloadedBytes)
+                {
+                    _latestDownloadBytes = DownloadedBytes;
+                    _latestDownloadRealtime = UnityEngine.Time.realtimeSinceStartup;
+                }
+
+                float offset = UnityEngine.Time.realtimeSinceStartup - _latestDownloadRealtime;
+                if (offset > Param.Timeout)
+                {
+                    YooLogger.Warning($"Download request timeout : {_requestURL}");
+                    if (_webRequest != null)
+                        _webRequest.Abort();
+                    _isAbort = true;
+                }
+            }
+        }
+
+        /// <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 = _webRequest.error;
+                return false;
+            }
+            else
+            {
+                return true;
+            }
+#else
+            if (_webRequest.isNetworkError || _webRequest.isHttpError)
+            {
+                Error = _webRequest.error;
+                return false;
+            }
+            else
+            {
+                return true;
+            }
+#endif
+        }
+    }
+}

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DefaultDownloadFileOperation.cs.meta

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+fileFormatVersion: 2
+guid: af07b7cdf729e944dbb6d60204c71235
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadAssetBundleOperation.cs

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+using UnityEngine;
+
+namespace YooAsset
+{
+    internal abstract class DownloadAssetBundleOperation : DefaultDownloadFileOperation
+    {
+        internal DownloadAssetBundleOperation(PackageBundle bundle, DownloadParam param) : base(bundle, param)
+        {
+        }
+
+        public AssetBundle Result;
+    }
+}

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadAssetBundleOperation.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 0f65d2f6038b95246b7a09cec4055b3a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadFileWrapper.cs

@@ -0,0 +1,71 @@
+
+namespace YooAsset
+{
+    internal class DownloadFileWrapper : FSDownloadFileOperation
+    {
+        private enum ESteps
+        {
+            None,
+            Download,
+            Done,
+        }
+
+        private readonly FSDownloadFileOperation _downloadFileOp;
+        private ESteps _steps = ESteps.None;
+
+        internal DownloadFileWrapper(FSDownloadFileOperation downloadFileOp) : base(downloadFileOp.Bundle)
+        {
+            _downloadFileOp = downloadFileOp;
+        }
+        internal override void InternalStart()
+        {
+            _steps = ESteps.Download;
+        }
+        internal override void InternalUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.Download)
+            {
+                if (IsWaitForAsyncComplete)
+                    _downloadFileOp.WaitForAsyncComplete();
+
+                if (_downloadFileOp.Status == EOperationStatus.None)
+                    return;
+
+                _downloadFileOp.UpdateOperation();
+                Progress = _downloadFileOp.Progress;
+                DownloadedBytes = _downloadFileOp.DownloadedBytes;
+                DownloadProgress = _downloadFileOp.DownloadProgress;
+                if (_downloadFileOp.IsDone == false)
+                    return;
+
+                _steps = ESteps.Done;
+                Status = _downloadFileOp.Status;
+                Error = _downloadFileOp.Error;
+                HttpCode = _downloadFileOp.HttpCode;
+            }
+        }
+        internal override void InternalWaitForAsyncComplete()
+        {
+            while (true)
+            {
+                if (ExecuteWhileDone())
+                {
+                    _steps = ESteps.Done;
+                    break;
+                }
+            }
+        }
+
+        public override void Release()
+        {
+            _downloadFileOp.Release();
+        }
+        public override void Reference()
+        {
+            _downloadFileOp.Reference();
+        }
+    }
+}

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadFileWrapper.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8088863fc7dfbd441bc897380cd7b97f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadWebEncryptAssetBundleOperation.cs

@@ -0,0 +1,157 @@
+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    internal class DownloadWebEncryptAssetBundleOperation : DownloadAssetBundleOperation
+    {
+        private readonly bool _checkTimeout;
+        private readonly IWebDecryptionServices _decryptionServices;
+        private DownloadHandlerBuffer _downloadhandler;
+        private ESteps _steps = ESteps.None;
+
+        internal DownloadWebEncryptAssetBundleOperation(bool checkTimeout, IWebDecryptionServices decryptionServices, PackageBundle bundle, DownloadParam param) : base(bundle, param)
+        {
+            _checkTimeout = checkTimeout;
+            _decryptionServices = decryptionServices;
+        }
+        internal override void InternalStart()
+        {
+            _steps = ESteps.CreateRequest;
+        }
+        internal override void InternalUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            // 创建下载器
+            if (_steps == ESteps.CreateRequest)
+            {
+                // 获取请求地址
+                _requestURL = GetRequestURL();
+
+                // 重置变量
+                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)
+                {
+                    if (_checkTimeout)
+                        CheckRequestTimeout();
+                    return;
+                }
+
+                // 检查网络错误
+                if (CheckRequestResult())
+                {
+                    if (_decryptionServices == null)
+                    {
+                        _steps = ESteps.Done;
+                        Status = EOperationStatus.Failed;
+                        Error = $"The {nameof(IWebDecryptionServices)} is null !";
+                        YooLogger.Error(Error);
+                        return;
+                    }
+
+                    var fileData = _downloadhandler.data;
+                    if (fileData == null || fileData.Length == 0)
+                    {
+                        _steps = ESteps.Done;
+                        Status = EOperationStatus.Failed;
+                        Error = $"The download handler data is null or empty !";
+                        YooLogger.Error(Error);
+                        return;
+                    }
+
+                    AssetBundle assetBundle = LoadEncryptedAssetBundle(fileData);
+                    if (assetBundle == null)
+                    {
+                        _steps = ESteps.Done;
+                        Status = EOperationStatus.Failed;
+                        Error = "Download handler asset bundle object is null !";
+                    }
+                    else
+                    {
+                        _steps = ESteps.Done;
+                        Result = assetBundle;
+                        Status = EOperationStatus.Succeed;
+                    }
+                }
+                else
+                {
+                    _steps = ESteps.TryAgain;
+                }
+
+                // 注意：最终释放请求器
+                DisposeWebRequest();
+            }
+
+            // 重新尝试下载
+            if (_steps == ESteps.TryAgain)
+            {
+                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 InternalAbort()
+        {
+            _steps = ESteps.Done;
+            DisposeWebRequest();
+        }
+
+        private void CreateWebRequest()
+        {
+            _downloadhandler = new DownloadHandlerBuffer();
+            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
+            _webRequest.downloadHandler = _downloadhandler;
+            _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;
+            }
+        }
+
+        /// <summary>
+        /// 加载加密资源文件
+        /// </summary>
+        private AssetBundle LoadEncryptedAssetBundle(byte[] fileData)
+        {
+            var fileInfo = new WebDecryptFileInfo();
+            fileInfo.BundleName = Bundle.BundleName;
+            fileInfo.FileLoadCRC = Bundle.UnityCRC;
+            fileInfo.FileData = fileData;
+            var decryptResult = _decryptionServices.LoadAssetBundle(fileInfo);
+            return decryptResult.Result;
+        }
+    }
+}

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadWebEncryptAssetBundleOperation.cs.meta

@@ -0,0 +1,11 @@
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+guid: 2f88823353464474faf7b020a76f9b2d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadWebNormalAssetBundleOperation.cs

@@ -0,0 +1,145 @@
+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    internal class DownloadWebNormalAssetBundleOperation : DownloadAssetBundleOperation
+    {
+        private readonly bool _disableUnityWebCache;
+        private DownloadHandlerAssetBundle _downloadhandler;
+        private ESteps _steps = ESteps.None;
+
+        internal DownloadWebNormalAssetBundleOperation(bool disableUnityWebCache, PackageBundle bundle, DownloadParam param) : base(bundle, param)
+        {
+            _disableUnityWebCache = disableUnityWebCache;
+        }
+        internal override void InternalStart()
+        {
+            _steps = ESteps.CreateRequest;
+        }
+        internal override void InternalUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            // 创建下载器
+            if (_steps == ESteps.CreateRequest)
+            {
+                // 获取请求地址
+                _requestURL = GetRequestURL();
+
+                // 重置变量
+                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())
+                {
+                    AssetBundle assetBundle = _downloadhandler.assetBundle;
+                    if (assetBundle == null)
+                    {
+                        _steps = ESteps.Done;
+                        Status = EOperationStatus.Failed;
+                        Error = "Download handler asset bundle object is null !";
+                    }
+                    else
+                    {
+                        _steps = ESteps.Done;
+                        Result = assetBundle;
+                        Status = EOperationStatus.Succeed;
+                    }
+                }
+                else
+                {
+                    _steps = ESteps.TryAgain;
+                }
+
+                // 注意：最终释放请求器
+                DisposeWebRequest();
+            }
+
+            // 重新尝试下载
+            if (_steps == ESteps.TryAgain)
+            {
+                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 InternalAbort()
+        {
+            _steps = ESteps.Done;
+            DisposeWebRequest();
+        }
+
+        private void CreateWebRequest()
+        {
+            _downloadhandler = CreateWebDownloadHandler();
+            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
+            _webRequest.downloadHandler = _downloadhandler;
+            _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;
+            }
+        }
+        private DownloadHandlerAssetBundle CreateWebDownloadHandler()
+        {
+            if (_disableUnityWebCache)
+            {
+                var downloadhandler = new DownloadHandlerAssetBundle(_requestURL, 0);
+#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.
+                uint unityCRC = Bundle.UnityCRC;
+                Hash128 fileHash = Hash128.Parse(Bundle.FileHash);
+                var downloadhandler = new DownloadHandlerAssetBundle(_requestURL, fileHash, unityCRC);
+#if UNITY_2020_3_OR_NEWER
+                downloadhandler.autoLoadAssetBundle = false;
+#endif
+                return downloadhandler;
+            }
+        }
+    }
+}

UnityProject/Packages/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadWebNormalAssetBundleOperation.cs.meta

@@ -0,0 +1,11 @@
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+  serializedVersion: 2
+  defaultReferences: []
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