update file system

WebGL网页平台支持资源加密。
2026-05-25 18:20:15 +00:00 · 2025-02-12 16:27:30 +08:00
parent afc456de9a
commit 7936ba31ea
12 changed files with 262 additions and 49 deletions
--- a/Assets/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadWebEncryptAssetBundleOperation.cs
+++ b/Assets/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadWebEncryptAssetBundleOperation.cs
@@ -0,0 +1,144 @@
+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    internal class DownloadWebEncryptAssetBundleOperation : DownloadAssetBundleOperation
+    {
+        private readonly IWebDecryptionServices _decryptionServices;
+        private DownloadHandlerBuffer _downloadhandler;
+        private ESteps _steps = ESteps.None;
+
+        internal DownloadWebEncryptAssetBundleOperation(IWebDecryptionServices decryptionServices, PackageBundle bundle, DownloadParam param) : base(bundle, param)
+        {
+            _decryptionServices = decryptionServices;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.CreateRequest;
+        }
+        internal override void InternalOnUpdate()
+        {
+            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())
+                {
+                    if (_decryptionServices == null)
+                    {
+                        _steps = ESteps.Done;
+                        Status = EOperationStatus.Failed;
+                        Error = $"The {nameof(IWebDecryptionServices)} is null !";
+                        YooLogger.Error(Error);
+                        return;
+                    }
+
+                    AssetBundle assetBundle = LoadEncryptedAssetBundle(_downloadhandler.data);
+                    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 InternalOnAbort()
+        {
+            _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;
+        }
+    }
+}