update web file system

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

@@ -57,7 +57,7 @@ namespace YooAsset
             // 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 != _webRequest.downloadedBytes)
+                if ( _latestDownloadBytes != _webRequest.downloadedBytes)
                 {
                     _latestDownloadBytes = _webRequest.downloadedBytes;
                     _latestDownloadRealtime = Time.realtimeSinceStartup;

Assets/YooAsset/Runtime/FileSystem/DefaultWebFileSystem/DefaultWebFileSystem.cs

@@ -61,12 +61,20 @@ namespace YooAsset
         }
 
         #region 自定义参数
-        public bool AllowCrossAccess { private set; get; } = false;
-
         /// <summary>
         /// 自定义参数：远程服务接口
         /// </summary>
         public IRemoteServices RemoteServices { private set; get; } = null;
+
+        /// <summary>
+        /// 禁用Unity的网络缓存
+        /// </summary>
+        public bool DisableUnityWebCache { private set; get; } = false;
+
+        /// <summary>
+        /// 允许跨域访问和下载
+        /// </summary>
+        public bool AllowCrossAccess { private set; get; } = false;
         #endregion
 
 
@@ -124,14 +132,18 @@ namespace YooAsset
 
         public virtual void SetParameter(string name, object value)
         {
-            if (name == "ALLOW_CROSS_ACCESS")
+            if (name == "REMOTE_SERVICES")
-            {
-                AllowCrossAccess = (bool)value;
-            }
-            else if (name == "REMOTE_SERVICES")
             {
                 RemoteServices = (IRemoteServices)value;
             }
+            else if (name == "DISABLE_UNITY_WEB_CACHE")
+            {
+                DisableUnityWebCache = (bool)value;
+            }
+            else if (name == "ALLOW_CROSS_ACCESS")
+            {
+                AllowCrossAccess = (bool)value;
+            }
             else
             {
                 YooLogger.Warning($"Invalid parameter : {name}");

Assets/YooAsset/Runtime/FileSystem/DefaultWebFileSystem/Operation/DWFSDownloadFileOperation.cs

@@ -110,20 +110,34 @@ namespace YooAsset
 
         private void CreateWebRequest()
         {
-            uint unityCRC = Bundle.UnityCRC;
-            Hash128 fileHash = Hash128.Parse(Bundle.FileHash);
-
-            // 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.
             _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
-            _downloadhandler = new DownloadHandlerAssetBundle(_requestURL, fileHash, unityCRC);
+            _webRequest.downloadHandler = CreateDownloadHandler();
-#if UNITY_2020_3_OR_NEWER
-            _downloadhandler.autoLoadAssetBundle = false;
-#endif
-            _webRequest.downloadHandler = _downloadhandler;
             _webRequest.disposeDownloadHandlerOnDispose = true;
             _webRequest.SendWebRequest();
         }
+        private DownloadHandlerAssetBundle CreateDownloadHandler()
+        {
+            if (_fileSystem.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;
+            }
+        }
         private void DisposeWebRequest()
         {
             if (_webRequest != null)

Assets/YooAsset/Runtime/InitializeParameters.cs

@@ -160,10 +160,11 @@ namespace YooAsset
         /// <summary>
         /// 创建默认的Web文件系统参数
         /// </summary>
-        public static FileSystemParameters CreateDefaultWebFileSystemParameters()
+        public static FileSystemParameters CreateDefaultWebFileSystemParameters(bool disableUnityWebCache = false)
         {
             string fileSystemClass = typeof(DefaultWebFileSystem).FullName;
             var fileSystemParams = new FileSystemParameters(fileSystemClass, null);
+            fileSystemParams.AddParameter("DISABLE_UNITY_WEB_CACHE", disableUnityWebCache);
             fileSystemParams.AddParameter("ALLOW_CROSS_ACCESS", false);
             return fileSystemParams;
         }
@@ -172,12 +173,13 @@ namespace YooAsset
         /// 创建默认的Web文件系统参数
         /// </summary>
         /// <param name="remoteServices">远端资源地址查询服务类</param>
-        public static FileSystemParameters CreateDefaultWebFileSystemParameters(IRemoteServices remoteServices)
+        public static FileSystemParameters CreateDefaultWebFileSystemParameters(IRemoteServices remoteServices, bool disableUnityWebCache = false)
         {
             string fileSystemClass = typeof(DefaultWebFileSystem).FullName;
             var fileSystemParams = new FileSystemParameters(fileSystemClass, null);
-            fileSystemParams.AddParameter("ALLOW_CROSS_ACCESS", true);
             fileSystemParams.AddParameter("REMOTE_SERVICES", remoteServices);
+            fileSystemParams.AddParameter("DISABLE_UNITY_WEB_CACHE", disableUnityWebCache);
+            fileSystemParams.AddParameter("ALLOW_CROSS_ACCESS", true);
             return fileSystemParams;
         }
     }