From f0563cce0bfdb3af08b363f71dcf28f8ff510efa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=BD=95=E5=86=A0=E5=B3=B0?= <hevinci@hotmail.com>
Date: Wed, 7 Jan 2026 15:52:32 +0800
Subject: [PATCH] =?UTF-8?q?refactor=20:=20=E9=87=8D=E6=9E=84=E7=BD=91?=
 =?UTF-8?q?=E7=BB=9C=E4=B8=8B=E8=BD=BD=E6=A8=A1=E5=9D=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../UnityWebRequestAssetBundleDownloader.cs                 | 3 +++
 .../YooAsset/Runtime/DownloadSystem/DownloadSystemHelper.cs | 4 ++--
 Assets/YooAsset/Runtime/DownloadSystem/README.md            | 3 +--
 Assets/YooAsset/Runtime/DownloadSystem/WebRequestCounter.cs | 6 +++---
 4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestAssetBundleDownloader.cs b/Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestAssetBundleDownloader.cs
index 8be0c9c2..feea31a9 100644
--- a/Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestAssetBundleDownloader.cs
+++ b/Assets/YooAsset/Runtime/DownloadSystem/DefaultDownloadRequest/UnityWebRequestAssetBundleDownloader.cs
@@ -75,6 +75,9 @@ namespace YooAsset
             }
             else
             {
+                if (string.IsNullOrEmpty(_args.FileHash))
+                    throw new YooInternalException("File hash is null or empty !");
+
                 // 使用 Unity 缓存
                 // 说明：The file hash defining the version of the asset bundle.
                 Hash128 fileHash = Hash128.Parse(_args.FileHash);
diff --git a/Assets/YooAsset/Runtime/DownloadSystem/DownloadSystemHelper.cs b/Assets/YooAsset/Runtime/DownloadSystem/DownloadSystemHelper.cs
index f863affc..626840b6 100644
--- a/Assets/YooAsset/Runtime/DownloadSystem/DownloadSystemHelper.cs
+++ b/Assets/YooAsset/Runtime/DownloadSystem/DownloadSystemHelper.cs
@@ -57,7 +57,7 @@ namespace YooAsset
 #elif UNITY_STANDALONE_LINUX
             url = StringUtility.Format("file:///root/{0}", path);
 #else
-            throw new System.NotImplementedException();
+            throw new System.NotSupportedException($"[{nameof(DownloadSystemHelper.ConvertToWWWPath)}] not implemented platform: {UnityEngine.Application.platform}");
 #endif
 
             // For some special cases when users have special characters in their devices, url paths can not be identified correctly.
@@ -82,4 +82,4 @@ namespace YooAsset
             return false;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Assets/YooAsset/Runtime/DownloadSystem/README.md b/Assets/YooAsset/Runtime/DownloadSystem/README.md
index 26cdff6c..1f857d95 100644
--- a/Assets/YooAsset/Runtime/DownloadSystem/README.md
+++ b/Assets/YooAsset/Runtime/DownloadSystem/README.md
@@ -530,9 +530,8 @@ VirtualFileDownloader (独立实现) ──► IDownloadFileRequest
 
 提供跨平台的工具函数：
 
-| 成员 | 说明 |
+| 方法 | 说明 |
 |------|------|
-| `UnityWebRequestCreater` | 兼容保留的全局 UnityWebRequest 创建委托（默认文件系统不再读取，推荐改为 FileSystemParameters 注入） |
 | `ConvertToWWWPath()` | 转换本地路径为 WWW 协议 URL |
 | `IsRequestLocalFile()` | 判断是否本地文件请求 |
 
diff --git a/Assets/YooAsset/Runtime/DownloadSystem/WebRequestCounter.cs b/Assets/YooAsset/Runtime/DownloadSystem/WebRequestCounter.cs
index e06c7cfc..ca9af545 100644
--- a/Assets/YooAsset/Runtime/DownloadSystem/WebRequestCounter.cs
+++ b/Assets/YooAsset/Runtime/DownloadSystem/WebRequestCounter.cs
@@ -41,9 +41,9 @@ namespace YooAsset
         public static int GetRequestFailedCount(string packageName, string eventName)
         {
             string key = $"{packageName}_{eventName}";
-            if (_requestFailedRecorder.ContainsKey(key) == false)
-                _requestFailedRecorder.Add(key, 0);
-            return _requestFailedRecorder[key];
+            if (_requestFailedRecorder.TryGetValue(key, out int count))
+                return count;
+            return 0;
         }
     }
 }