From ef0cc05f5cf59afccb23fd1b3989d3923c76048a Mon Sep 17 00:00:00 2001
From: hevinci <hevinci@hotmail.com>
Date: Fri, 10 Feb 2023 16:13:08 +0800
Subject: [PATCH] update cache system

---
 .../Runtime/CacheSystem/CacheFileInfo.cs      | 30 +++++++++++++++++--
 .../Runtime/CacheSystem/CacheSystem.cs        |  5 +---
 .../Downloader/FileDownloader.cs              | 22 +++++++-------
 .../Runtime/PatchSystem/PatchManifestTools.cs |  3 ++
 .../YooAsset/Runtime/Utility/BufferWriter.cs  |  8 +++++
 5 files changed, 51 insertions(+), 17 deletions(-)

diff --git a/Assets/YooAsset/Runtime/CacheSystem/CacheFileInfo.cs b/Assets/YooAsset/Runtime/CacheSystem/CacheFileInfo.cs
index 8097b02..e18e340 100644
--- a/Assets/YooAsset/Runtime/CacheSystem/CacheFileInfo.cs
+++ b/Assets/YooAsset/Runtime/CacheSystem/CacheFileInfo.cs
@@ -3,10 +3,34 @@ using System.IO;
 
 namespace YooAsset
 {
-	[Serializable]
 	internal class CacheFileInfo
 	{
-		public string FileCRC;
-		public long FileSize;
+		private static readonly BufferWriter SharedBuffer = new BufferWriter(1024);
+
+		/// <summary>
+		/// 写入资源包信息
+		/// </summary>
+		public static void WriteInfoToFile(string filePath, string dataFileCRC, long dataFileSize)
+		{
+			using (FileStream fs = new FileStream(filePath, FileMode.Create))
+			{
+				SharedBuffer.Clear();
+				SharedBuffer.WriteUTF8(dataFileCRC);
+				SharedBuffer.WriteInt64(dataFileSize);
+				SharedBuffer.WriteToStream(fs);
+				fs.Flush();
+			}
+		}
+
+		/// <summary>
+		/// 读取资源包信息
+		/// </summary>
+		public static void ReadInfoFromFile(string filePath, out string dataFileCRC, out long dataFileSize)
+		{
+			byte[] binaryData = FileUtility.ReadAllBytes(filePath);
+			BufferReader buffer = new BufferReader(binaryData);
+			dataFileCRC = buffer.ReadUTF8();
+			dataFileSize = buffer.ReadInt64();
+		}
 	}
 }
\ No newline at end of file
diff --git a/Assets/YooAsset/Runtime/CacheSystem/CacheSystem.cs b/Assets/YooAsset/Runtime/CacheSystem/CacheSystem.cs
index c7384ac..acb4b35 100644
--- a/Assets/YooAsset/Runtime/CacheSystem/CacheSystem.cs
+++ b/Assets/YooAsset/Runtime/CacheSystem/CacheSystem.cs
@@ -78,10 +78,7 @@ namespace YooAsset
 					return EVerifyResult.InfoFileNotExisted;
 
 				// 解析信息文件获取验证数据
-				string jsonContent = FileUtility.ReadAllText(infoFilePath);
-				CacheFileInfo fileInfo = UnityEngine.JsonUtility.FromJson<CacheFileInfo>(jsonContent);
-				element.DataFileCRC = fileInfo.FileCRC;
-				element.DataFileSize = fileInfo.FileSize;
+				CacheFileInfo.ReadInfoFromFile(infoFilePath, out element.DataFileCRC, out element.DataFileSize);
 			}
 			catch (Exception)
 			{
diff --git a/Assets/YooAsset/Runtime/DownloadSystem/Downloader/FileDownloader.cs b/Assets/YooAsset/Runtime/DownloadSystem/Downloader/FileDownloader.cs
index 9fab6be..b1fc6ef 100644
--- a/Assets/YooAsset/Runtime/DownloadSystem/Downloader/FileDownloader.cs
+++ b/Assets/YooAsset/Runtime/DownloadSystem/Downloader/FileDownloader.cs
@@ -220,22 +220,24 @@ namespace YooAsset
 			{
 				try
 				{
-					string destFilePath = _bundleInfo.Bundle.CachedDataFilePath;
-					if (File.Exists(destFilePath))
-						File.Delete(destFilePath);
+					string infoFilePath = _bundleInfo.Bundle.CachedInfoFilePath;
+					string dataFilePath = _bundleInfo.Bundle.CachedDataFilePath;
+					string dataFileCRC = _bundleInfo.Bundle.FileCRC;
+					long dataFileSize = _bundleInfo.Bundle.FileSize;
+
+					if (File.Exists(infoFilePath))
+						File.Delete(infoFilePath);		
+					if (File.Exists(dataFilePath))
+						File.Delete(dataFilePath);
 
 					FileInfo fileInfo = new FileInfo(_tempFilePath);
-					fileInfo.MoveTo(destFilePath);
+					fileInfo.MoveTo(dataFilePath);
 
 					// 写入信息文件记录验证数据
-					CacheFileInfo cacheInfo = new CacheFileInfo();
-					cacheInfo.FileCRC = _bundleInfo.Bundle.FileCRC;
-					cacheInfo.FileSize = _bundleInfo.Bundle.FileSize;
-					string jsonContent = UnityEngine.JsonUtility.ToJson(cacheInfo);
-					FileUtility.CreateFile(_bundleInfo.Bundle.CachedInfoFilePath, jsonContent);
+					CacheFileInfo.WriteInfoToFile(infoFilePath, dataFileCRC, dataFileSize);
 
 					// 记录缓存文件
-					var wrapper = new PackageCache.RecordWrapper(_bundleInfo.Bundle.CachedInfoFilePath, _bundleInfo.Bundle.CachedDataFilePath, _bundleInfo.Bundle.FileCRC, _bundleInfo.Bundle.FileSize);
+					var wrapper = new PackageCache.RecordWrapper(infoFilePath, dataFilePath, dataFileCRC, dataFileSize);
 					CacheSystem.RecordFile(_bundleInfo.Bundle.PackageName, _bundleInfo.Bundle.CacheGUID, wrapper);
 
 					_lastError = string.Empty;
diff --git a/Assets/YooAsset/Runtime/PatchSystem/PatchManifestTools.cs b/Assets/YooAsset/Runtime/PatchSystem/PatchManifestTools.cs
index 9aa38ee..3ca72ec 100644
--- a/Assets/YooAsset/Runtime/PatchSystem/PatchManifestTools.cs
+++ b/Assets/YooAsset/Runtime/PatchSystem/PatchManifestTools.cs
@@ -8,6 +8,8 @@ namespace YooAsset
 {
 	internal static class PatchManifestTools
 	{
+
+#if UNITY_EDITOR
 		/// <summary>
 		/// 序列化（JSON文件）
 		/// </summary>
@@ -151,6 +153,7 @@ namespace YooAsset
 
 			return manifest;
 		}
+#endif
 
 		/// <summary>
 		/// 生成Bundle文件的正式名称
diff --git a/Assets/YooAsset/Runtime/Utility/BufferWriter.cs b/Assets/YooAsset/Runtime/Utility/BufferWriter.cs
index 225939e..940b438 100644
--- a/Assets/YooAsset/Runtime/Utility/BufferWriter.cs
+++ b/Assets/YooAsset/Runtime/Utility/BufferWriter.cs
@@ -28,6 +28,14 @@ namespace YooAsset
 			get { return _buffer.Length; }
 		}
 
+		/// <summary>
+		/// 清空缓冲区
+		/// </summary>
+		public void Clear()
+		{
+			_index = 0;
+		}
+
 		/// <summary>
 		/// 将有效数据写入文件流
 		/// </summary>