fix #169

Assets/YooAsset/Runtime/DownloadSystem/RequestHelper.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace YooAsset
+{
+	public class RequestHelper
+	{
+		/// <summary>
+		/// 记录网络请求失败事件的次数
+		/// </summary>
+		private static readonly Dictionary<string, int> _requestFailedRecorder = new Dictionary<string, int>(1000);
+
+		/// <summary>
+		/// 记录请求失败事件
+		/// </summary>
+		public static void RecordRequestFailed(string packageName, string eventName)
+		{
+			string key = $"{packageName}_{eventName}";
+			if (_requestFailedRecorder.ContainsKey(key) == false)
+				_requestFailedRecorder.Add(key, 0);
+			_requestFailedRecorder[key]++;
+		}
+
+		/// <summary>
+		/// 获取请求失败的次数
+		/// </summary>
+		public static int GetRequestFailedCount(string packageName, string eventName)
+		{
+			string key = $"{packageName}_{eventName}";
+			if (_requestFailedRecorder.ContainsKey(key) == false)
+				_requestFailedRecorder.Add(key, 0);
+			return _requestFailedRecorder[key];
+		}
+	}
+}

Assets/YooAsset/Runtime/DownloadSystem/RequestHelper.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: ca9b2c6456d21bb4e9eecd9dc820a641
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/PackageSystem/Operations/Internal/DownloadManifestOperation.cs

@@ -11,7 +11,6 @@ namespace YooAsset
 			Done,
 		}
 	
-		private static int RequestCount = 0;
 		private readonly IRemoteServices _remoteServices;
 		private readonly string _packageName;
 		private readonly string _packageVersion;
@@ -19,6 +18,7 @@ namespace YooAsset
 		private UnityWebFileRequester _downloader1;
 		private UnityWebFileRequester _downloader2;
 		private ESteps _steps = ESteps.None;
+		private int _requestCount = 0;
 
 		internal DownloadManifestOperation(IRemoteServices remoteServices, string packageName, string packageVersion, int timeout)
 		{
@@ -29,7 +29,7 @@ namespace YooAsset
 		}
 		internal override void Start()
 		{
-			RequestCount++;
+			_requestCount = RequestHelper.GetRequestFailedCount(_packageName, nameof(DownloadManifestOperation));
 			_steps = ESteps.DownloadPackageHashFile;
 		}
 		internal override void Update()
@@ -58,6 +58,7 @@ namespace YooAsset
 					_steps = ESteps.Done;
 					Status = EOperationStatus.Failed;
 					Error = _downloader1.GetError();
+					RequestHelper.RecordRequestFailed(_packageName, nameof(DownloadManifestOperation));
 				}
 				else
 				{
@@ -88,6 +89,7 @@ namespace YooAsset
 					_steps = ESteps.Done;
 					Status = EOperationStatus.Failed;
 					Error = _downloader2.GetError();
+					RequestHelper.RecordRequestFailed(_packageName, nameof(DownloadManifestOperation));
 				}
 				else
 				{
@@ -102,10 +104,10 @@ namespace YooAsset
 		private string GetDownloadRequestURL(string fileName)
 		{
 			// 轮流返回请求地址
-			if (RequestCount % 2 == 0)
-				return _remoteServices.GetRemoteFallbackURL(fileName);
-			else
+			if (_requestCount % 2 == 0)
 				return _remoteServices.GetRemoteMainURL(fileName);
+			else
+				return _remoteServices.GetRemoteFallbackURL(fileName);
 		}
 	}
 }

Assets/YooAsset/Runtime/PackageSystem/Operations/Internal/LoadRemoteManifestOperation.cs

@@ -13,7 +13,6 @@ namespace YooAsset
 			Done,
 		}
 
-		private static int RequestCount = 0;
 		private readonly IRemoteServices _remoteServices;
 		private readonly string _packageName;
 		private readonly string _packageVersion;
@@ -23,6 +22,7 @@ namespace YooAsset
 		private DeserializeManifestOperation _deserializer;
 		private byte[] _fileData;
 		private ESteps _steps = ESteps.None;
+		private int _requestCount = 0;
 
 		/// <summary>
 		/// 加载的清单实例
@@ -39,7 +39,7 @@ namespace YooAsset
 		}
 		internal override void Start()
 		{
-			RequestCount++;
+			_requestCount = RequestHelper.GetRequestFailedCount(_packageName, nameof(LoadRemoteManifestOperation));
 			_steps = ESteps.DownloadPackageHashFile;
 		}
 		internal override void Update()
@@ -90,6 +90,7 @@ namespace YooAsset
 					_steps = ESteps.Done;
 					Status = EOperationStatus.Failed;
 					Error = _downloader.GetError();
+					RequestHelper.RecordRequestFailed(_packageName, nameof(LoadRemoteManifestOperation));
 				}
 				else
 				{
@@ -141,10 +142,10 @@ namespace YooAsset
 		private string GetDownloadRequestURL(string fileName)
 		{
 			// 轮流返回请求地址
-			if (RequestCount % 2 == 0)
-				return _remoteServices.GetRemoteFallbackURL(fileName);
-			else
+			if (_requestCount % 2 == 0)
 				return _remoteServices.GetRemoteMainURL(fileName);
+			else
+				return _remoteServices.GetRemoteFallbackURL(fileName);
 		}
 	}
 }

Assets/YooAsset/Runtime/PackageSystem/Operations/Internal/QueryRemotePackageHashOperation.cs

@@ -10,13 +10,13 @@ namespace YooAsset
 			Done,
 		}
 		
-		private static int RequestCount = 0;
 		private readonly IRemoteServices _remoteServices;
 		private readonly string _packageName;
 		private readonly string _packageVersion;
 		private readonly int _timeout;
 		private UnityWebDataRequester _downloader;
 		private ESteps _steps = ESteps.None;
+		private int _requestCount = 0;
 
 		/// <summary>
 		/// 包裹哈希值
@@ -33,7 +33,7 @@ namespace YooAsset
 		}
 		internal override void Start()
 		{
-			RequestCount++;
+			_requestCount = RequestHelper.GetRequestFailedCount(_packageName, nameof(QueryRemotePackageHashOperation));
 			_steps = ESteps.DownloadPackageHash;
 		}
 		internal override void Update()
@@ -62,6 +62,7 @@ namespace YooAsset
 					_steps = ESteps.Done;
 					Status = EOperationStatus.Failed;
 					Error = _downloader.GetError();
+					RequestHelper.RecordRequestFailed(_packageName, nameof(QueryRemotePackageHashOperation));
 				}
 				else
 				{
@@ -88,10 +89,10 @@ namespace YooAsset
 			string url;
 
 			// 轮流返回请求地址
-			if (RequestCount % 2 == 0)
-				url = _remoteServices.GetRemoteFallbackURL(fileName);
-			else
+			if (_requestCount % 2 == 0)
 				url = _remoteServices.GetRemoteMainURL(fileName);
+			else
+				url = _remoteServices.GetRemoteFallbackURL(fileName);
 
 			return url;
 		}

Assets/YooAsset/Runtime/PackageSystem/Operations/Internal/QueryRemotePackageVersionOperation.cs

@@ -10,13 +10,13 @@ namespace YooAsset
 			Done,
 		}
 
-		private static int RequestCount = 0;
 		private readonly IRemoteServices _remoteServices;
 		private readonly string _packageName;
 		private readonly bool _appendTimeTicks;
 		private readonly int _timeout;
 		private UnityWebDataRequester _downloader;
 		private ESteps _steps = ESteps.None;
+		private int _requestCount = 0;
 
 		/// <summary>
 		/// 包裹版本
@@ -33,7 +33,7 @@ namespace YooAsset
 		}
 		internal override void Start()
 		{
-			RequestCount++;
+			_requestCount = RequestHelper.GetRequestFailedCount(_packageName, nameof(QueryRemotePackageVersionOperation));
 			_steps = ESteps.DownloadPackageVersion;
 		}
 		internal override void Update()
@@ -62,6 +62,7 @@ namespace YooAsset
 					_steps = ESteps.Done;
 					Status = EOperationStatus.Failed;
 					Error = _downloader.GetError();
+					RequestHelper.RecordRequestFailed(_packageName, nameof(QueryRemotePackageVersionOperation));
 				}
 				else
 				{
@@ -88,10 +89,10 @@ namespace YooAsset
 			string url;
 
 			// 轮流返回请求地址
-			if (RequestCount % 2 == 0)
-				url = _remoteServices.GetRemoteFallbackURL(fileName);
-			else
+			if (_requestCount % 2 == 0)
 				url = _remoteServices.GetRemoteMainURL(fileName);
+			else
+				url = _remoteServices.GetRemoteFallbackURL(fileName);
 
 			// 在URL末尾添加时间戳
 			if (_appendTimeTicks)