update runtime code

1. 新增WebGL专属模式WebPlayMode

Assets/YooAsset/Runtime/DownloadSystem/UnityWebDataRequester.cs

@@ -2,38 +2,26 @@
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine.Networking;
+using UnityEngine;
 
 namespace YooAsset
 {
-	/// <summary>
-	/// 下载器
-	/// 说明：UnityWebRequest(UWR) supports reading streaming assets since 2017.1
-	/// </summary>
-	internal class UnityWebDataRequester
+	internal class UnityWebDataRequester : UnityWebRequesterBase
 	{
-		private UnityWebRequest _webRequest;
-		private UnityWebRequestAsyncOperation _operationHandle;
-
-		/// <summary>
-		/// 请求URL地址
-		/// </summary>
-		public string URL { private set; get; }
-
-
 		/// <summary>
 		/// 发送GET请求
 		/// </summary>
-		/// <param name="timeout">超时：从请求开始计时</param>
-		public void SendRequest(string url, int timeout = 0)
+		public void SendRequest(string url, int timeout = 60)
 		{
 			if (_webRequest == null)
 			{
 				URL = url;
+				ResetTimeout(timeout);
+
 				_webRequest = DownloadSystem.NewRequest(URL);
 				DownloadHandlerBuffer handler = new DownloadHandlerBuffer();
 				_webRequest.downloadHandler = handler;
 				_webRequest.disposeDownloadHandlerOnDispose = true;
-				_webRequest.timeout = timeout;
 				_operationHandle = _webRequest.SendWebRequest();
 			}
 		}
@@ -59,65 +47,5 @@ namespace YooAsset
 			else
 				return null;
 		}
-
-		/// <summary>
-		/// 释放下载器
-		/// </summary>
-		public void Dispose()
-		{
-			if (_webRequest != null)
-			{
-				_webRequest.Dispose();
-				_webRequest = null;
-				_operationHandle = null;
-			}
-		}
-
-		/// <summary>
-		/// 是否完毕（无论成功失败）
-		/// </summary>
-		public bool IsDone()
-		{
-			if (_operationHandle == null)
-				return false;
-			return _operationHandle.isDone;
-		}
-
-		/// <summary>
-		/// 下载进度
-		/// </summary>
-		public float Progress()
-		{
-			if (_operationHandle == null)
-				return 0;
-			return _operationHandle.progress;
-		}
-
-		/// <summary>
-		/// 下载是否发生错误
-		/// </summary>
-		public bool HasError()
-		{
-#if UNITY_2020_3_OR_NEWER
-			return _webRequest.result != UnityWebRequest.Result.Success;
-#else
-			if (_webRequest.isNetworkError || _webRequest.isHttpError)
-				return true;
-			else
-				return false;
-#endif
-		}
-
-		/// <summary>
-		/// 获取错误信息
-		/// </summary>
-		public string GetError()
-		{
-			if (_webRequest != null)
-			{
-				return $"URL : {URL} Error : {_webRequest.error}";
-			}
-			return string.Empty;
-		}
 	}
 }