【m】框架大更新

Assets/03.YooAsset/Runtime/DownloadSystem/Operation/Internal/UnityWebFileRequestOperation.cs

@@ -0,0 +1,83 @@
+using UnityEngine.Networking;
+using UnityEngine;
+
+namespace YooAsset
+{
+    internal class UnityWebFileRequestOperation : UnityWebRequestOperation
+    {
+        protected enum ESteps
+        {
+            None,
+            CreateRequest,
+            Download,
+            Done,
+        }
+
+        private UnityWebRequestAsyncOperation _requestOperation;
+        private readonly string _fileSavePath;
+        private ESteps _steps = ESteps.None;
+
+        /// <summary>
+        /// 响应的超时时间（单位：秒），在经过Timeout的秒数后尝试中止。
+        /// 注意：当Timeout设置为0时，不会应用超时。
+        /// 注意：设置的超时值可能应用于Android上的每个URL重定向，这可能会导致响应时间增加。
+        /// </summary>
+        private readonly int _timeout;
+
+
+        internal UnityWebFileRequestOperation(string url, string fileSavePath, int timeout) : base(url)
+        {
+            _fileSavePath = fileSavePath;
+            _timeout = timeout;
+        }
+        internal override void InternalStart()
+        {
+            _steps = ESteps.CreateRequest;
+        }
+        internal override void InternalUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.CreateRequest)
+            {
+                CreateWebRequest();
+                _steps = ESteps.Download;
+            }
+
+            if (_steps == ESteps.Download)
+            {
+                DownloadProgress = _webRequest.downloadProgress;
+                DownloadedBytes = (long)_webRequest.downloadedBytes;
+                Progress = _requestOperation.progress;
+                if (_requestOperation.isDone == false)
+                    return;
+
+                if (CheckRequestResult())
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Succeed;
+                }
+                else
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Failed;
+                }
+
+                // 注意：最终释放请求器
+                DisposeRequest();
+            }
+        }
+
+        private void CreateWebRequest()
+        {
+            DownloadHandlerFile handler = new DownloadHandlerFile(_fileSavePath);
+            handler.removeFileOnAbort = true;
+            _webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
+            _webRequest.timeout = _timeout;
+            _webRequest.downloadHandler = handler;
+            _webRequest.disposeDownloadHandlerOnDispose = true;
+            _requestOperation = _webRequest.SendWebRequest();
+        }
+    }
+}