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Assets/Plugins/UniTask/Runtime/Internal/UnityWebRequestExtensions.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using UnityEngine.Networking;
+
+namespace Cysharp.Threading.Tasks.Internal
+{
+#if ENABLE_UNITYWEBREQUEST && (!UNITY_2019_1_OR_NEWER || UNITASK_WEBREQUEST_SUPPORT)
+    
+    internal static class UnityWebRequestResultExtensions
+    {
+        public static bool IsError(this UnityWebRequest unityWebRequest)
+        {
+#if UNITY_2020_2_OR_NEWER
+            var result = unityWebRequest.result;
+            return (result == UnityWebRequest.Result.ConnectionError)
+                || (result == UnityWebRequest.Result.DataProcessingError)
+                || (result == UnityWebRequest.Result.ProtocolError);
+#else
+            return unityWebRequest.isHttpError || unityWebRequest.isNetworkError;
+#endif
+        }
+    }
+
+#endif
+}