IsBuffered()的UnsafeAccessor适配

Author: xljiulang

WebApiClientCore/ApiResponseContextExtensions.cs

@@ -54,9 +54,7 @@ public static class ApiResponseContextExtensions
             else
             {
                 var utf8Json = await content.ReadAsByteArrayAsync().ConfigureAwait(false);
-                return utf8Json.Length == 0
-                    ? objType.DefaultValue()
-                    : JsonSerializer.Deserialize(utf8Json, objType, options);
+                return utf8Json.Length == 0 ? objType.DefaultValue() : JsonSerializer.Deserialize(utf8Json, objType, options);
             }
         }
 

WebApiClientCore/System.Net.Http/HttpContentExtensions.cs

@@ -1,4 +1,5 @@
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
 using WebApiClientCore.Exceptions;
@@ -11,31 +12,48 @@ namespace System.Net.Http
     /// </summary>
     public static class HttpContentExtensions
     {
+        private const string IsBufferedPropertyName = "IsBuffered";
+        private const string IsBufferedGetMethodName = "get_IsBuffered";
+
         /// <summary>
         /// IsBuffered字段
         /// </summary>
-        private static readonly Func<HttpContent, bool>? isBuffered;
+        private static readonly Func<HttpContent, bool>? isBufferedFunc;
 
         /// <summary>
         /// 静态构造器
         /// </summary>
         static HttpContentExtensions()
         {
-            var property = typeof(HttpContent).GetProperty("IsBuffered", BindingFlags.Instance | BindingFlags.NonPublic);
+            var property = typeof(HttpContent).GetProperty(IsBufferedPropertyName, BindingFlags.Instance | BindingFlags.NonPublic);
             if (property != null)
             {
-                isBuffered = LambdaUtil.CreateGetFunc<HttpContent, bool>(property);
+#if NET8_0_OR_GREATER
+                if (property.GetGetMethod(nonPublic: true)?.Name == IsBufferedGetMethodName)
+                {
+                    isBufferedFunc = GetIsBuffered;
+                }
+#endif
+                if (isBufferedFunc == null)
+                {
+                    isBufferedFunc = LambdaUtil.CreateGetFunc<HttpContent, bool>(property);
+                }
             }
         }
 
+#if NET8_0_OR_GREATER
+        [UnsafeAccessor(UnsafeAccessorKind.Method, Name = IsBufferedGetMethodName)]
+        private static extern bool GetIsBuffered(HttpContent httpContent);
+#endif
+
         /// <summary>
         /// 获取是否已缓存数据 
         /// </summary>
         /// <param name="httpContent"></param>
         /// <returns></returns>
         public static bool? IsBuffered(this HttpContent httpContent)
         {
-            return isBuffered?.Invoke(httpContent);
+            return isBufferedFunc == null ? null : isBufferedFunc(httpContent);
         }
 
         /// <summary>