Backported HTTP transport changes

src/All.slnx

@@ -273,6 +273,7 @@
   </Folder>
   <Folder Name="/HotChocolate/Utilities/" />
   <Folder Name="/HotChocolate/Utilities/src/">
+    <Project Path="HotChocolate/Utilities/src/Utilities.Buffers/HotChocolate.Utilities.Buffers.csproj" />
     <Project Path="HotChocolate/Utilities/src/Utilities.DependencyInjection/HotChocolate.Utilities.DependencyInjection.csproj" />
     <Project Path="HotChocolate/Utilities/src/Utilities.Introspection/HotChocolate.Utilities.Introspection.csproj" />
     <Project Path="HotChocolate/Utilities/src/Utilities/HotChocolate.Utilities.csproj" />

src/Directory.Packages.props

@@ -124,6 +124,7 @@
     <PackageVersion Include="Microsoft.Extensions.ObjectPool" Version="6.0.0" />
     <PackageVersion Include="System.Memory" Version="4.5.5" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
+    <PackageVersion Include="System.Text.Json" Version="8.0.5" />
   </ItemGroup>
   <ItemGroup Condition="'$(Configuration)' == 'debug'">
     <PackageVersion Include="Roslynator.Analyzers" Version="4.12.4" />

src/HotChocolate/AspNetCore/src/Transport.Abstractions/HotChocolate.Transport.Abstractions.csproj

@@ -15,6 +15,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\..\Language\src\Language.SyntaxTree\HotChocolate.Language.SyntaxTree.csproj" />
+    <ProjectReference Include="..\..\..\Utilities\src\Utilities.Buffers\HotChocolate.Utilities.Buffers.csproj" />
   </ItemGroup>
 
   <ItemGroup>

src/HotChocolate/AspNetCore/src/Transport.Abstractions/OperationResult.cs

@@ -1,4 +1,5 @@
 using System.Text.Json;
+using HotChocolate.Buffers;
 using static HotChocolate.Transport.Properties.TransportAbstractionResources;
 using static HotChocolate.Transport.Serialization.Utf8GraphQLResultProperties;
 
@@ -86,6 +87,21 @@ public OperationResult(
     public void Dispose()
         => _memoryOwner?.Dispose();
 
+    public static OperationResult Parse(JsonDocumentOwner documentOwner)
+    {
+        ArgumentNullException.ThrowIfNull(documentOwner);
+
+        var root = documentOwner.Document.RootElement;
+
+        return new OperationResult(
+            documentOwner,
+            root.TryGetProperty(DataProp, out var data) ? data : default,
+            root.TryGetProperty(ErrorsProp, out var errors) ? errors : default,
+            root.TryGetProperty(ExtensionsProp, out var extensions) ? extensions : default,
+            root.TryGetProperty(RequestIndexProp, out var requestIndex) ? requestIndex.GetInt32() : null,
+            root.TryGetProperty(VariableIndexProp, out var variableIndex) ? variableIndex.GetInt32() : null);
+    }
+
     public static OperationResult Parse(JsonDocument document)
     {
         if (document == null)