Merge from 'release/6.0-rc1' into 'release/6.0' (#35588)

* [release/6.0-rc1] Update dependencies from dotnet/runtime dotnet/efcore (#35513)

* Set HttpSys read error log levels to debug #35490 (#35542)

Co-authored-by: Chris R <[email protected]>

* [release/6.0-rc1] Treat reference type parameters in oblivious nullability context as optional (#35526)

* Treat parameters in oblivious nullability context as optional

* Only apply fix for reference types

* Update optionality check in API descriptor

* Update check in BindAsync and Mvc.ApiExplorer test

* HTTP/3: Use new QuicStream.ReadsCompleted property in transport (#35483)

Co-authored-by: James Newton-King <[email protected]>

* HTTP/3: Fix incorrectly pooling aborted streams (#35441)

* [release/6.0-rc1] Binding support for 'bool' values with InputRadioGroup and InputSelect (#35523)

* Binding support for 'bool' values with InputRadioGroup and InputSelect (#35318)

* Update CodeCheck.ps1

Co-authored-by: Brennan <[email protected]>

* [release/6.0-rc1] Update dependencies from dotnet/efcore dotnet/runtime (#35558)

* Update dependencies from https://github.com/dotnet/efcore build 20210820.19

Microsoft.EntityFrameworkCore.Tools , dotnet-ef , Microsoft.EntityFrameworkCore , Microsoft.EntityFrameworkCore.SqlServer , Microsoft.EntityFrameworkCore.InMemory , Microsoft.EntityFrameworkCore.Relational , Microsoft.EntityFrameworkCore.Sqlite , Microsoft.EntityFrameworkCore.Design
 From Version 6.0.0-rc.1.21420.8 -> To Version 6.0.0-rc.1.21420.19

* Update dependencies from https://github.com/dotnet/efcore build 20210820.22

Microsoft.EntityFrameworkCore.Tools , dotnet-ef , Microsoft.EntityFrameworkCore , Microsoft.EntityFrameworkCore.SqlServer , Microsoft.EntityFrameworkCore.InMemory , Microsoft.EntityFrameworkCore.Relational , Microsoft.EntityFrameworkCore.Sqlite , Microsoft.EntityFrameworkCore.Design
 From Version 6.0.0-rc.1.21420.8 -> To Version 6.0.0-rc.1.21420.22

* Update dependencies from https://github.com/dotnet/efcore build 20210820.30

Microsoft.EntityFrameworkCore.Tools , dotnet-ef , Microsoft.EntityFrameworkCore , Microsoft.EntityFrameworkCore.SqlServer , Microsoft.EntityFrameworkCore.InMemory , Microsoft.EntityFrameworkCore.Relational , Microsoft.EntityFrameworkCore.Sqlite , Microsoft.EntityFrameworkCore.Design
 From Version 6.0.0-rc.1.21420.8 -> To Version 6.0.0-rc.1.21420.30

* Update dependencies from https://github.com/dotnet/runtime build 20210820.15

Microsoft.NETCore.Platforms , Microsoft.NETCore.BrowserDebugHost.Transport , Microsoft.NETCore.App.Runtime.win-x64 , Microsoft.Win32.SystemEvents , Microsoft.NET.Runtime.MonoAOTCompiler.Task , Microsoft.Internal.Runtime.AspNetCore.Transport , Microsoft.Extensions.Primitives , Microsoft.Extensions.Options.DataAnnotations , Microsoft.Extensions.Options.ConfigurationExtensions , Microsoft.NET.Runtime.WebAssembly.Sdk , Microsoft.Extensions.Options , Microsoft.Extensions.Logging.TraceSource , Microsoft.Extensions.Logging.EventSource , Microsoft.Extensions.Configuration.UserSecrets , Microsoft.Extensions.Configuration.Json , Microsoft.Extensions.Configuration.Ini , Microsoft.Extensions.Configuration.FileExtensions , Microsoft.Extensions.Configuration.EnvironmentVariables , Microsoft.Extensions.Configuration.CommandLine , Microsoft.Extensions.Configuration.Binder , Microsoft.Extensions.Configuration.Xml , Microsoft.Extensions.Configuration.Abstractions , Microsoft.Extensions.Caching.Memory , Microsoft.Extensions.Caching.Abstractions , Microsoft.Extensions.Configuration , Microsoft.Extensions.DependencyInjection , Microsoft.Extensions.DependencyInjection.Abstractions , Microsoft.Extensions.Logging.EventLog , Microsoft.Extensions.Logging.Debug , Microsoft.Extensions.Logging.Console , Microsoft.Extensions.Logging.Configuration , Microsoft.Extensions.Logging.Abstractions , Microsoft.Extensions.Logging , Microsoft.Extensions.Http , Microsoft.Extensions.Hosting.Abstractions , Microsoft.Extensions.Hosting , Microsoft.Extensions.HostFactoryResolver.Sources , Microsoft.Extensions.FileSystemGlobbing , Microsoft.Extensions.FileProviders.Physical , Microsoft.Extensions.FileProviders.Composite , Microsoft.Extensions.FileProviders.Abstractions , Microsoft.Extensions.DependencyModel , Microsoft.NETCore.App.Runtime.AOT.win-x64.Cross.browser-wasm , Microsoft.NETCore.App.Ref , System.Windows.Extensions , System.Threading.Channels , System.Text.Json , System.Text.Encodings.Web , System.ServiceProcess.ServiceController , System.Drawing.Common , System.DirectoryServices.Protocols , System.Diagnostics.EventLog , System.Diagnostics.DiagnosticSource , System.IO.Pipelines , System.Security.Permissions , System.Security.Cryptography.Xml , System.Security.Cryptography.Pkcs , System.Runtime.CompilerServices.Unsafe , System.Resources.Extensions , System.Reflection.Metadata , System.Net.Http.WinHttpHandler , System.Net.Http.Json
 From Version 6.0.0-rc.1.21420.7 -> To Version 6.0.0-rc.1.21420.15

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

* Improve Minimal APIs support for request media types #35082 (#35230) (#35579)

* add support for request media types

* [release/6.0-rc1] Update dependencies from dotnet/efcore dotnet/runtime (#35573)

Co-authored-by: dotnet-maestro[bot] <42748379+dotnet-maestro[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Chris R <[email protected]>
Co-authored-by: Safia Abdalla <[email protected]>
Co-authored-by: James Newton-King <[email protected]>
Co-authored-by: Mackinnon Buck <[email protected]>
Co-authored-by: Brennan <[email protected]>
Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
Co-authored-by: Rafiki Assumani <[email protected]>

Author: 9 people

eng/scripts/CodeCheck.ps1

@@ -213,7 +213,7 @@ try {
                     }
                 }
                 # Check for changes in Unshipped in servicing branches
-                if ($targetBranch -like 'release*' -and $targetBranch -notlike '*preview*' -and $file -like '*PublicAPI.Unshipped.txt') {
+                if ($targetBranch -like 'release*' -and $targetBranch -notlike '*preview*' -and $targetBranch -notlike '*rc*' -and $file -like '*PublicAPI.Unshipped.txt') {
                     $changedAPIBaselines.Add($file)
                 }
             }

src/Components/Components.slnf

@@ -46,23 +46,27 @@
       "src\\Components\\test\\E2ETestMigration\\Microsoft.AspNetCore.Components.Migration.E2ETests.csproj",
       "src\\Components\\test\\E2ETest\\Microsoft.AspNetCore.Components.E2ETests.csproj",
       "src\\Components\\test\\testassets\\BasicTestApp\\BasicTestApp.csproj",
+      "src\\Components\\test\\testassets\\ComponentsApp.App\\ComponentsApp.App.csproj",
       "src\\Components\\test\\testassets\\ComponentsApp.Server\\ComponentsApp.Server.csproj",
       "src\\Components\\test\\testassets\\GlobalizationWasmApp\\GlobalizationWasmApp.csproj",
+      "src\\Components\\test\\testassets\\LazyTestContentPackage\\LazyTestContentPackage.csproj",
       "src\\Components\\test\\testassets\\TestContentPackage\\TestContentPackage.csproj",
       "src\\Components\\test\\testassets\\TestServer\\Components.TestServer.csproj",
       "src\\DataProtection\\Abstractions\\src\\Microsoft.AspNetCore.DataProtection.Abstractions.csproj",
       "src\\DataProtection\\Cryptography.Internal\\src\\Microsoft.AspNetCore.Cryptography.Internal.csproj",
       "src\\DataProtection\\Cryptography.KeyDerivation\\src\\Microsoft.AspNetCore.Cryptography.KeyDerivation.csproj",
       "src\\DataProtection\\DataProtection\\src\\Microsoft.AspNetCore.DataProtection.csproj",
+      "src\\DataProtection\\Extensions\\src\\Microsoft.AspNetCore.DataProtection.Extensions.csproj",
       "src\\DefaultBuilder\\src\\Microsoft.AspNetCore.csproj",
+      "src\\Extensions\\Features\\src\\Microsoft.Extensions.Features.csproj",
       "src\\Features\\JsonPatch\\src\\Microsoft.AspNetCore.JsonPatch.csproj",
+      "src\\FileProviders\\Embedded\\src\\Microsoft.Extensions.FileProviders.Embedded.csproj",
       "src\\Hosting\\Abstractions\\src\\Microsoft.AspNetCore.Hosting.Abstractions.csproj",
       "src\\Hosting\\Hosting\\src\\Microsoft.AspNetCore.Hosting.csproj",
       "src\\Hosting\\Server.Abstractions\\src\\Microsoft.AspNetCore.Hosting.Server.Abstractions.csproj",
       "src\\Html.Abstractions\\src\\Microsoft.AspNetCore.Html.Abstractions.csproj",
       "src\\Http\\Authentication.Abstractions\\src\\Microsoft.AspNetCore.Authentication.Abstractions.csproj",
       "src\\Http\\Authentication.Core\\src\\Microsoft.AspNetCore.Authentication.Core.csproj",
-      "src\\Extensions\\Features\\src\\Microsoft.Extensions.Features.csproj",
       "src\\Http\\Headers\\src\\Microsoft.Net.Http.Headers.csproj",
       "src\\Http\\Http.Abstractions\\src\\Microsoft.AspNetCore.Http.Abstractions.csproj",
       "src\\Http\\Http.Extensions\\src\\Microsoft.AspNetCore.Http.Extensions.csproj",
@@ -79,6 +83,8 @@
       "src\\Identity\\Extensions.Stores\\src\\Microsoft.Extensions.Identity.Stores.csproj",
       "src\\Identity\\UI\\src\\Microsoft.AspNetCore.Identity.UI.csproj",
       "src\\JSInterop\\Microsoft.JSInterop\\src\\Microsoft.JSInterop.csproj",
+      "src\\Localization\\Abstractions\\src\\Microsoft.Extensions.Localization.Abstractions.csproj",
+      "src\\Localization\\Localization\\src\\Microsoft.Extensions.Localization.csproj",
       "src\\Middleware\\CORS\\src\\Microsoft.AspNetCore.Cors.csproj",
       "src\\Middleware\\Diagnostics.Abstractions\\src\\Microsoft.AspNetCore.Diagnostics.Abstractions.csproj",
       "src\\Middleware\\Diagnostics\\src\\Microsoft.AspNetCore.Diagnostics.csproj",
@@ -96,13 +102,15 @@
       "src\\Mvc\\Mvc.Core\\src\\Microsoft.AspNetCore.Mvc.Core.csproj",
       "src\\Mvc\\Mvc.Cors\\src\\Microsoft.AspNetCore.Mvc.Cors.csproj",
       "src\\Mvc\\Mvc.DataAnnotations\\src\\Microsoft.AspNetCore.Mvc.DataAnnotations.csproj",
+      "src\\Mvc\\Mvc.Formatters.Json\\src\\Microsoft.AspNetCore.Mvc.Formatters.Json.csproj",
       "src\\Mvc\\Mvc.Localization\\src\\Microsoft.AspNetCore.Mvc.Localization.csproj",
       "src\\Mvc\\Mvc.NewtonsoftJson\\src\\Microsoft.AspNetCore.Mvc.NewtonsoftJson.csproj",
       "src\\Mvc\\Mvc.RazorPages\\src\\Microsoft.AspNetCore.Mvc.RazorPages.csproj",
       "src\\Mvc\\Mvc.Razor\\src\\Microsoft.AspNetCore.Mvc.Razor.csproj",
       "src\\Mvc\\Mvc.TagHelpers\\src\\Microsoft.AspNetCore.Mvc.TagHelpers.csproj",
       "src\\Mvc\\Mvc.ViewFeatures\\src\\Microsoft.AspNetCore.Mvc.ViewFeatures.csproj",
       "src\\Mvc\\Mvc\\src\\Microsoft.AspNetCore.Mvc.csproj",
+      "src\\ObjectPool\\src\\Microsoft.Extensions.ObjectPool.csproj",
       "src\\Razor\\Razor.Runtime\\src\\Microsoft.AspNetCore.Razor.Runtime.csproj",
       "src\\Razor\\Razor\\src\\Microsoft.AspNetCore.Razor.csproj",
       "src\\Security\\Authentication\\Cookies\\src\\Microsoft.AspNetCore.Authentication.Cookies.csproj",
@@ -128,7 +136,8 @@
       "src\\SignalR\\common\\SignalR.Common\\src\\Microsoft.AspNetCore.SignalR.Common.csproj",
       "src\\SignalR\\server\\Core\\src\\Microsoft.AspNetCore.SignalR.Core.csproj",
       "src\\SignalR\\server\\SignalR\\src\\Microsoft.AspNetCore.SignalR.csproj",
-      "src\\Testing\\src\\Microsoft.AspNetCore.Testing.csproj"
+      "src\\Testing\\src\\Microsoft.AspNetCore.Testing.csproj",
+      "src\\WebEncoders\\src\\Microsoft.Extensions.WebEncoders.csproj"
     ]
   }
-}
+}

src/Components/Web/src/Forms/InputExtensions.cs

@@ -16,23 +16,61 @@ internal static class InputExtensions
         {
             try
             {
-                if (BindConverter.TryConvertTo<TValue>(value, CultureInfo.CurrentCulture, out var parsedValue))
+                // We special-case bool values because BindConverter reserves bool conversion for conditional attributes.
+                if (typeof(TValue) == typeof(bool))
+                {
+                    if (TryConvertToBool(value, out result))
+                    {
+                        validationErrorMessage = null;
+                        return true;
+                    }
+                }
+                else if (typeof(TValue) == typeof(bool?))
+                {
+                    if (TryConvertToNullableBool(value, out result))
+                    {
+                        validationErrorMessage = null;
+                        return true;
+                    }
+                }
+                else if (BindConverter.TryConvertTo<TValue>(value, CultureInfo.CurrentCulture, out var parsedValue))
                 {
                     result = parsedValue;
                     validationErrorMessage = null;
                     return true;
                 }
-                else
-                {
-                    result = default;
-                    validationErrorMessage = $"The {input.DisplayName ?? input.FieldIdentifier.FieldName} field is not valid.";
-                    return false;
-                }
+
+                result = default;
+                validationErrorMessage = $"The {input.DisplayName ?? input.FieldIdentifier.FieldName} field is not valid.";
+                return false;
             }
             catch (InvalidOperationException ex)
             {
                 throw new InvalidOperationException($"{input.GetType()} does not support the type '{typeof(TValue)}'.", ex);
             }
         }
+
+        private static bool TryConvertToBool<TValue>(string? value, out TValue result)
+        {
+            if (bool.TryParse(value, out var @bool))
+            {
+                result = (TValue)(object)@bool;
+                return true;
+            }
+
+            result = default!;
+            return false;
+        }
+
+        private static bool TryConvertToNullableBool<TValue>(string? value, out TValue result)
+        {
+            if (string.IsNullOrEmpty(value))
+            {
+                result = default!;
+                return true;
+            }
+
+            return TryConvertToBool(value, out result);
+        }
     }
 }

src/Components/Web/src/Forms/InputSelect.cs

@@ -64,6 +64,22 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         protected override bool TryParseValueFromString(string? value, [MaybeNullWhen(false)] out TValue result, [NotNullWhen(false)] out string? validationErrorMessage)
             => this.TryParseSelectableValueFromString(value, out result, out validationErrorMessage);
 
+        /// <inheritdoc />
+        protected override string? FormatValueAsString(TValue? value)
+        {
+            // We special-case bool values because BindConverter reserves bool conversion for conditional attributes.
+            if (typeof(TValue) == typeof(bool))
+            {
+                return (bool)(object)value! ? "true" : "false";
+            }
+            else if (typeof(TValue) == typeof(bool?))
+            {
+                return value is not null && (bool)(object)value ? "true" : "false";
+            }
+
+            return base.FormatValueAsString(value);
+        }
+
         private void SetCurrentValueAsStringArray(string?[]? value)
         {
             CurrentValue = BindConverter.TryConvertTo<TValue>(value, CultureInfo.CurrentCulture, out var result)

src/Components/Web/src/PublicAPI.Unshipped.txt

@@ -60,6 +60,7 @@ Microsoft.AspNetCore.Components.Web.PageTitle.ChildContent.set -> void
 Microsoft.AspNetCore.Components.Web.PageTitle.PageTitle() -> void
 override Microsoft.AspNetCore.Components.Forms.InputDate<TValue>.OnParametersSet() -> void
 abstract Microsoft.AspNetCore.Components.RenderTree.WebRenderer.AttachRootComponentToBrowser(int componentId, string! domElementSelector) -> void
+override Microsoft.AspNetCore.Components.Forms.InputSelect<TValue>.FormatValueAsString(TValue? value) -> string?
 override Microsoft.AspNetCore.Components.RenderTree.WebRenderer.Dispose(bool disposing) -> void
 override Microsoft.AspNetCore.Components.Routing.FocusOnNavigate.OnAfterRenderAsync(bool firstRender) -> System.Threading.Tasks.Task!
 override Microsoft.AspNetCore.Components.Routing.FocusOnNavigate.OnParametersSet() -> void

src/Components/test/E2ETest/Tests/FormsTest.cs

@@ -355,6 +355,34 @@ public void InputSelectInteractsWithEditContext()
             Browser.Equal(new[] { "The TicketClass field is not valid." }, messagesAccessor);
         }
 
+        [Fact]
+        public void InputSelectInteractsWithEditContext_BoolValues()
+        {
+            var appElement = MountTypicalValidationComponent();
+            var ticketClassInput = new SelectElement(appElement.FindElement(By.ClassName("select-bool-values")).FindElement(By.TagName("select")));
+            var select = ticketClassInput.WrappedElement;
+            var messagesAccessor = CreateValidationMessagesAccessor(appElement);
+
+            // Invalidates on edit
+            Browser.Equal("valid", () => select.GetAttribute("class"));
+            ticketClassInput.SelectByText("true");
+            Browser.Equal("modified invalid", () => select.GetAttribute("class"));
+            Browser.Equal(new[] { "77 + 33 = 100 is a false statement, unfortunately." }, messagesAccessor);
+
+            // Nullable conversion can fail
+            ticketClassInput.SelectByText("(select)");
+            Browser.Equal("modified invalid", () => select.GetAttribute("class"));
+            Browser.Equal(new[]
+            {
+                "77 + 33 = 100 is a false statement, unfortunately.",
+                "The IsSelectMathStatementTrue field is not valid."
+            }, messagesAccessor);
+
+            // Can become valid
+            ticketClassInput.SelectByText("false");
+            Browser.Equal("modified valid", () => select.GetAttribute("class"));
+        }
+
         [Fact]
         public void InputSelectInteractsWithEditContext_MultipleAttribute()
         {
@@ -521,6 +549,42 @@ public void InputRadioGroupsWithNamesNestedInteractWithEditContext()
             IReadOnlyCollection<IWebElement> FindColorInputs() => group.FindElements(By.Name("color"));
         }
 
+        [Fact]
+        public void InputRadioGroupWithBoolValuesInteractsWithEditContext()
+        {
+            var appElement = MountTypicalValidationComponent();
+            var messagesAccessor = CreateValidationMessagesAccessor(appElement);
+
+            // Validate selected inputs
+            Browser.False(() => FindTrueInput().Selected);
+            Browser.True(() => FindFalseInput().Selected);
+
+            // Validates on edit
+            Browser.Equal("valid", () => FindTrueInput().GetAttribute("class"));
+            Browser.Equal("valid", () => FindFalseInput().GetAttribute("class"));
+
+            FindTrueInput().Click();
+
+            Browser.Equal("modified valid", () => FindTrueInput().GetAttribute("class"));
+            Browser.Equal("modified valid", () => FindFalseInput().GetAttribute("class"));
+
+            // Can become invalid
+            FindFalseInput().Click();
+
+            Browser.Equal("modified invalid", () => FindTrueInput().GetAttribute("class"));
+            Browser.Equal("modified invalid", () => FindFalseInput().GetAttribute("class"));
+            Browser.Equal(new[] { "7 * 3 = 21 is a true statement." }, messagesAccessor);
+
+            IReadOnlyCollection<IWebElement> FindInputs()
+                => appElement.FindElement(By.ClassName("radio-group-bool-values")).FindElements(By.TagName("input"));
+
+            IWebElement FindTrueInput()
+                => FindInputs().First(i => string.Equals("True", i.GetAttribute("value")));
+
+            IWebElement FindFalseInput()
+                => FindInputs().First(i => string.Equals("False", i.GetAttribute("value")));
+        }
+
         [Fact]
         public void CanWireUpINotifyPropertyChangedToEditContext()
         {

src/Components/test/testassets/BasicTestApp/FormsTest/TypicalValidationComponent.razor

@@ -70,6 +70,14 @@
         </InputSelect>
         <span>@string.Join(", ", person.HostileStrings)</span>
     </p>
+    <p class="select-bool-values">
+        T/F: 77 + 33 = 100<br>
+        <InputSelect @bind-Value="person.IsSelectMathStatementTrue">
+            <option>(select)</option>
+            <option value="true">true</option>
+            <option value="false">false</option>
+        </InputSelect>
+    </p>
     <p class="airline">
         <InputRadioGroup @bind-Value="person.Airline">
             Airline:
@@ -96,6 +104,13 @@
             </InputRadioGroup>
         </InputRadioGroup>
     </p>
+    <p class="radio-group-bool-values">
+        T/F: 7 * 3 = 21<br>
+        <InputRadioGroup @bind-Value="person.IsRadioMathStatementTrue">
+            <InputRadio Value="true" />true<br>
+            <InputRadio Value="false" />false<br>
+        </InputRadioGroup>
+    </p>
     <p class="socks">
         Socks color: <InputText @bind-Value="person.SocksColor" />
     </p>
@@ -188,6 +203,12 @@
         [Required, EnumDataType(typeof(Country))]
         public Country? Country { get; set; } = null;
 
+        [Required, Range(typeof(bool), "false", "false", ErrorMessage = "77 + 33 = 100 is a false statement, unfortunately.")]
+        public bool? IsSelectMathStatementTrue { get; set; } = null;
+
+        [Required, Range(typeof(bool), "true", "true", ErrorMessage = "7 * 3 = 21 is a true statement.")]
+        public bool IsRadioMathStatementTrue { get; set; } = false;
+
         [Required, StringLength(10), CustomValidationClassName(Valid = "valid-socks", Invalid = "invalid-socks")]
         public string SocksColor { get; set; }
 

src/Http/Http.Abstractions/src/Metadata/IAcceptsMetadata.cs

@@ -0,0 +1,25 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+
+using System.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Http.Metadata
+{
+    /// <summary>
+    /// Interface for accepting request media types.
+    /// </summary>
+    public interface IAcceptsMetadata
+    {
+        /// <summary>
+        /// Gets a list of the allowed request content types.
+        /// If the incoming request does not have a <c>Content-Type</c> with one of these values, the request will be rejected with a 415 response.
+        /// </summary>
+        IReadOnlyList<string> ContentTypes { get; }
+
+        /// <summary>
+        /// Gets the type being read from the request. 
+        /// </summary>
+        Type? RequestType { get; }
+    }
+}

src/Http/Http.Abstractions/src/PublicAPI.Unshipped.txt

@@ -7,6 +7,9 @@
 *REMOVED*abstract Microsoft.AspNetCore.Http.HttpRequest.ContentType.get -> string!
 Microsoft.AspNetCore.Http.IResult
 Microsoft.AspNetCore.Http.IResult.ExecuteAsync(Microsoft.AspNetCore.Http.HttpContext! httpContext) -> System.Threading.Tasks.Task!
+Microsoft.AspNetCore.Http.Metadata.IAcceptsMetadata
+Microsoft.AspNetCore.Http.Metadata.IAcceptsMetadata.ContentTypes.get -> System.Collections.Generic.IReadOnlyList<string!>!
+Microsoft.AspNetCore.Http.Metadata.IAcceptsMetadata.RequestType.get -> System.Type?
 Microsoft.AspNetCore.Http.Metadata.IFromBodyMetadata
 Microsoft.AspNetCore.Http.Metadata.IFromBodyMetadata.AllowEmpty.get -> bool
 Microsoft.AspNetCore.Http.Metadata.IFromHeaderMetadata
@@ -18,6 +21,10 @@ Microsoft.AspNetCore.Http.Metadata.IFromRouteMetadata.Name.get -> string?
 Microsoft.AspNetCore.Http.Metadata.IFromServiceMetadata
 Microsoft.AspNetCore.Http.Endpoint.Endpoint(Microsoft.AspNetCore.Http.RequestDelegate? requestDelegate, Microsoft.AspNetCore.Http.EndpointMetadataCollection? metadata, string? displayName) -> void
 Microsoft.AspNetCore.Http.Endpoint.RequestDelegate.get -> Microsoft.AspNetCore.Http.RequestDelegate?
+Microsoft.AspNetCore.Http.RequestDelegateResult
+Microsoft.AspNetCore.Http.RequestDelegateResult.EndpointMetadata.get -> System.Collections.Generic.IReadOnlyList<object!>!
+Microsoft.AspNetCore.Http.RequestDelegateResult.RequestDelegate.get -> Microsoft.AspNetCore.Http.RequestDelegate!
+Microsoft.AspNetCore.Http.RequestDelegateResult.RequestDelegateResult(Microsoft.AspNetCore.Http.RequestDelegate! requestDelegate, System.Collections.Generic.IReadOnlyList<object!>! metadata) -> void
 Microsoft.AspNetCore.Routing.RouteValueDictionary.TryAdd(string! key, object? value) -> bool
 static readonly Microsoft.AspNetCore.Http.HttpProtocol.Http09 -> string!
 static Microsoft.AspNetCore.Http.HttpProtocol.IsHttp09(string! protocol) -> bool

src/Http/Http.Abstractions/src/RequestDelegateResult.cs

@@ -0,0 +1,33 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Threading.Tasks;
+
+namespace Microsoft.AspNetCore.Http
+{
+    /// <summary>
+    /// The result of creating a <see cref="RequestDelegate" /> from a <see cref="Delegate" />
+    /// </summary>
+    public sealed class RequestDelegateResult
+    {
+        /// <summary>
+        /// Creates a new instance of <see cref="RequestDelegateResult"/>.
+        /// </summary>
+        public RequestDelegateResult(RequestDelegate requestDelegate, IReadOnlyList<object> metadata)
+        {
+            RequestDelegate = requestDelegate;
+            EndpointMetadata = metadata;
+        }
+
+        /// <summary>
+        /// Gets the <see cref="RequestDelegate" />
+        /// </summary>
+        public RequestDelegate RequestDelegate { get;}
+
+        /// <summary>
+        /// Gets endpoint metadata inferred from creating the <see cref="RequestDelegate" />
+        /// </summary>
+        public IReadOnlyList<object> EndpointMetadata { get;}
+    }
+
+}

src/Http/Http.Extensions/src/Microsoft.AspNetCore.Http.Extensions.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <Description>ASP.NET Core common extension methods for HTTP abstractions, HTTP headers, HTTP request/response, and session state.</Description>
@@ -16,6 +16,7 @@
     <Compile Include="..\..\Shared\StreamCopyOperationInternal.cs" LinkBase="Shared" />
     <Compile Include="$(SharedSourceRoot)ProblemDetailsJsonConverter.cs" LinkBase="Shared"/>
     <Compile Include="$(SharedSourceRoot)HttpValidationProblemDetailsJsonConverter.cs" LinkBase="Shared" />
+    <Compile Include="$(SharedSourceRoot)RoutingMetadata\AcceptsMetadata.cs" LinkBase="Shared" />
   </ItemGroup>
 
   <ItemGroup>