ConsumesAttribute accepts requests without content type

Fixes #8174

src/Microsoft.AspNetCore.Mvc.Core/ConsumesAttribute.cs

@@ -10,8 +10,6 @@ using Microsoft.AspNetCore.Mvc.ApiExplorer;
 using Microsoft.AspNetCore.Mvc.Filters;
 using Microsoft.AspNetCore.Mvc.Formatters;
 using Microsoft.AspNetCore.Mvc.Internal;
-using Microsoft.AspNetCore.Mvc.Routing;
-using Microsoft.AspNetCore.Routing;
 using Microsoft.Net.Http.Headers;
 using Resources = Microsoft.AspNetCore.Mvc.Core.Resources;
 
@@ -79,7 +77,7 @@ namespace Microsoft.AspNetCore.Mvc
 
                 // Confirm the request's content type is more specific than a media type this action supports e.g. OK
                 // if client sent "text/plain" data and this action supports "text/*".
-                if (requestContentType != null && !IsSubsetOfAnyContentType(requestContentType))
+                if (requestContentType == null || !IsSubsetOfAnyContentType(requestContentType))
                 {
                     context.Result = new UnsupportedMediaTypeResult();
                 }

test/Microsoft.AspNetCore.Mvc.Core.Test/ConsumesAttributeTests.cs

@@ -326,7 +326,7 @@ namespace Microsoft.AspNetCore.Mvc
         [Theory]
         [InlineData("")]
         [InlineData(null)]
-        public void OnResourceExecuting_NullOrEmptyRequestContentType_IsNoOp(string contentType)
+        public void OnResourceExecuting_NullOrEmptyRequestContentType_SetsUnsupportedMediaTypeResult(string contentType)
         {
             // Arrange
             var httpContext = new DefaultHttpContext();
@@ -349,7 +349,8 @@ namespace Microsoft.AspNetCore.Mvc
             consumesFilter.OnResourceExecuting(resourceExecutingContext);
 
             // Assert
-            Assert.Null(resourceExecutingContext.Result);
+            Assert.NotNull(resourceExecutingContext.Result);
+            Assert.IsType<UnsupportedMediaTypeResult>(resourceExecutingContext.Result);
         }
 
         [Theory]

test/Microsoft.AspNetCore.Mvc.FunctionalTests/ConsumesAttributeEndpointRoutingTests.cs

@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System.Net;
-using System.Net.Http;
 using System.Threading.Tasks;
 using Newtonsoft.Json;
 using Xunit;
@@ -30,22 +29,5 @@ namespace Microsoft.AspNetCore.Mvc.FunctionalTests
 
             Assert.True(result);
         }
-
-        // The endpoint routing version of this feature has fixed https://github.com/aspnet/Mvc/issues/8174
-        [Fact]
-        public override async Task NoRequestContentType_Selects_IfASingleActionWithConstraintIsPresent()
-        {
-            // Arrange
-            var request = new HttpRequestMessage(
-                HttpMethod.Post,
-                "http://localhost/ConsumesAttribute_PassThrough/CreateProduct");
-
-            // Act
-            var response = await Client.SendAsync(request);
-            var body = await response.Content.ReadAsStringAsync();
-
-            // Assert
-            Assert.Equal(HttpStatusCode.UnsupportedMediaType, response.StatusCode);
-        }
     }
 }

test/Microsoft.AspNetCore.Mvc.FunctionalTests/ConsumesAttributeTestsBase.cs

@@ -49,7 +49,7 @@ namespace Microsoft.AspNetCore.Mvc.FunctionalTests
         }
 
         [Fact]
-        public virtual async Task NoRequestContentType_Selects_IfASingleActionWithConstraintIsPresent()
+        public async Task NoRequestContentType_Selects_IfASingleActionWithConstraintIsPresent_ReturnsUnsupported()
         {
             // Arrange
             var request = new HttpRequestMessage(
@@ -58,11 +58,7 @@ namespace Microsoft.AspNetCore.Mvc.FunctionalTests
 
             // Act
             var response = await Client.SendAsync(request);
-            var body = await response.Content.ReadAsStringAsync();
+            await response.AssertStatusCodeAsync(HttpStatusCode.UnsupportedMediaType);
-
-            // Assert
-            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
-            Assert.Equal("ConsumesAttribute_PassThrough_Product_Json", body);
         }
 
         [Theory]