Moving httpcontextfactory to AspNet.Http.Abstractions

Author: JunTaoLuo

src/Microsoft.AspNet.Http.Abstractions/IHttpContextFactory.cs

@@ -0,0 +1,13 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using Microsoft.AspNet.Http.Features;
+
+namespace Microsoft.AspNet.Http
+{
+    public interface IHttpContextFactory
+    {
+        HttpContext CreateHttpContext(IFeatureCollection featureCollection);
+        void Dispose(HttpContext httpContext);
+    }
+}

src/Microsoft.AspNet.Http/HttpContextFactory.cs

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+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using Microsoft.AspNet.Http.Features;
+
+namespace Microsoft.AspNet.Http.Internal
+{
+    public class HttpContextFactory : IHttpContextFactory
+    {
+        private IHttpContextAccessor _httpContextAccessor;
+
+        public HttpContextFactory(IHttpContextAccessor httpContextAccessor)
+        {
+            _httpContextAccessor = httpContextAccessor;
+        }
+
+        public HttpContext CreateHttpContext(IFeatureCollection featureCollection)
+        {
+            var httpContext = new DefaultHttpContext(featureCollection);
+            _httpContextAccessor.HttpContext = httpContext;
+            return httpContext;
+        }
+
+        public void Dispose(HttpContext httpContext)
+        {
+            _httpContextAccessor.HttpContext = null;
+        }
+    }
+}

test/Microsoft.AspNet.Http.Tests/HttpContextFactoryTests.cs

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+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using Microsoft.AspNet.Http.Features;
+using Xunit;
+
+namespace Microsoft.AspNet.Http.Internal
+{
+    public class HttpContextFactoryTests
+    {
+        [Fact]
+        public void CreateHttpContextSetsHttpContextAccessor()
+        {
+            // Arrange
+            var accessor = new HttpContextAccessor();
+            var contextFactory = new HttpContextFactory(accessor);
+
+            // Act
+            var context = contextFactory.CreateHttpContext(new FeatureCollection());
+
+            // Assert
+            Assert.True(ReferenceEquals(context, accessor.HttpContext));
+        }
+    }
+}