Change middleware projects to target netcoreapp3.0

src/Middleware/HostFiltering/src/Microsoft.AspNetCore.HostFiltering.csproj

@@ -4,7 +4,7 @@
     <Description>
       ASP.NET Core middleware for filtering out requests with unknown HTTP host headers.
     </Description>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore</PackageTags>
   </PropertyGroup>

src/Middleware/HttpOverrides/src/Microsoft.AspNetCore.HttpOverrides.csproj

@@ -4,7 +4,7 @@
     <Description>ASP.NET Core basic middleware for supporting HTTP method overrides. Includes:
 * X-Forwarded-* headers to forward headers from a proxy.
 * HTTP method override header.</Description>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;proxy;headers;xforwarded</PackageTags>

src/Middleware/HttpsPolicy/src/Microsoft.AspNetCore.HttpsPolicy.csproj

@@ -4,7 +4,7 @@
     <Description>
       ASP.NET Core basic middleware for supporting HTTPS Redirection and HTTP Strict-Transport-Security.
     </Description>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;https;hsts</PackageTags>

src/Middleware/ResponseCompression/src/BrotliCompressionProvider.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// 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 System;
@@ -38,14 +38,7 @@ public BrotliCompressionProvider(IOptions<BrotliCompressionProviderOptions> opti
         /// <inheritdoc />
         public Stream CreateStream(Stream outputStream)
         {
-#if NETCOREAPP2_1
             return new BrotliStream(outputStream, Options.Level, leaveOpen: true);
-#elif NET461 || NETSTANDARD2_0
-            // Brotli is only supported in .NET Core 2.1+
-            throw new PlatformNotSupportedException();
-#else
-#error Target frameworks need to be updated.
-#endif
         }
     }
 }

src/Middleware/ResponseCompression/src/GzipCompressionProvider.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// 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 System;
@@ -33,19 +33,7 @@ public GzipCompressionProvider(IOptions<GzipCompressionProviderOptions> options)
         public string EncodingName { get; } = "gzip";
 
         /// <inheritdoc />
-        public bool SupportsFlush
-        {
-            get
-            {
-#if NET461
-                return false;
-#elif NETSTANDARD2_0 || NETCOREAPP2_1
-                return true;
-#else
-#error target frameworks need to be updated
-#endif
-            }
-        }
+        public bool SupportsFlush => true;
 
         /// <inheritdoc />
         public Stream CreateStream(Stream outputStream)

src/Middleware/ResponseCompression/src/Microsoft.AspNetCore.ResponseCompression.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core middleware for HTTP Response compression.</Description>
-    <TargetFrameworks>net461;netstandard2.0;netcoreapp2.1</TargetFrameworks>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore</PackageTags>
   </PropertyGroup>

src/Middleware/ResponseCompression/src/ResponseCompressionProvider.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// 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 System;
@@ -48,13 +48,7 @@ public ResponseCompressionProvider(IServiceProvider services, IOptions<ResponseC
                 // Use the factory so it can resolve IOptions<GzipCompressionProviderOptions> from DI.
                 _providers = new ICompressionProvider[]
                 {
-#if NETCOREAPP2_1
                     new CompressionProviderFactory(typeof(BrotliCompressionProvider)),
-#elif NET461 || NETSTANDARD2_0
-                    // Brotli is only supported in .NET Core 2.1+
-#else
-#error Target frameworks need to be updated.
-#endif
                     new CompressionProviderFactory(typeof(GzipCompressionProvider)),
                 };
             }

src/Middleware/Rewrite/src/Microsoft.AspNetCore.Rewrite.csproj

@@ -5,7 +5,7 @@
 * Support for custom URL rewrite rules
 * Support for running IIS URL Rewrite module rules
 * Support for running Apache mod_rewrite rules.</Description>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;urlrewrite;mod_rewrite</PackageTags>