Kubernetes.Classic: add support for netstandard2.0 and net48 (#808)

* support gh nuget (#11)

* trim to fit net48

* add net48 support

* add very test framework

* add test body

* Revert "support gh nuget (#11)"

This reverts commit 5cdaf59690170be44e4554485fb2e89785a6a1cf.

kubernetes-client.sln

@@ -51,7 +51,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "yaml", "examples\yaml\yaml.
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "KubernetesClient.Models", "src\KubernetesClient.Models\KubernetesClient.Models.csproj", "{F066A4D8-2EF0-4C07-AC0D-BD325DE3FFA8}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "KubernetesClient.Basic", "src\KubernetesClient.Basic\KubernetesClient.Basic.csproj", "{927995F5-05CC-4078-8805-8E6CC06914D8}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "KubernetesClient.Basic", "src\KubernetesClient.Basic\KubernetesClient.Basic.csproj", "{927995F5-05CC-4078-8805-8E6CC06914D8}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "KubernetesClient.Classic", "src\KubernetesClient.Classic\KubernetesClient.Classic.csproj", "{80F19E8A-F097-4AA4-A68C-D417B96BBC68}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "KubernetesClient.Classic.Tests", "tests\KubernetesClient.Classic.Tests\KubernetesClient.Classic.Tests.csproj", "{FD90C861-56C6-4536-B7F5-AC7779296384}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "csrApproval", "examples\csrApproval\csrApproval.csproj", "{F626860C-F141-45B3-9DDD-88AD3932ACAF}"
 EndProject
@@ -329,6 +333,30 @@ Global
 		{927995F5-05CC-4078-8805-8E6CC06914D8}.Release|x64.Build.0 = Release|Any CPU
 		{927995F5-05CC-4078-8805-8E6CC06914D8}.Release|x86.ActiveCfg = Release|Any CPU
 		{927995F5-05CC-4078-8805-8E6CC06914D8}.Release|x86.Build.0 = Release|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Debug|x64.Build.0 = Debug|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Debug|x86.Build.0 = Debug|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Release|Any CPU.Build.0 = Release|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Release|x64.ActiveCfg = Release|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Release|x64.Build.0 = Release|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Release|x86.ActiveCfg = Release|Any CPU
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68}.Release|x86.Build.0 = Release|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Debug|x64.Build.0 = Debug|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Debug|x86.Build.0 = Debug|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Release|x64.ActiveCfg = Release|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Release|x64.Build.0 = Release|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Release|x86.ActiveCfg = Release|Any CPU
+		{FD90C861-56C6-4536-B7F5-AC7779296384}.Release|x86.Build.0 = Release|Any CPU
 		{F626860C-F141-45B3-9DDD-88AD3932ACAF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{F626860C-F141-45B3-9DDD-88AD3932ACAF}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{F626860C-F141-45B3-9DDD-88AD3932ACAF}.Debug|x64.ActiveCfg = Debug|Any CPU
@@ -368,6 +396,8 @@ Global
 		{17AB0AD8-6C90-42DD-880C-16B5AC4A373F} = {B70AFB57-57C9-46DC-84BE-11B7DDD34B40}
 		{F066A4D8-2EF0-4C07-AC0D-BD325DE3FFA8} = {3D1864AA-1FFC-4512-BB13-46055E410F73}
 		{927995F5-05CC-4078-8805-8E6CC06914D8} = {3D1864AA-1FFC-4512-BB13-46055E410F73}
+		{80F19E8A-F097-4AA4-A68C-D417B96BBC68} = {3D1864AA-1FFC-4512-BB13-46055E410F73}
+		{FD90C861-56C6-4536-B7F5-AC7779296384} = {8AF4A5C2-F0CE-47D5-A4C5-FE4AB83CA509}
 		{F626860C-F141-45B3-9DDD-88AD3932ACAF} = {B70AFB57-57C9-46DC-84BE-11B7DDD34B40}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution

src/KubernetesClient.Classic/Global.cs

@@ -0,0 +1,4 @@
+global using System;
+global using System.Collections.Generic;
+global using System.Linq;
+global using System.Text.Json;

src/KubernetesClient.Classic/KubernetesClient.Classic.csproj

@@ -0,0 +1,43 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>netstandard2.0;net48</TargetFrameworks>
+    <RootNamespace>k8s</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Portable.BouncyCastle" Version="1.8.10" />
+    <PackageReference Include="System.IO.Abstractions" Version="13.2.47" />
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.13.1" />
+    <PackageReference Include="IdentityModel.OidcClient" Version="4.0.0" />
+  </ItemGroup>
+    
+  <ItemGroup>
+    <ProjectReference Include="..\KubernetesClient.Models\KubernetesClient.Models.csproj" />
+    <ProjectReference Include="..\KubernetesClient.Basic\KubernetesClient.Basic.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Include="..\KubernetesClient\CertUtils.cs" />
+    <Compile Include="..\KubernetesClient\FileUtils.cs" />
+    <Compile Include="..\KubernetesClient\IKubernetes.cs" />
+    <Compile Include="..\KubernetesClient\Kubernetes.ConfigInit.cs" />
+    <Compile Include="..\KubernetesClient\Kubernetes.cs" />
+    <Compile Include="..\KubernetesClient\KubernetesClientConfiguration.ConfigFile.cs" />
+    <Compile Include="..\KubernetesClient\KubernetesClientConfiguration.InCluster.cs" />
+    <Compile Include="..\KubernetesClient\KubernetesClientConfiguration.cs" />
+    <Compile Include="..\KubernetesClient\KubernetesException.cs" />
+
+    <Compile Include="..\KubernetesClient\Exceptions\KubeConfigException.cs" />
+    <Compile Include="..\KubernetesClient\Exceptions\KubernetesClientException.cs" />
+
+    <Compile Include="..\KubernetesClient\Authentication\ExecTokenProvider.cs" />
+    <Compile Include="..\KubernetesClient\Authentication\GcpTokenProvider.cs" />
+    <Compile Include="..\KubernetesClient\Authentication\OidcTokenProvider.cs" />
+    <Compile Include="..\KubernetesClient\Authentication\TokenFileAuth.cs" />
+  </ItemGroup>
+    
+  <ItemGroup>
+    <Reference Include="System.Net.Http" Condition="'$(TargetFramework)' == 'net48'" />
+  </ItemGroup>
+</Project>

src/KubernetesClient/Authentication/TokenFileAuth.cs

@@ -17,13 +17,21 @@ namespace k8s.Authentication
             TokenFile = tokenFile;
         }
 
+#if NETSTANDARD2_1_OR_GREATER
         public async Task<AuthenticationHeaderValue> GetAuthenticationHeaderAsync(CancellationToken cancellationToken)
+#else
+        public Task<AuthenticationHeaderValue> GetAuthenticationHeaderAsync(CancellationToken cancellationToken)
+#endif
         {
             if (TokenExpiresAt < DateTime.UtcNow)
             {
+#if NETSTANDARD2_1_OR_GREATER
                 token = await File.ReadAllTextAsync(TokenFile, cancellationToken)
                     .ContinueWith(r => r.Result.Trim(), cancellationToken)
                     .ConfigureAwait(false);
+#else
+                token = File.ReadAllText(TokenFile).Trim();
+#endif
                 // in fact, the token has a expiry of 10 minutes and kubelet
                 // refreshes it at 8 minutes of its lifetime. setting the expiry
                 // of 1 minute makes sure the token is reloaded regularly so
@@ -32,8 +40,11 @@ namespace k8s.Authentication
                 // < 10-8-1 minute.
                 TokenExpiresAt = DateTime.UtcNow.AddMinutes(1);
             }
-
+#if NETSTANDARD2_1_OR_GREATER
             return new AuthenticationHeaderValue("Bearer", token);
+#else
+            return Task.FromResult(new AuthenticationHeaderValue("Bearer", token));
+#endif
         }
     }
 }

src/KubernetesClient/Kubernetes.ConfigInit.cs

@@ -23,7 +23,9 @@ namespace k8s
             Initialize();
             ValidateConfig(config);
             CaCerts = config.SslCaCerts;
+#if NETSTANDARD2_1_OR_GREATER || NET5_0_OR_GREATER
             SkipTlsVerify = config.SkipTlsVerify;
+#endif
             CreateHttpClient(handlers, config);
             InitializeFromConfig(config);
             HttpClientTimeout = config.HttpClientTimeout;
@@ -100,9 +102,11 @@ namespace k8s
 
         private X509Certificate2Collection CaCerts { get; }
 
+#if NETSTANDARD2_1_OR_GREATER || NET5_0_OR_GREATER
         private X509Certificate2 ClientCert { get; }
 
         private bool SkipTlsVerify { get; }
+#endif
 
         // NOTE: this method replicates the logic that the base ServiceClient uses except that it doesn't insert the RetryDelegatingHandler
         // and it does insert the WatcherDelegatingHandler. we don't want the RetryDelegatingHandler because it has a very broad definition

src/KubernetesClient/Kubernetes.cs

@@ -71,7 +71,11 @@ namespace k8s
 
             if (watch == true)
             {
+#if NETSTANDARD2_0 || NET48
+                throw new KubernetesException("watch not supported");
+#else
                 httpResponse.Content = new LineSeparatedHttpContent(httpResponse.Content, cancellationToken);
+#endif
             }
 
             try
@@ -100,7 +104,9 @@ namespace k8s
             var httpRequest = new HttpRequestMessage();
             httpRequest.Method = new HttpMethod(method);
             httpRequest.RequestUri = new Uri(BaseUri, relativeUri);
+#if NETSTANDARD2_1_OR_GREATER
             httpRequest.Version = HttpVersion.Version20;
+#endif
             // Set Headers
             if (customHeaders != null)
             {

src/nuget.proj

@@ -3,5 +3,6 @@
     <ProjectReference Include="KubernetesClient.Models/KubernetesClient.Models.csproj" />
     <ProjectReference Include="KubernetesClient.Basic/KubernetesClient.Basic.csproj" />
     <ProjectReference Include="KubernetesClient/KubernetesClient.csproj" />
+    <ProjectReference Include="KubernetesClient.Classic/KubernetesClient.Classic.csproj" />
   </ItemGroup>
 </Project>

tests/KubernetesClient.Classic.Tests/KubernetesClient.Classic.Tests.csproj

@@ -0,0 +1,42 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <IsPackable>false</IsPackable>
+    <RootNamespace>k8s.Tests</RootNamespace>
+    <TargetFramework Condition="'$(OS)' != 'Windows_NT'">net6</TargetFramework>
+    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">net6;net48</TargetFrameworks>
+  </PropertyGroup>
+
+  <ItemGroup>
+      <PackageReference Include="MartinCostello.Logging.XUnit" Version="0.2.0" />
+      <PackageReference Include="FluentAssertions" Version="6.1.0" />
+      <PackageReference Include="Microsoft.Extensions.Logging" Version="6.0.0" />
+      <PackageReference Include="System.IO.Abstractions.TestingHelpers" Version="13.2.47" />
+      <PackageReference Include="System.Reactive" Version="5.0.0" />
+      <PackageReference Include="Nito.AsyncEx" Version="5.1.2" />
+      <PackageReference Include="Portable.BouncyCastle" Version="1.8.10" />
+      <PackageReference Include="AutoMapper" Version="10.1.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+
+    <PackageReference Include="coverlet.msbuild" Version="3.1.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+    </PackageReference>
+
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Xunit.StaFact" Version="1.0.37" />
+    <PackageReference Include="Moq" Version="4.16.1" />
+
+    <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\KubernetesClient.Classic\KubernetesClient.Classic.csproj" />
+  </ItemGroup>
+</Project>

tests/KubernetesClient.Classic.Tests/SimpleTests.cs

@@ -0,0 +1,81 @@
+using System.IO;
+using System.Net;
+using System.Net.Sockets;
+using System.Threading.Tasks;
+using Xunit;
+using k8s.Models;
+
+namespace k8s.tests;
+
+public class BasicTests
+{
+    // TODO: fail to setup asp.net core 6 on net48
+    private class DummyHttpServer : System.IDisposable
+    {
+        private TcpListener server;
+        private readonly Task loop;
+        private volatile bool running = false;
+
+        public string Addr => $"http://{server.LocalEndpoint}";
+
+        public DummyHttpServer(object obj)
+        {
+            server = new TcpListener(IPAddress.Parse("127.0.0.1"), 0);
+            server.Start();
+            running = true;
+            loop = Task.Run(async () =>
+            {
+                while (running)
+                {
+                    var result = KubernetesJson.Serialize(obj);
+
+                    var client = await server.AcceptTcpClientAsync().ConfigureAwait(false);
+                    var stream = client.GetStream();
+                    stream.Read(new byte[1024], 0, 1024); // TODO ensure full header
+
+                    var writer = new StreamWriter(stream);
+                    await writer.WriteLineAsync("HTTP/1.0 200 OK").ConfigureAwait(false);
+                    await writer.WriteLineAsync("Content-Length: " + result.Length).ConfigureAwait(false);
+                    await writer.WriteLineAsync("Content-Type: application/json").ConfigureAwait(false);
+                    await writer.WriteLineAsync().ConfigureAwait(false);
+                    await writer.WriteLineAsync(result).ConfigureAwait(false);
+
+                    await writer.FlushAsync().ConfigureAwait(false);
+                    client.Close();
+                }
+            });
+        }
+
+        public void Dispose()
+        {
+            try
+            {
+                running = false;
+                server.Stop();
+                loop.Wait();
+                loop.Dispose();
+            }
+            catch
+            {
+                // ignore
+            }
+        }
+    }
+
+    [Fact]
+    public async Task QueryPods()
+    {
+        using var server = new DummyHttpServer(new V1Pod()
+        {
+            Metadata = new V1ObjectMeta()
+            {
+                Name = "pod0",
+            },
+        });
+        var client = new Kubernetes(new KubernetesClientConfiguration { Host = server.Addr });
+
+        var pod = await client.ReadNamespacedPodAsync("pod", "default").ConfigureAwait(false);
+
+        Assert.Equal("pod0", pod.Metadata.Name);
+    }
+}

tests/KubernetesClient.Tests/KubernetesClient.Tests.csproj

@@ -1,8 +1,6 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk.Web">
   <PropertyGroup>
     <IsPackable>false</IsPackable>
-    <LangVersion>8</LangVersion>
-    <SignAssembly>true</SignAssembly>
     <RootNamespace>k8s.Tests</RootNamespace>
     <TargetFrameworks>netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>