Add an initial generic client.

Author: brendandburns

examples/generic/Generic.cs

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+using System;
+using System.Threading.Tasks;
+using k8s;
+using k8s.Models;
+
+namespace exec
+{
+    internal class Generic
+    {
+        private static async Task Main(string[] args)
+        {
+            var config = KubernetesClientConfiguration.BuildConfigFromConfigFile();
+            var generic = new GenericClient(config, "", "v1", "nodes");
+            Console.WriteLine(await generic.ReadAsync("kube0").ConfigureAwait(false));
+
+            var genericPods = new GenericClient(config, "", "v1", "pods");
+            Console.WriteLine(await genericPods.ListNamespacedAsync("default").ConfigureAwait(false));
+        }
+    }
+}

examples/generic/generic.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\KubernetesClient\KubernetesClient.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5</TargetFramework>
+    <LangVersion>7.1</LangVersion>
+  </PropertyGroup>
+
+</Project>

src/KubernetesClient/GenericClient.cs

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+using System;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace k8s
+{
+    public class GenericClient : IDisposable
+    {
+        internal class TweakApiHandler : DelegatingHandler
+        {
+            protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage msg, CancellationToken cancel)
+            {
+                msg.RequestUri = new Uri(msg.RequestUri, msg.RequestUri.AbsolutePath.Replace("/apis//", "/api/"));
+                return base.SendAsync(msg, cancel);
+            }
+        }
+
+        private IKubernetes kubernetes;
+        private string group;
+        private string version;
+        private string plural;
+
+
+        public GenericClient(KubernetesClientConfiguration config, string group, string version, string plural)
+        {
+            this.group = group;
+            this.version = version;
+            this.plural = plural;
+
+            if (string.IsNullOrEmpty(group))
+            {
+                this.kubernetes = new Kubernetes(config, new DelegatingHandler[] { new TweakApiHandler() });
+            }
+            else
+            {
+                this.kubernetes = new Kubernetes(config);
+            }
+        }
+
+        public async Task<string> ListAsync(CancellationToken cancel = default(CancellationToken))
+        {
+            var resp = await this.kubernetes.ListClusterCustomObjectWithHttpMessagesAsync(this.group, this.version, this.plural, cancellationToken: cancel).ConfigureAwait(false);
+            return resp.Body.ToString();
+        }
+
+        public async Task<string> ListNamespacedAsync(string ns, CancellationToken cancel = default(CancellationToken))
+        {
+            var resp = await this.kubernetes.ListNamespacedCustomObjectWithHttpMessagesAsync(this.group, this.version, ns, this.plural, cancellationToken: cancel).ConfigureAwait(false);
+            return resp.Body.ToString();
+        }
+
+        public async Task<string> ReadNamespacedAsync(string ns, string name, CancellationToken cancel = default(CancellationToken))
+        {
+            var resp = await this.kubernetes.GetNamespacedCustomObjectWithHttpMessagesAsync(this.group, this.version, ns, this.plural, name, cancellationToken: cancel).ConfigureAwait(false);
+            return resp.Body.ToString();
+        }
+
+        public async Task<string> ReadAsync(string name, CancellationToken cancel = default(CancellationToken))
+        {
+            var resp = await this.kubernetes.GetClusterCustomObjectWithHttpMessagesAsync(this.group, this.version, this.plural, name, cancellationToken: cancel).ConfigureAwait(false);
+            return resp.Body.ToString();
+        }
+
+        public async Task<string> DeleteAsync(string name, CancellationToken cancel = default(CancellationToken))
+        {
+            var resp = await this.kubernetes.DeleteClusterCustomObjectWithHttpMessagesAsync(this.group, this.version, this.plural, name, cancellationToken: cancel).ConfigureAwait(false);
+            return resp.Body.ToString();
+        }
+
+        public async Task<string> DeleteNamespacedAsync(string ns, string name, CancellationToken cancel = default(CancellationToken))
+        {
+            var resp = await this.kubernetes.DeleteNamespacedCustomObjectWithHttpMessagesAsync(this.group, this.version, ns, this.plural, name, cancellationToken: cancel).ConfigureAwait(false);
+            return resp.Body.ToString();
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            this.kubernetes.Dispose();
+        }
+    }
+}