Dedup code

src/GitHub.App/Services/EnterpriseProbe.cs

@@ -1,52 +1,25 @@
 using System;
 using System.ComponentModel.Composition;
-using System.Net.Http;
 using GitHub.Models;
-using Octokit;
 using Octokit.Internal;
 using System.Reactive.Linq;
-using System.Threading;
 using System.Reactive.Threading.Tasks;
-using System.Net;
-using System.Threading.Tasks;
 
 namespace GitHub.Services
 {
     [Export(typeof(IEnterpriseProbe))]
     [PartCreationPolicy(CreationPolicy.Shared)]
-    public class EnterpriseProbe : IEnterpriseProbe
+    public class EnterpriseProbe : EnterpriseProbeTask, IEnterpriseProbe
     {
-        static readonly Uri endPoint = new Uri("/site/sha", UriKind.Relative);
-        readonly ProductHeaderValue productHeader;
-        readonly IHttpClient httpClient;
-
         [ImportingConstructor]
         public EnterpriseProbe(IProgram program, IHttpClient httpClient)
+            : base(program, httpClient)
         {
-            productHeader = program.ProductHeader;
-            this.httpClient = httpClient;
         }
 
         public IObservable<EnterpriseProbeResult> Probe(Uri enterpriseBaseUrl)
         {
-            var request = new Request
-            {
-                Method = HttpMethod.Get,
-                BaseAddress = enterpriseBaseUrl,
-                Endpoint = endPoint,
-                Timeout = TimeSpan.FromSeconds(3),
-                AllowAutoRedirect = false,
-            };
-            request.Headers.Add("User-Agent", productHeader.ToString());
-
-            return httpClient.Send<object>(request, CancellationToken.None)
-                .ToObservable()
-                .Catch(Observable.Return<IResponse<object>>(null))
-                .Select(resp => resp == null
-                    ? EnterpriseProbeResult.Failed
-                    : (resp.StatusCode == HttpStatusCode.OK
-                        ? EnterpriseProbeResult.Ok
-                        : EnterpriseProbeResult.NotFound));
+            return ProbeAsync(enterpriseBaseUrl).ToObservable();
         }
     }
 }

src/GitHub.Exports/Services/EnterpriseProbe.cs

@@ -13,14 +13,14 @@ namespace GitHub.Services
 {
     [Export(typeof(IEnterpriseProbeTask))]
     [PartCreationPolicy(CreationPolicy.Shared)]
-    public class EnterpriseProbe : IEnterpriseProbeTask
+    public class EnterpriseProbeTask : IEnterpriseProbeTask
     {
         static readonly Uri endPoint = new Uri("/site/sha", UriKind.Relative);
         readonly ProductHeaderValue productHeader;
         readonly IHttpClient httpClient;
 
         [ImportingConstructor]
-        public EnterpriseProbe(IProgram program, IHttpClient httpClient)
+        public EnterpriseProbeTask(IProgram program, IHttpClient httpClient)
         {
             productHeader = program.ProductHeader;
             this.httpClient = httpClient;