Use RawHttpMessageHandler and VssHttpRetryMessageHandler in ResultsHt…

…tpClient (#2908)

* Set an explicit timeout on ResultsHttpClient

* Hook up retry and standard message handler to ResultsHttpClient

* Remove explicit timeout constructor

* Fix linter

src/Runner.Common/ResultsServer.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Net.WebSockets;
 using System.Security;
@@ -52,8 +53,8 @@ public sealed class ResultServer : RunnerService, IResultsServer
 
         public void InitializeResultsClient(Uri uri, string liveConsoleFeedUrl, string token)
         {
-            var httpMessageHandler = HostContext.CreateHttpClientHandler();
-            this._resultsClient = new ResultsHttpClient(uri, httpMessageHandler, token, disposeHandler: true);
+            this._resultsClient = CreateHttpClient(uri, token);
+
             _token = token;
             if (!string.IsNullOrEmpty(liveConsoleFeedUrl))
             {
@@ -62,6 +63,26 @@ public void InitializeResultsClient(Uri uri, string liveConsoleFeedUrl, string t
             }
         }
 
+        public ResultsHttpClient CreateHttpClient(Uri uri, string token)
+        {
+            // Using default 100 timeout
+            RawClientHttpRequestSettings settings = VssUtil.GetHttpRequestSettings(null);
+
+            // Create retry handler
+            IEnumerable<DelegatingHandler> delegatingHandlers = new List<DelegatingHandler>();
+            if (settings.MaxRetryRequest > 0)
+            {
+                delegatingHandlers = new DelegatingHandler[] { new VssHttpRetryMessageHandler(settings.MaxRetryRequest) };
+            }
+
+            // Setup RawHttpMessageHandler without credentials
+            var httpMessageHandler = new RawHttpMessageHandler(new NoOpCredentials(null), settings);
+
+            var pipeline = HttpClientFactory.CreatePipeline(httpMessageHandler, delegatingHandlers);
+
+            return new ResultsHttpClient(uri, pipeline, token, disposeHandler: true);
+        }
+
         public Task CreateResultsStepSummaryAsync(string planId, string jobId, Guid stepId, string file,
             CancellationToken cancellationToken)
         {

src/Runner.Sdk/Util/VssUtil.cs

@@ -85,6 +85,35 @@ public static RawConnection CreateRawConnection(
             VssCredentials credentials,
             IEnumerable<DelegatingHandler> additionalDelegatingHandler = null,
             TimeSpan? timeout = null)
+        {
+            RawClientHttpRequestSettings settings = GetHttpRequestSettings(timeout);
+            RawConnection connection = new(serverUri, new RawHttpMessageHandler(credentials.Federated, settings), additionalDelegatingHandler);
+            return connection;
+        }
+
+        public static VssCredentials GetVssCredential(ServiceEndpoint serviceEndpoint)
+        {
+            ArgUtil.NotNull(serviceEndpoint, nameof(serviceEndpoint));
+            ArgUtil.NotNull(serviceEndpoint.Authorization, nameof(serviceEndpoint.Authorization));
+            ArgUtil.NotNullOrEmpty(serviceEndpoint.Authorization.Scheme, nameof(serviceEndpoint.Authorization.Scheme));
+
+            if (serviceEndpoint.Authorization.Parameters.Count == 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(serviceEndpoint));
+            }
+
+            VssCredentials credentials = null;
+            string accessToken;
+            if (serviceEndpoint.Authorization.Scheme == EndpointAuthorizationSchemes.OAuth &&
+                serviceEndpoint.Authorization.Parameters.TryGetValue(EndpointAuthorizationParameters.AccessToken, out accessToken))
+            {
+                credentials = new VssCredentials(new VssOAuthAccessTokenCredential(accessToken), CredentialPromptType.DoNotPrompt);
+            }
+
+            return credentials;
+        }
+
+        public static RawClientHttpRequestSettings GetHttpRequestSettings(TimeSpan? timeout = null)
         {
             RawClientHttpRequestSettings settings = RawClientHttpRequestSettings.Default.Clone();
 
@@ -116,30 +145,7 @@ public static RawConnection CreateRawConnection(
             // settings are applied to an HttpRequestMessage.
             settings.AcceptLanguages.Remove(CultureInfo.InvariantCulture);
 
-            RawConnection connection = new(serverUri, new RawHttpMessageHandler(credentials.Federated, settings), additionalDelegatingHandler);
-            return connection;
-        }
-
-        public static VssCredentials GetVssCredential(ServiceEndpoint serviceEndpoint)
-        {
-            ArgUtil.NotNull(serviceEndpoint, nameof(serviceEndpoint));
-            ArgUtil.NotNull(serviceEndpoint.Authorization, nameof(serviceEndpoint.Authorization));
-            ArgUtil.NotNullOrEmpty(serviceEndpoint.Authorization.Scheme, nameof(serviceEndpoint.Authorization.Scheme));
-
-            if (serviceEndpoint.Authorization.Parameters.Count == 0)
-            {
-                throw new ArgumentOutOfRangeException(nameof(serviceEndpoint));
-            }
-
-            VssCredentials credentials = null;
-            string accessToken;
-            if (serviceEndpoint.Authorization.Scheme == EndpointAuthorizationSchemes.OAuth &&
-                serviceEndpoint.Authorization.Parameters.TryGetValue(EndpointAuthorizationParameters.AccessToken, out accessToken))
-            {
-                credentials = new VssCredentials(new VssOAuthAccessTokenCredential(accessToken), CredentialPromptType.DoNotPrompt);
-            }
-
-            return credentials;
+            return settings;
         }
     }
 }

src/Sdk/Common/Common/Authentication/NoOpCredentials.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace GitHub.Services.Common
+{
+    // Set of classes used to bypass token operations
+    // Results Service and External services follow a different auth model but
+    // we are required to pass in a credentials object to create a RawHttpMessageHandler
+    public class NoOpCredentials : FederatedCredential
+    {
+        public NoOpCredentials(IssuedToken initialToken) : base(initialToken)
+        {
+        }
+
+        public override VssCredentialsType CredentialType { get; }
+        protected override IssuedTokenProvider OnCreateTokenProvider(Uri serverUrl, IHttpResponse response)
+        {
+            return null;
+        }
+    }
+}

src/Sdk/Common/Common/RawHttpMessageHandler.cs

@@ -109,7 +109,7 @@ protected override async Task<HttpResponseMessage> SendAsync(
             lock (m_thisLock)
             {
                 // Ensure that we attempt to use the most appropriate authentication mechanism by default.
-                if (m_tokenProvider == null)
+                if (m_tokenProvider == null && !(this.Credentials is NoOpCredentials))
                 {
                     m_tokenProvider = this.Credentials.CreateTokenProvider(request.RequestUri, null, null);
                 }
@@ -121,7 +121,8 @@ protected override async Task<HttpResponseMessage> SendAsync(
             HttpResponseMessageWrapper responseWrapper;
 
             Boolean lastResponseDemandedProxyAuth = false;
-            Int32 retries = m_maxAuthRetries;
+            // do not retry if we cannot recreate tokens
+            Int32 retries = this.Credentials is NoOpCredentials ? 0 : m_maxAuthRetries;
             try
             {
                 tokenSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
@@ -138,8 +139,12 @@ protected override async Task<HttpResponseMessage> SendAsync(
                     }
 
                     // Let's start with sending a token
-                    IssuedToken token = await m_tokenProvider.GetTokenAsync(null, tokenSource.Token).ConfigureAwait(false);
-                    ApplyToken(request, token, applyICredentialsToWebProxy: lastResponseDemandedProxyAuth);
+                    IssuedToken token = null;
+                    if (m_tokenProvider != null)
+                    {
+                        token = await m_tokenProvider.GetTokenAsync(null, tokenSource.Token).ConfigureAwait(false);
+                        ApplyToken(request, token, applyICredentialsToWebProxy: lastResponseDemandedProxyAuth);
+                    }
 
                     // The WinHttpHandler will chunk any content that does not have a computed length which is
                     // not what we want. By loading into a buffer up-front we bypass this behavior and there is