Handle nested failures in HttpRequestException

.github/dependabot.yml

@@ -0,0 +1,13 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+# especially
+# https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot#enabling-dependabot-version-updates-for-actions
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"

.github/workflows/build.yaml

@@ -42,25 +42,25 @@ jobs:
       run: src\scripts\CreateBuildArtifacts.bat ${{ matrix.configuration }} artifacts
 
     - name: Upload functional tests drop
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: FunctionalTests_${{ matrix.configuration }}
         path: artifacts\GVFS.FunctionalTests
 
     - name: Upload FastFetch drop
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: FastFetch_${{ matrix.configuration }}
         path: artifacts\FastFetch
 
     - name: Upload installers
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: Installers_${{ matrix.configuration }}
         path: artifacts\GVFS.Installers
 
     - name: Upload NuGet packages
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: NuGetPackages_${{ matrix.configuration }}
         path: artifacts\NuGetPackages
@@ -76,13 +76,13 @@ jobs:
 
     steps:
     - name: Download installers
-      uses: actions/download-artifact@v2
+      uses: actions/download-artifact@v4
       with:
         name: Installers_${{ matrix.configuration }}
         path: install
 
     - name: Download functional tests drop
-      uses: actions/download-artifact@v2
+      uses: actions/download-artifact@v4
       with:
         name: FunctionalTests_${{ matrix.configuration }}
         path: ft
@@ -101,7 +101,7 @@ jobs:
 
     - name: Upload installation logs
       if: always()
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: InstallationLogs_${{ matrix.configuration }}
         path: install\logs
@@ -115,14 +115,14 @@ jobs:
 
     - name: Upload functional test results
       if: always()
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: FunctionalTests_Results_${{ matrix.configuration }}
         path: TestResult.xml
 
     - name: Upload Git trace2 output
       if: always()
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: GitTrace2_${{ matrix.configuration }}
         path: C:\temp\git-trace2.log

GVFS/GVFS.Common/Http/HttpRequestor.cs

@@ -134,6 +134,14 @@ protected GitEndPointResponseData SendRequest(
                 {
                     response = this.client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken).GetAwaiter().GetResult();
                 }
+                catch (HttpRequestException httpRequestException) when (TryGetResponseMessageFromHttpRequestException(httpRequestException, request, out response))
+                {
+                    /* HttpClientHandler will automatically resubmit in certain circumstances, such as a 401 unauthorized response when UseDefaultCredentials
+                     * is true but another credential was provided. This resubmit can throw (instead of returning a proper status code) in some case cases, such
+                     * as when there is an exception loading the default credentials.
+                     * If we can extract the original response message from the exception, we can continue and process the original failed status code. */
+                    Tracer.RelatedWarning(responseMetadata, $"An exception occurred while resubmitting the request, but the original response is available.");
+                }
                 finally
                 {
                     responseWaitTime = requestStopwatch.Elapsed;
@@ -278,5 +286,48 @@ private static string GetSingleHeaderOrEmpty(HttpHeaders headers, string headerN
 
             return string.Empty;
         }
+
+        /// <summary>
+        /// This method is based on a private method System.Net.Http.HttpClientHandler.CreateResponseMessage
+        /// </summary>
+        private static bool TryGetResponseMessageFromHttpRequestException(HttpRequestException httpRequestException, HttpRequestMessage request, out HttpResponseMessage httpResponseMessage)
+        {
+            var webResponse = (httpRequestException?.InnerException as WebException)?.Response as HttpWebResponse;
+            if (webResponse == null)
+            {
+                httpResponseMessage = null;
+                return false;
+            }
+
+            httpResponseMessage = new HttpResponseMessage(webResponse.StatusCode);
+            httpResponseMessage.ReasonPhrase = webResponse.StatusDescription;
+            httpResponseMessage.Version = webResponse.ProtocolVersion;
+            httpResponseMessage.RequestMessage = request;
+            httpResponseMessage.Content = new StreamContent(webResponse.GetResponseStream());
+            request.RequestUri = webResponse.ResponseUri;
+            WebHeaderCollection rawHeaders = webResponse.Headers;
+            HttpContentHeaders responseContentHeaders = httpResponseMessage.Content.Headers;
+            HttpResponseHeaders responseHeaders = httpResponseMessage.Headers;
+            if (webResponse.ContentLength >= 0)
+            {
+                responseContentHeaders.ContentLength = webResponse.ContentLength;
+            }
+
+            for (int i = 0; i < rawHeaders.Count; i++)
+            {
+                string key = rawHeaders.GetKey(i);
+                if (string.Compare(key, "Content-Length", StringComparison.OrdinalIgnoreCase) != 0)
+                {
+                    string[] values = rawHeaders.GetValues(i);
+                    if (!responseHeaders.TryAddWithoutValidation(key, values))
+                    {
+                        bool flag = responseContentHeaders.TryAddWithoutValidation(key, values);
+                    }
+                }
+            }
+
+            return true;
+
+        }
     }
 }