upgraded logging for #595 log url when connection is closed

src/Containers/Microsoft.NET.Build.Containers/ContainerBuilder.cs

@@ -238,6 +238,11 @@ private static async Task<int> PushToRemoteRegistryAsync(ILogger logger, BuiltIm
                 cancellationToken)).ConfigureAwait(false);
             logger.LogInformation(Strings.ContainerBuilder_ImageUploadedToRegistry, destinationImageReference, destinationImageReference.RemoteRegistry.RegistryName);
         }
+        catch (UnableToDownloadFromRepositoryException)
+        {
+            logger.LogError(Resource.FormatString(nameof(Strings.UnableToDownloadFromRepository)), sourceImageReference);
+            return 1;
+        }
         catch (UnableToAccessRepositoryException)
         {
             logger.LogError(Resource.FormatString(nameof(Strings.UnableToAccessRepository), destinationImageReference.Repository, destinationImageReference.RemoteRegistry!.RegistryName));

src/Containers/Microsoft.NET.Build.Containers/Exceptions/UnableToDownloadFromRepositoryException.cs

@@ -0,0 +1,12 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.NET.Build.Containers;
+
+internal sealed class UnableToDownloadFromRepositoryException : Exception
+{
+    public UnableToDownloadFromRepositoryException(string repository)
+        : base($"The download of the image from repository { repository } has failed.")
+    {
+    }
+}

src/Containers/Microsoft.NET.Build.Containers/Registry/Registry.cs

@@ -412,15 +412,22 @@ public async Task<string> DownloadBlobAsync(string repository, Descriptor descri
             return localPath;
         }
 
-        // No local copy, so download one
-        using Stream responseStream = await _registryAPI.Blob.GetStreamAsync(repository, descriptor.Digest, cancellationToken).ConfigureAwait(false);
-
         string tempTarballPath = ContentStore.GetTempFile();
-        using (FileStream fs = File.Create(tempTarballPath))
+
+        try
         {
-            await responseStream.CopyToAsync(fs, cancellationToken).ConfigureAwait(false);
-        }
+            // No local copy, so download one
+            using Stream responseStream = await _registryAPI.Blob.GetStreamAsync(repository, descriptor.Digest, cancellationToken).ConfigureAwait(false);
 
+            using (FileStream fs = File.Create(tempTarballPath))
+            {
+                await responseStream.CopyToAsync(fs, cancellationToken).ConfigureAwait(false);
+            }
+        }
+        catch (Exception)
+        {
+            throw new UnableToDownloadFromRepositoryException(repository);
+        }
         cancellationToken.ThrowIfCancellationRequested();
 
         File.Move(tempTarballPath, localPath, overwrite: true);