[Storage] Added a breaking warning : download blob will block input parameter -AbsoluteUri and -Context together (#26377)

* [Storage] Added a warning for an upcoming breaking change for download blob with parameter -AbsoluteUri will not allow parameter -Context be input together.

* add 1 more change log

* fix warning not show problem

Author: blueww

src/Storage/Storage.Management/ChangeLog.md

@@ -18,6 +18,9 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Added a warning for an upcoming breaking change for download blob will block input parameter -AbsoluteUri and -Context together.
+    - `Get-AzStorageBlobContent`
+* Revised AzureStorageBlob construct logic to make it more stable.
 
 ## Version 7.4.0
 * Added a warning for an upcoming breaking change for removing references to "Microsoft.Azure.Storage.File"

src/Storage/Storage/Blob/Cmdlet/GetAzureStorageBlobContent.cs

@@ -30,6 +30,7 @@
 using Track2Models = global::Azure.Storage.Blobs.Models;
 using Azure.Storage.Blobs;
 using Azure.Storage;
+using Microsoft.WindowsAzure.Commands.Common.CustomAttributes;
 
 namespace Microsoft.WindowsAzure.Commands.Storage.Blob.Cmdlet
 {
@@ -112,6 +113,7 @@ public SwitchParameter CheckMd5
 
         private bool checkMd5;
 
+        [CmdletParameterBreakingChangeWithVersion("AbsoluteUri", "13.0.0", "8.0.0", ChangeDescription = "When download blob with parameter AbsoluteUri (alias Uri, BlobUri), parameter Context will not be allowed to input together.")]
         [Alias("Uri", "BlobUri")]
         [Parameter(HelpMessage = "Blob uri to download from.", Mandatory = true,
             ValueFromPipelineByPropertyName = true, ParameterSetName = UriParameterSet)]

src/Storage/Storage/Blob/StorageDataMovementCmdletBase.cs

@@ -112,20 +112,7 @@ protected override void BeginProcessing()
 
         protected virtual void DoBeginProcessing()
         {
-            CmdletOperationContext.Init();
-            CmdletCancellationToken = _cancellationTokenSource.Token;
-            WriteDebugLog(String.Format(Resources.InitOperationContextLog, GetType().Name, CmdletOperationContext.ClientRequestId));
-
-            if (_enableMultiThread)
-            {
-                SetUpMultiThreadEnvironment();
-            }
-
-            OpContext.GlobalSendingRequest +=
-                (sender, args) =>
-                {
-                    //https://github.com/Azure/azure-storage-net/issues/658
-                };
+            base.BeginProcessing();
 
             OutputStream.ConfirmWriter = (s1, s2, s3) => ShouldContinue(s2, s3);
 

src/Storage/Storage/Common/AzureStorageBlob.cs

@@ -414,7 +414,7 @@ public static CloudBlob GetTrack1Blob(BlobBaseClient track2BlobClient, StorageCr
                 return new InvalidCloudBlob(track2BlobClient.Uri, credentials);
             }
 
-            if (credentials.IsSAS) // the Uri already contains credentail.
+            if (credentials != null && credentials.IsSAS) // the Uri already contains credentail.
             {
                 credentials = null;
             }
@@ -497,12 +497,12 @@ public static BlobClient GetTrack2BlobClient(BlobBaseClient blobBaseClient, Azur
                 return (BlobClient)blobBaseClient;
             }
             BlobClient blobClient;
-            if (context.StorageAccount != null && context.StorageAccount.Credentials != null && context.StorageAccount.Credentials.IsToken) //Oauth
+            if (context != null && context.StorageAccount != null && context.StorageAccount.Credentials != null && context.StorageAccount.Credentials.IsToken) //Oauth
             {
                 blobClient = new BlobClient(blobBaseClient.Uri, context.Track2OauthToken, options);
 
             }
-            else if (context.StorageAccount != null && context.StorageAccount.Credentials != null && context.StorageAccount.Credentials.IsSharedKey) //Shared Key
+            else if (context != null && context.StorageAccount != null && context.StorageAccount.Credentials != null && context.StorageAccount.Credentials.IsSharedKey) //Shared Key
             {
                 blobClient = new BlobClient(blobBaseClient.Uri,
                     new StorageSharedKeyCredential(context.StorageAccountName, context.StorageAccount.Credentials.ExportBase64EncodedKey()), options);