Azure Storage Services REST API; Blob Batch; DELETE Operation "One of the request inputs is not valid"

Hi all,

I'm having trouble using the "Blob Batch"-operation of the Blob Service REST API. I tried a lot with the REST Client for VS Code but can't get it to work. Can you help?

I tried out the C# example from here to make sure, that the operation on the account works this way (which it does)

// Get a connection string to our Azure Storage account.  
string connectionString = ""BlobEndpoint=https://<myaccount>.blob.core.windows.net/;QueueEndpoint=https://<myaccount>.queue.core.windows.net/;FileEndpoint=https://<myaccount>.file.core.windows.net/;TableEndpoint=https://<myaccount>.table.core.windows.net/;SharedAccessSignature=sv=2019-12-12&ss=bfqt&srt=sco&sp=rwdlacuptfx&se=2022-01-03T18:22:05Z&st=2021-01-02T10:22:05Z&spr=https&sig=z1Sdb7mKy7RWep0bbMFw9omoponD6iosvyrlfwJE%2BwI%3D";";  
string containerName = "sample-container";  
  
// Get a reference to a container named "sample-container" and then create it  
BlobServiceClient service = new BlobServiceClient(connectionString);  
BlobContainerClient container = service.GetBlobContainerClient(containerName);  
container.Create();  
  
// Create three blobs named "foo", "bar", and "baz"  
BlobClient foo = container.GetBlobClient("foo");  
BlobClient bar = container.GetBlobClient("bar");  
BlobClient baz = container.GetBlobClient("baz");  
foo.Upload(new MemoryStream(Encoding.UTF8.GetBytes("Foo!")));  
bar.Upload(new MemoryStream(Encoding.UTF8.GetBytes("Bar!")));  
baz.Upload(new MemoryStream(Encoding.UTF8.GetBytes("Baz!")));  
  
// Delete all three blobs at once  
BlobBatchClient batch = service.GetBlobBatchClient();  
batch.DeleteBlobs(new Uri[] { foo.Uri, bar.Uri, baz.Uri });  

I then captured the request with Fiddler Everywhere, which returned something like this

POST https://<myaccount>.blob.core.windows.net/?sv=2019-12-12&ss=bfqt&srt=sco&sp=rwdlacuptfx&se=2022-01-03T18:22:05Z&st=2021-01-02T10:22:05Z&spr=https&sig=z1Sdb7mKy7RWep0bbMFw9omoponD6iosvyrlfwJE%2BwI%3D&comp=batch HTTP/1.1  
Host: <myaccount>.blob.core.windows.net  
x-ms-version: 2020-02-10  
x-ms-client-request-id: 04dc79e6-ea49-4f69-96b7-6068834d0c7e  
x-ms-return-client-request-id: true  
User-Agent: azsdk-net-Storage.Blobs/12.7.0 (.NET Core 3.1.1; Microsoft Windows 10.0.19042)  
Content-Length: 1410  
Content-Type: multipart/mixed; boundary=batch_275688cb-ff20-5a51-b98b-7eda33c7a8fc  
  
--batch_275688cb-ff20-5a51-b98b-7eda33c7a8fc  
Content-Type: application/http  
Content-Transfer-Encoding: binary  
Content-ID: 0  
  
DELETE /sample-container3/foo?sv=2019-12-12&ss=bfqt&srt=sco&spr=https&st=2021-01-02T10%3A22%3A05Z&se=2022-01-03T18%3A22%3A05Z&sp=rwdlacuptfx&sig=z1Sdb7mKy7RWep0bbMFw9omoponD6iosvyrlfwJE%2BwI%3D HTTP/1.1  
x-ms-client-request-id: 146cb67e-6e16-46ef-a870-834ac05d0704  
x-ms-return-client-request-id: true  
Content-Length: 0  
  
--batch_275688cb-ff20-5a51-b98b-7eda33c7a8fc  
Content-Type: application/http  
Content-Transfer-Encoding: binary  
Content-ID: 1  
  
DELETE /sample-container3/bar?sv=2019-12-12&ss=bfqt&srt=sco&spr=https&st=2021-01-02T10%3A22%3A05Z&se=2022-01-03T18%3A22%3A05Z&sp=rwdlacuptfx&sig=z1Sdb7mKy7RWep0bbMFw9omoponD6iosvyrlfwJE%2BwI%3D HTTP/1.1  
x-ms-client-request-id: 37a0af7f-9c84-482e-a70c-1bf1b6ed2a38  
x-ms-return-client-request-id: true  
Content-Length: 0  
  
--batch_275688cb-ff20-5a51-b98b-7eda33c7a8fc  
Content-Type: application/http  
Content-Transfer-Encoding: binary  
Content-ID: 2  
  
DELETE /sample-container3/baz?sv=2019-12-12&ss=bfqt&srt=sco&spr=https&st=2021-01-02T10%3A22%3A05Z&se=2022-01-03T18%3A22%3A05Z&sp=rwdlacuptfx&sig=z1Sdb7mKy7RWep0bbMFw9omoponD6iosvyrlfwJE%2BwI%3D HTTP/1.1  
x-ms-client-request-id: 15bd4ed6-24be-53e2-8071-e18264b1ca30  
x-ms-return-client-request-id: true  
Content-Length: 0  
  
--batch_275688cb-ff20-5a51-b98b-7eda33c7a8fc--  

I then tried to execute basically the same (only with "sample-container3" instead of "sample-container2") within VS Code, but whatever I try, I receive a "HTTP 202 Accepted" as the "main status", but a "HTTP 400 One of the request inputs is not valid." as the batch response:

HTTP/1.1 202 Accepted  
Transfer-Encoding: chunked  
Content-Type: multipart/mixed; boundary=batchresponse_1a182dda-7a4c-46aa-a9b8-aa8cfb469b16  
Server: Windows-Azure-Blob/1.0 Microsoft-HTTPAPI/2.0  
x-ms-request-id: 04690b42-801e-003c-6fbf-e16890000000  
x-ms-version: 2020-02-10  
x-ms-client-request-id: 04dc79e6-ea49-4f69-96b7-6068834d0c7e  
Date: Sun, 03 Jan 2021 10:59:37 GMT  
Connection: close  
  
--batchresponse_1a182dda-7a4c-46aa-a9b8-aa8cfb469b16  
Content-Type: application/http  
  
HTTP/1.1 400 One of the request inputs is not valid.  
x-ms-error-code: InvalidInput  
x-ms-request-id: 04690b42-801e-003c-6fbf-e16890000000  
x-ms-version: 2020-02-10  
x-ms-client-request-id: 04dc79e6-ea49-4f69-96b7-6068834d0c7e  
Content-Length: 221  
Content-Type: application/xml  
Server: Windows-Azure-Blob/1.0  
  
<?xml version="1.0" encoding="utf-8"?>  
<Error><Code>InvalidInput</Code><Message>One of the request inputs is not valid.  
RequestId:04690b42-801e-003c-6fbf-e16890000000  
Time:2021-01-03T10:59:38.0731174Z</Message></Error>  
--batchresponse_1a182dda-7a4c-46aa-a9b8-aa8cfb469b16--  

Any idea what I'm doing wrong? I also already tried it with Shared Key-auth, with only one request in the batch, with different header-combinations... But whatever I try: I get the "202 Accepted" plus the "400 One of the request inputs is not valid".

Thanks in advance for your help!
Cheers
Simon