If two or more metadata headers with the same name are submitted for a resource would the blob service return 200 or 400?

Question

According to
https://zcusa.951200.xyz/en-us/learn/modules/work-azure-blob-storage/5-set-retrieve-properties-metadata-rest -

If two or more metadata headers with the same name are submitted for a resource, the Blob service returns status code 400 (Bad Request).

But According to
https://zcusa.951200.xyz/en-us/learn/modules/work-azure-blob-storage/4-manage-container-properties-metadata-dotnet -

If two or more metadata headers with the same name are submitted for a resource, Blob storage comma-separates and concatenates the two values and return HTTP response code 200 (OK).

Well, Which is it?

Am I tripping?

Accepted Answer

@adarsh sharma
If using the REST API it will return 400 (Bad Request). If using .NET SDK it will comma-separate and concatenate and return 200 (OK).

Hope this helps to clarify.

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Answer

The SetMetadata function resets the metadata before setting new values, meaning that it doesn't do an update. The parameter for the metadata is a dictionary, and dictionaries don't allow for duplicate keys. So how can a duplicate metadata field ever be applied using the .NET SDK?

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If two or more metadata headers with the same name are submitted for a resource would the blob service return 200 or 400?

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