Azure-sdk-for-net: [FEATURE REQ] Get available versions of a Blob when using Blob Storage Versioning

[chrisdusyk-iq]

Library or service name.
Azure.Storage.Blobs

Is your feature request related to a problem? Please describe.
I would love to use the versioning feature in Blob Storage to version JSON documents, however there is no easy way with the SDK to get the version IDs for a blob. There are methods to get a Blob by its name and versionId, but no obvious way to get the available versionIds for a Blob.

[jsquire]

Thank you for your feedback. Tagging and routing to the team best able to assist.

[msftbot[bot]]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @xgithubtriage.

Issue Details

---

Library or service name.
Azure.Storage.Blobs

Is your feature request related to a problem? Please describe.
I would love to use the versioning feature in Blob Storage to version JSON documents, however there is no easy way with the SDK to get the version IDs for a blob. There are methods to get a Blob by its name and versionId, but no obvious way to get the available versionIds for a Blob.

Author:	chrisdusyk-iq
Assignees:	-
Labels:	`Client`, `Service Attention`, `Storage`, `customer-reported`, `needs-team-attention`, `needs-triage`, `question`
Milestone:	-

[amnguye]

Hi,

Does this sample not list the versions for you or are you referring to something else? https://docs.microsoft.com/en-us/azure/storage/blobs/versioning-enable?tabs=portal#list-blob-versions

@seanmcc-msft Is there a method that allows for listing the versions of a blob? Or would you have to use GetBlobs and set the prefix to be the blob name in question to list the blob version?

[chrisdusyk-iq]

Hi,

Does this sample not list the versions for you or are you referring to something else? https://docs.microsoft.com/en-us/azure/storage/blobs/versioning-enable?tabs=portal#list-blob-versions

@seanmcc-msft Is there a method that allows for listing the versions of a blob? Or would you have to use GetBlobs and set the prefix to be the blob name in question to list the blob version?

I see these docs were added in November, and I hadn't looked through them again since I started looking at this in October. This looks more like what I need!

[seanmcc-msft]

I have created a PR to implement this feature request - https://github.com/Azure/azure-sdk-for-net/pull/17461

[seanmcc-msft]

We won't be able to add this feature correctly for now, we would need backend service support. https://github.com/Azure/azure-sdk-for-net/pull/17461#discussion_r540521259

[seanmcc-msft]

@chrisdusyk-iq, the best work around for you to get the version for a blob is to call BlobContainerClient.GetBlobs(prefix: [blob name], states: BlobStates.Version), and then filter out the BlobItems that aren't associated with the blob in question. This is a limiation in the backend service.

Please re-open if you have further questions!