list_blobs doesn't work at all when delimiter is specified

[makhdumi]

When list_blobs is called with a delimiter, e.g. /, it does not return any results despite the server returning a valid response.

This part in blob_enumeration_results_from_xml doesn't check for (xml > "Blobs") > "BlobPrefix" which is what the server returns when delimiter is specified.

If this is actually an issue, it's very surprising since this use case of list_blobs is extremely common and even the default in other client libraries. It's needed when trying to traverse a pseudo-directory structure in blob storage, otherwise, results are returned "flat" or "recursive," and with thousands of blobs, it's not usable.

See here the .NET client, where it uses a delimiter (/) by default (useFlatBlobListing is false by default).

I would submit a pull request (after signing the CLA) but don't know how you want the results of this returned, given that the results don't represent actual Blobs, just prefixes.

[makhdumi]

Here is a quick and dirty fix. Not production code - but the tests should demonstrate the issue.

In the other clients, there is a super class which Blobs (and then BlockBlobs, AppendBlobs, PageBlobs) and BlobPrefixes share.

makhdumi@ac45844

[yaxia]

@makhdumi Thanks for raising the issue. If you are going to submit a fix, we expect the result is still an array. This array can hold two kinds of objects, one is Azure::Storage::Blob, the other one is a string whose value is the prefix value.

[makhdumi]

@yaxia I've submitted pull request with the fix, #42

[vinjiang]

Thanks for your contribution, it's now in latest release.