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https://issues.apache.org/jira/browse/JCLOUDS-955?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timur Alperovich resolved JCLOUDS-955.
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Resolution: Fixed
Fix Version/s: 2.0.0
> jclouds strips off the delimiter from common prefixes (at least in S3)
> ----------------------------------------------------------------------
>
> Key: JCLOUDS-955
> URL: https://issues.apache.org/jira/browse/JCLOUDS-955
> Project: jclouds
> Issue Type: Bug
> Reporter: Timur Alperovich
> Assignee: Timur Alperovich
> Fix For: 2.0.0
>
>
> I noticed that jclouds strips off the delimiter when returning results that
> include common prefixes. For example, if blobs "test/foo" and "test/bar" are
> in the container, listing the container non-recursively (i.e. setting the
> delimiter to "/"), will return "test", whereas the providers commonly return
> "test/".
> AWS S3\[[#1]\], OpenStack Swift\[#2\], Google Cloud Storage\[[#3]\], and
> Azure\[[#4]\] all include the delimiter string (or character, in the case of
> Swift) in the results.
> This may not be a valid issue if this was always the intent of jclouds to
> elide the delimiter parameter. In which case, could someone elaborate about
> the reasons for that here? If this is the expected behavior, I would be happy
> to amend the prefix changes to _not_ include the delimiter in the Local Blob
> Store listings. Otherwise, I'm also happy to expose the results as-is in the
> other providers.
> References:
> {anchor:1} 1. From [AWS S3 List
> documentation|http://docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketGET.html]:
> "In effect, CommonPrefixes lists keys that act like subdirectories in the
> directory specified by Prefix. For example, if prefix is notes/ and delimiter
> is a slash \(/\), in notes/summer/july, the common prefix is notes/summer/."
> {anchor:2} 2. Swift does not explicitly document this, however, using the
> swift client, one can observe the behavior where specifying "\-" as a
> delimiter results in the following json (the container has keys "tmp-foo" and
> "tmp-bar"): \{"subdir": "tmp-"\}.
> {anchor:3} 3. From the [GCS
> API|https://cloud.google.com/storage/docs/json_api/v1/objects/list]: "Objects
> whose names, aside from the prefix, contain delimiter will have their name,
> truncated after the delimiter, returned in prefixes."
> {anchor:4} 4. From the [Azure Blobs
> API|https://msdn.microsoft.com/en-us/library/azure/hh452233.aspx]: "The value
> of the BlobPrefix element is substring+delimiter, where substring is the
> common substring that begins one or more blob names, and delimiter is the
> value of the delimiter parameter."
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