bug: S3 "folder" key has no ending slash

[spring1915]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

The results of listing S3 bucket objects don't contain a forward slash for "folder" objects. For instance, if a bucket contains "folders" abc, and def, then the result is

/abc/def
/abc/def/config.json

Expected Behavior

The ending slash for def.

/abc/def/
/abc/def/config.json

How are you starting LocalStack?

Custom (please describe below)

Steps To Reproduce

How are you starting localstack (e.g., bin/localstack command, arguments, or docker-compose.yml)

Start localstack with docker or localstack cli.

s3 = boto3.client('s3',
              endpoint_url="<http://localhost.localstack.cloud:4566>",
                region_name='us-east-1',
                aws_access_key_id="test",
                aws_secret_access_key="test",)
  paginator = s3.get_paginator('list_objects_v2')
  operation_parameters = {'Bucket': bucket_name, 'Prefix': prefix}

  for page in paginator.paginate(**operation_parameters):
      for obj in page['Contents']:
          key = obj['Key']

Environment

- OS: Mac
- LocalStack: 3.3.0

Anything else?

No response

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[bentsku]

Hello @spring1915 and thanks for your report!

It's not clear what the issue is here. "Folder" objects are technically defined by yourself or the SDK, you would have to create them yourself.

Could you please share the commands done to create those particular folder keys? We should have pretty good parity with keys finishing with / or not.

I believe that if you create a key named /abc/def/, then the call to ListObjectsV2 should return /abc/def/.
The report does not share how those keys are created.

Thanks!

[spring1915]

Thanks @bentsku . I used the "Create Folder" button of Localstack Desktop to create a new folder.

It seems that I found a way to get it over. When hitting "Create Folder", a name ending with a slash must be included as the folder name. Making a folder without this character results in the missing of a slash when listing bucket objects, even although the folder is indicated as being successfully created.

[bentsku]

Hello @spring1915 and thanks for the quick feedback!

So to be sure, when in AWS S3 you'd create a "folder" key, it would come with a trailing slash. But with the same action with the LocalStack Desktop app, it does not. This looks like an issue in our application then and not S3. I will share this issue with the related team, and update you here. Thank you!