I doesn\'t appear in the meta data--whether an object is a folder or not. Is there a specific method you guys on SO know of? I can\'t find anything of worth in Google search.<
Objects are not folders. From the docs:
An Amazon S3 bucket has no directory hierarchy such as you would find in a typical computer file system. You can, however, create a logical hierarchy by using object key names that imply a folder structure.
The best you can do is use GET Bucket (list objects) to get some info about the contents of the bucket:
http://docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketGET.html