Some clients (WinSCP, android mp3 player) do not work correctly

[BlaineEXE]

A user has reported this:

trying to use other apps like android s3 music player won't work because it tries to "list buckets" within the single bucket connection =(
context:
if I connect to the store without specifying a /bucket-name string after the subdomain.domain I get an error saying "Specify Target Bucket" at the WinSCP client (when trying to upload something)
at the same time there's no list of available buckets (even the 1 created with bucketClaim+bucketAccess combo)
so I rather connect using /bucket-name at the url (using folders settings in WinSCP) or the connection is credential-valid but not usable
finally more basic apps like the android mp3 player for s3 buckets will throw an error because it will stay in the same situation: trying to list buckets

This is the default set of allowed policy actions, which don't seem to be allowing clients to list their own buckets despite the ListAllMyBuckets permission being set:

ceph-cosi/pkg/util/s3client/policy.go

Lines 79 to 112 in fed3305

	// AllowedActions is a lenient default list of actions
	var AllowedActions = []action{
	DeleteObject,
	DeleteObjectVersion,
	GetBucketAcl,
	GetBucketCORS,
	GetBucketLocation,
	GetBucketLogging,
	GetBucketNotification,
	GetBucketTagging,
	GetBucketVersioning,
	GetBucketWebsite,
	GetObject,
	GetObjectAcl,
	GetObjectTorrent,
	GetObjectVersion,
	GetObjectVersionAcl,
	GetObjectVersionTorrent,
	ListAllMyBuckets,
	ListBucket,
	ListBucketMultiPartUploads,
	ListBucketVersions,
	ListMultipartUploadParts,
	PutBucketTagging,
	PutBucketVersioning,
	PutBucketWebsite,
	PutBucketVersioning,
	PutLifecycleConfiguration,
	PutObject,
	PutObjectAcl,
	PutObjectVersionAcl,
	PutReplicationConfiguration,
	RestoreObject,
	}

It's unclear to me exactly what the issue is. This could be a permissions issue from COSI, or perhaps these clients require vhost-style access. We are working on that in Rook here: rook/rook#13022

[thotz]

Can provide more details like URL they are trying to access, RGW pod logs preferably in debug level 20?