aws backend service framework
- put object
- get object
- head object
- delete object
- create bucket
- head bucket
- list bucket
- delete bucket
- get bucket location
- range get
- multipart upload
- get object acl
- set object acl
- get bucket acl
- set bucket acl
- get object metadata
- put object metadata
- put object tagging
- MakeBucket
- DeleteBucket
- ListBucket
- ListObject
- PutObject
- DeleteObject
- BucketExists