aws-sdk-rust (cargo): Important Enhancements: 1) Supports V2 and V4 API Signatures for third party S3 compliant products like Ceph 2) Works from behind proxies 3) Returned data can be in Rust structs, JSON or XML  Works only for S3. Other AWS Storage features are coming soon! 
Keywords: aws|s3|aws-sdk|aws-sdk-rust