Amazon Simple Storage Service
Developer Guide (API Version 2006-03-01)

API Support for Multipart Upload

You can use an AWS SDK to upload an object in parts. The following AWS SDK libraries support multipart upload:

These libraries provide a high-level abstraction that makes uploading multipart objects easy. However, if your application requires, you can use the REST API directly. The following sections in the Amazon Simple Storage Service API Reference describe the REST API for multipart upload.