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Use direct transfers when your application already has the bytes in memory. Use presigned URLs when you want a simple HTTP upload or download flow outside the SDK runtime client.

Direct Upload And Download

Presigned Upload And Download URLs

Choosing Between Direct And Presigned Transfers

Use direct upload and download when:
  • The SDK client already owns the bytes.
  • You want the simplest in-process transfer path.
  • You do not need to hand off the transfer to another service.
Use presigned URLs when:
  • You want plain HTTP transfer behavior.
  • Another service or worker should perform the upload or download.
  • You want one-time or explicitly expiring transfer links.

One-Time URLs

One-time presigned URLs are supported for both upload and download. Only one concurrent request should succeed for a given one-time URL. Use this mode when you want handoff semantics rather than reusable access.