amazon web services - Difference between upload() and putObject() for uploading a file to S3?

Question

In the aws-sdk's S3 class, what is the difference between upload() and putObject()? They seem to do the same thing. Why might I prefer one over the other?

Answer 1

The advantage to using AWS SDK upload() over putObject() is as below:

• If the reported MD5 upon upload completion does not match, it retries.
• If the file size is large enough, it uses multipart upload to upload parts in parallel.
• Retry based on the client's retry settings.
• You can use for Progress reporting.
• Sets the ContentType based on file extension if you do not provide it.