AWS S3: Use mulitpart post to upload large files from Streams. #628
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After #435 , we started using MemoryStream for Stream Uploads because we don't know the object size of the network stream.
AWS S3 High Level API does not support uploads of Streams with undefined length.
The LowLevel S3 API does support upload of streams with undefined length. We start using this mechanism.
Code was inspired from:
https://github.com/mlhpdx/s3-upload-stream