Support for converting stream that implements `AsyncRead` into `ByteStream`

[marcustut]

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Describe the feature

At the moment ByteStream can be made from file or from a Vec<u8>, however for the case of a web server, that meant I have to first copy the contents from the request into my local filesystem or to the memory. It would be nice if ByteStream can take a stream that implements AsyncRead hence making it a lazy stream.

Use Case

To be able to use multipart upload without copying the contents local filesystem.

Proposed Solution

Allow ByteStream to supports AsyncRead

Other Information

No response

Acknowledgements

• [ ] I may be able to implement this feature request
• [ ] This feature might incur a breaking change

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