Identifying an image stream whilst streaming it elsewhere

[ozziepeeps]

Hi community. Thank you in advance for a great library and for helping out 👍

I have a .NET Stream that I am streaming up to AWS S3 via the AWSSDK. The benefit of this is I don't need to have the entire file (represented by the Stream) in memory at once so it is memory efficient.

I'd also like to be able to leverage ImageSharp's Identify method (which takes a Stream) to extract the image dimensions. Is there an approach I can take to stream the file up to S3 and also end up being able to get the dimensions from Identify in a single pass?

I have to assume that the Stream is not seekable (since it is coming in from an HTTP request), and don't want to copy it into a MemoryStream as that will spike my memory usage and some of my files can be very large.

I'm looking for perhaps a "decorator" approach where I can wrap the Stream and stream it up to S3 and in the process also have ImageSharp process the Stream in order to `Identify’ the dimensions.

Any ideas would be much appreciated! Thank you!