Uploading a file to a Boost Beast Server

From: Bill Moo (mookimoo73_at_[hidden])
Date: 2020-03-23 15:04:32

I am using Beast 277 and code from the advanced server example as the
basis for my own one. As part of the functionality I need to allow
users the ability to upload a file to the server via their browser. So
I had a look at the 'Deferred Body Type' in the examples provided but
I can't see how I can make use of it in my own server, although I have
tried but fall foul of the SyncReadStream.

Is there a working example anywhere of how I can capture and save a
file uploaded to the server by a user please.
--
Bill