Reverse proxy to a WebDAV file source

[peaeater]

I currently use imageflow-dotnet to transform images served from the local disk from a location mapped to a "/media/" prefix via the ImageflowMiddlewareOptions.MapPath method. Files that aren't images are served via UseStaticFiles with a PhysicalFileProvider mapped to the same prefix.

I now am being asked to work with a reverse proxy (YARP) to a WebDAV file source scenario, where WebDAV uses Basic authentication. Human-friendly non-image file URLs won't be a problem, but how do I get Imageflow middleware to handle the image files and retain human-friendly URLs? Should I switch to imageflow-dotnet-server and use the RemoteReader? I can pass it an HttpClient with the 'Authorization' header set, but I'm flummoxed as to whether the browser can send in "/media/abc/123.jpg" and somehow have Imageflow fetch it from "https://1.2.3.4:5006/abc/123.jpg".

Unless... I've also seen the CustomBlob example. If the RemoteReader is not the answer, is it then possible to create my own custom service based on IBlobProvider?