Robust multipart/related support? about form_data

[Fryie]

I second the request, I had to use multipart/mixed recently and had to roll my own custom solution.

Ideally it would also be possible to add custom headers (like Content-Type and Content-Disposition) to body parts.

Maybe FormData is not the right place to do this, since this isn't strictly related to 'forms' anymore. I could imagine separating Multipart handling out as a gem and having FormData at a higher abstraction level. That is, one can use FormData for the 95% of the cases where the default use case is enough, and provide a lower-level Multipart class which just deals with concatening body parts correctly etc. and let the user add custom body parts with custom headers.

I don't really know all that much about HTTP, so I don't know if this made sense. :)

[ixti]

Well, initial idea of this gem was to just support emitting of multipart/form-data, but since very first release, I realized I would like it to provide a silver bullet for both emitting and parsing of request/response bodies of different types including www-urlencoded one. So I'm open for a Pull-Request (even a sketch will help a lot) as I don't have time right now to do this myself...