form-data encoding support?

[winterland1989]

It seems current encodedFormBody implementation doesn't support file input, while my company's file uploading api dosen't support PUT raw file, i'd like request a feature that allow building POST request with file with form-data/multipart encoded : )

[hvr]

Such an InputStream should be actually quite easy to implement (assuming one provide a boundary-marker string that doesn't occur in the content-stream...)