Just a note. When applied to e.g. http://example.com/x-nmos/connection/v1.0/single/senders/3c6615a2-3971-4e0a-85ff-b5d9a7894051/transportfile the output includes:
Error: Resource name of SDP file 'transportfile' does not end in '.sdp' as required by NMOS Section 2.3.
at request.then.res (E:\Projects\AMWA\sdpoker\index.js:34:26)
The specification wording is under discussion, because RFC 4566 does not mandate the extension. See AMWA-TV/is-04#63.