There are lots of reasons an RDAP server might not have info about a
domain, e.g., you ask it about a TLD it doesn't handle, and there's no
reason to assume that an RDAP server would know anything about an
unknown domain's availability.
I would think anybody doing reselling would have the availability
servers explicitly addressed and would not use redirects to find an
authoritative server, no matter the underlying protocol.
I was thinking that you're the RDAP server for .FOO and someone who's
screwed up his bootstrap asks about BLAH.BAR, with whom you have no
connection. Or you're a reseller for a thin registry and someone asks you
about a domain at another reseller, about which you have no info.
(Perhaps it was transferred and the client thinks it can speed things up
by cacheing old redirects forever.) So either way you return a 404 code.
I suppose we could pick another code for "it's not assigned but if you pay
me money it could be" but I really don't think it's a good idea to read
anything beyond "I don't know" into a normal 404 response.
Regards,
John Levine, [email protected], Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
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