HTTP 418 I'm A Teapot is defined in RFC 2342 - Hyper Text Coffee Pot Control Protocol (HTCPC/1.0). It's intended to be returned whenever a teapot is asked to brew coffee.
The BBC's 404 error is one of the last remaining places where you can see Bubbles the Clown, known by Brits of a sufficient age from the BBC Test Card.
Unfortunately, this teapot server doesn't implement most of the commands from the spec. When you try to send a BREW, PROPFIND, or WHEN request, it returns a 405 error (method not allowed). When you POST, it replies that a length is required (411 error), but using post instead of BREW is deprecated.
I've always been curious... how does Google manage routing of their main domain name? google.com/_____ has so many paths that must be served by so many programs running on so many different machines.
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[ 4.7 ms ] story [ 33.7 ms ] threadThat originates from an Internet Engineering Task Force (IETF) April fools' joke.
https://tools.ietf.org/html/rfc2324
http://www.bbc.co.uk/404
https://en.wikipedia.org/wiki/Test_Card_F
Also, the cup fills up.