Re:Whatever you set the URL to, that HTTP code will be returned
by delinka on Tuesday January 26, 2016 @07:02PM
(#10977238)
Anything unexpected returns 503. Try http://codes.io/404/ (notice the ending /)
Besides, 1223 isn't specified by the HTTP RFCs, nor is it returned anywhere except from a library call in a buggy library. I'd say it's not appropriate for an HTTP testing service to support 1223.
http://codes.io/1223 -> 503