[1] AnyEvent::HTTP - search.cpan.org ( (2013-10-03 11:20:34 +09:00 版)) <http://search.cpan.org/dist/AnyEvent-HTTP/HTTP.pm#599_-_other,_usually_nonretryable,_errors_(garbled_URL_etc.).>

[2] List of HTTP status codes - Wikipedia, the free encyclopedia ( (2013-10-01 11:44:11 +09:00 版)) <http://en.wikipedia.org/wiki/List_of_HTTP_status_codes#599>