HTTP status codes are a
core part of helping your browser understand what to do with a page. You’re
probably familiar with 404 — page not found — but there are a plethora of
others, like 302, which help tell your browser a page has moved.
The Internet
Engineering Task Force (IETF) has finally created a standard for when
a page has been taken down due to legal reasons. The new status code, 451,
indicates that a host has received a legal demand to deny access to a resource.
The response code is
also intended to be used in cases where a provider in the access chain is
blocking access, such as an ISP or DNS provider, to identify which entity
blocked the page.
IETF Chair Jari Arkko
said during the vote that he was in “FULL support of this specification” and
the ballot passed unanimously.
Error 451 is approved
for publication, but needs work from the RFC Editor, but Mark Nottingham,
IETF HTTP Working Group Chair, said that “effectively, you can start using it
now.”
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