HTTP Status Codes / 4xx HTTP Status Codes / HTTP 412

412 Precondition Failed (RFC 7232)

This is an educational reference page about HTTP 412 Precondition Failed. The page itself is served as 200 OK so it can be indexed as HTTP documentation.

The server does not meet one of the preconditions that the requester put on the request header fields.

4xx client error – the request contains bad syntax or cannot be fulfilled


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