428 Precondition Required
The HTTP 428 Precondition Required response status code
indicates that the server requires the request to be conditional.
Typically, this means that a required precondition header, such
as If-Match, is missing.
When a precondition header is not matching the server side state, the
response should be 412 Precondition Failed.
Status
http
428 Precondition Required
Specifications
| Specification |
|---|
| RFC 6585 # section-3 |