HTTP Status Code 428-Precondition Required is one of the classes of 4xx(Server Error) response code that indicates the server expects conditionality in the request.
This usually indicates the absence of a needed precondition header, such as If-Match.
The answer should be 412 Precondition Failed if a precondition header does not match the server-side status.
It’s useful to employ conditional requests using the If-Match, If-None-Match, If-Modified-Since, and If-Unmodified-Since headers to avoid multiple users writing to the same resources and overwriting each other’s modifications.
These headers, on the other hand, are opt-in.
A server can return 428 Precondition Required if it wishes to compel a client to utilize them.
Clients who are compelled to use Etags and preconditions are less likely to overwrite modifications because they are obliged to examine the existing state of the service before making a change.
|428 Precondition Required|
|HTTP Status Code 204 – No Content|
|HTTP Status Code 300-Multiple Choices|
|HTTP Status Code 302 Found|
|HTTP Status Code 207 Multi-Status|
What do you mean by HTTP Status Code 428-Precondition Required?
HTTP Status Code 428-Precondition Required is one of the classes of 4xx(Server Error) response code that indicates the server expects conditionality in the request
|RFC 6585, section 3: 428 Precondition Required||Additional HTTP Status Codes|
428 CODE REFERENCES
|Symfony HTTP Status Constant||Response::HTTP_PRECONDITION_REQUIRED|
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