404 Not Found
The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
A 404 status code does not indicate whether this lack of representation is temporary or permanent; the 410 Gone status code is preferred over 404 if the origin server knows, presumably through some configurable means, that the condition is likely to be permanent.
A 404 response is cacheable by default; i.e., unless otherwise indicated by the method definition or explicit cache controls1.
- 1 Calculating Heuristic Freshness RFC7234 Section 4.2.2
- Source: RFC7231 6.5.4
404 Code References
-
.NET HTTP Status Enum
HttpStatusCode.NotFound -
Rust HTTP Status Constant
http::StatusCode::NOT_FOUND -
Rails HTTP Status Symbol
:not_found -
Go HTTP Status Constant
http.StatusNotFound -
Symfony HTTP Status Constant
Response::HTTP_NOT_FOUND -
Python2 HTTP Status Constant
httplib.NOT_FOUND -
Python3+ HTTP Status Constant
http.client.NOT_FOUND -
Python3.5+ HTTP Status Constant
http.HTTPStatus.NOT_FOUND
