510 Not Extended
The HTTP 510 Not Extended
server error response status code is sent when the client request declares an HTTP Extension (RFC 2774) that should be used to process the request, but the extension is not supported.
Status
http
510 Not Extended
Examples
Extension not supported
In the following example, a client sends a request with a mandatory extension specified in the C-MAN
header.
The Connection
header specifies that these extensions are to be handled on a hop-by-hop basis.
A proxy forwards the extended request, but the Connection
header is stripped out in transit.
Because the origin server doesn't receive any information about the M-GET
method, it sends a 510
in response:
http
M-GET /document HTTP/1.1
Host: example.com
C-Man: "https://www.example.org/"
Connection: C-Man
http
HTTP/1.1 510 Not Extended
Specifications
Specification |
---|
RFC 2774 # section-7 |