http 505 HTTP Version Not Supported

5×× Server Error

505 HTTP Version Not Supported

The server does not support, or refuses to support, the major version of HTTP that was used in the request message.
The server is indicating that it is unable or unwilling to complete the request using the same major version as the client, as described in Section 2.6 of RFC7230, other than with this error message. The server SHOULD generate a representation for the 505 response that describes why that version is not supported and what other protocols are supported by that server.

• Source: RFC7231 Section 6.6.6

505 Code References

Rails HTTP Status Symbol :http_version_not_supported
Go HTTP Status Constant http.StatusHTTPVersionNotSupported
Symfony HTTP Status Constant Response::HTTP_VERSION_NOT_SUPPORTED
Python2 HTTP Status Constant httplib.VERSION_NOT_SUPPORTED
Python3 HTTP Status Constant http.client.VERSION_NOT_SUPPORTED
Python3.5 HTTP Status Constant http.HTTPStatus.VERSION_NOT_SUPPORTED