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.


505 Code References

  • .NET HTTP Status Enum HttpStatusCode.HttpVersionNotSupported
  • Rust HTTP Status Constant http::StatusCode::HTTP_VERSION_NOT_SUPPORTED
  • 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
HTTP Status Codes