HTTP 204 status code

The server successfully processed the request, but does not need to return any entity content, and hopes to return updated meta information. The response may return new or updated metainformation in the form of entity headers. These headers, if present, should correspond to the requested variables.

If the client is a browser, the user's browser should retain the page that sent the request without causing any changes to the document view, even if the new or updated meta information should be Applies to the document in the active view of the user's browser.

Since a 204 response is prohibited from containing any message body, it always ends with the first empty line after the message header.