Response codes

204 No Content
The server has fulfilled the request but does not need to return an entity-body, and might want to return updated metainformation.

207 Multi-Status [WebDav]
A typical successful response.

226 IM Used
A http 1.1 header: This is a delta encoded reponse

412 Precondition Failed
In webdav this means the destination resource aleady exists.

418 I'm a teapot
The HTCPCP server is a teapot. The responding entity MAY be short and stout. Defined by the April Fools specification RFC 2324. See Hyper Text Coffee Pot Control Protocol for more information.

422 Unprocessable Entity [WebDAV]
This means that the XML was valid, but the server was unable to process it. Possibly due to unsupport search range.