RFC2068, 14.25: If none of the entity tags match, or if "*" is given and no current entity exists, the server MUST NOT perform the requested method, and MUST return a 412 (Precondition Failed) response.
This function launches an error
Returns the result of the LDAP query
Check the username / password against the IMAP server
Accessor for the read proxy group
Render XML for a single Principal (user) from the DB
The raw data sent along with the request
Render XML for this resource
Returns the database row for this resource
Return general server-related properties for this URL
Returns the definitive resource_id for this resource - usually a dav_id