[1] DUPLICITY(1) manual page ( 版) http://duplicity.nongnu.org/duplicity.1.html#sect7

WebDAV

webdav[s]://user[:password]@other.host[:port]/some_dir

alternatively try lftp+webdav[s]://

[2] RFC 4709 - Mounting Web Distributed Authoring and Versioning (WebDAV) Servers () https://tools.ietf.org/html/rfc4709#appendix-A.2

The "kio" library of the "K Desktop Enviroment"

(http://www.kde.org/) uses the URI scheme "webdav" to dispatch to

the system's WebDAV client. This URI scheme is not registered, nor

is it supported on other platforms. Furthermore, the W3C's

"Architecture of the World Wide Web, Volume One" explicitly advises

against defining new schemes when existing schemes can be used:

A specification SHOULD reuse an existing URI scheme (rather than

create a new one) when it provides the desired properties of

identifiers and their relation to resources.

(See [WEBARCH], Section 2.4.)