The plugin only supports basic authentication and fails on Digest Authentication for Webdav

[rossbu]

if there can be a support and add-on plugin with RFC 4918 standard, and for lib/rfc2518 , which is Obsoleted by: 4918 referenced from https://tools.ietf.org/html/rfc2518#page-40 ( link text on top)

[millercl]

Thank you for pointing out RFC4918; this will be consulted henceforth. gulp-webdav-sync does not implement either standard in full. Some functions and test cases take their name from RFC2518. Please file another issue if you wanted a specific feature from RFC4918. RFC2518 already requires HTTP digest authentication.

v2.0.0 supports HTTP digest authentication via request. Please update via npm, and refer to the documentation regarding changes to the options format.

[millercl]

Request's digest authentication doesn't work with PUT: request/request#2375. gulp-webdav-sync creates empty files.