Apache does WebDAV out of the box, while Lighttpd needs the mod_webdav module to support WebDAV, and it still has some rough edges. For example, Window users will find that their mod_auth login does not work when they activate WebDAV; this can be compensated by a cookie-based login. Oh, and we need to have webdav support configured at compile time, if we built our Lighttpd from source. The configuration, as always, is pretty straightforward:

server.modules += ( "mod_webdav" )
# activate WebDAV for the server "dav.my.net"
$HTTP["host"] == "dav.my.net" {
webdav.activate = "enable"
# enable writing for members only (identify by sess cookie)
$HTTP["cookie"] !~ "sess" {
$HTTP["url"] =~ "^/members/" {
webdav.is-readonly = "enable"
}
}
}

The important directives here are webdav.activate and webdav.is-readonly. The former activates WebDAV, if we set it to enable. Otherwise, WebDAV is deactivated by default. The latter forbids operations that modify files on the server (PUT and DELETE), and...