did you know you can configure mod_dav to allow read-only access to your webdav share (apart from the usual read-write access)? all you need is set “Options Indexes”, point your browser to the webdav url and enter your credentials. basically, i have the following mod_dav configuration:
BrowserMatch “^WebDAVFS/1.” redirect-carefully
BrowserMatch “Microsoft Data Access Internet Publishing Provider” redirect-carefully
BrowserMatch “Microsoft-WebDAV-MiniRedir/5.1.2600” redirect-carefully
BrowserMatch “^WebDrive” redirect-carefully
BrowserMatch “^WebDAVFS” redirect-carefully
LoadModule dav_module modules/mod_dav.so
LoadModule dav_fs_module modules/mod_dav_fs.so
AuthName “Please enter your webshare credentials”
Require user johndoe
i had to remove <Limit> restrictions as basic auth didn’t work with it for some reason. configuring a share that can be both accessed (read-write) using samba/smb/cifs and webdav is a bit more tricky and depends on which linux distribution you use. in a nutshell, you need to fiddle with directory permissions (especially the “sgid – set group id” bit) and figure out which setting works best (and the most securely) for you.
note that for security reasons, you should only allow encrypted http access (https using tls/ssl) to your share (see the <Redirect> option for example).
 in gentoo, edit /etc/apache2/conf/modules.d/45_mod_dav.conf
(thanks to flo for the tip)