[Building Sakai] How to CASifying WebDAV access

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Dear all,

According to [1], I sucessfuly made the Sakai work with CAS. Yet, the
WebDAV still use the internal password to authorize user.

May be I can modify the org.sakaiproject.dav.DavServlet, but I think
it's ugly to do so.

Is there any good idear to make WebDAV work with CAS?


[1]
https://confluence.sakaiproject.org/display/~steve.swinsburg/CASifying+Sakai+with+CAS+3

-- 
Gao Jun
Fudan University