Apparently the whole PROPFIND / and Apache proxy things were red herrings. The central issue seems to be that MS Web Folders doesn't know what to do with a 401 Unauthorized response to an OPTIONS request on the WebDAV root folder (when it finally gets around to checking). I reconfigured my WebDAV servlet to bypass authorization for OPTIONS requests (as a test), and once MS Web Folders requested OPTIONS and my servlet sent them back, it issued a PROPFIND and correctly popped up the authorization dialog. (But there are more problems---see below.)
This seems to be related:
http://support.microsoft.com/?kbid=831805
So... if I put workarounds in my WebDAV servlet to work with MS Web Folders from XP SP2, will it still fail with XP SP1, because SP1 won't even send an OPTIONS except to the root?
http://greenbytes.de/tech/webdav/webdav-redirector-list.html
I wrote *my* WebDAV servlet reading from the RFCs. What in the world did MS coders use when they wrote MS Web Folders? Surely not the actual WebDAV specification...
This is all just plain ridiculous.
Garret
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