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Re: Subversion Autoversioning, WebDAV, and Windows XP

From: Julian Reschke <julian.reschke_at_gmx.de>
Date: 2005-04-23 11:09:01 CEST

Karl,

you need to distinguish between the different WebDAV clients Windows
comes with.

The "Webfolder" client has been introduced many years ago, and has been
shipping with Windows, Office and some IE releases (?). This is

- a Windows shell extension, plus
- hooks in IE ("open as webfolder", "folder" CSS behaviour, see
<http://msdn.microsoft.com/workshop/author/behaviors/reference/behaviors/anchor.asp>),
plus
- a data provider DLL (used by the shell extension and some applications
such as Office).

Known versions and bugs for this client are collected at
<http://greenbytes.de/tech/webdav/webfolder-client-list.html> (feedback
and more data appreciated).

Windows XP has introduced an entirely new WebDAV client, the "WebDAV
Mini-Redirector" (summary at
<http://greenbytes.de/tech/webdav/webdav-redirector-list.html>) which
essentially is a file system driver mapping to a WebDAV server. This has
a lot advantages (it can be used by any client that can access the file
system), many disadvantages (for instance, it's inefficient compared to
clients optimized to use the older libraries); and it's full of (known)
bugs (these bugs prevent the client from working with our own (SAP)
server, thus I have only done very limited testing with it; as far as I
know, Microsoft is not planning to fix any of these issues before Longhorn).

So in general I would advise to

1) get the latest Webfolder client code
(<http://support.microsoft.com/?kbid=892211>) and

2) to try not to use the "new" WebDAV mini-redirector.

There seem to be at least two ways to avoid that one:

- disable the mini-redirector (you may want to try
<http://archives.neohapsis.com/archives/sf/ms/2002-q2/0495.html>), or

- always use the browser to open the web folder (File/Open/"Open as
Webfolder") or through the aforementioned CSS behaviour.

Note that there's a plugin that adds equivalent Webfolder hooks to
Mozilla Firefox, so it may make sense that the HTML generated by
Subversion for folder listings actually use that CSS stuff
(<http://openwebfolder.mozdev.org/>).

Best regards, Julian

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Received on Sat Apr 23 11:12:16 2005

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