All WebDAV clients fall into one of three categories—standalone applications, file-explorer extensions, or filesystem implementations. These categories broadly define the types of WebDAV functionality available to users. Table C.1, “Common WebDAV Clients” gives our categorization and a quick description of some common pieces of WebDAV-enabled software. More details about these software offerings, as well as their general category, can be found in the sections that follow.
Table C.1. Common WebDAV Clients
|Adobe Photoshop||Standalone WebDAV applications||Image editing software, allowing direct opening from, and writing to, WebDAV URLs|
|Cadaver||Standalone WebDAV applications||Command-line WebDAV client supporting file transfer, tree, and locking operations|
|DAV Explorer||Standalone WebDAV applications||GUI tool for exploring WebDAV shares|
|davfs2||WebDAV filesystem implementation||Linux file system driver that allows you to mount a WebDAV share|
|GNOME Nautilus||File-explorer WebDAV extensions||GUI file explorer able to perform tree operations on a WebDAV share|
|KDE Konqueror||File-explorer WebDAV extensions||GUI file explorer able to perform tree operations on a WebDAV share|
|Mac OS X||WebDAV filesystem implementation||Operating system with built-in support for mounting WebDAV shares locally|
|Macromedia Dreamweaver||Standalone WebDAV applications||Web production software able to directly read from and write to WebDAV URLs|
|Microsoft Office||Standalone WebDAV applications||Office productivity suite with several components able to directly read from and write to WebDAV URLs|
|Microsoft Web Folders||File-explorer WebDAV extensions||GUI file explorer program able to perform tree operations on a WebDAV share|
|Novell NetDrive||WebDAV filesystem implementation||Drive-mapping program for assigning Windows drive letters to a mounted remote WebDAV share|
|SRT WebDrive||WebDAV filesystem implementation||File transfer software which, among other things, allows the assignment of Windows drive letters to a mounted remote WebDAV share|
A WebDAV application is a program which contains built-in functionality for speaking WebDAV protocols with a WebDAV server. We'll cover some of the most popular programs with this kind of WebDAV support.
On Windows, there are several well-known applications that contain integrated WebDAV client functionality, such as Microsoft's Office,  Adobe's Photoshop, and Macromedia's Dreamweaver programs. They're able to directly open and save to URLs, and tend to make heavy use of WebDAV locks when editing a file.
Note that while many of these programs also exist for the Mac OS X, they do not appear to support WebDAV directly on that platform. In fact, on Mac OS X, thedialog box doesn't allow one to type a path or URL at all. It's likely that the WebDAV features were deliberately left out of Macintosh versions of these programs, since OS X already provides such excellent low-level filesystem support for WebDAV.
Cadaver is a bare-bones Unix commandline program for browsing and changing WebDAV shares. Like the Subversion client, it uses the neon HTTP library—not surprisingly, both neon and cadaver are written by the same author. Cadaver is free software (GPL license) and is available at http://www.webdav.org/cadaver/.
Using cadaver is similar to using a commandline FTP program, and thus it's extremely useful for basic WebDAV debugging. It can be used to upload or download files in a pinch, and also to examine properties, copy, move, lock or unlock files:
$ cadaver http://host/repos dav:/repos/> ls Listing collection `/repos/': succeeded. Coll: > foobar 0 May 10 16:19 > playwright.el 2864 May 4 16:18 > proofbypoem.txt 1461 May 5 15:09 > westcoast.jpg 66737 May 5 15:09 dav:/repos/> put README Uploading README to `/repos/README': Progress: [=============================>] 100.0% of 357 bytes succeeded. dav:/repos/> get proofbypoem.txt Downloading `/repos/proofbypoem.txt' to proofbypoem.txt: Progress: [=============================>] 100.0% of 1461 bytes succeeded.
DAV Explorer is another standalone WebDAV client, written in Java. It's under a free Apache-like license and is available at http://www.ics.uci.edu/~webdav/. DAV Explorer does everything cadaver does, but has the advantages of being portable and being a more user-friendly GUI application. It's also one of the first clients to support the new WebDAV Access Control Protocol (RFC 3744).
Of course, DAV Explorer's ACL support is useless in this
case, since mod_dav_svn doesn't support it. The fact that
both Cadaver and DAV Explorer support some limited DeltaV
commands isn't particularly useful either, since they don't
MKACTIVITY requests. But it's not
relevant anyway; we're assuming all of these clients are
operating against an autoversioning repository.
Some popular file explorer GUI programs support WebDAV extensions which allow a user to browse a DAV share as if it was just another directory on the local computer, and allowing basic tree editing operations on the items in that share. For example, Windows Explorer is able to browse a WebDAV server as a “network place”. Users can drag files to and from the desktop, or can rename, copy, or delete files in the usual way. But because it's only a feature of the file-explorer, the DAV share isn't visible to ordinary applications. All DAV interaction must happen through the explorer interface.
Microsoft was one of the original backers of the WebDAV specification, and first started shipping a client in Windows 98, known as “Web Folders”. This client was also shipped in Windows NT4 and 2000.
The original Web Folders client was an extension to Explorer, the main GUI program used to browse filesystems. It works well enough. In Windows 98, the feature might need to be explicitly installed if Web Folders aren't already visible inside “My Computer”. In Windows 2000, simply add a new “network place”, enter the URL, and the WebDAV share will pop up for browsing.
With the release of Windows XP, Microsoft started shipping
a new implementation of Web Folders, known as the “WebDAV
mini-redirector”. The new implementation is a
filesystem-level client, allowing WebDAV shares to be mounted
as drive letters. Unfortunately, this implementation is
incredibly buggy. The client usually tries to convert http
http://host/repos) into UNC share
\\host\repos); it also often
tries to use Windows Domain authentication to respond to
basic-auth HTTP challenges, sending usernames as
HOST\username. These interoperability
problems are severe and documented in numerous places around
the web, to the frustration of many users. Even Greg Stein,
the original author of Apache's WebDAV module, recommends
against trying to use XP Web Folders against an Apache
It turns out that the original “Explorer-only” Web Folders implementation isn't dead in XP, it's just buried. It's still possible to find it by using this technique:
Go to 'Network Places'.
Add a new network place.
When prompted, enter the URL of the repository, but
include a port number in the URL.
http://host/repos would be
Respond to any authentication prompts.
There are a number of other rumored workarounds to the problems, but none of them seem to work on all versions and patchlevels of Windows XP. In our tests, only the previous algorithm seems to work consistently on every system. The general consensus of the WebDAV community is that you should avoid the new Web Folders implementation and use the old one instead, and that if you need a real filesystem-level client for Windows XP, then use a third-party program like WebDrive or NetDrive.
A final tip: if you're attempting to use XP Web Folders, make sure you have the absolute latest version from Microsoft. For example, Microsoft released a bug-fixed version in January 2005, available at http://support.microsoft.com/?kbid=892211. In particular, this release is known to fix a bug whereby browsing a DAV share shows an unexpected infinite recursion.
Nautilus is the official file manager/browser for the GNOME desktop (http://www.gnome.org), and Konqueror is the manager/browser for the KDE desktop (http://www.kde.org). Both of these applications have an explorer-level WebDAV client built-in, and operate just fine against an autoversioning repository.
In GNOME's Nautilus, from the, select and enter the URL. The repository should then be displayed like any other filesystem.
In KDE's Konqueror, you need to use the
webdav:// scheme when entering the URL in
the location bar. If you enter an
URL, Konqueror will behave like an ordinary web browser.
You'll likely see the generic HTML directory listing produced
by mod_dav_svn. By entering
webdav://host/repos instead of
http://host/repos, Konqueror becomes a
WebDAV client and displays the repository as a
The WebDAV filesystem implementation is arguably the best sort of WebDAV client. It's implemented as a low-level filesystem module, typically within the operating system's kernel. This means that the DAV share is mounted like any other network filesystem, similar to mounting an NFS share on Unix, or attaching an SMB share as drive-letter in Windows. As a result, this sort of client provides completely transparent read/write WebDAV access to all programs. Applications aren't even aware that WebDAV requests are happening.
Both WebDrive and NetDrive are excellent commercial products which allow a WebDAV share to be attached as drive letters in Windows. We've had nothing but success with these products. At the time of writing, WebDrive can be purchased from South River Technologies (http://www.southrivertech.com). NetDrive ships with Netware, is free of charge, and can be found by searching the web for “netdrive.exe”. Though it is freely available online, users are required to have a Netware license. (If any of that sounds odd to you, you're not alone. See this page on Novell's website: http://www.novell.com/coolsolutions/qna/999.html)
Apple's OS X operating system has an integrated
filesystem-level WebDAV client. From the Finder, select the
filesystem type with the mount command:
$ mount -t webdav http://svn.example.com/repos/project /some/mountpoint $
Note that if your mod_dav_svn is older than version 1.2, OS X will refuse to mount the share as read-write; it will appear as read-only. This is because OS X insists on locking support for read-write shares, and the ability to lock files first appeared in Subversion 1.2.
One more word of warning: OS X's WebDAV client can
sometimes be overly sensitive to HTTP redirects. If OS X is
unable to mount the repository at all, you may need to enable
the BrowserMatch directive in the Apache server's
BrowserMatch "^WebDAVFS/1." redirect-carefully
Linux davfs2 is a filesystem module for the Linux kernel, whose development is located at http://dav.sourceforge.net/. Once installed, a WebDAV network share can be mounted with the usual Linux mount command:
$ mount.davfs http://host/repos /mnt/dav
 WebDAV support was removed from Microsoft Access for some reason, but exists in the rest of the Office suite.