Frequently Asked Questions

What is WebDAV?

WebDAV is a network filesystem protocol. You can compare it to for windows networking, FTP, SFTP. The WebDAV protocol is supported natively by Microsoft Windows, OS/X and pretty much any Linux distribution.

WebDAV is a protocol that sits on top of the HTTP protocol, because of this it also works often through corporate firewalls.

See Wikipedia or for more information.

What is SabreDAV?

SabreDAV is a WebDAV server completely built in PHP. This means all you need to enable WebDAV access to your Web server is PHP.

What is CalDAV?

CalDAV is a standard that is built on top of WebDAV. CalDAV is used for calendar-syncing, and all kinds of other calendar-related storage. It is supported by a lot of popular calendaring applications.

Wikipedia has a lot more information about this.

What is CardDAV?

What CalDAV does for calendars, CardDAV does for address books. CardDAV is the standard protocol to manage and sync addressbooks, and is also supported by a lot of clients and services.

Check Wikipedia for more info.

Is SabreDAV stable?

SabreDAV has been deployed by live applications since 2007, and more than 98% of the code is covered by unittests. It is currently in use by multiple corporations. The largest installations manage addressbooks and calendars for millions of users.

No software is bugfree though, but SabreDAV is actively maintained, so if anything pops up we're usually quick to respond.

Why would I use SabreDAV instead of Apache's mod_dav?

If mod_dav does what you need, you probably don't need SabreDAV. SabreDAV is intended as an easily programmable webdav server. SabreDAV supports more clients and also does Cal- and CardDAV, whereas mod_dav does not

If you don't have a need for those features, mod_dav is likely a better choice as it's not written in PHP, and likely faster.

It doesn't work!

DAV is tricky to debug, because unlike with building web applications, there is no browser that simply shows you useful error messages.

The first step you should make, is to use the browser plugin. This plugin creates directory indexes, and will allow you to browse around using your standard webbrowser. If you're already seeing errors there, it may give away quickly where your problem is.

It's also recommended to keep an eye on the error log.

Failing that, we highly recommend setting up Charles HTTP Proxy. This tool is pretty much running for us 24/7. Whenever we run into any issue this is where we start debugging.

If you're still running into issues, contact us on the mailing list, or open an issue on github.

Authentication doesn't work

There are several server configurations that can affect whether authentication will work. The Authentication and Webservers wiki pages have more info.

Which clients are supported?

Almost every client we've gotten our hands on fully work, but for some there may be some caveats, of you may be required to upgrade to a later version.

Check out the Client list to get more infromation about a specific client. If you're running into issues with a specific client, we would love to hear it so we can see if we can devise a workaround, or at least document the behavior.

Does SabreDAV pass the litmus test?

Litmus is a handy tool that helps you test your WebDAV server for all standard features. The current status of the litmus test can be found on the Litmus page.

Can SabreDAV work with large files?

Yes, read Working with large files.

Does SabreDAV work with Microsoft Outlook?

Outlook does not support CalDAV, and therefore it is also not possible to sync with SabreDAV (or any other CalDAV implementation).

There's a few plugins though that add this functionality to outlook:

Bynari WebDAV collaborator is a very active, non-free plugin for outlook. It works well with SabreDAV and syncs contacts, calendars and tasks.

iCal4OL is another (non-free, but it has a trial). I have personally not tested it so if it worked with SabreDAV, but we have had good reports.

Open Connector is a free plugin for Outlook that is supposed to provide support for this, but the project appears unmaintained since 2008, and I personally haven't gotten it to work. If you did, let me know how.

I'm getting 0-byte files on the server

Read 0 bytes.

How can I help?

We're definitely short on people. If you'd like to contribute, here are some areas we could use some help with:

SabreDAV is now developed at fruux, for the last two items in this list it would be best to contact us to help you further.

I have a different question

Hit us up on the mailing list.

I'd like to get commercial support

SabreDAV is developed by fruux. If you're looking for enterprise-level support, we'd love to hear from you!