Xandikos is a CardDAV/CalDAV server that backs onto a Git repository.

Xandikos (Ξανδικός or Ξανθικός) takes its name from the name of the March month in the ancient Macedonian calendar, used in Macedon in the first millennium BC.

Implemented standards

The following standards are implemented:

• RFC4918/RFC2518 (Core WebDAV) - implemented, except for COPY/MOVE/LOCK operations
• RFC4791 (CalDAV) - fully implemented
• RFC6352 (CardDAV) - fully implemented
• RFC5397 (Current Principal) - fully implemented
• RFC3253 (Versioning Extensions) - partially implemented, only the REPORT method and {DAV:}expand-property property
• RFC3744 (Access Control) - partially implemented
• RFC5995 (POST to create members) - fully implemented
• RFC5689 (Extended MKCOL) - fully implemented

The following standards are not implemented:

• RFC6638 (CalDAV Scheduling Extensions) - not implemented
• RFC7809 (CalDAV Time Zone Extensions) - not implemented
• RFC7529 (WebDAV Quota) - not implemented
• RFC4709 (WebDAV Mount) - not implemented
• RFC5546 (iCal iTIP) - not implemented
• RFC4324 (iCAL CAP) - not implemented
• RFC7953 (iCal AVAILABILITY) - not implemented

See DAV compliance for more detail on specification compliancy.

Limitations

• No multi-user support
• No support for CalDAV scheduling extensions

Supported clients

Xandikos has been tested and works with the following CalDAV/CardDAV clients:

• vdirsyncer
• caldavzap/carddavmate
• evolution
• davdroid
• sogo connector for Icedove/Thunderbird
• aCALdav syncer for Android
• pycardsyncer
• akonadi

CalDAV/CardDAV clients that are known not to work:

• CalDAV-Sync
• CardDAV-Sync

Dependencies

At the moment, Xandikos supports Python 3.3 and higher as well as Pypy 3. It also uses dulwich, jinja2, icalendar, and defusedxml.

E.g. to install those dependencies on Debian:

sudo apt install python3-dulwich python3-defusedxml python3-icalendar python3-jinja2

Or to install them using pip:

python setup.py develop

Running

Testing

To run a standalone (low-performance, no authentication) instance of Xandikos, with a pre-created calendar and addressbook (storing data in $HOME/dav):

./bin/xandikos --defaults -d $HOME/dav

A server should now be listening on localhost:8080.

Note that Xandikos does not create any collections by default. You can either create collections from your CalDAV/CardDAV client, or by creating git repositories under the contacts or calendars directories it has created.

Production

The easiest way to run Xandikos in production is using uWSGI.

One option is to setup uWSGI with a server like Apache, Nginx or another web server that can authenticate users and forward authorized requests to Xandikos in uWSGI. See examples/uwsgi.ini for an example uWSGI configuration.

Alternatively, you can run uWSGI standalone and have it authenticate and directly serve HTTP traffic. An example configuration for this can be found in examples/uwsgi-standalone.ini.

This will start a server on localhost:8080 with username user1 and password password1.

mkdir -p $HOME/dav
uwsgi examples/uwsgi-standalone.ini

Help

There is a #xandikos IRC channel on the Freenode IRC network, and a xandikos mailing list.

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