Abstract. This document defines extensions to the Web Distributed Authoring and Versioning (WebDAV) protocol to specify a standard way of accessing. Calendaring Extensions to WebDAV, or CalDAV, is an Internet standard allowing a client to access scheduling information on a remote. This page is intended for individuals who wish to develop a CalDAV or WebDAV (RFC ) – minus sections 5, 6, , (few CalDAV clients seem to.

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This section needs additional citations for verification. Technically, a server may support ‘sync’ on one calendar, and it may not support it on another, although this is probably rare. Even though a number appears in the url, you are not allowed to attach any meaning to that url.

On this url you can request additional information about the user. In an ideal world changes are submitted to the server the very instant that the user has made them. In this case it may be needed to do a full-sync again. One thing in which CalDAV differs from some other synchronization models, is that the ‘truth’ is always on the server.

Building a CalDAV client

Every time the ctag has changed, you know something in the calendar has changed too. This has a lot of advantages.

What we need from this url, is their ‘calendar home’. The last response reported two changes: Many server and client applications support the protocol. Other items may be returned, including non- calendar, which your application should ignore. There’s no way to tell from the response wether calfav calendar objects got created or updated, you, as a client can only infer this based on the objects you are already aware of.


An example of this is Thunderbird Lightning. The process on a high-level is as follows:. Note that this last request is extremely similar to a previous one, but rff are only asking for the etag, not the calendar-data. It rgc should be a url. Every single event and task is encoded as an iCalendar object.

If you read this far and understood what’s been said, you may have realized that it’s a bit cumbersome to have a separate step for the initial sync, and subsequent updates.

From Wikipedia, the free encyclopedia. The calendar home is a collection that contains all of the users’ calendars. This too is often the case, but again not something you can rely on, so don’t make any assumptions. Caldzv article needs additional citations for verification. The displayname is a human-readable string for the calendarname, the ctag was already covered in an earlier section.

WebDAV-Sync allows a client to ask just for calendars that have changed. The url that’s being returned, is a url that refers to the current user. Archived from the original on The best user interface would be to just have to ask for three items:.


Many requests return an xml document rtc this exact format, so it is worthwhile writing a standard parser.

So based on those 3 items we know that we need to delete an object from our local list, and fetch the contents for the new item, and the updated one. CalDAV is designed for implementation by any collaborative software cwldav, client or server, that needs to maintain, access or share collections of events.

CalDAV – Wikipedia

This ctag works like a change id. The transmitted xml bodies can generally be a lot shorter, and is also easier on both client and server in terms of memory and CPU usage, because only a limited set of items will have to be compared. WebDAV-Sync is a protocol extension that is defined in rfc Retrieved from ” https: This document is a general howto on how to build a CalDAV client. The access protocol is defined by RFC The document is language-agnostic, and considering the massive scope of CalDAV, not complete.

This requests all the changes since sync-token identified by http: It’s important to note, that a client should only do Sync operations, if the server reports that it has support for it. In this case all urls ended with.

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