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 Ical HowTo using Sunbird or Thunderbird/Lightning with working free/busy
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*Note: This is not an official Horde document. There is no write support in Horde 3.1/Kronolith 2.1*

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This document is intended to help administrators configure various parts of horde to link a calendar application with Kronolith. Please feel free to fill in any gaps or to clarify any existing information presented here.

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 Document Standards
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In this document, we assume the following:

* The latest stable version of Horde and Kronolith.

* A working version of Horde and Kronolith.

* A working version of Sunbird or Thunderbird/Lightning extension.

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 On debian
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* Install php pear package as follow:

::

 apt-get install php4-pear


You can also use php5 package.--------------------
 HTTP_WebDAV_Server
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Then to make sure pear is working:
::

 pear config-show

You now need to install the pear HTTP_WebDAV_Server package
::

 pear install HTTP_WebDAV_Server-beta

* Adjust your apache config if necessary.

We found that Sunbird was taking roughly 20 seconds to download the ics file over webdav and that even downloading the file in a browser had the same lag.  On investigation it turned out Kronolith was taking about 3 seconds to generate the file and Sunbird was waiting 15 seconds for the connection to close after downloading the file.  Turning off KeepAlive in apache.conf (or setting it to a very small value) solved this issue.  The default is 15 seconds.

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 Test it
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Launch your Sunbird or Lightning application.

* Go to calendar

* New ->

* On the Network -> iCalendar

https://yourhost/yourhordepath/rpc.php/kronolith/YOUR-HORDE-USERNAME.ics

15/05/08: Starting with Horde Webmail 1.1 RC4, and as pointed out in `that thread`_, this URL has to be changed like below:
https://yourhost/yourhordepath/rpc.php/kronolith/YOUR-HORDE-USERNAME/YOUR-HORDE-USERNAME.ics

.. _`that thread`: http://thread.gmane.org/gmane.comp.horde.kronolith/4555

It should ask you for user and password.

Then you should see you calendar and be able to edit events in both Sunbird/Lightning and Kronolith.

I can read my calendar perfectly but not publish. My apache returns a 404 or 403.

Then it should work according to this:
http://lists.horde.org/archives/kronolith/Week-of-Mon-20060130/005859.html

Check also, whether the Apache config allows the PUT method. You should have something similar to
::

         <Directory /home/www/cal>
           <LimitExcept GET POST OPTIONS PROPFIND PUT>
             Order deny,allow
             deny from all
           </LimitExcept>
         </Directory> 

where /home/www/cal would be the directory under which horde is installed, in your Apache config.

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 Free/busy
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Free/busy Lightning extension is able to correctly read Horde freebusy file.

-------
 Notes
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* 26/03/08: With Lightning v0.7 and Horde Webmail 1.1RC3, reading and publishing works correctly with a remote calendar as described on this page.
 * This does work very nicely with sunbird 0.7 and kronolith 2.2, you must select ical (not webdav) but you do get two way editing.
 * 2011-11-23: Using SME Server 8b6, with smeserver-kronolith and kronolith-h3 installed (kronolith v2.3), and the pear additions from above, works fine with Thunderbird 8.0 and Lightning 1.0 -- paul dot warren at wollemisystems dot com

2012-06-07

I have found the Solution!

this link has helped me http://lists.freebsd.org/pipermail/freebsd-ports-bugs/2011-July/214620.html

you have to install the pear-HTTP_WebDAV_Server

but it installed in the /usr/share/php dir

you must copy following files to your /usr/share/psa-pear folder, then you can write in your calendar form thunderbird or outlook

/HTTP/WebDAV/  to your psa-pear dir  (i think you must copy more than this dir) but it works

yourserer.com/rpc.php/kronolith/<yourid>/<yourid>.ics

Thunderbird ask you for a webdav authentification

Have fun

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To get better Performance with more Than 20 Calendars, dturn KeepAlive Off on your Apache serverso the loading on Mailclient should be much faster