I don't even buy that this is Kronolith at all. We always send the 
HTTP authentication header, this rather looks like a client trying an 
unauthenticated request first, and only then sending the 
authentication informations. Apple clients do this for example.

We cannot simply encode the URL entered by the user. Because if it's 
*not* properly encoded, it's already an invalid URL. And if he 
provides a correctly encoded URL, we would double-encode it.
We should check if the entered URL is valid though before saving it.
And I still wonder why this redirection happens with invalid URLs.

sorry for so much noise, its late =|

the space in the url causes the error adding it with
http:/..../default%20calendar
let the eventsdetails appear, so this should be properly urlencoded

i think it happens if the caldav url doesn't end with a slash

http://192.168.1.99/owncloud/apps/calendar/caldav.php/calendars/user/default 
calendar
versus
http://192.168.1.99/owncloud/apps/calendar/caldav.php/calendars/user/default 
calendar/

please always add a trailing slash to it, the events are readable then 
(correct urls generated)
thanks!

i added the browser to the logfile: only the last request is actually 
from my browser (firefox), does this help?

192.168.1.99 - - [20/Feb/2012:15:01:22 +0100] "OPTIONS 
/owncloud/apps/calendar/caldav.php/calendars/simon/default calendar/ 
HTTP/1.1" 401 291 "-" "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 
5.0)"
192.168.1.99 - simon [20/Feb/2012:15:01:22 +0100] "OPTIONS 
/owncloud/apps/calendar/caldav.php/calendars/simon/default%20calendar/ 
HTTP/1.1" 200 - "-" "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 
5.0)"
192.168.1.99 - - [20/Feb/2012:15:01:23 +0100] "PROPFIND 
/owncloud/apps/calendar/caldav.php/calendars/simon/default calendar/ 
HTTP/1.1" 401 291 "-" "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 
5.0)"
192.168.1.99 - simon [20/Feb/2012:15:01:23 +0100] "PROPFIND 
/owncloud/apps/calendar/caldav.php/calendars/simon/default%20calendar/ 
HTTP/1.1" 207 1242 "-" "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 
5.0)"
192.168.1.99 - - [20/Feb/2012:15:01:23 +0100] "GET 
/owncloud/apps/calendar/caldav.php/calendars/simon/default 
calendar/owncloud/apps/calendar/caldav.php/calendars/simon/default%20calendar/860a9db6-b4b2-4d59-b402-2d321ad119da.ics HTTP/1.1" 401 291 "-" "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 
5.0)"
192.168.1.99 - simon [20/Feb/2012:15:01:23 +0100] "GET 
/owncloud/apps/calendar/caldav.php/calendars/simon/default%20calendar/owncloud/apps/calendar/caldav.php/calendars/simon/default%20calendar/860a9db6-b4b2-4d59-b402-2d321ad119da.ics HTTP/1.1" 404 270 "-" "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 
5.0)"
192.168.1.99 - - [20/Feb/2012:15:01:22 +0100] "POST 
/horde/services/ajax.php/kronolith/getEvent HTTP/1.1" 200 145 
"http://192.168.1.99/horde/kronolith/" "Mozilla/5.0 (X11; Linux 
x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1"

d-partment horde # git status
# On branch master
# Changed but not updated:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#       modified:   horde/config/registry.php
#       modified:   imp/config/backends.php
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#       horde.log
#       horde/admin/config/LOG_USER
#       horde/services/LOG_USER
#       horde/services/portal/LOG_USER
#       kronolith/LOG_USER
no changes added to commit (use "git add" and/or "git commit -a"

sorry was my fault as i tried to debug and added a line so you thought 
it wasn't current, here with vanilla git

2012-02-20T14:46:00+01:00 NOTICE: HORDE [kronolith] PHP ERROR: 
Undefined property: Kronolith_Driver_Ical::$_permission [pid 6140 on 
line 669 of "/home/user/horde/kronolith/lib/Driver/Ical.php"]
2012-02-20T14:46:00+01:00 DEBUG: HORDE 1. Kronolith::header() 
/home/user/horde/kronolith/index.php:144
2. Kronolith::includeJSVars() /home/user/horde/kronolith/lib/Kronolith.php:92
3. Kronolith_Calendar_Remote->toHash() 
/home/user/horde/kronolith/lib/Kronolith.php:231
4. Kronolith_Calendar_Remote->hasPermission() 
/home/user/horde/kronolith/lib/Calendar/Remote.php:176
5. Kronolith_Driver_Ical->getPermission() 
/home/user/horde/kronolith/lib/Calendar/Remote.php:130
6. Horde::errorHandler() /home/user/horde/kronolith/lib/Driver/Ical.php:669

This is not the latest Git master code.

This looks like a regular DAViCal server which works just fine here.
How did you find that out? Are you sure it's not being redirected by 
the server instead?

2012-02-20T14:18:55+01:00 NOTICE: HORDE [kronolith] PHP ERROR: 
Undefined property: Kronolith_Driver_Ical::$_permission [pid 5829 on 
line 671 of "/home/user/horde/kronolith/lib/Driver/Ical.php"]
2012-02-20T14:18:55+01:00 DEBUG: HORDE 1. Kronolith::header() 
/home/user/horde/kronolith/index.php:144
2. Kronolith::includeJSVars() /home/user/horde/kronolith/lib/Kronolith.php:92
3. Kronolith_Calendar_Remote->toHash() 
/home/user/horde/kronolith/lib/Kronolith.php:231
4. Kronolith_Calendar_Remote->hasPermission() 
/home/user/horde/kronolith/lib/Calendar/Remote.php:176
5. Kronolith_Driver_Ical->getPermission() 
/home/user/horde/kronolith/lib/Calendar/Remote.php:130
6. Horde::errorHandler() /home/user/horde/kronolith/lib/Driver/Ical.php:671

hi,

  adding a owncloud calendar as external calander with url like 
http://192.168.1.99/owncloud/apps/calendar/caldav.php/calendars/user/default 
calender doesn't find the events althouh they do appear in the 
calendar, and after clicking around the external calender isn't shown 
n the left side anymore :(

it looks for the ics at 
http://192.168.1.99/owncloud/apps/calendar/caldav.php/calendars/user/default/owncloud/apps/calendar/caldav.php/calendars/user/default%20calendar/860a9db6-b4b2-4d59-b402-2d321ad119da.ics/ (path added 
twice)