[Freeassociation-devel] Problems with un-escaped characters in TZID

[Brad Hards]

Hi,

I work with the OpenChange project (http://www.openchange.org), which provides 
(amongst other things) a tool that does conversion from Exchange calendars to 
ICalendar. We use libical for that.

One of our users reported that newlines in timezones (TZID) aren't properly 
escaped. Here is the original report:
http://trac.openchange.org/ticket/218

It does indeed appear to be a problem with libical. Attached is a small patch 
for the libical regression tests that shows the problem. Here is the output I 
see with the current (trunk, revision 982) libical.

########## Test TZID escaping                       (43) ##########
DTSTART;VALUE=DATE;TZID=Timezone                                   
with a newline:20090126                                            

not ok 641 - test encoding of 'Timezone\nwith a newline'
# test failed: ""                                       
#          at: regression.c:1270                        
#      got: DTSTART;VALUE=DATE;TZID=Timezone            
with a newline:20090126                                 

# expected: DTSTART;VALUE=DATE,TZID=Timezone\nwith a newline:20090126


I'm not very familiar with libical (just a user of the library), but it looks 
like maybe icalparameter_as_ical_string_r() needs to handle the CTLs?

Thoughts? Suggestions?

Brad
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