Is it possible to sync CalDAV calendars with older iPods?

Question

I am reposting from the "Older iPods" list, on which I did not get much feedback.
https://discussions.apple.com/message/15171363#15171363
Basically, since I upgraded to the new MobileMe calendars, which use CalDAV instead of being local calendars, I can no longer view them on my iPod Mini. The .ics files that iTunes puts in the iPod's Calendars/ folder are empty.
So, is this a fixable problem on my side, or is this feature just non-existent?...
Thanks in advance for your insights

Answer 1

I have written the following Python 2.6 script that exports all CalDAV calendars to the iPod. I have only tested it with iCal 4.0.4 (1395.7) and an iPod mini (software version 1.4.1), on Mac OS 10.6.7.
DISCLAIMER: This script deletes and overwrites files. USE AT YOUR OWN RISK!
import os
username = "my_Mac_user_name"
ipodName = "name_of_my_iPod"
# First delete all calendars in the output folder
outputDir = "/Volumes/" + ipodName + "/Calendars/"
for calFile in os.listdir(outputDir):
    if ".ics" in calFile:
        print "Deleting", outputDir + calFile
        os.remove(outputDir + calFile)
# Loop over all CalDAV accounts
userDir = "/Users/" + username + "/Library/Calendars/"
for accountDir in os.listdir(userDir):
    if ".caldav" in accountDir:
        print "CalDAV account:", accountDir
        # Loop over all calendars
        for calDir in os.listdir(userDir + accountDir):
            if ".calendar" in calDir:
                # Retrieve the calendar name from the Info.plist file
                foundName = False
                foundColor = False
                for line in open (userDir + accountDir + "/" + calDir + "/Info.plist"):
                    if "<key>Title</key>" in line:
                        foundName = True
                    elif foundName and "<string>" in line:
                        name = line.partition("<string>")[2].partition("</string>")[0]
                        foundName = False
                    elif "<key>Color</key>" in line:
                        foundColor = True
                    elif foundColor and "<string>" in line:
                        color = line.partition("<string>")[2].partition("</string>")[0]
                        foundColor = False
                print "\t Calendar:", name
                # Write the header
                outFile = open (outputDir + name + ".ics", "w")
                outFile.write("BEGIN:VCALENDAR\r\n")
                outFile.write("X-WR-CALNAME:" + name + "\r\n")
                outFile.write("X-APPLE-CALENDAR-COLOR:" + color + "\r\n")
                # Loop over the events
                for eventFile in os.listdir(userDir + accountDir + "/" + calDir + "/Events/"):
                    # Parse the event file, skipping the header
                    header = True
                    for line in open (userDir + accountDir + "/" + calDir + "/Events/" + eventFile):
                        if "END:VCALENDAR" in line:
                            break
                        elif not header or "BEGIN:VEVENT" in line or "BEGIN:VTODO" in line:
                            header = False
                            outFile.write(line)
                            if "SUMMARY:" in line:
                                print "\t\t Event/Todo:", line.partition(":")[2].partition("\r\n")[0]
                # Write the footer
                outFile.write("END:VCALENDAR\r\n")
print "Done."