iCalendar (hosted on Posteo) ACKNOWLEDGED format

[mhuebi]

Hello,

I have a problem to use ISCdroid with a posteo calendar-feed.
When I try to add the calendar-URL, I get an Error:
‚Could not parse iCalendar resource‘

System:
Faiphone with Android 6.0.1
ICSDroid 1.5.4

I could send the URL to someone personally.

Thanks for your help,
Matthias

[rfc2822]

@mhuebi Please send the URL to play@bitfire.at

[rfc2822]

Hello,

Thanks for the URL. The problem are these lines:

 ACKNOWLEDGED::20180316T082301Z

ACKNOWLEDGED seems to be defined by this draft: https://tools.ietf.org/id/draft-daboo-valarm-extensions-04.html#rfc.section.8.1 and is understood and parsed by ical4j.

ACKNOWLEDGED is defined like this:

acknowledged = "ACKNOWLEDGED" acknowledgedparam ":" datetime CRLF
 
acknowledgedparam  = *(

                     ; the following is OPTIONAL,
                     ; and MAY occur more than once

                     (";" other-param)

                     )

Example:
ACKNOWLEDGED:20090604T084500Z

In your iCalendar resource, there are two colons (:), which is not parseable.

So, this is an invalid iCalendar file. Please fix the your iCalendar or report this problem (including this analysis) to someone who can fix it.