i want to send iCalendar meeting invitations. I am using Google App engine, Java. I managed to send a mail with an iCalendar file as an attachment, but programs like Outlook do not automatically recognize it as a meeting invitation.
I figure, i have to set the content-type of the attachment to: "text/calendar; method=REQUEST", but it seems to me, GAE is not accepting this?
Update: I was wrong above. I actually found, that i have to send the mail with the iCalendar part directly in the content, not as an attachment! So my problem is, GAE seems not to accept setting the content-type of the message itself.
Has anyone succesfully send a meeting invitation iCalendar element through mail using GAE?
Update:
I understand, i have to be more specific. In fact, i want to send iMip messages. iMip messages are not multipart, their content-type is "text/calendar". And in the case of sending a meeting invitation, it would be "text/calendar;method=REQUEST". So i tried this:
Message msg = new MimeMessage(session);
msg.setContent(iCalendarAsString, "text/calendar;method=REQUEST");
Then i send the message with Transport.send(..);
In the logs in the development server of GAE i then see, that the content type is "text/plain". that's why i said, i think, GAE is not accepting setting a different content type.
Or am i wrong?
Update 2
OK, here's the complete code:
Properties props = new Properties();
Session session = Session.getDefaultInstance(props, null);
try {
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress("ical@someapp.appspotmail.com", "SomeApp"));
msg.addRecipient(Message.RecipientType.TO,
new InternetAddress("me@mydomain.de", "Sven Busse"));
msg.setSubject("meeting invitation!");
msg.setContent(iCalendarAsString, "text/calendar;method=REQUEST");
Transport.send(msg);
} catch (AddressException e) {
log.warning(e.toString());
e.printStackTrace();
} catch (MessagingException e) {
log.warning(e.toString());
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
log.warning(e.toString());
e.printStackTrace();
}
So, i set the content-type to "text/calendar;method=REQUEST". And once i send, this is the logs:
14.09.2011 09:52:59 com.google.appengine.api.mail.dev.LocalMailService log
INFO: MailService.send
INFO: From: SomeApp <ical@someapp.appspotmail.com>
INFO: To: Sven Busse <me@mydomain.de>
INFO: Reply-to: SomeApp <ical@someapp.appspotmail.com>
INFO: Subject: meeting invitation!
INFO: Body:
INFO: Content-type: text/plain
INFO: Data length: 458
So, the logs don't look pretty, but you can see, the content-type has changed to "text/plain".
Update 3:
Delivered-To: me@mydomain.de
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for <me@mydomain.de>; Thu, 15 Sep 2011 07:45:53 -0700 (PDT)
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Reply-To: SomeApp <ical@someapp.appspotmail.com>
X-Google-Appengine-App-Id: someapp
Message-ID: <20cf305e2551fe38a104acfbee28@google.com>
Date: Thu, 15 Sep 2011 14:45:53 +0000
Subject: meeting invitation!
From: SomeApp <ical@someapp.appspotmail.com>
To: Sven Busse <me@mydomain.de>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed; delsp=yes
BEGIN:VCALENDAR
PRODID:-//Ben Fortuna//iCal4j 1.0//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:REQUEST
BEGIN:VEVENT
DTSTAMP:20110915T144552Z
UID:20110915T144552Z-1@someapp.appspotmail.com
SUMMARY:tolles projekt\, macht viel spass.
DTSTART;VALUE=DATE:20110919
DTEND;VALUE=DATE:20110926
DESCRIPTION:tolles projekt\, macht viel spass.
ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE:mailto:me@mydomain.de
ORGANIZER:mailto:ical@someapp.appspotmail.com
END:VEVENT
END:VCALENDAR
