Outlook appointment with rails - ruby-on-rails

Question

I'm trying to send an appointment from ruby (rails) to Microsoft Outlook 2013.
When I'm sending an ICS file in the attachment, user have to open the file manually.
Looking for a way to send normal meeting request (user won’t need to open ICS to accept it).
I read the tutorial: http://knaveofdiamonds.com/post/50689213/sending-outlook-appointments-with-ruby
but it’s not working for me, user getting the following email:
--
Date: Tue, 27 May 2014 23:17:23 +0300
Message-ID: <5384f2d3b125b_90c30357c28514#Eric-PC.mail>
Mime-Version: 1.0
Content-Type: text/plain;
charset=UTF-8
Content-Transfer-Encoding: base64
Content-Disposition: inline
QSBSdWJ5IGNyZWF0ZWQgYXBwb2ludG1lbnQ=
--
Date: Tue, 27 May 2014 23:17:23 +0300
Message-ID: <5384f2d3b1e13_90c30357c2861e#Eric-PC.mail>
Mime-Version: 1.0
Content-Type: text/calendar;
charset=UTF-8;
method=request;
name=subject.ics
Content-Transfer-Encoding: quoted-printable
content-class: urn:content-classes:calendarmessage
BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTSTAMP:20140527T201722Z
UID:abb15328-a6af-4c95-8e04-acdb9d6584e2
DTSTART:20140623T083000
DTEND:20140624T083000
CLASS:PRIVATE
DESCRIPTION:Have a long lunch meeting and decide nothing...
SUMMARY:Meeting with the man.
END:VEVENT
END:VCALENDAR
This is my ruby code
cal = Icalendar::Calendar.new
cal.event do |e|
e.dtstart = DateTime.civil(2014, 6, 23, 8, 30)
e.dtend = DateTime.civil(2014, 6, 24, 8, 30)
e.summary = "Meeting with the man."
e.description = "Have a long lunch meeting and decide nothing..."
e.ip_class = "PRIVATE"
e.uid = SecureRandom.uuid
end
Mail.defaults do
delivery_method :smtp, options
end
mail = Mail.new
mail.mime_version = "1.0"
mail.body = cal.to_ical
mail.from = 'ericfeldman93#gmail.com'
mail.to = 'ericfeldman93#gmail.com'
mail.subject = 'bla'
mail.content_type = "text/calendar"
mail.deliver
Any idea?

Answer 1

You should not send an ICS file as an attachment. Your whole message must have the content type of text/calendar and it should have a single part - text/calendar:
Date: Tue, 27 May 2014 23:17:23 +0300
Message-ID: <5384f2d3b125b_90c30357c28514#Eric-PC.mail>
Mime-Version: 1.0
Content-Type: text/calendar;
charset=UTF-8;
method=request;
name=subject.ics
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
content-class: urn:content-classes:calendarmessage
BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTSTAMP:20140527T201722Z
UID:abb15328-a6af-4c95-8e04-acdb9d6584e2
DTSTART:20140623T083000
DTEND:20140624T083000
CLASS:PRIVATE
DESCRIPTION:Have a long lunch meeting and decide nothing...
SUMMARY:Meeting with the man.
END:VEVENT
END:VCALENDAR