Open Outlook email attachments with Ruby

outlook_emails.rb

# NB: Attachment#save seems to produce 0 byte files, probably would be resolved via rewind below

require 'mapi/msg'
msg = Mapi::Msg.open '/tmp/email.msg'

# view body
puts msg.properties.body

# save attachments
msg.attachments.each_with_index do |a, idx|
  a.data.rewind
  filename = File.basename(a.filename || "attachment#{idx}")
  File.open(filename, 'wb') { |file| file.write(a.data.read) }  
end

# also can be useful
msg_parts = msg.to_mime.parts.find { |part| part.content_type == "multipart/alternative" }.parts
msg_parts.find { |part| part.content_type == "text/plain" }.to_s