module Sisimai::Lhost::X1

Sisimai::Lhost::X1 parses a bounce email which created by Unknown MTA #1. Methods in the module are called from only Sisimai::Message.

Constants

Indicators
MarkingsOf
ReBackbone

Public Class Methods

description() click to toggle source
# File lib/sisimai/lhost/x1.rb, line 74
def description; return 'Unknown MTA #1'; end
make(mhead, mbody) click to toggle source

Parse bounce messages from Unknown MTA #1 @param [Hash] mhead Message headers of a bounce email @param [String] mbody Message body of a bounce email @return [Hash] Bounce data list and message/rfc822 part @return [Nil] it failed to parse or the arguments are missing

# File lib/sisimai/lhost/x1.rb, line 18
def make(mhead, mbody)
  return nil unless mhead['subject'].start_with?('Returned Mail: ')
  return nil unless mhead['from'].start_with?('"Mail Deliver System" ')

  dscontents = [Sisimai::Lhost.DELIVERYSTATUS]
  emailsteak = Sisimai::RFC5322.fillet(mbody, ReBackbone)
  bodyslices = emailsteak[0].split("\n")
  readcursor = 0      # (Integer) Points the current cursor position
  recipients = 0      # (Integer) The number of 'Final-Recipient' header
  datestring = ''     # (String) Date string
  v = nil

  while e = bodyslices.shift do
    # Read error messages and delivery status lines from the head of the email
    # to the previous line of the beginning of the original message.
    if readcursor == 0
      # Beginning of the bounce message or delivery status part
      readcursor |= Indicators[:deliverystatus] if e =~ MarkingsOf[:message]
      next
    end
    next if (readcursor & Indicators[:deliverystatus]) == 0
    next if e.empty?

    # The original message was received at Thu, 29 Apr 2010 23:34:45 +0900 (JST)
    # from shironeko@example.jp
    #
    # ---The following addresses had delivery errors---
    #
    # kijitora@example.co.jp [User unknown]
    v = dscontents[-1]

    if cv = e.match(/\A([^ ]+?[@][^ ]+?)[ ]+\[(.+)\]\z/)
      # kijitora@example.co.jp [User unknown]
      if v['recipient']
        # There are multiple recipient addresses in the message body.
        dscontents << Sisimai::Lhost.DELIVERYSTATUS
        v = dscontents[-1]
      end
      v['recipient'] = cv[1]
      v['diagnosis'] = cv[2]
      recipients += 1

    elsif cv = e.match(MarkingsOf[:message])
      # The original message was received at Thu, 29 Apr 2010 23:34:45 +0900 (JST)
      datestring = cv[1]
    end
  end
  return nil unless recipients > 0

  dscontents.each do |e|
    e['diagnosis'] = Sisimai::String.sweep(e['diagnosis'])
    e['date']      = datestring || ''
  end

  return { 'ds' => dscontents, 'rfc822' => emailsteak[1] }
end