Module: Sisimai::Lhost::X1

Defined in:
lib/sisimai/lhost/x1.rb

Overview

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

Constant Summary collapse

Indicators = 
Sisimai::Lhost.INDICATORS
Boundaries = 
['Content-Type: message/rfc822', 'Received: from '].freeze
MarkingsOf = 
{message: ['The original message was received at ']}.freeze

Class Method Summary collapse

Class Method Details

.description ⇒ Object 



75
 
# File 'lib/sisimai/lhost/x1.rb', line 75

def description; return 'Unknown MTA #1'; end

.inquire(mhead, mbody) ⇒ Hash, Nil

This method is abstract.

Decodes the bounce message from Unknown MTA #1

Parameters:

  • mhead (Hash) —

    Message headers of a bounce email

  • mbody (String) —

    Message body of a bounce email

Returns:

  • (Hash) —

    Bounce data list and message/rfc822 part

  • (Nil) —

    it failed to decode or the arguments are missing



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# File 'lib/sisimai/lhost/x1.rb', line 17

def inquire(mhead, mbody)
  proceedsto = false
  proceedsto = true if mhead['subject'].start_with?('Returned Mail: ')
  proceedsto = true if mhead['subject'].start_with?('Mail Delivery Failure')
  proceedsto = true if Sisimai::String.aligned(mhead['from'], ['"Mail Deliver', 'System" '])
  return nil if proceedsto == false

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

  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.start_with?(MarkingsOf[:message][0])
      next
    end
    next if (readcursor & Indicators[:deliverystatus]) == 0 || 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 Sisimai::String.aligned(e, ['@', ' [', ']'])
      # 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
      p1 = e.index(' ')
      p2 = e.index(']')
      v['recipient'] = e[0, p1]
      v['diagnosis'] = e[p1 + 2, p2 - p1 - 2]
      recipients += 1

    elsif e.start_with?(MarkingsOf[:message][0])
      # The original message was received at Thu, 29 Apr 2010 23:34:45 +0900 (JST)
      datestring = e[MarkingsOf[:message][0].size, e.size]
    end
  end
  return nil if recipients == 0

  dscontents.each do |e|
    e['date'] = datestring || ''
  end

  return {"ds" => dscontents, "rfc822" => emailparts[1]}
end