Module: Sisimai::Lhost::KDDI

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

Overview

Sisimai::Lhost::KDDI decodes a bounce email which created by au by KDDI www.au.com/. Methods in the module are called from only Sisimai::Message.

Constant Summary collapse

Indicators = 
Sisimai::Lhost.INDICATORS
Boundaries = 
['Content-Type: message/rfc822'].freeze
StartingOf = 
{message: ['Your mail sent on:', 'Your mail attempted to be delivered on:']}.freeze

Class Method Summary collapse

Class Method Details

.description ⇒ Object 



85
 
# File 'lib/sisimai/lhost/kddi.rb', line 85

def description; return 'au by KDDI: https://www.au.kddi.com'; end

.inquire(mhead, mbody) ⇒ Hash, Nil

This method is abstract.

Decodes the bounce message from au by KDDI

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/kddi.rb', line 17

def inquire(mhead, mbody)
  # :'message-id' => %r/[@].+[.]ezweb[.]ne[.]jp[>]\z/,
  match  = 0
  match += 1 if Sisimai::String.aligned(mhead['from'], ['no-reply@.', '.dion.ne.jp'])
  match += 1 if mhead['reply-to'].to_s == 'no-reply@app.auone-net.jp'
  match += 1 if mhead['received'].any? { |a| a.include?('ezweb.ne.jp (') }
  match += 1 if mhead['received'].any? { |a| a.include?('.au.com (') }
  return nil if match == 0

  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

  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 StartingOf[:message].any? { |a| e.start_with?(a) }
      next
    end
    next if (readcursor & Indicators[:deliverystatus]) == 0 || e.empty?

    v = dscontents[-1]
    case
    when e.include?(' Could not be delivered to: <')
      # Your mail sent on: Thu, 29 Apr 2010 11:04:47 +0900
      #     Could not be delivered to: <******@**.***.**>
      #     As their mailbox is full.
      if v["recipient"] != ""
        # There are multiple recipient addresses in the message body.
        dscontents << Sisimai::Lhost.DELIVERYSTATUS
        v = dscontents[-1]
      end
      r = Sisimai::Address.s3s4(e[e.index('<') + 1, e.size])
      next if Sisimai::Address.is_emailaddress(r) == false
      v['recipient'] = r
      recipients += 1

    when e.include?('Your mail sent on: ')
      # Your mail sent on: Thu, 29 Apr 2010 11:04:47 +0900
      v['date'] = e[19, e.size]
    else
      #     As their mailbox is full.
      v['diagnosis'] += "#{e} " if e.start_with?(' ')
    end
  end
  return nil if recipients == 0

  require 'sisimai/smtp/command'
  dscontents.each do |e|
    e['command']   = Sisimai::SMTP::Command.find(e['diagnosis'])

    if mhead['x-spasign'].to_s == 'NG'
      # Content-Type: text/plain; ..., X-SPASIGN: NG (spamghetti, au by KDDI)
      # Filtered recipient returns message that include 'X-SPASIGN' header
      e['reason'] = 'filtered'
    else
      # There is no X-SPASIGN: header in the bounce message
      # set "userunknown" when the remote server rejected after RCPT command.
      e['reason'] = 'userunknown' if e['command'] == 'RCPT'
    end
  end

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