Module: Sisimai::Lhost::EZweb

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

Overview

Sisimai::Lhost::EZweb decodes a bounce email which created by au EZweb www.au.com/mobile/. 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: ['The user(s) ', 'Your message ', 'Each of the following', '<']}.freeze
UnpaidUser = 
[
  # http://www.naruhodo-au.kddi.com/qa3429203.html
  # The recipient may be unpaid user...?
  'The user(s) account is disabled.',
  'The user(s) account is temporarily limited.',
].freeze

Class Method Summary collapse

Class Method Details

.description ⇒ Object 



115
 
# File 'lib/sisimai/lhost/ezweb.rb', line 115

def description; return 'au EZweb: http://www.au.kddi.com/mobile/'; end

.inquire(mhead, mbody) ⇒ Hash, Nil

This method is abstract.

Decodes the bounce message from au EZweb

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/ezweb.rb', line 23

def inquire(mhead, mbody)
  match  = 0
  match += 1 if mhead['from'].include?('Postmaster@ezweb.ne.jp')
  match += 1 if mhead['from'].include?('Postmaster@au.com')
  match += 1 if mhead['subject'] == 'Mail System Error - Returned Mail'
  match += 1 if mhead['received'].any? { |a| a.include?('ezweb.ne.jp (EZweb Mail) with') }
  match += 1 if mhead['received'].any? { |a| a.include?('.au.com (') }
  if mhead['message-id']
    match += 1 if mhead['message-id'].end_with?('.ezweb.ne.jp>', '.au.com>')
  end
  return nil if match < 2

  fieldtable = Sisimai::RFC1894.FIELDTABLE
  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.include?(a) }
    end
    next if (readcursor & Indicators[:deliverystatus]) == 0 || e.empty?

    # The user(s) account is disabled.
    #
    # <***@ezweb.ne.jp>: 550 user unknown (in reply to RCPT TO command)
    #
    #  -- OR --
    # Each of the following recipients was rejected by a remote
    # mail server.
    #
    #    Recipient: <******@ezweb.ne.jp>
    #    >>> RCPT TO:<******@ezweb.ne.jp>
    #    <<< 550 <******@ezweb.ne.jp>: User unknown
    v = dscontents[-1]

    if Sisimai::String.aligned(e, ['<', '@', '>']) && (e.include?('Recipient: <') || e.start_with?('<'))
      #    Recipient: <******@ezweb.ne.jp> OR <***@ezweb.ne.jp>: 550 user unknown ...
      p1 = e.index('<') || -1
      p2 = e.index('>') || -1

      if v["recipient"] != ""
        # There are multiple recipient addresses in the message body.
        dscontents << Sisimai::Lhost.DELIVERYSTATUS
        v = dscontents[-1]
      end
      v["recipient"]  = Sisimai::Address.s3s4(e[p1, p2 - p1])
      v["diagnosis"] += " #{e}"
      recipients += 1

    elsif Sisimai::RFC1894.match(e) > 0
      # "e" matched with any field defined in RFC3464
      next unless o = Sisimai::RFC1894.field(e)
      next unless fieldtable[o[0]]
      v[fieldtable[o[0]]] = o[2]

    else
      # Other error messages
      #    >>> RCPT TO:<******@ezweb.ne.jp>
      #    <<< 550 ...
      next if Sisimai::String.is_8bit(e)
      v["command"]    = Sisimai::SMTP::Command.find(e) if e.include?(" >>> ")
      v["diagnosis"] += " #{e}"
    end
  end
  return nil if recipients == 0

  dscontents.each do |e|
    # Check each value of DeliveryMatter{}, try to detect the bounce reason.
    e['diagnosis'] = e['diagnosis'].split.join(" ")
    e["command"]   = Sisimai::SMTP::Command.find(e["diagnosis"]) if e["command"].empty?

    if mhead['x-spasign'].to_s == 'NG'
      # Content-Type: text/plain; ..., X-SPASIGN: NG (spamghetti, au by EZweb)
      # Filtered recipient returns message that include 'X-SPASIGN' header
      e['reason'] = 'filtered'
    else
      # There is no X-SPASIGN header or the value of the header is not "NG"
      e['reason'] = "suspend" if UnpaidUser.any? { |a| e['diagnosis'].include?(a) }
    end
    next if e['reason'] != ""
    next if e['recipient'].end_with?('@ezweb.ne.jp', '@au.com')
    e["reason"] = "userunknown" if e["diagnosis"].start_with?("<")
  end

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