module Sisimai::Lhost::X5
Sisimai::Lhost::X5
parses a bounce email which created by Unknown MTA #5. Methods in the module are called from only Sisimai::Message
.
Constants
- Indicators
- ReBackbone
- StartingOf
Public Class Methods
description()
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# File lib/sisimai/lhost/x5.rb, line 110 def description; return 'Unknown MTA #5'; end
make(mhead, mbody)
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Parse bounce messages from Unknown MTA #5 @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/x5.rb, line 18 def make(mhead, mbody) match = 0 match += 1 if mhead['to'].to_s.include?('NotificationRecipients') if mhead['from'].include?('TWFpbCBEZWxpdmVyeSBTdWJzeXN0ZW0') # From: "=?iso-2022-jp?B?TWFpbCBEZWxpdmVyeSBTdWJzeXN0ZW0=?=" <...> # Mail Delivery Subsystem mhead['from'].split(' ').each do |f| # Check each element of From: header next unless Sisimai::MIME.is_mimeencoded(f) match += 1 if Sisimai::MIME.mimedecode([f]).include?('Mail Delivery Subsystem') break end end if Sisimai::MIME.is_mimeencoded(mhead['subject']) # Subject: =?iso-2022-jp?B?UmV0dXJuZWQgbWFpbDogVXNlciB1bmtub3du?= plain = Sisimai::MIME.mimedecode([mhead['subject']]) match += 1 if plain.include?('Mail Delivery Subsystem') end return nil if match < 2 require 'sisimai/rfc1894' fieldtable = Sisimai::RFC1894.FIELDTABLE dscontents = [Sisimai::Lhost.DELIVERYSTATUS] readslices = [''] readcursor = 0 # (Integer) Points the current cursor position recipients = 0 # (Integer) The number of 'Final-Recipient' header v = nil # Pick the second message/rfc822 part because the format of email-x5-*.eml is nested structure prefillets = mbody.split(ReBackbone, 2) prefillets[1].sub!(/\A.+?\n\n/s, '') emailsteak = Sisimai::RFC5322.fillet(prefillets[1], ReBackbone) bodyslices = emailsteak[0].split("\n") 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. readslices << e # Save the current line for the next loop if readcursor == 0 # Beginning of the bounce message or message/delivery-status part readcursor |= Indicators[:deliverystatus] if e.start_with?(StartingOf[:message][0]) next end next if (readcursor & Indicators[:deliverystatus]) == 0 next if e.empty? v = dscontents[-1] if f = Sisimai::RFC1894.match(e) # "e" matched with any field defined in RFC3464 next unless o = Sisimai::RFC1894.field(e) v = dscontents[-1] if o[-1] == 'addr' # Final-Recipient: rfc822; kijitora@example.jp # X-Actual-Recipient: rfc822; kijitora@example.co.jp if o[0] == 'final-recipient' # Final-Recipient: rfc822; kijitora@example.jp if v['recipient'] # There are multiple recipient addresses in the message body. dscontents << Sisimai::Lhost.DELIVERYSTATUS v = dscontents[-1] end v['recipient'] = o[2] recipients += 1 else # X-Actual-Recipient: rfc822; kijitora@example.co.jp v['alias'] = o[2] end elsif o[-1] == 'code' # Diagnostic-Code: SMTP; 550 5.1.1 <userunknown@example.jp>... User Unknown v['spec'] = o[1] v['diagnosis'] = o[2] else # Other DSN fields defined in RFC3464 next unless fieldtable[o[0]] v[fieldtable[o[0]]] = o[2] end else # Continued line of the value of Diagnostic-Code field next unless readslices[-2].start_with?('Diagnostic-Code:') next unless cv = e.match(/\A[ \t]+(.+)\z/) v['diagnosis'] << ' ' << cv[1] readslices[-1] = 'Diagnostic-Code: ' << e end end return nil unless recipients > 0 dscontents.each { |e| e['diagnosis'] ||= Sisimai::String.sweep(e['diagnosis']) } return { 'ds' => dscontents, 'rfc822' => emailsteak[1] } end