module Sisimai::Lhost::Facebook
Sisimai::Lhost::Facebook
parses a bounce email which created by Facebook
. Methods in the module are called from only Sisimai::Message
.
Constants
- Indicators
- ReBackbone
- ReFailures
- StartingOf
Public Class Methods
description()
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# File lib/sisimai/lhost/facebook.rb, line 193 def description; return 'Facebook: https://www.facebook.com'; end
make(mhead, mbody)
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Parse bounce messages from Facebook
@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/facebook.rb, line 77 def make(mhead, mbody) return nil unless mhead['from'] == 'Facebook <mailer-daemon@mx.facebook.com>' return nil unless mhead['subject'] == 'Sorry, your message could not be delivered' require 'sisimai/rfc1894' fieldtable = Sisimai::RFC1894.FIELDTABLE permessage = {} # (Hash) Store values of each Per-Message field dscontents = [Sisimai::Lhost.DELIVERYSTATUS] emailsteak = Sisimai::RFC5322.fillet(mbody, ReBackbone) bodyslices = emailsteak[0].split("\n") readslices = [''] readcursor = 0 # (Integer) Points the current cursor position recipients = 0 # (Integer) The number of 'Final-Recipient' header fbresponse = '' # (String) Response code from Facebook 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. 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 == StartingOf[:message][0] next end next if (readcursor & Indicators[:deliverystatus]) == 0 next if e.empty? if f = Sisimai::RFC1894.match(e) # "e" matched with any field defined in RFC3464 o = Sisimai::RFC1894.field(e) || next 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] next unless f == 1 permessage[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 do |e| e['lhost'] ||= permessage['lhost'] e['diagnosis'] = Sisimai::String.sweep(e['diagnosis']) if cv = e['diagnosis'].match(/\b([A-Z]{3})[-]([A-Z])(\d)\b/) # Diagnostic-Code: smtp; 550 5.1.1 RCP-P2 lhs = cv[1] rhs = cv[2] num = cv[3] fbresponse = sprintf('%s-%s%d', lhs, rhs, num) end catch :SESSION do ReFailures.each_key do |r| # Verify each regular expression of session errors ReFailures[r].each do |rr| # Check each regular expression next unless fbresponse == rr e['reason'] = r throw :SESSION end end end # http://postmaster.facebook.com/response_codes # Facebook System Resource Issues # These codes indicate a temporary issue internal to Facebook's # system. Administrators observing these issues are not required to # take any action to correct them. next if e['reason'] # * INT-Tx # # https://groups.google.com/forum/#!topic/cdmix/eXfi4ddgYLQ # This block has not been tested because we have no email sample # including "INT-T?" error code. next unless fbresponse =~ /\AINT-T\d+\z/ e['reason'] = 'systemerror' end return { 'ds' => dscontents, 'rfc822' => emailsteak[1] } end