mail.json

{
"pop_host" : "host.com",
"pop_port" : 110,
"pop_userid" : "userid",
"pop_passwd" : "passwd"
}

recv_mail.rb

# -*- encoding: utf-8 -*- 

require 'rubygems'
require 'tmail'
require 'net/pop'
require 'json'

jsondata =open("./mail.json").read
setting = JSON.parse(jsondata)

pop_host = setting["pop_host"]
pop_port = setting["pop_port"]
pop_userid = setting["pop_userid"]
pop_passwd = setting["pop_passwd"]

MailDir = './inbox/'
Dir::mkdir(MailDir) if not FileTest::directory?(MailDir)

begin
  pop3 = Net::POP3.new(pop_host, pop_port)
  pop3.start(pop_userid, pop_passwd) do |pop|
    unless pop.mails.empty?
      mailnum=0
      pop.mails.each do |m|
        begin
          mailnum += 1
          mail = TMail::Mail.parse(m.pop)
          
          # tmail 1.2.7.1 の不具合? subjectが日本語の場合、取得しようとすると以下エラーとなる
          # incompatible encoding regexp match (US-ASCII regexp with ISO-2022-JP string)
          begin
            sbj = mail.subject
          rescue
            sbj="default"
          end
          
          # win環境用にtosjisしている。
          puts "===================================================="
          puts "[#{mailnum}]"
          puts "#{mail.from}:[#{sbj.tosjis}] \n #{mail.body.tosjis}"
          
          # 添付ファイル保存
          mail.parts.each do |part|
            part.base64_decode
            if part['content-disposition']
              tmpfile = part['content-disposition']['filename'].tosjis
              
              savedir = "#{MailDir}/#{mailnum}/"
              
              Dir::mkdir(savedir) if not FileTest::directory?(savedir)
              File.open("#{savedir}#{tmpfile}", 'w') {|f|
                f.write part.body
              }
            end
          end
          puts "===================================================="
          # 出力後、メールを削除
          #m.delete
          
        rescue Exception => e
          puts "Error " + Time.now.to_s + "::: " + e.message
        end
      end
    end
  end
rescue Net::POPAuthenticationError => e
  puts "Error pop authentication at " + Time.now.to_s + "::: " + e.message
end