mogmail with Python version 2.1

Python版mogmail バージョン2.1

以前作成した、こちらのスクリプトを改良。
http://mogproject.blogspot.com/2011/10/mogmail-with-python-version-20.html

・JISのデコードに失敗した機種依存文字については、一旦SJISに変換してから
　cp932 でデコードすれば正しく表示されることがわかった。
・JISからSJISの変換については、結局自前で実装することに。

mogmail.py

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#!/usr/bin/env python # Copyright (c) 2011 Mog Project. All rights reserved. # Version: 2.1, Updated: 2011/10/23   import poplib import email from email.header import decode_header from email.utils import parsedate_tz from email.utils import mktime_tz import sys import time   POP3_SERVER = 'POP3-Server' POP3_PORT = 110 POP3_USERNAME = 'UserName' POP3_PASSWORD = 'Password' SHOW_LENGTH = 5   def jis_to_sjis(jis):   esc_seq = (  # pair of (sequense, is_double_bytes)       ('\x1b(B', False),  # ASCII       ('\x1b(J', False),  # JIS X 0201-1976 Roman Set       ('\x1b(I', False),  # JIS X 0201-1976 Katakana       ('\x1b$@', True),  # JIS X 0208-1978 (old JIS kanji)       ('\x1b$B', True),  # JIS X 0208-1983 (new JIS kanji)       ('\x1b&@\x1b$B', True),  # JIS X 0208-1990       ('\x1b$(D', True)  # JIS X 0212-1990       )   chunks = []   pos = 0   flg = False   while pos < len(jis):     for seq, is_double_bytes in esc_seq:       if jis[pos:].startswith(seq):         flg = is_double_bytes         pos += len(seq)         break     else:       if flg:         hi, lo = ord(jis[pos]), ord(jis[pos + 1])         if hi & 1:           hi = ((hi + 1) >> 1) + 0x70           lo += 0x1f         else:           hi = (hi >> 1) + 0x70           lo += 0x7d         if hi >= 0xa0: hi += 0x40         if lo >= 0x7f: lo += 1         chunks.append(chr(hi) + chr(lo))         pos += 2       else:         chunks.append(jis[pos])         pos += 1   return ''.join(chunks)   class Parser(object):   def __init__(self, msg):     self.msg = msg   def date(self):     return time.localtime(mktime_tz(parsedate_tz(self.msg['date'])))   def from_(self): return self.get_item('from')   def subject(self): return self.get_item('subject')   def get_item(self, key):     uchunks = []     decoded_seq = decode_header(self.msg[key].replace('"', ''))     for s, charset in decoded_seq:       if not charset: charset = 'us-ascii'         # If charset is iso-2022-jp(jis), convert to cp932(sjis)       #   for platform dependent characters.       if charset == 'iso-2022-jp':         s = jis_to_sjis(s)         charset = 'cp932'       uchunks.append(unicode(s, charset, 'ignore'))     return u''.join(uchunks).encode(sys.stdout.encoding)   def main():   pop3 = poplib.POP3(POP3_SERVER, POP3_PORT)   try:     pop3.apop(POP3_USERNAME, POP3_PASSWORD)     msg_cnt = pop3.stat()[0]     if not msg_cnt: print 'No message.'     for i in range(msg_cnt, max(msg_cnt - SHOW_LENGTH, 0), -1):       p = Parser(email.message_from_string('\n'.join(pop3.top(i, 0)[1])))       print time.strftime('[%m/%d %H:%M]', p.date()),       print '%s\n  %s' % (p.from_(), p.subject())   except poplib.error_proto, detail:     print 'POP3 Protocol Error:', detail   finally:     pop3.quit()   if __name__ == '__main__':   main()