/Demo/scripts/mboxconvert.py

  1#! /usr/bin/env python
  2
  3# Convert  MH directories (1 message per file) or MMDF mailboxes (4x^A
  4# delimited) to unix mailbox (From ... delimited) on stdout.
  5# If -f is given, files contain one message per file (e.g. MH messages)
  6
  7import rfc822
  8import sys
  9import time
 10import os
 11import stat
 12import getopt
 13import re
 14
 15def main():
 16    dofile = mmdf
 17    try:
 18        opts, args = getopt.getopt(sys.argv[1:], 'f')
 19    except getopt.error, msg:
 20        sys.stderr.write('%s\n' % msg)
 21        sys.exit(2)
 22    for o, a in opts:
 23        if o == '-f':
 24            dofile = message
 25    if not args:
 26        args = ['-']
 27    sts = 0
 28    for arg in args:
 29        if arg == '-' or arg == '':
 30            sts = dofile(sys.stdin) or sts
 31        elif os.path.isdir(arg):
 32            sts = mh(arg) or sts
 33        elif os.path.isfile(arg):
 34            try:
 35                f = open(arg)
 36            except IOError, msg:
 37                sys.stderr.write('%s: %s\n' % (arg, msg))
 38                sts = 1
 39                continue
 40            sts = dofile(f) or sts
 41            f.close()
 42        else:
 43            sys.stderr.write('%s: not found\n' % arg)
 44            sts = 1
 45    if sts:
 46        sys.exit(sts)
 47
 48numeric = re.compile('[1-9][0-9]*')
 49
 50def mh(dir):
 51    sts = 0
 52    msgs = os.listdir(dir)
 53    for msg in msgs:
 54        if numeric.match(msg) != len(msg):
 55            continue
 56        fn = os.path.join(dir, msg)
 57        try:
 58            f = open(fn)
 59        except IOError, msg:
 60            sys.stderr.write('%s: %s\n' % (fn, msg))
 61            sts = 1
 62            continue
 63        sts = message(f) or sts
 64    return sts
 65
 66def mmdf(f):
 67    sts = 0
 68    while 1:
 69        line = f.readline()
 70        if not line:
 71            break
 72        if line == '\1\1\1\1\n':
 73            sts = message(f, line) or sts
 74        else:
 75            sys.stderr.write(
 76                    'Bad line in MMFD mailbox: %r\n' % (line,))
 77    return sts
 78
 79counter = 0 # for generating unique Message-ID headers
 80
 81def message(f, delimiter = ''):
 82    sts = 0
 83    # Parse RFC822 header
 84    m = rfc822.Message(f)
 85    # Write unix header line
 86    fullname, email = m.getaddr('From')
 87    tt = m.getdate('Date')
 88    if tt:
 89        t = time.mktime(tt)
 90    else:
 91        sys.stderr.write(
 92                'Unparseable date: %r\n' % (m.getheader('Date'),))
 93        t = os.fstat(f.fileno())[stat.ST_MTIME]
 94    print 'From', email, time.ctime(t)
 95    # Copy RFC822 header
 96    for line in m.headers:
 97        print line,
 98    # Invent Message-ID header if none is present
 99    if not m.has_key('message-id'):
100        global counter
101        counter = counter + 1
102        msgid = "<%s.%d>" % (hex(t), counter)
103        sys.stderr.write("Adding Message-ID %s (From %s)\n" %
104                         (msgid, email))
105        print "Message-ID:", msgid
106    print
107    # Copy body
108    while 1:
109        line = f.readline()
110        if line == delimiter:
111            break
112        if not line:
113            sys.stderr.write('Unexpected EOF in message\n')
114            sts = 1
115            break
116        if line[:5] == 'From ':
117            line = '>' + line
118        print line,
119    # Print trailing newline
120    print
121    return sts
122
123if __name__ == "__main__":
124    main()