Guido van Rossum | c7b6882 | 1994-04-28 09:53:33 +0000 | [diff] [blame] | 1 | # |
| 2 | # A class to hand a unix-style or mmdf-style mailboxes |
| 3 | # |
| 4 | # Jack Jansen, CWI, March 1994. |
| 5 | # |
| 6 | import rfc822 |
| 7 | |
| 8 | class _Mailbox: |
| 9 | def __init__(self, fp): |
| 10 | self.fp = fp |
| 11 | self.seekp = 0 |
| 12 | |
| 13 | def seek(self, pos): |
| 14 | self.seekp = pos |
| 15 | |
| 16 | def next(self): |
| 17 | while 1: |
| 18 | self.fp.seek(self.seekp) |
| 19 | try: |
| 20 | self._search_start() |
| 21 | except EOFError: |
| 22 | self.seekp = self.fp.tell() |
| 23 | return None |
| 24 | start = self.fp.tell() |
| 25 | self._search_end() |
| 26 | self.seekp = stop = self.fp.tell() |
| 27 | if start <> stop: |
| 28 | break |
| 29 | return rfc822.Message(_Subfile(self.fp, start, stop)) |
| 30 | |
| 31 | class _Subfile: |
| 32 | def __init__(self, fp, start, stop): |
| 33 | self.fp = fp |
| 34 | self.start = start |
| 35 | self.stop = stop |
| 36 | self.pos = self.start |
| 37 | |
Guido van Rossum | 2922c6d | 1994-05-06 14:28:19 +0000 | [diff] [blame^] | 38 | def read(self, length = None): |
Guido van Rossum | c7b6882 | 1994-04-28 09:53:33 +0000 | [diff] [blame] | 39 | if self.pos >= self.stop: |
| 40 | return '' |
Guido van Rossum | 2922c6d | 1994-05-06 14:28:19 +0000 | [diff] [blame^] | 41 | if length is None: |
Guido van Rossum | c7b6882 | 1994-04-28 09:53:33 +0000 | [diff] [blame] | 42 | length = self.stop - self.pos |
Guido van Rossum | c7b6882 | 1994-04-28 09:53:33 +0000 | [diff] [blame] | 43 | self.fp.seek(self.pos) |
| 44 | self.pos = self.pos + length |
| 45 | return self.fp.read(length) |
| 46 | |
Guido van Rossum | 2922c6d | 1994-05-06 14:28:19 +0000 | [diff] [blame^] | 47 | def readline(self, length = None): |
Guido van Rossum | c7b6882 | 1994-04-28 09:53:33 +0000 | [diff] [blame] | 48 | if self.pos >= self.stop: |
| 49 | return '' |
Guido van Rossum | 2922c6d | 1994-05-06 14:28:19 +0000 | [diff] [blame^] | 50 | if length is None: |
Guido van Rossum | c7b6882 | 1994-04-28 09:53:33 +0000 | [diff] [blame] | 51 | length = self.stop - self.pos |
Guido van Rossum | c7b6882 | 1994-04-28 09:53:33 +0000 | [diff] [blame] | 52 | self.fp.seek(self.pos) |
| 53 | data = self.fp.readline(length) |
| 54 | if len(data) < length: |
| 55 | length = len(data) |
| 56 | self.pos = self.pos + length |
| 57 | return data |
| 58 | |
| 59 | def tell(self): |
| 60 | return self.pos - self.start |
| 61 | |
| 62 | def seek(self, pos): |
| 63 | self.pos = pos + self.start |
| 64 | |
| 65 | def close(self): |
| 66 | pass |
| 67 | |
| 68 | class UnixMailbox(_Mailbox): |
| 69 | def _search_start(self): |
| 70 | while 1: |
| 71 | line = self.fp.readline() |
| 72 | if not line: |
| 73 | raise EOFError |
| 74 | if line[:5] == 'From ': |
| 75 | return |
| 76 | |
| 77 | def _search_end(self): |
| 78 | while 1: |
| 79 | pos = self.fp.tell() |
| 80 | line = self.fp.readline() |
| 81 | if not line: |
| 82 | return |
| 83 | if line[:5] == 'From ': |
| 84 | self.fp.seek(pos) |
| 85 | return |
| 86 | |
| 87 | class MmdfMailbox(_Mailbox): |
| 88 | def _search_start(self): |
| 89 | while 1: |
| 90 | line = self.fp.readline() |
| 91 | if not line: |
| 92 | raise EOFError |
| 93 | if line[:5] == '\001\001\001\001\n': |
| 94 | return |
| 95 | |
| 96 | def _search_end(self): |
| 97 | while 1: |
| 98 | pos = self.fp.tell() |
| 99 | line = self.fp.readline() |
| 100 | if not line: |
| 101 | return |
| 102 | if line == '\001\001\001\001\n': |
| 103 | self.fp.seek(pos) |
| 104 | return |
| 105 | |
| 106 | if __name__ == '__main__': |
| 107 | import posix |
| 108 | import time |
| 109 | import sys |
| 110 | import string |
| 111 | mbox = '/usr/mail/'+posix.environ['USER'] |
| 112 | fp = open(mbox, 'r') |
| 113 | mb = UnixMailbox(fp) |
| 114 | msgs = [] |
| 115 | while 1: |
| 116 | msg = mb.next() |
| 117 | if not msg: |
| 118 | break |
| 119 | msgs.append(msg) |
| 120 | if len(sys.argv) > 1: |
| 121 | num = string.atoi(sys.argv[1]) |
| 122 | print 'Message %d body:'%num |
| 123 | msg = msgs[num-1] |
| 124 | msg.rewindbody() |
| 125 | sys.stdout.write(msg.fp.read()) |
| 126 | sys.exit(0) |
| 127 | print 'Mailbox',mbox,'has',len(msgs),'messages:' |
| 128 | for msg in msgs: |
| 129 | f = msg.getheader('from') |
| 130 | s = msg.getheader('subject') |
| 131 | d = (msg.getheader('date')) |
| 132 | print '%20.20s %18.18s %-30.30s'%(f, d[5:], s) |
| 133 | |