| 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 | |
| 38 | def read(self, *args): |
| 39 | if self.pos >= self.stop: |
| 40 | return '' |
| 41 | if args == (): |
| 42 | length = self.stop - self.pos |
| 43 | else: |
| 44 | length = args[0] |
| 45 | self.fp.seek(self.pos) |
| 46 | self.pos = self.pos + length |
| 47 | return self.fp.read(length) |
| 48 | |
| 49 | def readline(self, *args): |
| 50 | if self.pos >= self.stop: |
| 51 | return '' |
| 52 | if args == (): |
| 53 | length = self.stop - self.pos |
| 54 | else: |
| 55 | length = args[0] |
| 56 | self.fp.seek(self.pos) |
| 57 | data = self.fp.readline(length) |
| 58 | if len(data) < length: |
| 59 | length = len(data) |
| 60 | self.pos = self.pos + length |
| 61 | return data |
| 62 | |
| 63 | def tell(self): |
| 64 | return self.pos - self.start |
| 65 | |
| 66 | def seek(self, pos): |
| 67 | self.pos = pos + self.start |
| 68 | |
| 69 | def close(self): |
| 70 | pass |
| 71 | |
| 72 | class UnixMailbox(_Mailbox): |
| 73 | def _search_start(self): |
| 74 | while 1: |
| 75 | line = self.fp.readline() |
| 76 | if not line: |
| 77 | raise EOFError |
| 78 | if line[:5] == 'From ': |
| 79 | return |
| 80 | |
| 81 | def _search_end(self): |
| 82 | while 1: |
| 83 | pos = self.fp.tell() |
| 84 | line = self.fp.readline() |
| 85 | if not line: |
| 86 | return |
| 87 | if line[:5] == 'From ': |
| 88 | self.fp.seek(pos) |
| 89 | return |
| 90 | |
| 91 | class MmdfMailbox(_Mailbox): |
| 92 | def _search_start(self): |
| 93 | while 1: |
| 94 | line = self.fp.readline() |
| 95 | if not line: |
| 96 | raise EOFError |
| 97 | if line[:5] == '\001\001\001\001\n': |
| 98 | return |
| 99 | |
| 100 | def _search_end(self): |
| 101 | while 1: |
| 102 | pos = self.fp.tell() |
| 103 | line = self.fp.readline() |
| 104 | if not line: |
| 105 | return |
| 106 | if line == '\001\001\001\001\n': |
| 107 | self.fp.seek(pos) |
| 108 | return |
| 109 | |
| 110 | if __name__ == '__main__': |
| 111 | import posix |
| 112 | import time |
| 113 | import sys |
| 114 | import string |
| 115 | mbox = '/usr/mail/'+posix.environ['USER'] |
| 116 | fp = open(mbox, 'r') |
| 117 | mb = UnixMailbox(fp) |
| 118 | msgs = [] |
| 119 | while 1: |
| 120 | msg = mb.next() |
| 121 | if not msg: |
| 122 | break |
| 123 | msgs.append(msg) |
| 124 | if len(sys.argv) > 1: |
| 125 | num = string.atoi(sys.argv[1]) |
| 126 | print 'Message %d body:'%num |
| 127 | msg = msgs[num-1] |
| 128 | msg.rewindbody() |
| 129 | sys.stdout.write(msg.fp.read()) |
| 130 | sys.exit(0) |
| 131 | print 'Mailbox',mbox,'has',len(msgs),'messages:' |
| 132 | for msg in msgs: |
| 133 | f = msg.getheader('from') |
| 134 | s = msg.getheader('subject') |
| 135 | d = (msg.getheader('date')) |
| 136 | print '%20.20s %18.18s %-30.30s'%(f, d[5:], s) |
| 137 | |