home *** CD-ROM | disk | FTP | other *** search
/ linuxmafia.com 2016 / linuxmafia.com.tar / linuxmafia.com / pub / palmos / pippy-0.6beta-src.tar.gz / pippy-0.6beta-src.tar / pippy-0.6beta-src / src / Lib / mailbox.py < prev    next >
Text File  |  2000-12-21  |  10KB  |  277 lines
  1. #! /usr/bin/env python
  2.  
  3. """Classes to handle Unix style, MMDF style, and MH style mailboxes."""
  4.  
  5.  
  6. import rfc822
  7. import os
  8.  
  9. class _Mailbox:
  10.  
  11.         def __init__(self, fp):
  12.                 self.fp = fp
  13.                 self.seekp = 0
  14.  
  15.         def seek(self, pos, whence=0):
  16.                 if whence==1:           # Relative to current position
  17.                         self.pos = self.pos + pos
  18.                 if whence==2:           # Relative to file's end
  19.                         self.pos = self.stop + pos
  20.                 else:                   # Default - absolute position
  21.                         self.pos = self.start + pos
  22.  
  23.         def next(self):
  24.                 while 1:
  25.                         self.fp.seek(self.seekp)
  26.                         try:
  27.                                 self._search_start()
  28.                         except EOFError:
  29.                                 self.seekp = self.fp.tell()
  30.                                 return None
  31.                         start = self.fp.tell()
  32.                         self._search_end()
  33.                         self.seekp = stop = self.fp.tell()
  34.                         if start <> stop:
  35.                                 break
  36.                 return rfc822.Message(_Subfile(self.fp, start, stop))
  37.  
  38. class _Subfile:
  39.  
  40.         def __init__(self, fp, start, stop):
  41.                 self.fp = fp
  42.                 self.start = start
  43.                 self.stop = stop
  44.                 self.pos = self.start
  45.  
  46.         def read(self, length = None):
  47.                 if self.pos >= self.stop:
  48.                         return ''
  49.                 remaining = self.stop - self.pos
  50.                 if length is None or length < 0:
  51.                         length = remaining
  52.                 elif length > remaining:
  53.                         length = remaining
  54.                 self.fp.seek(self.pos)
  55.                 data = self.fp.read(length)
  56.                 self.pos = self.fp.tell()
  57.                 return data
  58.  
  59.         def readline(self, length = None):
  60.                 if self.pos >= self.stop:
  61.                         return ''
  62.                 if length is None:
  63.                         length = self.stop - self.pos
  64.                 self.fp.seek(self.pos)
  65.                 data = self.fp.readline(length)
  66.                 self.pos = self.fp.tell()
  67.                 return data
  68.  
  69.         def readlines(self, sizehint = -1):
  70.                 lines = []
  71.                 while 1:
  72.                         line = self.readline()
  73.                         if not line:
  74.                                 break
  75.                         lines.append(line)
  76.                         if sizehint >= 0:
  77.                                 sizehint = sizehint - len(line)
  78.                                 if sizehint <= 0:
  79.                                         break
  80.                 return lines
  81.  
  82.         def tell(self):
  83.                 return self.pos - self.start
  84.  
  85.         def seek(self, pos, whence=0):
  86.                 if whence == 0:
  87.                         self.pos = self.start + pos
  88.                 elif whence == 1:
  89.                         self.pos = self.pos + pos
  90.                 elif whence == 2:
  91.                         self.pos = self.stop + pos
  92.  
  93.         def close(self):
  94.                 del self.fp
  95.  
  96. class UnixMailbox(_Mailbox):
  97.  
  98.         def _search_start(self):
  99.                 while 1:
  100.                         line = self.fp.readline()
  101.                         if not line:
  102.                                 raise EOFError
  103.                         if line[:5] == 'From ' and self._isrealfromline(line):
  104.                                 return
  105.  
  106.         def _search_end(self):
  107.                 while 1:
  108.                         pos = self.fp.tell()
  109.                         line = self.fp.readline()
  110.                         if not line:
  111.                                 return
  112.                         if line[:5] == 'From ' and self._isrealfromline(line):
  113.                                 self.fp.seek(pos)
  114.                                 return
  115.  
  116.         # An overridable mechanism to test for From-line-ness.
  117.         # You can either specify a different regular expression
  118.         # or define a whole new _isrealfromline() method.
  119.         # Note that this only gets called for lines starting with
  120.         # the 5 characters "From ".
  121.  
  122.         _fromlinepattern = r"From \s*[^\s]+\s+\w\w\w\s+\w\w\w\s+\d?\d\s+" \
  123.                            r"\d?\d:\d\d(:\d\d)?(\s+[^\s]+)?\s+\d\d\d\d\s*$"
  124.         _regexp = None
  125.  
  126.         def _isrealfromline(self, line):
  127.                 if not self._regexp:
  128.                         import re
  129.                         self._regexp = re.compile(self._fromlinepattern)
  130.                 return self._regexp.match(line)
  131.  
  132. class MmdfMailbox(_Mailbox):
  133.  
  134.         def _search_start(self):
  135.                 while 1:
  136.                         line = self.fp.readline()
  137.                         if not line:
  138.                                 raise EOFError
  139.                         if line[:5] == '\001\001\001\001\n':
  140.                                 return
  141.  
  142.         def _search_end(self):
  143.                 while 1:
  144.                         pos = self.fp.tell()
  145.                         line = self.fp.readline()
  146.                         if not line:
  147.                                 return
  148.                         if line == '\001\001\001\001\n':
  149.                                 self.fp.seek(pos)
  150.                                 return
  151.  
  152. class MHMailbox:
  153.  
  154.         def __init__(self, dirname):
  155.                 import re
  156.                 pat = re.compile('^[0-9][0-9]*$')
  157.                 self.dirname = dirname
  158.                 files = os.listdir(self.dirname)
  159.                 self.boxes = []
  160.                 for f in files:
  161.                         if pat.match(f):
  162.                                 self.boxes.append(f)
  163.  
  164.         def next(self):
  165.                 if not self.boxes:
  166.                         return None
  167.                 fn = self.boxes[0]
  168.                 del self.boxes[0]
  169.                 fp = open(os.path.join(self.dirname, fn))
  170.                 return rfc822.Message(fp)
  171.  
  172. class Maildir:
  173.  
  174.         # Qmail directory mailbox
  175.  
  176.         def __init__(self, dirname):
  177.                 import string
  178.                 self.dirname = dirname
  179.                 self.boxes = []
  180.  
  181.                 # check for new mail
  182.                 newdir = os.path.join(self.dirname, 'new')
  183.                 for file in os.listdir(newdir):
  184.                         if len(string.split(file, '.')) > 2:
  185.                                 self.boxes.append(os.path.join(newdir, file))
  186.  
  187.                 # Now check for current mail in this maildir
  188.                 curdir = os.path.join(self.dirname, 'cur')
  189.                 for file in os.listdir(curdir):
  190.                         if len(string.split(file, '.')) > 2:
  191.                                 self.boxes.append(os.path.join(curdir, file))
  192.  
  193.         def next(self):
  194.                 if not self.boxes:
  195.                         return None
  196.                 fn = self.boxes[0]
  197.                 del self.boxes[0]
  198.                 fp = open(os.path.join(self.dirname, fn))
  199.                 return rfc822.Message(fp)
  200.  
  201. class BabylMailbox(_Mailbox):
  202.  
  203.         def _search_start(self):
  204.                 while 1:
  205.                         line = self.fp.readline()
  206.                         if not line:
  207.                                 raise EOFError
  208.                         if line == '*** EOOH ***\n':
  209.                                 return
  210.  
  211.         def _search_end(self):
  212.                 while 1:
  213.                         pos = self.fp.tell()
  214.                         line = self.fp.readline()
  215.                         if not line:
  216.                                 return
  217.                         if line == '\037\014\n':
  218.                                 self.fp.seek(pos)
  219.                                 return
  220.  
  221.  
  222. def _test():
  223.         import time
  224.         import sys
  225.         import string
  226.         import os
  227.  
  228.         args = sys.argv[1:]
  229.         if not args:
  230.                 for key in 'MAILDIR', 'MAIL', 'LOGNAME', 'USER':
  231.                         if os.environ.has_key(key):
  232.                                 mbox = os.environ[key]
  233.                                 break
  234.                 else:
  235.                         print "$MAIL, $LOGNAME nor $USER set -- who are you?"
  236.                         return
  237.         else:
  238.                 mbox = args[0]
  239.         if mbox[:1] == '+':
  240.                 mbox = os.environ['HOME'] + '/Mail/' + mbox[1:]
  241.         elif not '/' in mbox:
  242.                 mbox = '/usr/mail/' + mbox
  243.         if os.path.isdir(mbox):
  244.                 if os.path.isdir(os.path.join(mbox, 'cur')):
  245.                         mb = Maildir(mbox)
  246.                 else:
  247.                         mb = MHMailbox(mbox)
  248.         else:
  249.                 fp = open(mbox, 'r')
  250.                 mb = UnixMailbox(fp)
  251.         
  252.         msgs = []
  253.         while 1:
  254.                 msg = mb.next()
  255.                 if msg is None:
  256.                         break
  257.                 msgs.append(msg)
  258.                 if len(args) <= 1:
  259.                         msg.fp = None
  260.         if len(args) > 1:
  261.                 num = string.atoi(args[1])
  262.                 print 'Message %d body:'%num
  263.                 msg = msgs[num-1]
  264.                 msg.rewindbody()
  265.                 sys.stdout.write(msg.fp.read())
  266.         else:
  267.                 print 'Mailbox',mbox,'has',len(msgs),'messages:'
  268.                 for msg in msgs:
  269.                         f = msg.getheader('from') or ""
  270.                         s = msg.getheader('subject') or ""
  271.                         d = msg.getheader('date') or ""
  272.                         print '%20.20s   %18.18s   %-30.30s'%(f, d[5:], s)
  273.  
  274.  
  275. if __name__ == '__main__':
  276.         _test()
  277.