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#! /usr/bin/env python
"""Classes to handle Unix style, MMDF style, and MH style mailboxes."""
import rfc822
import os
class _Mailbox:
def __init__(self, fp):
self.fp = fp
self.seekp = 0
def seek(self, pos, whence=0):
if whence==1: # Relative to current position
self.pos = self.pos + pos
if whence==2: # Relative to file's end
self.pos = self.stop + pos
else: # Default - absolute position
self.pos = self.start + pos
def next(self):
while 1:
self.fp.seek(self.seekp)
try:
self._search_start()
except EOFError:
self.seekp = self.fp.tell()
return None
start = self.fp.tell()
self._search_end()
self.seekp = stop = self.fp.tell()
if start <> stop:
break
return rfc822.Message(_Subfile(self.fp, start, stop))
class _Subfile:
def __init__(self, fp, start, stop):
self.fp = fp
self.start = start
self.stop = stop
self.pos = self.start
def read(self, length = None):
if self.pos >= self.stop:
return ''
remaining = self.stop - self.pos
if length is None or length < 0:
length = remaining
elif length > remaining:
length = remaining
self.fp.seek(self.pos)
self.pos = self.pos + length
return self.fp.read(length)
def readline(self, length = None):
if self.pos >= self.stop:
return ''
if length is None:
length = self.stop - self.pos
self.fp.seek(self.pos)
data = self.fp.readline(length)
if len(data) < length:
length = len(data)
self.pos = self.pos + length
return data
def tell(self):
return self.pos - self.start
def seek(self, pos, whence=0):
if whence == 0:
self.pos = self.start + pos
elif whence == 1:
self.pos = self.pos + pos
elif whence == 2:
self.pos = self.stop + pos
def close(self):
pass
class UnixMailbox(_Mailbox):
def _search_start(self):
while 1:
line = self.fp.readline()
if not line:
raise EOFError
if line[:5] == 'From ' and self._isrealfromline(line):
return
def _search_end(self):
while 1:
pos = self.fp.tell()
line = self.fp.readline()
if not line:
return
if line[:5] == 'From ' and self._isrealfromline(line):
self.fp.seek(pos)
return
# An overridable mechanism to test for From-line-ness.
# You can either specify a different regular expression
# or define a whole new _isrealfromline() method.
# Note that this only gets called for lines starting with
# the 5 characters "From ".
_fromlinepattern = r"From \s*[^\s]+\s+\w\w\w\s+\w\w\w\s+\d?\d\s+" \
r"\d?\d:\d\d(:\d\d)?(\s+[^\s]+)?\s+\d\d\d\d\s*$"
_regexp = None
def _isrealfromline(self, line):
if not self._regexp:
import re
self._regexp = re.compile(self._fromlinepattern)
return self._regexp.match(line)
class MmdfMailbox(_Mailbox):
def _search_start(self):
while 1:
line = self.fp.readline()
if not line:
raise EOFError
if line[:5] == '\001\001\001\001\n':
return
def _search_end(self):
while 1:
pos = self.fp.tell()
line = self.fp.readline()
if not line:
return
if line == '\001\001\001\001\n':
self.fp.seek(pos)
return
class MHMailbox:
def __init__(self, dirname):
import re
pat = re.compile('^[0-9][0-9]*$')
self.dirname = dirname
files = os.listdir(self.dirname)
self.boxes = []
for f in files:
if pat.match(f):
self.boxes.append(f)
def next(self):
if not self.boxes:
return None
fn = self.boxes[0]
del self.boxes[0]
fp = open(os.path.join(self.dirname, fn))
return rfc822.Message(fp)
class BabylMailbox(_Mailbox):
def _search_start(self):
while 1:
line = self.fp.readline()
if not line:
raise EOFError
if line == '*** EOOH ***\n':
return
def _search_end(self):
while 1:
pos = self.fp.tell()
line = self.fp.readline()
if not line:
return
if line == '\037\014\n':
self.fp.seek(pos)
return
def _test():
import time
import sys
import string
import os
args = sys.argv[1:]
if not args:
for key in 'MAIL', 'LOGNAME', 'USER':
if os.environ.has_key(key):
mbox = os.environ[key]
break
else:
print "$MAIL, $LOGNAME nor $USER set -- who are you?"
return
else:
mbox = args[0]
if mbox[:1] == '+':
mbox = os.environ['HOME'] + '/Mail/' + mbox[1:]
elif not '/' in mbox:
mbox = '/usr/mail/' + mbox
if os.path.isdir(mbox):
mb = MHMailbox(mbox)
else:
fp = open(mbox, 'r')
mb = UnixMailbox(fp)
msgs = []
while 1:
msg = mb.next()
if msg is None:
break
msgs.append(msg)
msg.fp = None
if len(args) > 1:
num = string.atoi(args[1])
print 'Message %d body:'%num
msg = msgs[num-1]
msg.rewindbody()
sys.stdout.write(msg.fp.read())
else:
print 'Mailbox',mbox,'has',len(msgs),'messages:'
for msg in msgs:
f = msg.getheader('from') or ""
s = msg.getheader('subject') or ""
d = msg.getheader('date') or ""
print '%20.20s %18.18s %-30.30s'%(f, d[5:], s)
if __name__ == '__main__':
_test()
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