mirror of
https://github.com/python/cpython.git
synced 2025-10-31 21:51:50 +00:00
464 lines
12 KiB
Python
Executable file
464 lines
12 KiB
Python
Executable file
#! /usr/bin/env python
|
|
|
|
'''Mimification and unmimification of mail messages.
|
|
|
|
decode quoted-printable parts of a mail message or encode using
|
|
quoted-printable.
|
|
|
|
Usage:
|
|
mimify(input, output)
|
|
unmimify(input, output, decode_base64 = 0)
|
|
to encode and decode respectively. Input and output may be the name
|
|
of a file or an open file object. Only a readline() method is used
|
|
on the input file, only a write() method is used on the output file.
|
|
When using file names, the input and output file names may be the
|
|
same.
|
|
|
|
Interactive usage:
|
|
mimify.py -e [infile [outfile]]
|
|
mimify.py -d [infile [outfile]]
|
|
to encode and decode respectively. Infile defaults to standard
|
|
input and outfile to standard output.
|
|
'''
|
|
|
|
# Configure
|
|
MAXLEN = 200 # if lines longer than this, encode as quoted-printable
|
|
CHARSET = 'ISO-8859-1' # default charset for non-US-ASCII mail
|
|
QUOTE = '> ' # string replies are quoted with
|
|
# End configure
|
|
|
|
import re, string
|
|
|
|
qp = re.compile('^content-transfer-encoding:\\s*quoted-printable', re.I)
|
|
base64_re = re.compile('^content-transfer-encoding:\\s*base64', re.I)
|
|
mp = re.compile('^content-type:.*multipart/.*boundary="?([^;"\n]*)', re.I|re.S)
|
|
chrset = re.compile('^(content-type:.*charset=")(us-ascii|iso-8859-[0-9]+)(".*)', re.I|re.S)
|
|
he = re.compile('^-*\n')
|
|
mime_code = re.compile('=([0-9a-f][0-9a-f])', re.I)
|
|
mime_head = re.compile('=\\?iso-8859-1\\?q\\?([^? \t\n]+)\\?=', re.I)
|
|
repl = re.compile('^subject:\\s+re: ', re.I)
|
|
|
|
class File:
|
|
'''A simple fake file object that knows about limited
|
|
read-ahead and boundaries.
|
|
The only supported method is readline().'''
|
|
|
|
def __init__(self, file, boundary):
|
|
self.file = file
|
|
self.boundary = boundary
|
|
self.peek = None
|
|
|
|
def readline(self):
|
|
if self.peek is not None:
|
|
return ''
|
|
line = self.file.readline()
|
|
if not line:
|
|
return line
|
|
if self.boundary:
|
|
if line == self.boundary + '\n':
|
|
self.peek = line
|
|
return ''
|
|
if line == self.boundary + '--\n':
|
|
self.peek = line
|
|
return ''
|
|
return line
|
|
|
|
class HeaderFile:
|
|
def __init__(self, file):
|
|
self.file = file
|
|
self.peek = None
|
|
|
|
def readline(self):
|
|
if self.peek is not None:
|
|
line = self.peek
|
|
self.peek = None
|
|
else:
|
|
line = self.file.readline()
|
|
if not line:
|
|
return line
|
|
if he.match(line):
|
|
return line
|
|
while 1:
|
|
self.peek = self.file.readline()
|
|
if len(self.peek) == 0 or \
|
|
(self.peek[0] != ' ' and self.peek[0] != '\t'):
|
|
return line
|
|
line = line + self.peek
|
|
self.peek = None
|
|
|
|
def mime_decode(line):
|
|
'''Decode a single line of quoted-printable text to 8bit.'''
|
|
newline = ''
|
|
pos = 0
|
|
while 1:
|
|
res = mime_code.search(line, pos)
|
|
if res is None:
|
|
break
|
|
newline = newline + line[pos:res.start(0)] + \
|
|
chr(string.atoi(res.group(1), 16))
|
|
pos = res.end(0)
|
|
return newline + line[pos:]
|
|
|
|
def mime_decode_header(line):
|
|
'''Decode a header line to 8bit.'''
|
|
newline = ''
|
|
pos = 0
|
|
while 1:
|
|
res = mime_head.search(line, pos)
|
|
if res is None:
|
|
break
|
|
match = res.group(1)
|
|
# convert underscores to spaces (before =XX conversion!)
|
|
match = string.join(string.split(match, '_'), ' ')
|
|
newline = newline + line[pos:res.start(0)] + mime_decode(match)
|
|
pos = res.end(0)
|
|
return newline + line[pos:]
|
|
|
|
def unmimify_part(ifile, ofile, decode_base64 = 0):
|
|
'''Convert a quoted-printable part of a MIME mail message to 8bit.'''
|
|
multipart = None
|
|
quoted_printable = 0
|
|
is_base64 = 0
|
|
is_repl = 0
|
|
if ifile.boundary and ifile.boundary[:2] == QUOTE:
|
|
prefix = QUOTE
|
|
else:
|
|
prefix = ''
|
|
|
|
# read header
|
|
hfile = HeaderFile(ifile)
|
|
while 1:
|
|
line = hfile.readline()
|
|
if not line:
|
|
return
|
|
if prefix and line[:len(prefix)] == prefix:
|
|
line = line[len(prefix):]
|
|
pref = prefix
|
|
else:
|
|
pref = ''
|
|
line = mime_decode_header(line)
|
|
if qp.match(line):
|
|
quoted_printable = 1
|
|
continue # skip this header
|
|
if decode_base64 and base64_re.match(line):
|
|
is_base64 = 1
|
|
continue
|
|
ofile.write(pref + line)
|
|
if not prefix and repl.match(line):
|
|
# we're dealing with a reply message
|
|
is_repl = 1
|
|
mp_res = mp.match(line)
|
|
if mp_res:
|
|
multipart = '--' + mp_res.group(1)
|
|
if he.match(line):
|
|
break
|
|
if is_repl and (quoted_printable or multipart):
|
|
is_repl = 0
|
|
|
|
# read body
|
|
while 1:
|
|
line = ifile.readline()
|
|
if not line:
|
|
return
|
|
line = re.sub(mime_head, '\\1', line)
|
|
if prefix and line[:len(prefix)] == prefix:
|
|
line = line[len(prefix):]
|
|
pref = prefix
|
|
else:
|
|
pref = ''
|
|
## if is_repl and len(line) >= 4 and line[:4] == QUOTE+'--' and line[-3:] != '--\n':
|
|
## multipart = line[:-1]
|
|
while multipart:
|
|
if line == multipart + '--\n':
|
|
ofile.write(pref + line)
|
|
multipart = None
|
|
line = None
|
|
break
|
|
if line == multipart + '\n':
|
|
ofile.write(pref + line)
|
|
nifile = File(ifile, multipart)
|
|
unmimify_part(nifile, ofile, decode_base64)
|
|
line = nifile.peek
|
|
if not line:
|
|
# premature end of file
|
|
break
|
|
continue
|
|
# not a boundary between parts
|
|
break
|
|
if line and quoted_printable:
|
|
while line[-2:] == '=\n':
|
|
line = line[:-2]
|
|
newline = ifile.readline()
|
|
if newline[:len(QUOTE)] == QUOTE:
|
|
newline = newline[len(QUOTE):]
|
|
line = line + newline
|
|
line = mime_decode(line)
|
|
if line and is_base64 and not pref:
|
|
import base64
|
|
line = base64.decodestring(line)
|
|
if line:
|
|
ofile.write(pref + line)
|
|
|
|
def unmimify(infile, outfile, decode_base64 = 0):
|
|
'''Convert quoted-printable parts of a MIME mail message to 8bit.'''
|
|
if type(infile) == type(''):
|
|
ifile = open(infile)
|
|
if type(outfile) == type('') and infile == outfile:
|
|
import os
|
|
d, f = os.path.split(infile)
|
|
os.rename(infile, os.path.join(d, ',' + f))
|
|
else:
|
|
ifile = infile
|
|
if type(outfile) == type(''):
|
|
ofile = open(outfile, 'w')
|
|
else:
|
|
ofile = outfile
|
|
nifile = File(ifile, None)
|
|
unmimify_part(nifile, ofile, decode_base64)
|
|
ofile.flush()
|
|
|
|
mime_char = re.compile('[=\177-\377]') # quote these chars in body
|
|
mime_header_char = re.compile('[=?\177-\377]') # quote these in header
|
|
|
|
def mime_encode(line, header):
|
|
'''Code a single line as quoted-printable.
|
|
If header is set, quote some extra characters.'''
|
|
if header:
|
|
reg = mime_header_char
|
|
else:
|
|
reg = mime_char
|
|
newline = ''
|
|
pos = 0
|
|
if len(line) >= 5 and line[:5] == 'From ':
|
|
# quote 'From ' at the start of a line for stupid mailers
|
|
newline = string.upper('=%02x' % ord('F'))
|
|
pos = 1
|
|
while 1:
|
|
res = reg.search(line, pos)
|
|
if res is None:
|
|
break
|
|
newline = newline + line[pos:res.start(0)] + \
|
|
string.upper('=%02x' % ord(res.group(0)))
|
|
pos = res.end(0)
|
|
line = newline + line[pos:]
|
|
|
|
newline = ''
|
|
while len(line) >= 75:
|
|
i = 73
|
|
while line[i] == '=' or line[i-1] == '=':
|
|
i = i - 1
|
|
i = i + 1
|
|
newline = newline + line[:i] + '=\n'
|
|
line = line[i:]
|
|
return newline + line
|
|
|
|
mime_header = re.compile('([ \t(]|^)([-a-zA-Z0-9_+]*[\177-\377][-a-zA-Z0-9_+\177-\377]*)([ \t)]|\n)')
|
|
|
|
def mime_encode_header(line):
|
|
'''Code a single header line as quoted-printable.'''
|
|
newline = ''
|
|
pos = 0
|
|
while 1:
|
|
res = mime_header.search(line, pos)
|
|
if res is None:
|
|
break
|
|
newline = '%s%s%s=?%s?Q?%s?=%s' % \
|
|
(newline, line[pos:res.start(0)], res.group(1),
|
|
CHARSET, mime_encode(res.group(2), 1), res.group(3))
|
|
pos = res.end(0)
|
|
return newline + line[pos:]
|
|
|
|
mv = re.compile('^mime-version:', re.I)
|
|
cte = re.compile('^content-transfer-encoding:', re.I)
|
|
iso_char = re.compile('[\177-\377]')
|
|
|
|
def mimify_part(ifile, ofile, is_mime):
|
|
'''Convert an 8bit part of a MIME mail message to quoted-printable.'''
|
|
has_cte = is_qp = is_base64 = 0
|
|
multipart = None
|
|
must_quote_body = must_quote_header = has_iso_chars = 0
|
|
|
|
header = []
|
|
header_end = ''
|
|
message = []
|
|
message_end = ''
|
|
# read header
|
|
hfile = HeaderFile(ifile)
|
|
while 1:
|
|
line = hfile.readline()
|
|
if not line:
|
|
break
|
|
if not must_quote_header and iso_char.search(line):
|
|
must_quote_header = 1
|
|
if mv.match(line):
|
|
is_mime = 1
|
|
if cte.match(line):
|
|
has_cte = 1
|
|
if qp.match(line):
|
|
is_qp = 1
|
|
elif base64_re.match(line):
|
|
is_base64 = 1
|
|
mp_res = mp.match(line)
|
|
if mp_res:
|
|
multipart = '--' + mp_res.group(1)
|
|
if he.match(line):
|
|
header_end = line
|
|
break
|
|
header.append(line)
|
|
|
|
# read body
|
|
while 1:
|
|
line = ifile.readline()
|
|
if not line:
|
|
break
|
|
if multipart:
|
|
if line == multipart + '--\n':
|
|
message_end = line
|
|
break
|
|
if line == multipart + '\n':
|
|
message_end = line
|
|
break
|
|
if is_base64:
|
|
message.append(line)
|
|
continue
|
|
if is_qp:
|
|
while line[-2:] == '=\n':
|
|
line = line[:-2]
|
|
newline = ifile.readline()
|
|
if newline[:len(QUOTE)] == QUOTE:
|
|
newline = newline[len(QUOTE):]
|
|
line = line + newline
|
|
line = mime_decode(line)
|
|
message.append(line)
|
|
if not has_iso_chars:
|
|
if iso_char.search(line):
|
|
has_iso_chars = must_quote_body = 1
|
|
if not must_quote_body:
|
|
if len(line) > MAXLEN:
|
|
must_quote_body = 1
|
|
|
|
# convert and output header and body
|
|
for line in header:
|
|
if must_quote_header:
|
|
line = mime_encode_header(line)
|
|
chrset_res = chrset.match(line)
|
|
if chrset_res:
|
|
if has_iso_chars:
|
|
# change us-ascii into iso-8859-1
|
|
if string.lower(chrset_res.group(2)) == 'us-ascii':
|
|
line = '%s%s%s' % (chrset_res.group(1),
|
|
CHARSET,
|
|
chrset_res.group(3))
|
|
else:
|
|
# change iso-8859-* into us-ascii
|
|
line = '%sus-ascii%s' % chrset_res.group(1, 3)
|
|
if has_cte and cte.match(line):
|
|
line = 'Content-Transfer-Encoding: '
|
|
if is_base64:
|
|
line = line + 'base64\n'
|
|
elif must_quote_body:
|
|
line = line + 'quoted-printable\n'
|
|
else:
|
|
line = line + '7bit\n'
|
|
ofile.write(line)
|
|
if (must_quote_header or must_quote_body) and not is_mime:
|
|
ofile.write('Mime-Version: 1.0\n')
|
|
ofile.write('Content-Type: text/plain; ')
|
|
if has_iso_chars:
|
|
ofile.write('charset="%s"\n' % CHARSET)
|
|
else:
|
|
ofile.write('charset="us-ascii"\n')
|
|
if must_quote_body and not has_cte:
|
|
ofile.write('Content-Transfer-Encoding: quoted-printable\n')
|
|
ofile.write(header_end)
|
|
|
|
for line in message:
|
|
if must_quote_body:
|
|
line = mime_encode(line, 0)
|
|
ofile.write(line)
|
|
ofile.write(message_end)
|
|
|
|
line = message_end
|
|
while multipart:
|
|
if line == multipart + '--\n':
|
|
# read bit after the end of the last part
|
|
while 1:
|
|
line = ifile.readline()
|
|
if not line:
|
|
return
|
|
if must_quote_body:
|
|
line = mime_encode(line, 0)
|
|
ofile.write(line)
|
|
if line == multipart + '\n':
|
|
nifile = File(ifile, multipart)
|
|
mimify_part(nifile, ofile, 1)
|
|
line = nifile.peek
|
|
if not line:
|
|
# premature end of file
|
|
break
|
|
ofile.write(line)
|
|
continue
|
|
# unexpectedly no multipart separator--copy rest of file
|
|
while 1:
|
|
line = ifile.readline()
|
|
if not line:
|
|
return
|
|
if must_quote_body:
|
|
line = mime_encode(line, 0)
|
|
ofile.write(line)
|
|
|
|
def mimify(infile, outfile):
|
|
'''Convert 8bit parts of a MIME mail message to quoted-printable.'''
|
|
if type(infile) == type(''):
|
|
ifile = open(infile)
|
|
if type(outfile) == type('') and infile == outfile:
|
|
import os
|
|
d, f = os.path.split(infile)
|
|
os.rename(infile, os.path.join(d, ',' + f))
|
|
else:
|
|
ifile = infile
|
|
if type(outfile) == type(''):
|
|
ofile = open(outfile, 'w')
|
|
else:
|
|
ofile = outfile
|
|
nifile = File(ifile, None)
|
|
mimify_part(nifile, ofile, 0)
|
|
ofile.flush()
|
|
|
|
import sys
|
|
if __name__ == '__main__' or (len(sys.argv) > 0 and sys.argv[0] == 'mimify'):
|
|
import getopt
|
|
usage = 'Usage: mimify [-l len] -[ed] [infile [outfile]]'
|
|
|
|
decode_base64 = 0
|
|
opts, args = getopt.getopt(sys.argv[1:], 'l:edb')
|
|
if len(args) not in (0, 1, 2):
|
|
print usage
|
|
sys.exit(1)
|
|
if (('-e', '') in opts) == (('-d', '') in opts) or \
|
|
((('-b', '') in opts) and (('-d', '') not in opts)):
|
|
print usage
|
|
sys.exit(1)
|
|
for o, a in opts:
|
|
if o == '-e':
|
|
encode = mimify
|
|
elif o == '-d':
|
|
encode = unmimify
|
|
elif o == '-l':
|
|
try:
|
|
MAXLEN = string.atoi(a)
|
|
except:
|
|
print usage
|
|
sys.exit(1)
|
|
elif o == '-b':
|
|
decode_base64 = 1
|
|
if len(args) == 0:
|
|
encode_args = (sys.stdin, sys.stdout)
|
|
elif len(args) == 1:
|
|
encode_args = (args[0], sys.stdout)
|
|
else:
|
|
encode_args = (args[0], args[1])
|
|
if decode_base64:
|
|
encode_args = encode_args + (decode_base64,)
|
|
apply(encode, encode_args)
|
|
|