| #! /usr/bin/env python |
| |
| # Copyright 1994 by Lance Ellinghouse |
| # Cathedral City, California Republic, United States of America. |
| # All Rights Reserved |
| # Permission to use, copy, modify, and distribute this software and its |
| # documentation for any purpose and without fee is hereby granted, |
| # provided that the above copyright notice appear in all copies and that |
| # both that copyright notice and this permission notice appear in |
| # supporting documentation, and that the name of Lance Ellinghouse |
| # not be used in advertising or publicity pertaining to distribution |
| # of the software without specific, written prior permission. |
| # LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| # THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| # FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE |
| # FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| # |
| # Modified by Jack Jansen, CWI, July 1995: |
| # - Use binascii module to do the actual line-by-line conversion |
| # between ascii and binary. This results in a 1000-fold speedup. The C |
| # version is still 5 times faster, though. |
| # - Arguments more compliant with python standard |
| |
| """Implementation of the UUencode and UUdecode functions. |
| |
| encode(in_file, out_file [,name, mode]) |
| decode(in_file [, out_file, mode]) |
| """ |
| |
| import binascii |
| import os |
| import sys |
| |
| __all__ = ["Error", "encode", "decode"] |
| |
| class Error(Exception): |
| pass |
| |
| def encode(in_file, out_file, name=None, mode=None): |
| """Uuencode file""" |
| # |
| # If in_file is a pathname open it and change defaults |
| # |
| opened_files = [] |
| try: |
| if in_file == '-': |
| in_file = sys.stdin |
| elif isinstance(in_file, basestring): |
| if name is None: |
| name = os.path.basename(in_file) |
| if mode is None: |
| try: |
| mode = os.stat(in_file).st_mode |
| except AttributeError: |
| pass |
| in_file = open(in_file, 'rb') |
| opened_files.append(in_file) |
| # |
| # Open out_file if it is a pathname |
| # |
| if out_file == '-': |
| out_file = sys.stdout |
| elif isinstance(out_file, basestring): |
| out_file = open(out_file, 'wb') |
| opened_files.append(out_file) |
| # |
| # Set defaults for name and mode |
| # |
| if name is None: |
| name = '-' |
| if mode is None: |
| mode = 0666 |
| # |
| # Write the data |
| # |
| out_file.write('begin %o %s\n' % ((mode&0777),name)) |
| data = in_file.read(45) |
| while len(data) > 0: |
| out_file.write(binascii.b2a_uu(data)) |
| data = in_file.read(45) |
| out_file.write(' \nend\n') |
| finally: |
| for f in opened_files: |
| f.close() |
| |
| |
| def decode(in_file, out_file=None, mode=None, quiet=0): |
| """Decode uuencoded file""" |
| # |
| # Open the input file, if needed. |
| # |
| opened_files = [] |
| if in_file == '-': |
| in_file = sys.stdin |
| elif isinstance(in_file, basestring): |
| in_file = open(in_file) |
| opened_files.append(in_file) |
| try: |
| # |
| # Read until a begin is encountered or we've exhausted the file |
| # |
| while True: |
| hdr = in_file.readline() |
| if not hdr: |
| raise Error('No valid begin line found in input file') |
| if not hdr.startswith('begin'): |
| continue |
| hdrfields = hdr.split(' ', 2) |
| if len(hdrfields) == 3 and hdrfields[0] == 'begin': |
| try: |
| int(hdrfields[1], 8) |
| break |
| except ValueError: |
| pass |
| if out_file is None: |
| out_file = hdrfields[2].rstrip() |
| if os.path.exists(out_file): |
| raise Error('Cannot overwrite existing file: %s' % out_file) |
| if mode is None: |
| mode = int(hdrfields[1], 8) |
| # |
| # Open the output file |
| # |
| if out_file == '-': |
| out_file = sys.stdout |
| elif isinstance(out_file, basestring): |
| fp = open(out_file, 'wb') |
| try: |
| os.path.chmod(out_file, mode) |
| except AttributeError: |
| pass |
| out_file = fp |
| opened_files.append(out_file) |
| # |
| # Main decoding loop |
| # |
| s = in_file.readline() |
| while s and s.strip() != 'end': |
| try: |
| data = binascii.a2b_uu(s) |
| except binascii.Error, v: |
| # Workaround for broken uuencoders by /Fredrik Lundh |
| nbytes = (((ord(s[0])-32) & 63) * 4 + 5) // 3 |
| data = binascii.a2b_uu(s[:nbytes]) |
| if not quiet: |
| sys.stderr.write("Warning: %s\n" % v) |
| out_file.write(data) |
| s = in_file.readline() |
| if not s: |
| raise Error('Truncated input file') |
| finally: |
| for f in opened_files: |
| f.close() |
| |
| def test(): |
| """uuencode/uudecode main program""" |
| |
| import optparse |
| parser = optparse.OptionParser(usage='usage: %prog [-d] [-t] [input [output]]') |
| parser.add_option('-d', '--decode', dest='decode', help='Decode (instead of encode)?', default=False, action='store_true') |
| parser.add_option('-t', '--text', dest='text', help='data is text, encoded format unix-compatible text?', default=False, action='store_true') |
| |
| (options, args) = parser.parse_args() |
| if len(args) > 2: |
| parser.error('incorrect number of arguments') |
| sys.exit(1) |
| |
| input = sys.stdin |
| output = sys.stdout |
| if len(args) > 0: |
| input = args[0] |
| if len(args) > 1: |
| output = args[1] |
| |
| if options.decode: |
| if options.text: |
| if isinstance(output, basestring): |
| output = open(output, 'w') |
| else: |
| print sys.argv[0], ': cannot do -t to stdout' |
| sys.exit(1) |
| decode(input, output) |
| else: |
| if options.text: |
| if isinstance(input, basestring): |
| input = open(input, 'r') |
| else: |
| print sys.argv[0], ': cannot do -t from stdin' |
| sys.exit(1) |
| encode(input, output) |
| |
| if __name__ == '__main__': |
| test() |
