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cpython/Lib/uu.py /
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| #! /usr/bin/env python3 | |
| # 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], *, backtick=False) | |
| decode(in_file [, out_file, mode, quiet]) | |
| """ | |
| import binascii | |
| import os | |
| import sys | |
| __all__ = ["Error", "encode", "decode"] | |
| class Error(Exception): | |
| pass | |
| def encode(in_file, out_file, name=None, mode=None, *, backtick=False): | |
| """Uuencode file""" | |
| # | |
| # If in_file is a pathname open it and change defaults | |
| # | |
| opened_files = [] | |
| try: | |
| if in_file == '-': | |
| in_file = sys.stdin.buffer | |
| elif isinstance(in_file, str): | |
| 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.buffer | |
| elif isinstance(out_file, str): | |
| 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 = 0o666 | |
| # | |
| # Remove newline chars from name | |
| # | |
| name = name.replace('\n','\\n') | |
| name = name.replace('\r','\\r') | |
| # | |
| # Write the data | |
| # | |
| out_file.write(('begin %o %s\n' % ((mode & 0o777), name)).encode("ascii")) | |
| data = in_file.read(45) | |
| while len(data) > 0: | |
| out_file.write(binascii.b2a_uu(data, backtick=backtick)) | |
| data = in_file.read(45) | |
| if backtick: | |
| out_file.write(b'`\nend\n') | |
| else: | |
| out_file.write(b' \nend\n') | |
| finally: | |
| for f in opened_files: | |
| f.close() | |
| def decode(in_file, out_file=None, mode=None, quiet=False): | |
| """Decode uuencoded file""" | |
| # | |
| # Open the input file, if needed. | |
| # | |
| opened_files = [] | |
| if in_file == '-': | |
| in_file = sys.stdin.buffer | |
| elif isinstance(in_file, str): | |
| in_file = open(in_file, 'rb') | |
| 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(b'begin'): | |
| continue | |
| hdrfields = hdr.split(b' ', 2) | |
| if len(hdrfields) == 3 and hdrfields[0] == b'begin': | |
| try: | |
| int(hdrfields[1], 8) | |
| break | |
| except ValueError: | |
| pass | |
| if out_file is None: | |
| # If the filename isn't ASCII, what's up with that?!? | |
| out_file = hdrfields[2].rstrip(b' \t\r\n\f').decode("ascii") | |
| 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.buffer | |
| elif isinstance(out_file, str): | |
| fp = open(out_file, 'wb') | |
| os.chmod(out_file, mode) | |
| out_file = fp | |
| opened_files.append(out_file) | |
| # | |
| # Main decoding loop | |
| # | |
| s = in_file.readline() | |
| while s and s.strip(b' \t\r\n\f') != b'end': | |
| try: | |
| data = binascii.a2b_uu(s) | |
| except binascii.Error as v: | |
| # Workaround for broken uuencoders by /Fredrik Lundh | |
| nbytes = (((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) | |
| # Use the binary streams underlying stdin/stdout | |
| input = sys.stdin.buffer | |
| output = sys.stdout.buffer | |
| if len(args) > 0: | |
| input = args[0] | |
| if len(args) > 1: | |
| output = args[1] | |
| if options.decode: | |
| if options.text: | |
| if isinstance(output, str): | |
| output = open(output, 'wb') | |
| else: | |
| print(sys.argv[0], ': cannot do -t to stdout') | |
| sys.exit(1) | |
| decode(input, output) | |
| else: | |
| if options.text: | |
| if isinstance(input, str): | |
| input = open(input, 'rb') | |
| else: | |
| print(sys.argv[0], ': cannot do -t from stdin') | |
| sys.exit(1) | |
| encode(input, output) | |
| if __name__ == '__main__': | |
| test() |