source: titan/mediathek/localhoster/lib/python2.7/uu.py @ 40094

Last change on this file since 40094 was 40094, checked in by obi, 5 years ago

tithek add yoztube-dl support

File size: 6.4 KB
Line 
1#! /usr/bin/env python
2
3# Copyright 1994 by Lance Ellinghouse
4# Cathedral City, California Republic, United States of America.
5#                        All Rights Reserved
6# Permission to use, copy, modify, and distribute this software and its
7# documentation for any purpose and without fee is hereby granted,
8# provided that the above copyright notice appear in all copies and that
9# both that copyright notice and this permission notice appear in
10# supporting documentation, and that the name of Lance Ellinghouse
11# not be used in advertising or publicity pertaining to distribution
12# of the software without specific, written prior permission.
13# LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO
14# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
15# FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE
16# FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
19# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20#
21# Modified by Jack Jansen, CWI, July 1995:
22# - Use binascii module to do the actual line-by-line conversion
23#   between ascii and binary. This results in a 1000-fold speedup. The C
24#   version is still 5 times faster, though.
25# - Arguments more compliant with python standard
26
27"""Implementation of the UUencode and UUdecode functions.
28
29encode(in_file, out_file [,name, mode])
30decode(in_file [, out_file, mode])
31"""
32
33import binascii
34import os
35import sys
36
37__all__ = ["Error", "encode", "decode"]
38
39class Error(Exception):
40    pass
41
42def encode(in_file, out_file, name=None, mode=None):
43    """Uuencode file"""
44    #
45    # If in_file is a pathname open it and change defaults
46    #
47    opened_files = []
48    try:
49        if in_file == '-':
50            in_file = sys.stdin
51        elif isinstance(in_file, basestring):
52            if name is None:
53                name = os.path.basename(in_file)
54            if mode is None:
55                try:
56                    mode = os.stat(in_file).st_mode
57                except AttributeError:
58                    pass
59            in_file = open(in_file, 'rb')
60            opened_files.append(in_file)
61        #
62        # Open out_file if it is a pathname
63        #
64        if out_file == '-':
65            out_file = sys.stdout
66        elif isinstance(out_file, basestring):
67            out_file = open(out_file, 'wb')
68            opened_files.append(out_file)
69        #
70        # Set defaults for name and mode
71        #
72        if name is None:
73            name = '-'
74        if mode is None:
75            mode = 0666
76        #
77        # Write the data
78        #
79        out_file.write('begin %o %s\n' % ((mode&0777),name))
80        data = in_file.read(45)
81        while len(data) > 0:
82            out_file.write(binascii.b2a_uu(data))
83            data = in_file.read(45)
84        out_file.write(' \nend\n')
85    finally:
86        for f in opened_files:
87            f.close()
88
89
90def decode(in_file, out_file=None, mode=None, quiet=0):
91    """Decode uuencoded file"""
92    #
93    # Open the input file, if needed.
94    #
95    opened_files = []
96    if in_file == '-':
97        in_file = sys.stdin
98    elif isinstance(in_file, basestring):
99        in_file = open(in_file)
100        opened_files.append(in_file)
101    try:
102        #
103        # Read until a begin is encountered or we've exhausted the file
104        #
105        while True:
106            hdr = in_file.readline()
107            if not hdr:
108                raise Error('No valid begin line found in input file')
109            if not hdr.startswith('begin'):
110                continue
111            hdrfields = hdr.split(' ', 2)
112            if len(hdrfields) == 3 and hdrfields[0] == 'begin':
113                try:
114                    int(hdrfields[1], 8)
115                    break
116                except ValueError:
117                    pass
118        if out_file is None:
119            out_file = hdrfields[2].rstrip()
120            if os.path.exists(out_file):
121                raise Error('Cannot overwrite existing file: %s' % out_file)
122        if mode is None:
123            mode = int(hdrfields[1], 8)
124        #
125        # Open the output file
126        #
127        if out_file == '-':
128            out_file = sys.stdout
129        elif isinstance(out_file, basestring):
130            fp = open(out_file, 'wb')
131            try:
132                os.path.chmod(out_file, mode)
133            except AttributeError:
134                pass
135            out_file = fp
136            opened_files.append(out_file)
137        #
138        # Main decoding loop
139        #
140        s = in_file.readline()
141        while s and s.strip() != 'end':
142            try:
143                data = binascii.a2b_uu(s)
144            except binascii.Error, v:
145                # Workaround for broken uuencoders by /Fredrik Lundh
146                nbytes = (((ord(s[0])-32) & 63) * 4 + 5) // 3
147                data = binascii.a2b_uu(s[:nbytes])
148                if not quiet:
149                    sys.stderr.write("Warning: %s\n" % v)
150            out_file.write(data)
151            s = in_file.readline()
152        if not s:
153            raise Error('Truncated input file')
154    finally:
155        for f in opened_files:
156            f.close()
157
158def test():
159    """uuencode/uudecode main program"""
160
161    import optparse
162    parser = optparse.OptionParser(usage='usage: %prog [-d] [-t] [input [output]]')
163    parser.add_option('-d', '--decode', dest='decode', help='Decode (instead of encode)?', default=False, action='store_true')
164    parser.add_option('-t', '--text', dest='text', help='data is text, encoded format unix-compatible text?', default=False, action='store_true')
165
166    (options, args) = parser.parse_args()
167    if len(args) > 2:
168        parser.error('incorrect number of arguments')
169        sys.exit(1)
170
171    input = sys.stdin
172    output = sys.stdout
173    if len(args) > 0:
174        input = args[0]
175    if len(args) > 1:
176        output = args[1]
177
178    if options.decode:
179        if options.text:
180            if isinstance(output, basestring):
181                output = open(output, 'w')
182            else:
183                print sys.argv[0], ': cannot do -t to stdout'
184                sys.exit(1)
185        decode(input, output)
186    else:
187        if options.text:
188            if isinstance(input, basestring):
189                input = open(input, 'r')
190            else:
191                print sys.argv[0], ': cannot do -t from stdin'
192                sys.exit(1)
193        encode(input, output)
194
195if __name__ == '__main__':
196    test()
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