download_checkmd5.py
Go to the documentation of this file.
1 #!/usr/bin/env python
2 
3 # Software License Agreement (BSD License)
4 #
5 # Copyright (c) 2009, Willow Garage, Inc.
6 # All rights reserved.
7 #
8 # Redistribution and use in source and binary forms, with or without
9 # modification, are permitted provided that the following conditions
10 # are met:
11 #
12 # * Redistributions of source code must retain the above copyright
13 # notice, this list of conditions and the following disclaimer.
14 # * Redistributions in binary form must reproduce the above
15 # copyright notice, this list of conditions and the following
16 # disclaimer in the documentation and/or other materials provided
17 # with the distribution.
18 # * Neither the name of Willow Garage, Inc. nor the names of its
19 # contributors may be used to endorse or promote products derived
20 # from this software without specific prior written permission.
21 #
22 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 # COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
30 # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
32 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 # POSSIBILITY OF SUCH DAMAGE.
34 
35 import hashlib
36 import os
37 import sys
38 import urllib.request
39 from optparse import OptionParser
40 
41 NAME = 'download_checkmd5.py'
42 
43 
44 def main():
45  parser = OptionParser(usage='usage: %prog URI dest [md5sum]', prog=NAME)
46  options, args = parser.parse_args()
47  md5sum = None
48  if len(args) == 2:
49  uri, dest = args
50  elif len(args) == 3:
51  uri, dest, md5sum = args
52  else:
53  parser.error('wrong number of arguments')
54 
55  # Create intermediate directories as necessary, #2970
56  d = os.path.dirname(dest)
57  if len(d) and not os.path.exists(d):
58  os.makedirs(d)
59 
60  fresh = False
61  if not os.path.exists(dest):
62  sys.stdout.write('[rosbuild] Downloading %s to %s...' % (uri, dest))
63  sys.stdout.flush()
64  urllib.request.urlretrieve(uri, dest)
65  sys.stdout.write('Done\n')
66  fresh = True
67 
68  if md5sum:
69  m = hashlib.md5(open(dest, "rb").read())
70  d = m.hexdigest()
71 
72  print('[rosbuild] Checking md5sum on %s' % (dest))
73 
74  if d != md5sum:
75  if not fresh:
76  print('[rosbuild] WARNING: md5sum mismatch (%s != %s); re-downloading file %s' % (d, md5sum, dest))
77  os.remove(dest)
78 
79  # Try one more time
80  urllib.request.urlretrieve(uri, dest)
81  m = hashlib.md5(open(dest).read())
82  d = m.hexdigest()
83 
84  if d != md5sum:
85  print('[rosbuild] ERROR: md5sum mismatch (%s != %s) on %s; aborting' % (d, md5sum, dest))
86  return 1
87 
88  return 0
89 
90 
91 if __name__ == '__main__':
92  sys.exit(main())
download_checkmd5.main
def main()
Definition: download_checkmd5.py:44


rosbuild
Author(s): Brian Gerkey, Troy Straszheim, Morgan Quigley, Dirk Thomas
autogenerated on Wed Mar 2 2022 00:52:15