feedlint

   1 #!/usr/bin/env python
   2
   3 from optparse import OptionParser
   4 import sys, shutil, tempfile, urlparse
   5 import urllib2, os
   6 import logging
   7 from logging import info
   8
   9 from zeroinstall import SafeException
  10 from zeroinstall.injector import model, gpg, reader
  11
  12 version = '0.1'
  13
  14 parser = OptionParser(usage="usage: %prog [options] feed.xml")
  15 parser.add_option("-v", "--verbose", help="more verbose output", action='count')
  16 parser.add_option("-V", "--version", help="display version information", action='store_true')
  17
  18 (options, args) = parser.parse_args()
  19
  20 if options.version:
  21         print "FeedLint (zero-install) " + version
  22         print "Copyright (C) 2007 Thomas Leonard"
  23         print "This program comes with ABSOLUTELY NO WARRANTY,"
  24         print "to the extent permitted by law."
  25         print "You may redistribute copies of this program"
  26         print "under the terms of the GNU General Public License."
  27         print "For more information about these matters, see the file named COPYING."
  28         sys.exit(0)
  29
  30 if options.verbose:
  31         logger = logging.getLogger()
  32         if options.verbose == 1:
  33                 logger.setLevel(logging.INFO)
  34         else:
  35                 logger.setLevel(logging.DEBUG)
  36
  37 if len(args) < 1:
  38         parser.print_help()
  39         sys.exit(1)
  40
  41 checked = set()
  42
  43 try:
  44         to_check = [model.canonical_iface_uri(a) for a in args]
  45 except SafeException, ex:
  46         if options.verbose: raise
  47         print >>sys.stderr, ex
  48         sys.exit(1)
  49
  50 def check_key(feed, fingerprint):
  51         for line in os.popen('gpg --with-colons --list-keys %s' % s.fingerprint):
  52                 if line.startswith('pub:'):
  53                         key_id = line.split(':')[4]
  54                         break
  55         else:
  56                 raise SafeException('Failed to find key with fingerprint %s on your keyring' % fingerprint)
  57
  58         key_url = urlparse.urljoin(feed, '%s.gpg' % key_id)
  59         print "Checking", key_url
  60
  61         if key_url in checked:
  62                 info("(already checked key URL)")
  63         else:
  64                 urllib2.urlopen(key_url).read()
  65                 checked.add(key_url)
  66
  67 n_errors = 0
  68
  69 while to_check:
  70         feed = to_check.pop()
  71         if feed in checked:
  72                 info("Already checked feed %s", feed)
  73                 continue
  74
  75         checked.add(feed)
  76
  77         print "Checking", feed
  78
  79         try:
  80                 tmp = tempfile.TemporaryFile(prefix = 'feedlint-')
  81                 try:
  82                         stream = urllib2.urlopen(feed)
  83                         shutil.copyfileobj(stream, tmp)
  84                         data, sigs = gpg.check_stream(tmp)
  85
  86                         for s in sigs:
  87                                 if isinstance(s, gpg.ValidSig):
  88                                         check_key(feed, s.fingerprint)
  89                                 else:
  90                                         raise SafeException("Can't check sig: %s" % s)
  91
  92                         feed_tmp = tempfile.NamedTemporaryFile(prefix = 'feedlint-')
  93                         try:
  94                                 shutil.copyfileobj(data, feed_tmp)
  95                                 feed_tmp.seek(0)
  96                                 iface = model.Interface(feed)
  97                                 reader.update(iface, feed_tmp.name)
  98
  99                                 for f in iface.feeds:
 100                                         info("Will check feed %s", f.uri)
 101                                         to_check.append(f.uri)
 102                         finally:
 103                                 feed_tmp.close()
 104                 finally:
 105                         tmp.close()
 106         except urllib2.HTTPError, ex:
 107                 print >>sys.stderr, ex
 108                 n_errors += 1
 109         except SafeException, ex:
 110                 if options.verbose: raise
 111                 print >>sys.stderr, ex
 112                 n_errors += 1
 113
 114 if n_errors == 0:
 115         print "OK"
 116 else:
 117         print "\nERRORS FOUND:", n_errors
 118         sys.exit(1)