native_client_sdk/src/build_tools/sdk_tools/config.py

   1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 import json
   6 import logging
   7 import urlparse
   8 from sdk_update_common import Error
   9
  10 SOURCE_WHITELIST = [
  11   'http://localhost/',  # For testing.
  12   'https://storage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk',
  13 ]
  14
  15 def IsSourceValid(url):
  16   # E1101: Instance of 'ParseResult' has no 'scheme' member
  17   # pylint: disable=E1101
  18
  19   given = urlparse.urlparse(url)
  20   for allowed_url in SOURCE_WHITELIST:
  21     allowed = urlparse.urlparse(allowed_url)
  22     if (given.scheme == allowed.scheme and
  23         given.hostname == allowed.hostname and
  24         given.path.startswith(allowed.path)):
  25       return True
  26   return False
  27
  28
  29 class Config(dict):
  30   def __init__(self, data=None):
  31     dict.__init__(self)
  32     if data:
  33       self.update(data)
  34     else:
  35       self.sources = []
  36
  37   def LoadJson(self, json_data):
  38     try:
  39       self.update(json.loads(json_data))
  40     except Exception as e:
  41       raise Error('Error reading json config:\n%s' % str(e))
  42
  43   def ToJson(self):
  44     try:
  45       return json.dumps(self, sort_keys=False, indent=2)
  46     except Exception as e:
  47       raise Error('Json encoding error writing config:\n%s' % e)
  48
  49   def __getattr__(self, name):
  50     if name in self:
  51       return self[name]
  52     else:
  53       raise AttributeError('Config does not contain: %s' % name)
  54
  55   def __setattr__(self, name, value):
  56     self[name] = value
  57
  58   def AddSource(self, source):
  59     if not IsSourceValid(source):
  60       logging.warn('Only whitelisted sources are allowed. Ignoring \"%s\".' % (
  61           source,))
  62       return
  63
  64     if source in self.sources:
  65       logging.info('Source \"%s\" already in Config.' % (source,))
  66       return
  67     self.sources.append(source)
  68
  69   def RemoveSource(self, source):
  70     if source not in self.sources:
  71       logging.warn('Source \"%s\" not in Config.' % (source,))
  72       return
  73     self.sources.remove(source)
  74
  75   def RemoveAllSources(self):
  76     if not self.sources:
  77       logging.info('No sources to remove.')
  78       return
  79     self.sources = []