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OpenStack Study: validator.py**** CubicPower OpenStack Study **** def _get_path_validator_regex(): # rfc3986 path validator regex from # http://jmrware.com/articles/2009/uri_regexp/URI_regex.html pchar = "([A-Za-z0-9\-._~!$&'()*+,;=:@]|%[0-9A-Fa-f]{2})" path = "((/{pchar}*)*|" path += "/({pchar}+(/{pchar}*)*)?|" path += "{pchar}+(/{pchar}*)*|" path += "{pchar}+(/{pchar}*)*|)" path = path.format(pchar=pchar) return re.compile(path) VALIDATE_PATH_RE = _get_path_validator_regex()
**** CubicPower OpenStack Study **** def validate_str(max_length=None): def _do(val): if not isinstance(val, six.string_types): return False if max_length and len(val) > max_length: return False return True return _do
**** CubicPower OpenStack Study **** def validate_int(max_value=None): def _do(val): if not isinstance(val, int): return False if max_value and val > max_value: return False return True return _do
**** CubicPower OpenStack Study **** def validate_url_path(val): """True if val is matched by the path component grammar in rfc3986.""" if not validate_str()(val): return False return VALIDATE_PATH_RE.match(val).end() == len(val)
**** CubicPower OpenStack Study **** def validate_image_path(val): if not validate_str()(val): return False bucket_name = val.split('/')[0] manifest_path = val[len(bucket_name) + 1:] if not len(bucket_name) or not len(manifest_path): return False if val[0] == '/': return False # make sure the image path if rfc3986 compliant # prepend '/' to make input validate if not validate_url_path('/' + val): return False return True
**** CubicPower OpenStack Study **** def validate_user_data(user_data): """Check if the user_data is encoded properly.""" try: user_data = base64.b64decode(user_data) except TypeError: return False return True
**** CubicPower OpenStack Study **** def validate(args, validator): """Validate values of args against validators in validator. :param args: Dict of values to be validated. :param validator: A dict where the keys map to keys in args and the values are validators. Applies each validator to ``args[key]`` :returns: True if validation succeeds. Otherwise False. A validator should be a callable which accepts 1 argument and which returns True if the argument passes validation. False otherwise. A validator should not raise an exception to indicate validity of the argument. Only validates keys which show up in both args and validator. """ for key in validator: if key not in args: continue f = validator[key] assert callable(f) if not f(args[key]): LOG.debug(_("%(key)s with value %(value)s failed" " validator %(name)s"), {'key': key, 'value': args[key], 'name': f.__name__}) return False return True
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