Encode output for fixing UnicodeDecodeError
Current heatclient doesn't handle properly outgoing encode process. For resolving it, this patch implements a process to encode everything going out of the client, for example, prints. This patch used two new modules (gettextutils.py and strutils.py) taken from oslo-incubator in order to use safe_encode() and safe_decode(). Closes-Bug: #1249233 Change-Id: Ia8c955a80d68126cd9c1fd791bda3e331a2aa5c9
This commit is contained in:
chenxiao
parent
56f97606d8
commit
2742b33010
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 Red Hat, Inc.
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# Copyright 2013 IBM Corp.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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gettext for openstack-common modules.
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Usual usage in an openstack.common module:
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from heatclient.openstack.common.gettextutils import _
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"""
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import copy
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import gettext
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import logging
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import os
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import re
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try:
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import UserString as _userString
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except ImportError:
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import collections as _userString
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from babel import localedata
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import six
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_localedir = os.environ.get('heatclient'.upper() + '_LOCALEDIR')
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_t = gettext.translation('heatclient', localedir=_localedir, fallback=True)
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_AVAILABLE_LANGUAGES = {}
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USE_LAZY = False
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def enable_lazy():
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"""Convenience function for configuring _() to use lazy gettext
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Call this at the start of execution to enable the gettextutils._
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function to use lazy gettext functionality. This is useful if
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your project is importing _ directly instead of using the
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gettextutils.install() way of importing the _ function.
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"""
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global USE_LAZY
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USE_LAZY = True
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def _(msg):
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if USE_LAZY:
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return Message(msg, 'heatclient')
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else:
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if six.PY3:
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return _t.gettext(msg)
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return _t.ugettext(msg)
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def install(domain, lazy=False):
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"""Install a _() function using the given translation domain.
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Given a translation domain, install a _() function using gettext's
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install() function.
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The main difference from gettext.install() is that we allow
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overriding the default localedir (e.g. /usr/share/locale) using
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a translation-domain-specific environment variable (e.g.
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NOVA_LOCALEDIR).
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:param domain: the translation domain
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:param lazy: indicates whether or not to install the lazy _() function.
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The lazy _() introduces a way to do deferred translation
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of messages by installing a _ that builds Message objects,
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instead of strings, which can then be lazily translated into
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any available locale.
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"""
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if lazy:
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# NOTE(mrodden): Lazy gettext functionality.
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#
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# The following introduces a deferred way to do translations on
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# messages in OpenStack. We override the standard _() function
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# and % (format string) operation to build Message objects that can
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# later be translated when we have more information.
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#
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# Also included below is an example LocaleHandler that translates
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# Messages to an associated locale, effectively allowing many logs,
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# each with their own locale.
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def _lazy_gettext(msg):
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"""Create and return a Message object.
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Lazy gettext function for a given domain, it is a factory method
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for a project/module to get a lazy gettext function for its own
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translation domain (i.e. nova, glance, cinder, etc.)
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Message encapsulates a string so that we can translate
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it later when needed.
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"""
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return Message(msg, domain)
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from six import moves
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moves.builtins.__dict__['_'] = _lazy_gettext
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else:
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localedir = '%s_LOCALEDIR' % domain.upper()
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if six.PY3:
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gettext.install(domain,
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localedir=os.environ.get(localedir))
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else:
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gettext.install(domain,
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localedir=os.environ.get(localedir),
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unicode=True)
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class Message(_userString.UserString, object):
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"""Class used to encapsulate translatable messages."""
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def __init__(self, msg, domain):
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# _msg is the gettext msgid and should never change
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self._msg = msg
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self._left_extra_msg = ''
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self._right_extra_msg = ''
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self._locale = None
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self.params = None
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self.domain = domain
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@property
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def data(self):
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# NOTE(mrodden): this should always resolve to a unicode string
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# that best represents the state of the message currently
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localedir = os.environ.get(self.domain.upper() + '_LOCALEDIR')
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if self.locale:
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lang = gettext.translation(self.domain,
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localedir=localedir,
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languages=[self.locale],
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fallback=True)
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else:
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# use system locale for translations
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lang = gettext.translation(self.domain,
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localedir=localedir,
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fallback=True)
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if six.PY3:
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ugettext = lang.gettext
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else:
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ugettext = lang.ugettext
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full_msg = (self._left_extra_msg +
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ugettext(self._msg) +
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self._right_extra_msg)
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if self.params is not None:
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full_msg = full_msg % self.params
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return six.text_type(full_msg)
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@property
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def locale(self):
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return self._locale
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@locale.setter
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def locale(self, value):
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self._locale = value
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if not self.params:
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return
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# This Message object may have been constructed with one or more
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# Message objects as substitution parameters, given as a single
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# Message, or a tuple or Map containing some, so when setting the
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# locale for this Message we need to set it for those Messages too.
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if isinstance(self.params, Message):
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self.params.locale = value
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return
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if isinstance(self.params, tuple):
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for param in self.params:
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if isinstance(param, Message):
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param.locale = value
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return
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if isinstance(self.params, dict):
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for param in self.params.values():
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if isinstance(param, Message):
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param.locale = value
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def _save_dictionary_parameter(self, dict_param):
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full_msg = self.data
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# look for %(blah) fields in string;
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# ignore %% and deal with the
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# case where % is first character on the line
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keys = re.findall('(?:[^%]|^)?%\((\w*)\)[a-z]', full_msg)
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# if we don't find any %(blah) blocks but have a %s
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if not keys and re.findall('(?:[^%]|^)%[a-z]', full_msg):
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# apparently the full dictionary is the parameter
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params = copy.deepcopy(dict_param)
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else:
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params = {}
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for key in keys:
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try:
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params[key] = copy.deepcopy(dict_param[key])
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except TypeError:
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# cast uncopyable thing to unicode string
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params[key] = six.text_type(dict_param[key])
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return params
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def _save_parameters(self, other):
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# we check for None later to see if
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# we actually have parameters to inject,
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# so encapsulate if our parameter is actually None
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if other is None:
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self.params = (other, )
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elif isinstance(other, dict):
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self.params = self._save_dictionary_parameter(other)
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else:
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# fallback to casting to unicode,
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# this will handle the problematic python code-like
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# objects that cannot be deep-copied
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try:
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self.params = copy.deepcopy(other)
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except TypeError:
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self.params = six.text_type(other)
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return self
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# overrides to be more string-like
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def __unicode__(self):
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return self.data
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def __str__(self):
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if six.PY3:
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return self.__unicode__()
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return self.data.encode('utf-8')
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def __getstate__(self):
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to_copy = ['_msg', '_right_extra_msg', '_left_extra_msg',
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'domain', 'params', '_locale']
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new_dict = self.__dict__.fromkeys(to_copy)
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for attr in to_copy:
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new_dict[attr] = copy.deepcopy(self.__dict__[attr])
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return new_dict
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def __setstate__(self, state):
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for (k, v) in state.items():
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setattr(self, k, v)
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# operator overloads
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def __add__(self, other):
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copied = copy.deepcopy(self)
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copied._right_extra_msg += other.__str__()
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return copied
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def __radd__(self, other):
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copied = copy.deepcopy(self)
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copied._left_extra_msg += other.__str__()
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return copied
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def __mod__(self, other):
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# do a format string to catch and raise
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# any possible KeyErrors from missing parameters
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self.data % other
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copied = copy.deepcopy(self)
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return copied._save_parameters(other)
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def __mul__(self, other):
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return self.data * other
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def __rmul__(self, other):
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return other * self.data
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def __getitem__(self, key):
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return self.data[key]
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def __getslice__(self, start, end):
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return self.data.__getslice__(start, end)
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def __getattribute__(self, name):
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# NOTE(mrodden): handle lossy operations that we can't deal with yet
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# These override the UserString implementation, since UserString
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# uses our __class__ attribute to try and build a new message
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# after running the inner data string through the operation.
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# At that point, we have lost the gettext message id and can just
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# safely resolve to a string instead.
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ops = ['capitalize', 'center', 'decode', 'encode',
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'expandtabs', 'ljust', 'lstrip', 'replace', 'rjust', 'rstrip',
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'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill']
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if name in ops:
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return getattr(self.data, name)
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else:
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return _userString.UserString.__getattribute__(self, name)
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def get_available_languages(domain):
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"""Lists the available languages for the given translation domain.
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:param domain: the domain to get languages for
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"""
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if domain in _AVAILABLE_LANGUAGES:
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return copy.copy(_AVAILABLE_LANGUAGES[domain])
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localedir = '%s_LOCALEDIR' % domain.upper()
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find = lambda x: gettext.find(domain,
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localedir=os.environ.get(localedir),
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languages=[x])
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# NOTE(mrodden): en_US should always be available (and first in case
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# order matters) since our in-line message strings are en_US
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language_list = ['en_US']
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# NOTE(luisg): Babel <1.0 used a function called list(), which was
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# renamed to locale_identifiers() in >=1.0, the requirements master list
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# requires >=0.9.6, uncapped, so defensively work with both. We can remove
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# this check when the master list updates to >=1.0, and update all projects
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list_identifiers = (getattr(localedata, 'list', None) or
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getattr(localedata, 'locale_identifiers'))
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locale_identifiers = list_identifiers()
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for i in locale_identifiers:
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if find(i) is not None:
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language_list.append(i)
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_AVAILABLE_LANGUAGES[domain] = language_list
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return copy.copy(language_list)
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def get_localized_message(message, user_locale):
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"""Gets a localized version of the given message in the given locale.
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If the message is not a Message object the message is returned as-is.
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If the locale is None the message is translated to the default locale.
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:returns: the translated message in unicode, or the original message if
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it could not be translated
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"""
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translated = message
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if isinstance(message, Message):
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original_locale = message.locale
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message.locale = user_locale
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translated = six.text_type(message)
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message.locale = original_locale
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return translated
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class LocaleHandler(logging.Handler):
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"""Handler that can have a locale associated to translate Messages.
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A quick example of how to utilize the Message class above.
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LocaleHandler takes a locale and a target logging.Handler object
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to forward LogRecord objects to after translating the internal Message.
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"""
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def __init__(self, locale, target):
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"""Initialize a LocaleHandler
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:param locale: locale to use for translating messages
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:param target: logging.Handler object to forward
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LogRecord objects to after translation
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"""
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logging.Handler.__init__(self)
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self.locale = locale
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self.target = target
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def emit(self, record):
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if isinstance(record.msg, Message):
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# set the locale and resolve to a string
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record.msg.locale = self.locale
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self.target.emit(record)
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@ -0,0 +1,218 @@
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 OpenStack Foundation.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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System-level utilities and helper functions.
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"""
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import re
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import sys
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import unicodedata
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import six
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from heatclient.openstack.common.gettextutils import _ # noqa
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# Used for looking up extensions of text
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# to their 'multiplied' byte amount
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BYTE_MULTIPLIERS = {
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'': 1,
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't': 1024 ** 4,
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'g': 1024 ** 3,
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'm': 1024 ** 2,
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'k': 1024,
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}
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BYTE_REGEX = re.compile(r'(^-?\d+)(\D*)')
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TRUE_STRINGS = ('1', 't', 'true', 'on', 'y', 'yes')
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FALSE_STRINGS = ('0', 'f', 'false', 'off', 'n', 'no')
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SLUGIFY_STRIP_RE = re.compile(r"[^\w\s-]")
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SLUGIFY_HYPHENATE_RE = re.compile(r"[-\s]+")
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def int_from_bool_as_string(subject):
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"""Interpret a string as a boolean and return either 1 or 0.
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Any string value in:
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('True', 'true', 'On', 'on', '1')
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is interpreted as a boolean True.
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Useful for JSON-decoded stuff and config file parsing
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"""
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return bool_from_string(subject) and 1 or 0
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def bool_from_string(subject, strict=False):
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"""Interpret a string as a boolean.
|
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|
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A case-insensitive match is performed such that strings matching 't',
|
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'true', 'on', 'y', 'yes', or '1' are considered True and, when
|
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`strict=False`, anything else is considered False.
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|
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Useful for JSON-decoded stuff and config file parsing.
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If `strict=True`, unrecognized values, including None, will raise a
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ValueError which is useful when parsing values passed in from an API call.
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Strings yielding False are 'f', 'false', 'off', 'n', 'no', or '0'.
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"""
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if not isinstance(subject, six.string_types):
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subject = str(subject)
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lowered = subject.strip().lower()
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if lowered in TRUE_STRINGS:
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return True
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elif lowered in FALSE_STRINGS:
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return False
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elif strict:
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acceptable = ', '.join(
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"'%s'" % s for s in sorted(TRUE_STRINGS + FALSE_STRINGS))
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msg = _("Unrecognized value '%(val)s', acceptable values are:"
|
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" %(acceptable)s") % {'val': subject,
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'acceptable': acceptable}
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raise ValueError(msg)
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else:
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return False
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def safe_decode(text, incoming=None, errors='strict'):
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"""Decodes incoming str using `incoming` if they're not already unicode.
|
||||
|
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:param incoming: Text's current encoding
|
||||
:param errors: Errors handling policy. See here for valid
|
||||
values http://docs.python.org/2/library/codecs.html
|
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:returns: text or a unicode `incoming` encoded
|
||||
representation of it.
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||||
:raises TypeError: If text is not an instance of str
|
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"""
|
||||
if not isinstance(text, six.string_types):
|
||||
raise TypeError("%s can't be decoded" % type(text))
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|
||||
if isinstance(text, six.text_type):
|
||||
return text
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||||
|
||||
if not incoming:
|
||||
incoming = (sys.stdin.encoding or
|
||||
sys.getdefaultencoding())
|
||||
|
||||
try:
|
||||
return text.decode(incoming, errors)
|
||||
except UnicodeDecodeError:
|
||||
# Note(flaper87) If we get here, it means that
|
||||
# sys.stdin.encoding / sys.getdefaultencoding
|
||||
# didn't return a suitable encoding to decode
|
||||
# text. This happens mostly when global LANG
|
||||
# var is not set correctly and there's no
|
||||
# default encoding. In this case, most likely
|
||||
# python will use ASCII or ANSI encoders as
|
||||
# default encodings but they won't be capable
|
||||
# of decoding non-ASCII characters.
|
||||
#
|
||||
# Also, UTF-8 is being used since it's an ASCII
|
||||
# extension.
|
||||
return text.decode('utf-8', errors)
|
||||
|
||||
|
||||
def safe_encode(text, incoming=None,
|
||||
encoding='utf-8', errors='strict'):
|
||||
"""Encodes incoming str/unicode using `encoding`.
|
||||
|
||||
If incoming is not specified, text is expected to be encoded with
|
||||
current python's default encoding. (`sys.getdefaultencoding`)
|
||||
|
||||
:param incoming: Text's current encoding
|
||||
:param encoding: Expected encoding for text (Default UTF-8)
|
||||
:param errors: Errors handling policy. See here for valid
|
||||
values http://docs.python.org/2/library/codecs.html
|
||||
:returns: text or a bytestring `encoding` encoded
|
||||
representation of it.
|
||||
:raises TypeError: If text is not an instance of str
|
||||
"""
|
||||
if not isinstance(text, six.string_types):
|
||||
raise TypeError("%s can't be encoded" % type(text))
|
||||
|
||||
if not incoming:
|
||||
incoming = (sys.stdin.encoding or
|
||||
sys.getdefaultencoding())
|
||||
|
||||
if isinstance(text, six.text_type):
|
||||
return text.encode(encoding, errors)
|
||||
elif text and encoding != incoming:
|
||||
# Decode text before encoding it with `encoding`
|
||||
text = safe_decode(text, incoming, errors)
|
||||
return text.encode(encoding, errors)
|
||||
|
||||
return text
|
||||
|
||||
|
||||
def to_bytes(text, default=0):
|
||||
"""Converts a string into an integer of bytes.
|
||||
|
||||
Looks at the last characters of the text to determine
|
||||
what conversion is needed to turn the input text into a byte number.
|
||||
Supports "B, K(B), M(B), G(B), and T(B)". (case insensitive)
|
||||
|
||||
:param text: String input for bytes size conversion.
|
||||
:param default: Default return value when text is blank.
|
||||
|
||||
"""
|
||||
match = BYTE_REGEX.search(text)
|
||||
if match:
|
||||
magnitude = int(match.group(1))
|
||||
mult_key_org = match.group(2)
|
||||
if not mult_key_org:
|
||||
return magnitude
|
||||
elif text:
|
||||
msg = _('Invalid string format: %s') % text
|
||||
raise TypeError(msg)
|
||||
else:
|
||||
return default
|
||||
mult_key = mult_key_org.lower().replace('b', '', 1)
|
||||
multiplier = BYTE_MULTIPLIERS.get(mult_key)
|
||||
if multiplier is None:
|
||||
msg = _('Unknown byte multiplier: %s') % mult_key_org
|
||||
raise TypeError(msg)
|
||||
return magnitude * multiplier
|
||||
|
||||
|
||||
def to_slug(value, incoming=None, errors="strict"):
|
||||
"""Normalize string.
|
||||
|
||||
Convert to lowercase, remove non-word characters, and convert spaces
|
||||
to hyphens.
|
||||
|
||||
Inspired by Django's `slugify` filter.
|
||||
|
||||
:param value: Text to slugify
|
||||
:param incoming: Text's current encoding
|
||||
:param errors: Errors handling policy. See here for valid
|
||||
values http://docs.python.org/2/library/codecs.html
|
||||
:returns: slugified unicode representation of `value`
|
||||
:raises TypeError: If text is not an instance of str
|
||||
"""
|
||||
value = safe_decode(value, incoming, errors)
|
||||
# NOTE(aababilov): no need to use safe_(encode|decode) here:
|
||||
# encodings are always "ascii", error handling is always "ignore"
|
||||
# and types are always known (first: unicode; second: str)
|
||||
value = unicodedata.normalize("NFKD", value).encode(
|
||||
"ascii", "ignore").decode("ascii")
|
||||
value = SLUGIFY_STRIP_RE.sub("", value).strip().lower()
|
||||
return SLUGIFY_HYPHENATE_RE.sub("-", value)
|
||||
|
|
@ -14,9 +14,12 @@
|
|||
Command-line interface to the Heat API.
|
||||
"""
|
||||
|
||||
from __future__ import print_function
|
||||
|
||||
import argparse
|
||||
import httplib2
|
||||
import logging
|
||||
import six
|
||||
import sys
|
||||
|
||||
from keystoneclient.v2_0 import client as ksclient
|
||||
|
|
@ -25,6 +28,7 @@ import heatclient
|
|||
from heatclient import client as heat_client
|
||||
from heatclient.common import utils
|
||||
from heatclient import exc
|
||||
from heatclient.openstack.common import strutils
|
||||
|
||||
logger = logging.getLogger(__name__)
|
||||
|
||||
|
|
@ -367,7 +371,7 @@ def main():
|
|||
HeatShell().main(sys.argv[1:])
|
||||
|
||||
except Exception as e:
|
||||
print >> sys.stderr, e
|
||||
print(strutils.safe_encode(six.text_type(e)), file=sys.stderr)
|
||||
sys.exit(1)
|
||||
|
||||
if __name__ == "__main__":
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
[DEFAULT]
|
||||
|
||||
# The list of modules to copy from openstack-common
|
||||
modules=importutils
|
||||
modules=importutils,gettextutils,strutils
|
||||
module=py3kcompat
|
||||
|
||||
# The base module to hold the copy of openstack.common
|
||||
|
|
|
|||
|
|
@ -5,3 +5,4 @@ iso8601>=0.1.4
|
|||
PrettyTable>=0.6,<0.8
|
||||
python-keystoneclient>=0.4.1
|
||||
PyYAML>=3.1.0
|
||||
six>=1.4.1
|
||||
|
|
|
|||
Loading…
Reference in New Issue