Decodes input and encodes output
Currently novaclient doesn't handle properly incoming and outgoing
encode / decode process. As a solution for this, this patch implements a
decoding process for all data incoming from the user side and decodes
everything going out of the client, i.e: http requests, prints, etc.
This patch introduces a new module (strutils.py) taken from
oslo-incubator in order to use 2 of the functions present in it:
About safe_(decode|encode):
Both functions try to encode / decode the incoming text using the
stdin encoding, fallback to python's default encoding if that
returns None or to UTF-8 as the last option.
In both functions only basestring objects are accepted and they both
raise TypeError if an object of another type is passed.
About the general novaclient changes:
In order to better support non-ASCII characters, it is a good
practice to use unicode interanlly and encode everything that has to
go out. This patch aims to do that and introduces this behaviour in
the client.
Testing:
A good test (besides using tox) is to use nova client with and
without setting any locale (export LANG=).
Fixes bug: 1061156
Change-Id: I20b75e42b0c3dac89f1048faa1127253a64f86c7
changes/84/23084/6
Flaper Fesp
10 years ago
parent
39b6e00eed
commit
47e6bc25ae
@ -0,0 +1,133 @@
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 OpenStack LLC.
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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 logging
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import sys
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LOG = logging.getLogger(__name__)
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def int_from_bool_as_string(subject):
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"""
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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):
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"""
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Interpret a string as a boolean.
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Any string value in:
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('True', 'true', 'On', 'on', 'Yes', 'yes', '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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if isinstance(subject, bool):
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return subject
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if isinstance(subject, basestring):
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if subject.strip().lower() in ('true', 'on', 'yes', '1'):
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return True
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return False
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def safe_decode(text, incoming=None, errors='strict'):
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"""
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Decodes incoming str using `incoming` if they're
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not already unicode.
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:param incoming: Text's current encoding
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:param errors: Errors handling policy. See here for valid
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values http://docs.python.org/2/library/codecs.html
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:returns: text or a unicode `incoming` encoded
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representation of it.
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:raises TypeError: If text is not an isntance of basestring
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"""
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if not isinstance(text, basestring):
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raise TypeError("%s can't be decoded" % type(text))
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if isinstance(text, unicode):
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return text
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if not incoming:
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incoming = (sys.stdin.encoding or
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sys.getdefaultencoding())
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try:
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return text.decode(incoming, errors)
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except UnicodeDecodeError:
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# Note(flaper87) If we get here, it means that
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# sys.stdin.encoding / sys.getdefaultencoding
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# didn't return a suitable encoding to decode
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# text. This happens mostly when global LANG
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# var is not set correctly and there's no
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# default encoding. In this case, most likely
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# python will use ASCII or ANSI encoders as
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# default encodings but they won't be capable
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# of decoding non-ASCII characters.
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#
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# Also, UTF-8 is being used since it's an ASCII
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# extension.
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return text.decode('utf-8', errors)
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def safe_encode(text, incoming=None,
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encoding='utf-8', errors='strict'):
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"""
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Encodes incoming str/unicode using `encoding`. If
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incoming is not specified, text is expected to
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be encoded with current python's default encoding.
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(`sys.getdefaultencoding`)
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:param incoming: Text's current encoding
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:param encoding: Expected encoding for text (Default UTF-8)
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:param errors: Errors handling policy. See here for valid
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values http://docs.python.org/2/library/codecs.html
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:returns: text or a bytestring `encoding` encoded
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representation of it.
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:raises TypeError: If text is not an isntance of basestring
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"""
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if not isinstance(text, basestring):
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raise TypeError("%s can't be encoded" % type(text))
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if not incoming:
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incoming = (sys.stdin.encoding or
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sys.getdefaultencoding())
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if isinstance(text, unicode):
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return text.encode(encoding, errors)
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elif text and encoding != incoming:
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# Decode text before encoding it with `encoding`
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text = safe_decode(text, incoming, errors)
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return text.encode(encoding, errors)
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return text
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@ -1,7 +1,7 @@
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[DEFAULT]
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# The list of modules to copy from openstack-common
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modules=setup,timeutils
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modules=setup,timeutils,strutils
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# The base module to hold the copy of openstack.common
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base=novaclient
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Loading…
Reference in New Issue