113 lines
3.6 KiB
Python
113 lines
3.6 KiB
Python
#
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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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import datetime
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import functools
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from webob import exc
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import wsme
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from wsme import types as wtypes
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# TODO(pbourke): add i18n support
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_ = lambda x: x
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class APIBase(wtypes.Base):
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created_at = wsme.wsattr(datetime.datetime, readonly=True)
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"""The time in UTC at which the object is created"""
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updated_at = wsme.wsattr(datetime.datetime, readonly=True)
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"""The time in UTC at which the object is updated"""
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def as_dict(self):
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"""Render this object as a dict of its fields."""
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return dict((k, getattr(self, k))
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for k in self.fields
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if hasattr(self, k) and
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getattr(self, k) != wsme.Unset)
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def unset_fields_except(self, except_list=None):
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"""Unset fields so they don't appear in the message body.
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:param except_list: A list of fields that won't be touched.
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"""
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if except_list is None:
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except_list = []
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for k in self.as_dict():
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if k not in except_list:
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setattr(self, k, wsme.Unset)
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@functools.total_ordering
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class Version(object):
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"""API Version object."""
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string = 'X-OpenStack-Ekko-API-Version'
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"""HTTP Header string carrying the requested version"""
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min_string = 'X-OpenStack-Ekko-API-Minimum-Version'
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"""HTTP response header"""
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max_string = 'X-OpenStack-Ekko-API-Maximum-Version'
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"""HTTP response header"""
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def __init__(self, headers, default_version, latest_version):
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"""Create an API Version object from the supplied headers.
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:param headers: webob headers
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:param default_version: version to use if not specified in headers
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:param latest_version: version to use if latest is requested
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:raises: webob.HTTPNotAcceptable
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"""
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(self.major, self.minor) = Version.parse_headers(
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headers, default_version, latest_version)
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def __repr__(self):
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return '%s.%s' % (self.major, self.minor)
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@staticmethod
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def parse_headers(headers, default_version, latest_version):
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"""Determine the API version requested based on the headers supplied.
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:param headers: webob headers
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:param default_version: version to use if not specified in headers
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:param latest_version: version to use if latest is requested
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:returns: a tupe of (major, minor) version numbers
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:raises: webob.HTTPNotAcceptable
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"""
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version_str = headers.get(Version.string, default_version)
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if version_str.lower() == 'latest':
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parse_str = latest_version
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else:
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parse_str = version_str
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try:
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version = tuple(int(i) for i in parse_str.split('.'))
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except ValueError:
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version = ()
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if len(version) != 2:
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raise exc.HTTPNotAcceptable(_(
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"Invalid value for %s header") % Version.string)
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return version
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def __gt__(a, b):
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return (a.major, a.minor) > (b.major, b.minor)
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def __eq__(a, b):
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return (a.major, a.minor) == (b.major, b.minor)
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