fe9c622e2d
Decode base64 before printing so that meteos-ui does not need to decode. Change-Id: If0a3d8589f953fe8840375727878ebdd71c6a75d
285 lines
8.1 KiB
Python
285 lines
8.1 KiB
Python
# Copyright (c) 2013 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import base64
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import copy
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import json
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import logging
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import six
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from six.moves.urllib import parse
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from meteosclient.openstack.common._i18n import _
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LOG = logging.getLogger(__name__)
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class Resource(object):
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resource_name = 'Something'
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defaults = {}
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def __init__(self, manager, info):
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self.manager = manager
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info = info.copy()
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self._info = info
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self._set_defaults(info)
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self._add_details(info)
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def _set_defaults(self, info):
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for name, value in six.iteritems(self.defaults):
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if name not in info:
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info[name] = value
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def _add_details(self, info):
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for (k, v) in six.iteritems(info):
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try:
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setattr(self, k, v)
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self._info[k] = v
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except AttributeError:
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# In this case we already defined the attribute on the class
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pass
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def to_dict(self):
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return copy.deepcopy(self._info)
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def __str__(self):
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return '%s %s' % (self.resource_name, str(self._info))
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def _check_items(obj, searches):
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try:
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return all(getattr(obj, attr) == value for (attr, value) in searches)
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except AttributeError:
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return False
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class NotUpdated(object):
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"""A sentinel class to signal that parameter should not be updated."""
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def __repr__(self):
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return 'NotUpdated'
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class ResourceManager(object):
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resource_class = None
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def __init__(self, api):
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self.api = api
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def find(self, **kwargs):
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return [i for i in self.list() if _check_items(i, kwargs.items())]
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def find_unique(self, **kwargs):
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found = self.find(**kwargs)
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if not found:
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raise APIException(error_code=404,
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error_message=_("No matches found."))
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if len(found) > 1:
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raise APIException(error_code=409,
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error_message=_("Multiple matches found."))
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return found[0]
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def _create(self, url, data, response_key=None, dump_json=True):
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if dump_json:
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kwargs = {'json': data}
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else:
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kwargs = {'data': data}
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resp = self.api.post(url, **kwargs)
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if resp.status_code != 202 and resp.status_code != 200:
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self._raise_api_exception(resp)
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if response_key is not None:
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data = get_json(resp)[response_key]
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else:
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data = get_json(resp)
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return self.resource_class(self, data)
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def _update(self, url, data, response_key=None, dump_json=True):
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if dump_json:
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kwargs = {'json': data}
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else:
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kwargs = {'data': data}
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resp = self.api.put(url, **kwargs)
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if resp.status_code != 202:
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self._raise_api_exception(resp)
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if response_key is not None:
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data = get_json(resp)[response_key]
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else:
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data = get_json(resp)
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return self.resource_class(self, data)
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def _patch(self, url, data, response_key=None, dump_json=True):
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if dump_json:
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kwargs = {'json': data}
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else:
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kwargs = {'data': data}
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resp = self.api.patch(url, **kwargs)
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if resp.status_code != 202:
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self._raise_api_exception(resp)
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if response_key is not None:
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data = get_json(resp)[response_key]
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else:
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data = get_json(resp)
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return self.resource_class(self, data)
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def _post(self, url, data, response_key=None, dump_json=True):
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if dump_json:
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kwargs = {'json': data}
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else:
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kwargs = {'data': data}
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resp = self.api.post(url, **kwargs)
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if resp.status_code != 202 and resp.status_code != 200:
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self._raise_api_exception(resp)
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if response_key is not None:
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data = get_json(resp)[response_key]
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else:
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data = get_json(resp)
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return self.resource_class(self, data)
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def _list(self, url, response_key):
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resp = self.api.get(url)
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if resp.status_code == 200:
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data = get_json(resp)[response_key]
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return [self.resource_class(self, res)
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for res in data]
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else:
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self._raise_api_exception(resp)
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def _page(self, url, response_key, limit=None):
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resp = self.api.get(url)
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if resp.status_code == 200:
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result = get_json(resp)
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base64_params = ['args', 'params']
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data = decode_base64(result[response_key], base64_params)
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meta = result.get('markers')
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next, prev = None, None
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if meta:
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prev = meta.get('prev')
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next = meta.get('next')
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l = [self.resource_class(self, res)
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for res in data]
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return Page(l, prev, next, limit)
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else:
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self._raise_api_exception(resp)
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def _get(self, url, response_key=None):
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resp = self.api.get(url)
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if resp.status_code == 200:
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if response_key is not None:
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data = get_json(resp)[response_key]
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else:
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data = get_json(resp)
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return self.resource_class(self, data)
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else:
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self._raise_api_exception(resp)
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def _delete(self, url):
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resp = self.api.delete(url)
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if resp.status_code != 202 and resp.status_code != 204:
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self._raise_api_exception(resp)
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def _plurify_resource_name(self):
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return self.resource_class.resource_name + 's'
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def _raise_api_exception(self, resp):
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try:
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error_data = get_json(resp)
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error_msg = error_data.values()[0]
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except Exception:
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msg = _("Failed to parse response from Meteos: %s") % resp.reason
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raise APIException(
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error_code=resp.status_code,
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error_message=msg)
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raise APIException(error_code=error_msg.get("code"),
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error_name=error_data.keys()[0],
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error_message=error_msg.get("message"))
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def get_json(response):
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"""Provide backward compatibility with old versions of requests library."""
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json_field_or_function = getattr(response, 'json', None)
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if callable(json_field_or_function):
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return response.json()
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else:
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return json.loads(response.content)
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def decode_base64(data, base64_params):
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for item in data:
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for key, value in item.items():
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if key in base64_params:
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item[key] = base64.b64decode(value)
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return data
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class APIException(Exception):
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def __init__(self, error_code=None, error_name=None, error_message=None):
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super(APIException, self).__init__(error_message)
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self.error_code = error_code
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self.error_name = error_name
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self.error_message = error_message
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def get_query_string(search_opts, limit=None, marker=None, sort_by=None,
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reverse=None):
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opts = {}
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if marker is not None:
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opts['marker'] = marker
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if limit is not None:
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opts['limit'] = limit
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if sort_by is not None:
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if reverse:
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opts['sort_by'] = "-%s" % sort_by
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else:
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opts['sort_by'] = sort_by
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if search_opts is not None:
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opts.update(search_opts)
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if opts:
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qparams = sorted(opts.items(), key=lambda x: x[0])
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query_string = "?%s" % parse.urlencode(qparams, doseq=True)
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else:
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query_string = ""
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return query_string
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class Page(list):
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def __init__(self, l, prev, next, limit):
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super(Page, self).__init__(l)
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self.prev = prev
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self.next = next
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self.limit = limit
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