137 lines
4.7 KiB
Python
137 lines
4.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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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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APIRequest class
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"""
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import datetime
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# TODO(termie): replace minidom with etree
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from xml.dom import minidom
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from nova.api.ec2 import ec2utils
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from nova import exception
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from nova.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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def _underscore_to_camelcase(str):
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return ''.join([x[:1].upper() + x[1:] for x in str.split('_')])
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def _underscore_to_xmlcase(str):
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res = _underscore_to_camelcase(str)
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return res[:1].lower() + res[1:]
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def _database_to_isoformat(datetimeobj):
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"""Return a xs:dateTime parsable string from datatime."""
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return datetimeobj.strftime("%Y-%m-%dT%H:%M:%S.%f")[:-3] + 'Z'
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class APIRequest(object):
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def __init__(self, controller, action, version, args):
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self.controller = controller
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self.action = action
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self.version = version
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self.args = args
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def invoke(self, context):
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try:
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method = getattr(self.controller,
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ec2utils.camelcase_to_underscore(self.action))
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except AttributeError:
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LOG.exception(_('Unsupported API request: controller = '
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'%(controller)s, action = %(action)s'),
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{'controller': self.controller,
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'action': self.action})
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# TODO(gundlach): Raise custom exception, trap in apiserver,
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# and reraise as 400 error.
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raise exception.InvalidRequest()
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args = ec2utils.dict_from_dotted_str(self.args.items())
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for key in args.keys():
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# NOTE(vish): Turn numeric dict keys into lists
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if isinstance(args[key], dict):
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if args[key] != {} and args[key].keys()[0].isdigit():
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s = args[key].items()
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s.sort()
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args[key] = [v for k, v in s]
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result = method(context, **args)
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return self._render_response(result, context.request_id)
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def _render_response(self, response_data, request_id):
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xml = minidom.Document()
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response_el = xml.createElement(self.action + 'Response')
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response_el.setAttribute('xmlns',
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'http://ec2.amazonaws.com/doc/%s/' % self.version)
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request_id_el = xml.createElement('requestId')
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request_id_el.appendChild(xml.createTextNode(request_id))
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response_el.appendChild(request_id_el)
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if response_data is True:
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self._render_dict(xml, response_el, {'return': 'true'})
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else:
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self._render_dict(xml, response_el, response_data)
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xml.appendChild(response_el)
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response = xml.toxml()
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xml.unlink()
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# Don't write private key to log
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if self.action != "CreateKeyPair":
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LOG.debug(response)
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else:
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LOG.debug("CreateKeyPair: Return Private Key")
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return response
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def _render_dict(self, xml, el, data):
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try:
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for key in data.keys():
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val = data[key]
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el.appendChild(self._render_data(xml, key, val))
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except Exception:
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LOG.debug(data)
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raise
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def _render_data(self, xml, el_name, data):
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el_name = _underscore_to_xmlcase(el_name)
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data_el = xml.createElement(el_name)
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if isinstance(data, list):
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for item in data:
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data_el.appendChild(self._render_data(xml, 'item', item))
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elif isinstance(data, dict):
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self._render_dict(xml, data_el, data)
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elif hasattr(data, '__dict__'):
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self._render_dict(xml, data_el, data.__dict__)
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elif isinstance(data, bool):
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data_el.appendChild(xml.createTextNode(str(data).lower()))
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elif isinstance(data, datetime.datetime):
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data_el.appendChild(
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xml.createTextNode(_database_to_isoformat(data)))
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elif data is not None:
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data_el.appendChild(xml.createTextNode(str(data)))
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return data_el
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