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61 lines
2.2 KiB
Python
61 lines
2.2 KiB
Python
# Copyright 2011 OpenStack LLC.
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# Copyright 2011, Piston Cloud Computing, Inc.
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# Copyright 2012, Rackspace
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#
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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");
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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 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 pyrax.exceptions as exc
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class ServiceCatalog(object):
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"""Helper methods for dealing with a Keystone Service Catalog."""
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def __init__(self, resource_dict):
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self.catalog = resource_dict
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def get_token(self):
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"""Extracts and returns the authentication token."""
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return self.catalog["access"]["token"]["id"]
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def url_for(self, attr=None, filter_value=None,
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service_type=None, endpoint_type="publicURL",
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service_name=None, volume_service_name=None):
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"""Fetches the public URL from the given service for
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a particular endpoint attribute. If none given, returns
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the first. See tests for sample service catalog."""
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matching_endpoints = []
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# We don't always get a service catalog back ...
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if "serviceCatalog" not in self.catalog["access"]:
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return None
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# Full catalog ...
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catalog = self.catalog["access"]["serviceCatalog"]
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for service in catalog:
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if service.get("type") != service_type:
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continue
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endpoints = service["endpoints"]
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for endpoint in endpoints:
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if not filter_value or endpoint.get(attr) == filter_value:
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endpoint["serviceName"] = service.get("name")
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matching_endpoints.append(endpoint)
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if not matching_endpoints:
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raise exc.EndpointNotFound()
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elif len(matching_endpoints) > 1:
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raise exc.AmbiguousEndpoints(endpoints=matching_endpoints)
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else:
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return matching_endpoints[0][endpoint_type]
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