Initial checkin for new CLI and client package

Copied mostly from python-keystoneclient with some Glance-specific stuff. README.rst shows what WILL be the way to do things, not what is currently coded :)
2012-02-29 16:42:26 -05:00
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+# Copyright 2011 OpenStack LLC.
+# Copyright 2011, Piston Cloud Computing, Inc.
+# Copyright 2011 Nebula, Inc.
+#
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from glanceclient import exceptions
+
+
+class ServiceCatalog(object):
+    """
+    Helper methods for dealing with an OpenStack Identity
+    Service Catalog.
+    """
+
+    def __init__(self, resource_dict):
+        self.catalog = resource_dict
+
+    def get_token(self):
+        """Fetch token details fron service catalog"""
+        token = {'id': self.catalog['token']['id'],
+                'expires': self.catalog['token']['expires']}
+        try:
+            token['tenant'] = self.catalog['token']['tenant']['id']
+        except:
+            # just leave the tenant out if it doesn't exist
+            pass
+        return token
+
+    def url_for(self, attr=None, filter_value=None,
+                    service_type='image', endpoint_type='publicURL'):
+        """Fetch an endpoint from the service catalog.
+
+        Fetch the specified endpoint from the service catalog for
+        a particular endpoint attribute. If no attribute is given, return
+        the first endpoint of the specified type.
+
+        See tests for a sample service catalog.
+        """
+        catalog = self.catalog.get('serviceCatalog', [])
+
+        for service in catalog:
+            if service['type'] != service_type:
+                continue
+
+            endpoints = service['endpoints']
+            for endpoint in endpoints:
+                if not filter_value or endpoint.get(attr) == filter_value:
+                    return endpoint[endpoint_type]
+
+        raise exceptions.EndpointNotFound('Endpoint not found.')
+
+    def get_endpoints(self, service_type=None, endpoint_type=None):
+        """Fetch and filter endpoints for the specified service(s)
+
+        Returns endpoints for the specified service (or all) and
+        that contain the specified type (or all).
+        """
+        sc = {}
+        for service in self.catalog.get('serviceCatalog', []):
+            if service_type and service_type != service['type']:
+                continue
+            sc[service['type']] = []
+            for endpoint in service['endpoints']:
+                if endpoint_type and endpoint_type not in endpoint.keys():
+                    continue
+                sc[service['type']].append(endpoint)
+        return sc