1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
# 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 keystoneclient import exceptions
class ServiceCatalog(object):
"""Helper methods for dealing with a Keystone Service Catalog."""
def __init__(self, resource_dict):
self.catalog = resource_dict
def get_token(self):
"""Fetch token details from service catalog.
Returns a dictionary containing the following::
- `id`: Token's ID
- `expires`: Token's expiration
- `user_id`: Authenticated user's ID
- `tenant_id`: Authorized project's ID
"""
token = {'id': self.catalog['token']['id'],
'expires': self.catalog['token']['expires']}
try:
token['user_id'] = self.catalog['user']['id']
token['tenant_id'] = self.catalog['token']['tenant']['id']
except Exception:
# just leave the tenant and user out if it doesn't exist
pass
return token
def url_for(self, attr=None, filter_value=None,
service_type='identity', 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.
Valid endpoint types: `publicURL`, `internalURL`, `adminURL`
See tests for a sample service catalog.
"""
catalog = self.catalog.get('serviceCatalog', [])
if not catalog:
raise exceptions.EmptyCatalog('The service catalog is empty.')
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
|
