Repository navigation
Expand file tree
/
Copy pathapi.py
More file actions
350 lines (292 loc) · 9.76 KB
/
Copy pathapi.py
File metadata and controls
350 lines (292 loc) · 9.76 KB
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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
# 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.
#
"""Base API Library"""
import simplejson as json
from keystoneclient.openstack.common.apiclient \
import exceptions as ksc_exceptions
from keystoneclient import session as ksc_session
from openstackclient.common import exceptions
class KeystoneSession(object):
"""Wrapper for the Keystone Session
Restore some requests.session.Session compatibility;
keystoneclient.session.Session.request() has the method and url
arguments swapped from the rest of the requests-using world.
"""
def __init__(
self,
session=None,
endpoint=None,
**kwargs
):
"""Base object that contains some common API objects and methods
:param Session session:
The default session to be used for making the HTTP API calls.
:param string endpoint:
The URL from the Service Catalog to be used as the base for API
requests on this API.
"""
super(KeystoneSession, self).__init__()
# a requests.Session-style interface
self.session = session
self.endpoint = endpoint
def _request(self, method, url, session=None, **kwargs):
"""Perform call into session
All API calls are funneled through this method to provide a common
place to finalize the passed URL and other things.
:param string method:
The HTTP method name, i.e. ``GET``, ``PUT``, etc
:param string url:
The API-specific portion of the URL path
:param Session session:
HTTP client session
:param kwargs:
keyword arguments passed to requests.request().
:return: the requests.Response object
"""
if not session:
session = self.session
if not session:
session = ksc_session.Session()
if self.endpoint:
if url:
url = '/'.join([self.endpoint.rstrip('/'), url.lstrip('/')])
else:
url = self.endpoint.rstrip('/')
# Why is ksc session backwards???
return session.request(url, method, **kwargs)
class BaseAPI(KeystoneSession):
"""Base API"""
def __init__(
self,
session=None,
service_type=None,
endpoint=None,
**kwargs
):
"""Base object that contains some common API objects and methods
:param Session session:
The default session to be used for making the HTTP API calls.
:param string service_type:
API name, i.e. ``identity`` or ``compute``
:param string endpoint:
The URL from the Service Catalog to be used as the base for API
requests on this API.
"""
super(BaseAPI, self).__init__(session=session, endpoint=endpoint)
self.service_type = service_type
# The basic action methods all take a Session and return dict/lists
def create(
self,
url,
session=None,
method=None,
**params
):
"""Create a new resource
:param string url:
The API-specific portion of the URL path
:param Session session:
HTTP client session
:param string method:
HTTP method (default POST)
"""
if not method:
method = 'POST'
ret = self._request(method, url, session=session, **params)
# Should this move into _requests()?
try:
return ret.json()
except json.JSONDecodeError:
return ret
def delete(
self,
url,
session=None,
**params
):
"""Delete a resource
:param string url:
The API-specific portion of the URL path
:param Session session:
HTTP client session
"""
return self._request('DELETE', url, **params)
def list(
self,
path,
session=None,
body=None,
detailed=False,
**params
):
"""Return a list of resources
GET ${ENDPOINT}/${PATH}
path is often the object's plural resource type
:param string path:
The API-specific portion of the URL path
:param Session session:
HTTP client session
:param body: data that will be encoded as JSON and passed in POST
request (GET will be sent by default)
:param bool detailed:
Adds '/details' to path for some APIs to return extended attributes
:returns:
JSON-decoded response, could be a list or a dict-wrapped-list
"""
if detailed:
path = '/'.join([path.rstrip('/'), 'details'])
if body:
ret = self._request(
'POST',
path,
# service=self.service_type,
json=body,
params=params,
)
else:
ret = self._request(
'GET',
path,
# service=self.service_type,
params=params,
)
try:
return ret.json()
except json.JSONDecodeError:
return ret
# Layered actions built on top of the basic action methods do not
# explicitly take a Session but one may still be passed in kwargs
def find_attr(
self,
path,
value=None,
attr=None,
resource=None,
):
"""Find a resource via attribute or ID
Most APIs return a list wrapped by a dict with the resource
name as key. Some APIs (Identity) return a dict when a query
string is present and there is one return value. Take steps to
unwrap these bodies and return a single dict without any resource
wrappers.
:param string path:
The API-specific portion of the URL path
:param string value:
value to search for
:param string attr:
attribute to use for resource search
:param string resource:
plural of the object resource name; defaults to path
For example:
n = find(netclient, 'network', 'networks', 'matrix')
"""
# Default attr is 'name'
if attr is None:
attr = 'name'
# Default resource is path - in many APIs they are the same
if resource is None:
resource = path
def getlist(kw):
"""Do list call, unwrap resource dict if present"""
ret = self.list(path, **kw)
if type(ret) == dict and resource in ret:
ret = ret[resource]
return ret
# Search by attribute
kwargs = {attr: value}
data = getlist(kwargs)
if type(data) == dict:
return data
if len(data) == 1:
return data[0]
if len(data) > 1:
msg = "Multiple %s exist with %s='%s'"
raise ksc_exceptions.CommandError(
msg % (resource, attr, value),
)
# Search by id
kwargs = {'id': value}
data = getlist(kwargs)
if len(data) == 1:
return data[0]
msg = "No %s with a %s or ID of '%s' found"
raise exceptions.CommandError(msg % (resource, attr, value))
def find_bulk(
self,
path,
**kwargs
):
"""Bulk load and filter locally
:param string path:
The API-specific portion of the URL path
:param kwargs:
A dict of AVPs to match - logical AND
:returns: list of resource dicts
"""
items = self.list(path)
if type(items) == dict:
# strip off the enclosing dict
key = list(items.keys())[0]
items = items[key]
ret = []
for o in items:
try:
if all(o[attr] == kwargs[attr] for attr in kwargs.keys()):
ret.append(o)
except KeyError:
continue
return ret
def find_one(
self,
path,
**kwargs
):
"""Find a resource by name or ID
:param string path:
The API-specific portion of the URL path
:returns:
resource dict
"""
bulk_list = self.find_bulk(path, **kwargs)
num_bulk = len(bulk_list)
if num_bulk == 0:
msg = "none found"
raise ksc_exceptions.NotFound(msg)
elif num_bulk > 1:
msg = "many found"
raise RuntimeError(msg)
return bulk_list[0]
def find(
self,
path,
value=None,
attr=None,
):
"""Find a single resource by name or ID
:param string path:
The API-specific portion of the URL path
:param string search:
search expression
:param string attr:
name of attribute for secondary search
"""
try:
ret = self._request('GET', "/%s/%s" % (path, value)).json()
except ksc_exceptions.NotFound:
kwargs = {attr: value}
try:
ret = self.find_one("/%s/detail" % (path), **kwargs)
except ksc_exceptions.NotFound:
msg = "%s not found" % value
raise ksc_exceptions.NotFound(msg)
return ret