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
|
# 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 oslo_config import cfg
import webob.dec
import webob.exc
import nova.api.ec2
from nova import context
from nova.openstack.common import log as logging
from nova import utils
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
def ec2_error_response(request_id, code, message, status=500):
"""Helper to construct an EC2 compatible error response."""
LOG.debug('EC2 error response: %(code)s: %(message)s',
{'code': code, 'message': message})
resp = webob.Response()
resp.status = status
resp.headers['Content-Type'] = 'text/xml'
resp.body = str('<?xml version="1.0"?>\n'
'<Response><Errors><Error><Code>%s</Code>'
'<Message>%s</Message></Error></Errors>'
'<RequestID>%s</RequestID></Response>' %
(utils.xhtml_escape(utils.utf8(code)),
utils.xhtml_escape(utils.utf8(message)),
utils.xhtml_escape(utils.utf8(request_id))))
return resp
class Fault(webob.exc.HTTPException):
"""Captures exception and return REST Response."""
def __init__(self, exception):
"""Create a response for the given webob.exc.exception."""
self.wrapped_exc = exception
@webob.dec.wsgify
def __call__(self, req):
"""Generate a WSGI response based on the exception passed to ctor."""
code = nova.api.ec2.exception_to_ec2code(self.wrapped_exc)
status = self.wrapped_exc.status_int
message = self.wrapped_exc.explanation
if status == 501:
message = "The requested function is not supported"
if 'AWSAccessKeyId' not in req.params:
raise webob.exc.HTTPBadRequest()
user_id, _sep, project_id = req.params['AWSAccessKeyId'].partition(':')
project_id = project_id or user_id
remote_address = getattr(req, 'remote_address', '127.0.0.1')
if CONF.use_forwarded_for:
remote_address = req.headers.get('X-Forwarded-For', remote_address)
ctxt = context.RequestContext(user_id,
project_id,
remote_address=remote_address)
resp = ec2_error_response(ctxt.request_id, code,
message=message, status=status)
return resp
|
