OpenStack Orchestration (Heat)
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heat/heat/api/v1/__init__.py

160 lines
5.5 KiB

# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# 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.
import json
import urlparse
import httplib
import logging
import routes
import gettext
gettext.install('heat', unicode=1)
from heat.api.v1 import stacks
from heat.common import wsgi
from webob import Request
import webob
from heat import utils
from heat.common import context
logger = logging.getLogger(__name__)
class EC2Token(wsgi.Middleware):
"""Authenticate an EC2 request with keystone and convert to token."""
def __init__(self, app, conf, **local_conf):
self.conf = local_conf
self.application = app
@webob.dec.wsgify(RequestClass=wsgi.Request)
def __call__(self, req):
# Read request signature and access id.
logger.info("Checking AWS credentials..")
try:
signature = req.params['Signature']
access = req.params['AWSAccessKeyId']
except KeyError:
# We ignore a key error here so that we can use both
# authentication methods. Returning here just means
# the user didn't supply AWS authentication and we'll let
# the app try native keystone next.
logger.info("No AWS credentials found.")
return self.application
logger.info("AWS credentials found, checking against keystone.")
# Make a copy of args for authentication and signature verification.
auth_params = dict(req.params)
# Not part of authentication args
auth_params.pop('Signature')
# Authenticate the request.
creds = {'ec2Credentials': {'access': access,
'signature': signature,
'host': req.host,
'verb': req.method,
'path': req.path,
'params': auth_params,
}}
creds_json = None
try:
creds_json = json.dumps(creds)
except TypeError:
creds_json = json.dumps(to_primitive(creds))
headers = {'Content-Type': 'application/json'}
# Disable 'has no x member' pylint error
# for httplib and urlparse
# pylint: disable-msg=E1101
logger.info('Authenticating with %s' % self.conf['keystone_ec2_uri'])
o = urlparse.urlparse(self.conf['keystone_ec2_uri'])
if o.scheme == 'http':
conn = httplib.HTTPConnection(o.netloc)
else:
conn = httplib.HTTPSConnection(o.netloc)
conn.request('POST', o.path, body=creds_json, headers=headers)
response = conn.getresponse().read()
conn.close()
# NOTE(vish): We could save a call to keystone by
# having keystone return token, tenant,
# user, and roles from this call.
result = json.loads(response)
try:
token_id = result['access']['token']['id']
logger.info("AWS authentication successful.")
except (AttributeError, KeyError):
# FIXME: Should be 404 I think.
logger.info("AWS authentication failure.")
raise webob.exc.HTTPBadRequest()
# Authenticated!
req.headers['X-Auth-EC2-Creds'] = creds_json
req.headers['X-Auth-Token'] = token_id
req.headers['X-Auth-URL'] = self.conf['auth_uri']
req.headers['X-Auth-EC2_URL'] = self.conf['keystone_ec2_uri']
return self.application
class API(wsgi.Router):
"""
WSGI router for Heat v1 API requests.
"""
_actions = {
'list': 'ListStacks',
'create': 'CreateStack',
'describe': 'DescribeStacks',
'delete': 'DeleteStack',
'update': 'UpdateStack',
'events_list': 'DescribeStackEvents',
'validate_template': 'ValidateTemplate',
'get_template': 'GetTemplate',
'estimate_template_cost': 'EstimateTemplateCost',
'describe_stack_resource': 'DescribeStackResource',
'describe_stack_resources': 'DescribeStackResources',
'list_stack_resources': 'ListStackResources',
}
def __init__(self, conf, **local_conf):
self.conf = conf
mapper = routes.Mapper()
stacks_resource = stacks.create_resource(conf)
mapper.resource("stack", "stacks", controller=stacks_resource,
collection={'detail': 'GET'})
def conditions(action):
api_action = self._actions[action]
def action_match(environ, result):
req = Request(environ)
env_action = req.GET.get("Action")
return env_action == api_action
return {'function': action_match}
for action in self._actions:
mapper.connect("/", controller=stacks_resource, action=action,
conditions=conditions(action))
mapper.connect("/", controller=stacks_resource, action="index")
super(API, self).__init__(mapper)