sahara/sahara/api/middleware/sahara_middleware.py

113 lines
3.3 KiB
Python

# Copyright (c) 2015 Mirantis Inc.
#
# 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 flask
from oslo_config import cfg
import six
from werkzeug import exceptions as werkzeug_exceptions
from sahara.api import v10 as api_v10
from sahara.api import v11 as api_v11
from sahara.api import v2 as api_v2
from sahara import context
from sahara.utils import api as api_utils
CONF = cfg.CONF
def build_app(version_response=None):
"""App builder (wsgi).
Entry point for Sahara REST API server
"""
app = flask.Flask('sahara.api')
version_response = (version_response or
{
"versions": [
{"id": "v1.0", "status": "SUPPORTED"},
{"id": "v1.1", "status": "CURRENT"}
]
})
@app.route('/', methods=['GET'])
def version_list():
context.set_ctx(None)
return api_utils.render(version_response)
@app.teardown_request
def teardown_request(_ex=None):
context.set_ctx(None)
app.register_blueprint(api_v10.rest, url_prefix='/v1.0')
app.register_blueprint(api_v10.rest, url_prefix='/v1.1')
app.register_blueprint(api_v11.rest, url_prefix='/v1.1')
def make_json_error(ex):
status_code = (ex.code
if isinstance(ex, werkzeug_exceptions.HTTPException)
else 500)
description = (ex.description
if isinstance(ex, werkzeug_exceptions.HTTPException)
else str(ex))
return api_utils.render({'error': status_code,
'error_message': description},
status=status_code)
for code in six.iterkeys(werkzeug_exceptions.default_exceptions):
app.error_handler_spec[None][code] = make_json_error
return app
def build_v2_app():
"""App builder (wsgi).
Entry point for Experimental V2 Sahara REST API server
"""
version_response = {
"versions": [
{"id": "v1.0", "status": "SUPPORTED"},
{"id": "v1.1", "status": "CURRENT"},
{"id": "v2", "status": "EXPERIMENTAL"}
]
}
app = build_app(version_response)
api_v2.register_blueprints(app, url_prefix='/v2')
return app
class Router(object):
def __call__(self, environ, response):
return self.app(environ, response)
@classmethod
def factory(cls, global_config, **local_config):
cls.app = build_app()
return cls(**local_config)
class RouterV2(object):
def __call__(self, environ, response):
return self.app(environ, response)
@classmethod
def factory(cls, global_config, **local_config):
cls.app = build_v2_app()
return cls(**local_config)