68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
# Copyright 2017 FUJITSU LIMITED
|
|
#
|
|
# 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 falcon
|
|
from oslo_log import log
|
|
from oslo_middleware import base
|
|
|
|
from monasca_events_api import config
|
|
|
|
CONF = config.CONF
|
|
LOG = log.getLogger(__name__)
|
|
|
|
SUPPORTED_CONTENT_TYPES = ('application/json',)
|
|
|
|
|
|
def _validate_content_type(req):
|
|
"""Validate content type.
|
|
|
|
Function validates request against correct content type.
|
|
|
|
If Content-Type cannot be established (i.e. header is missing),
|
|
:py:class:`falcon.HTTPMissingHeader` is thrown.
|
|
If Content-Type is not **application/json**(supported contents
|
|
|
|
types are define in SUPPORTED_CONTENT_TYPES variable),
|
|
:py:class:`falcon.HTTPUnsupportedMediaType` is thrown.
|
|
|
|
:param falcon.Request req: current request
|
|
|
|
:exception: :py:class:`falcon.HTTPMissingHeader`
|
|
:exception: :py:class:`falcon.HTTPUnsupportedMediaType`
|
|
"""
|
|
content_type = req.content_type
|
|
LOG.debug('Content-type is {0}'.format(content_type))
|
|
|
|
if content_type is None or len(content_type) == 0:
|
|
raise falcon.HTTPMissingHeader('Content-Type')
|
|
|
|
if content_type not in SUPPORTED_CONTENT_TYPES:
|
|
types = ','.join(SUPPORTED_CONTENT_TYPES)
|
|
details = ('Only [{0}] are accepted as events representation'.
|
|
format(types))
|
|
raise falcon.HTTPUnsupportedMediaType(description=details)
|
|
|
|
|
|
class ValidationMiddleware(base.ConfigurableMiddleware):
|
|
"""Middleware that validates request content.
|
|
|
|
"""
|
|
|
|
@staticmethod
|
|
def process_request(req):
|
|
|
|
_validate_content_type(req)
|
|
|
|
return
|