84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
# Copyright (c) 2012 OpenStack, LLC
|
|
#
|
|
# 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.
|
|
"""
|
|
Request Body limiting middleware.
|
|
|
|
"""
|
|
|
|
from oslo.config import cfg
|
|
import webob.dec
|
|
import webob.exc
|
|
|
|
|
|
from manila.openstack.common import log as logging
|
|
from manila import wsgi
|
|
|
|
# default request size is 112k
|
|
max_request_body_size_opt = cfg.IntOpt(
|
|
'osapi_max_request_body_size',
|
|
default=114688,
|
|
help='Maximum size for the body of a request.')
|
|
|
|
CONF = cfg.CONF
|
|
CONF.register_opt(max_request_body_size_opt)
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class LimitingReader(object):
|
|
"""Reader to limit the size of an incoming request."""
|
|
def __init__(self, data, limit):
|
|
"""Initialize LimitingReader.
|
|
|
|
:param data: Underlying data object
|
|
:param limit: maximum number of bytes the reader should allow
|
|
"""
|
|
self.data = data
|
|
self.limit = limit
|
|
self.bytes_read = 0
|
|
|
|
def __iter__(self):
|
|
for chunk in self.data:
|
|
self.bytes_read += len(chunk)
|
|
if self.bytes_read > self.limit:
|
|
msg = _("Request is too large.")
|
|
raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg)
|
|
else:
|
|
yield chunk
|
|
|
|
def read(self, i=None):
|
|
result = self.data.read(i)
|
|
self.bytes_read += len(result)
|
|
if self.bytes_read > self.limit:
|
|
msg = _("Request is too large.")
|
|
raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg)
|
|
return result
|
|
|
|
|
|
class RequestBodySizeLimiter(wsgi.Middleware):
|
|
"""Add a 'manila.context' to WSGI environ."""
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(RequestBodySizeLimiter, self).__init__(*args, **kwargs)
|
|
|
|
@webob.dec.wsgify(RequestClass=wsgi.Request)
|
|
def __call__(self, req):
|
|
if req.content_length > CONF.osapi_max_request_body_size:
|
|
msg = _("Request is too large.")
|
|
raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg)
|
|
if req.content_length is None and req.is_body_readable:
|
|
limiter = LimitingReader(req.body_file,
|
|
CONF.osapi_max_request_body_size)
|
|
req.body_file = limiter
|
|
return self.application
|