86 lines
2.9 KiB
Python
86 lines
2.9 KiB
Python
# Copyright (c) 2012 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Request Body limiting middleware.
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"""
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from oslo.config import cfg
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import webob.dec
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import webob.exc
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from nova.openstack.common._i18n import _
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from nova.openstack.common.middleware import base
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from nova.openstack.common import versionutils
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# default request size is 112k
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max_req_body_size = cfg.IntOpt('max_request_body_size',
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deprecated_name='osapi_max_request_body_size',
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default=114688,
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help='The maximum body size for each '
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' request, in bytes.')
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CONF = cfg.CONF
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CONF.register_opt(max_req_body_size)
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class LimitingReader(object):
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"""Reader to limit the size of an incoming request."""
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def __init__(self, data, limit):
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"""Initiates LimitingReader object.
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:param data: Underlying data object
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:param limit: maximum number of bytes the reader should allow
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"""
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self.data = data
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self.limit = limit
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self.bytes_read = 0
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def __iter__(self):
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for chunk in self.data:
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self.bytes_read += len(chunk)
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if self.bytes_read > self.limit:
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msg = _("Request is too large.")
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raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg)
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else:
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yield chunk
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def read(self, i=None):
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result = self.data.read(i)
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self.bytes_read += len(result)
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if self.bytes_read > self.limit:
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msg = _("Request is too large.")
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raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg)
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return result
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@versionutils.deprecated(as_of=versionutils.deprecated.JUNO,
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in_favor_of='oslo.middleware.RequestBodySizeLimiter')
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class RequestBodySizeLimiter(base.Middleware):
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"""Limit the size of incoming requests."""
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@webob.dec.wsgify
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def __call__(self, req):
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if (req.content_length is not None and
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req.content_length > CONF.max_request_body_size):
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msg = _("Request is too large.")
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raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg)
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if req.content_length is None and req.is_body_readable:
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limiter = LimitingReader(req.body_file,
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CONF.max_request_body_size)
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req.body_file = limiter
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return self.application
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