text: # Copyright (c) 2012 OpenStack Foundation
  #
  #    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 StringIO
  
  from oslo.config import cfg
  import webob
  
  import nova.api.sizelimit
  from nova import test
  
  CONF = cfg.CONF
  MAX_REQUEST_BODY_SIZE = CONF.osapi_max_request_body_size
  
  
  class TestLimitingReader(test.NoDBTestCase):
  
      def test_limiting_reader(self):
          BYTES = 1024
          bytes_read = 0
          data = StringIO.StringIO("*" * BYTES)
          for chunk in nova.api.sizelimit.LimitingReader(data, BYTES):
              bytes_read += len(chunk)
  
          self.assertEqual(bytes_read, BYTES)
  
          bytes_read = 0
          data = StringIO.StringIO("*" * BYTES)
          reader = nova.api.sizelimit.LimitingReader(data, BYTES)
          byte = reader.read(1)
          while len(byte) != 0:
              bytes_read += 1
              byte = reader.read(1)
  
          self.assertEqual(bytes_read, BYTES)
  
      def test_limiting_reader_fails(self):
          BYTES = 1024
  
          def _consume_all_iter():
              bytes_read = 0
              data = StringIO.StringIO("*" * BYTES)
              for chunk in nova.api.sizelimit.LimitingReader(data, BYTES - 1):
                  bytes_read += len(chunk)
  
          self.assertRaises(webob.exc.HTTPRequestEntityTooLarge,
                            _consume_all_iter)
  
          def _consume_all_read():
              bytes_read = 0
              data = StringIO.StringIO("*" * BYTES)
              reader = nova.api.sizelimit.LimitingReader(data, BYTES - 1)
              byte = reader.read(1)
              while len(byte) != 0:
                  bytes_read += 1
                  byte = reader.read(1)
  
          self.assertRaises(webob.exc.HTTPRequestEntityTooLarge,
                            _consume_all_read)
  
  
  class TestRequestBodySizeLimiter(test.NoDBTestCase):
  
      def setUp(self):
          super(TestRequestBodySizeLimiter, self).setUp()
  
          @webob.dec.wsgify()
          def fake_app(req):
              return webob.Response(req.body)
  
          self.middleware = nova.api.sizelimit.RequestBodySizeLimiter(fake_app)
          self.request = webob.Request.blank('/', method='POST')
  
      def test_content_length_acceptable(self):
          self.request.headers['Content-Length'] = MAX_REQUEST_BODY_SIZE
          self.request.body = "0" * MAX_REQUEST_BODY_SIZE
          response = self.request.get_response(self.middleware)
          self.assertEqual(response.status_int, 200)
  
      def test_content_length_too_large(self):
          self.request.headers['Content-Length'] = MAX_REQUEST_BODY_SIZE + 1
          self.request.body = "0" * (MAX_REQUEST_BODY_SIZE + 1)
          response = self.request.get_response(self.middleware)
          self.assertEqual(response.status_int, 413)
  
      def test_request_too_large_no_content_length(self):
          self.request.body = "0" * (MAX_REQUEST_BODY_SIZE + 1)
          self.request.headers['Content-Length'] = None
          response = self.request.get_response(self.middleware)
          self.assertEqual(response.status_int, 413)
  