626 lines
24 KiB
Python
626 lines
24 KiB
Python
# Copyright (c) 2010-2012 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import unittest
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import time
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import eventlet
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import mock
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from contextlib import contextmanager
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from threading import Thread
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from test.unit import FakeLogger
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from swift.common.middleware import ratelimit
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from swift.proxy.controllers.base import get_container_memcache_key, \
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headers_to_container_info
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from swift.common.memcached import MemcacheConnectionError
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from swift.common.swob import Request
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from swift.common import utils
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class FakeMemcache(object):
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def __init__(self):
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self.store = {}
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self.error_on_incr = False
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self.init_incr_return_neg = False
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def get(self, key):
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return self.store.get(key)
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def set(self, key, value, serialize=False, time=0):
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self.store[key] = value
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return True
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def incr(self, key, delta=1, time=0):
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if self.error_on_incr:
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raise MemcacheConnectionError('Memcache restarting')
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if self.init_incr_return_neg:
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# simulate initial hit, force reset of memcache
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self.init_incr_return_neg = False
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return -10000000
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self.store[key] = int(self.store.setdefault(key, 0)) + int(delta)
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if self.store[key] < 0:
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self.store[key] = 0
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return int(self.store[key])
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def decr(self, key, delta=1, time=0):
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return self.incr(key, delta=-delta, time=time)
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@contextmanager
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def soft_lock(self, key, timeout=0, retries=5):
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yield True
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def delete(self, key):
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try:
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del self.store[key]
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except Exception:
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pass
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return True
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def mock_http_connect(response, headers=None, with_exc=False):
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class FakeConn(object):
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def __init__(self, status, headers, with_exc):
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self.status = status
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self.reason = 'Fake'
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self.host = '1.2.3.4'
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self.port = '1234'
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self.with_exc = with_exc
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self.headers = headers
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if self.headers is None:
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self.headers = {}
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def getresponse(self):
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if self.with_exc:
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raise Exception('test')
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return self
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def getheader(self, header):
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return self.headers[header]
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def read(self, amt=None):
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return ''
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def close(self):
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return
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return lambda *args, **kwargs: FakeConn(response, headers, with_exc)
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class FakeApp(object):
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def __call__(self, env, start_response):
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return ['204 No Content']
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def start_response(*args):
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pass
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time_ticker = 0
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time_override = []
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def mock_sleep(x):
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global time_ticker
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time_ticker += x
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def mock_time():
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global time_override
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global time_ticker
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if time_override:
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cur_time = time_override.pop(0)
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if cur_time is None:
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time_override = [None if i is None else i + time_ticker
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for i in time_override]
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return time_ticker
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return cur_time
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return time_ticker
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class TestRateLimit(unittest.TestCase):
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def _reset_time(self):
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global time_ticker
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time_ticker = 0
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def setUp(self):
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self.was_sleep = eventlet.sleep
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eventlet.sleep = mock_sleep
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self.was_time = time.time
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time.time = mock_time
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self._reset_time()
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def tearDown(self):
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eventlet.sleep = self.was_sleep
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time.time = self.was_time
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def _run(self, callable_func, num, rate, check_time=True):
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global time_ticker
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begin = time.time()
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for x in range(num):
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callable_func()
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end = time.time()
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total_time = float(num) / rate - 1.0 / rate # 1st request not limited
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# Allow for one second of variation in the total time.
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time_diff = abs(total_time - (end - begin))
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if check_time:
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self.assertEquals(round(total_time, 1), round(time_ticker, 1))
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return time_diff
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def test_get_maxrate(self):
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conf_dict = {'container_ratelimit_10': 200,
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'container_ratelimit_50': 100,
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'container_ratelimit_75': 30}
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test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
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test_ratelimit.logger = FakeLogger()
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self.assertEquals(ratelimit.get_maxrate(
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test_ratelimit.container_ratelimits, 0), None)
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self.assertEquals(ratelimit.get_maxrate(
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test_ratelimit.container_ratelimits, 5), None)
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self.assertEquals(ratelimit.get_maxrate(
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test_ratelimit.container_ratelimits, 10), 200)
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self.assertEquals(ratelimit.get_maxrate(
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test_ratelimit.container_ratelimits, 60), 72)
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self.assertEquals(ratelimit.get_maxrate(
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test_ratelimit.container_ratelimits, 160), 30)
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def test_get_ratelimitable_key_tuples(self):
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current_rate = 13
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conf_dict = {'account_ratelimit': current_rate,
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'container_ratelimit_3': 200}
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fake_memcache = FakeMemcache()
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fake_memcache.store[get_container_memcache_key('a', 'c')] = \
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{'object_count': '5'}
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the_app = ratelimit.filter_factory(conf_dict)(FakeApp())
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the_app.memcache_client = fake_memcache
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req = lambda: None
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req.environ = {'swift.cache': fake_memcache, 'PATH_INFO': '/v1/a/c/o'}
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with mock.patch('swift.common.middleware.ratelimit.get_account_info',
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lambda *args, **kwargs: {}):
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req.method = 'DELETE'
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self.assertEquals(len(the_app.get_ratelimitable_key_tuples(
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req, 'a', None, None)), 0)
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req.method = 'PUT'
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self.assertEquals(len(the_app.get_ratelimitable_key_tuples(
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req, 'a', 'c', None)), 1)
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req.method = 'DELETE'
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self.assertEquals(len(the_app.get_ratelimitable_key_tuples(
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req, 'a', 'c', None)), 1)
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req.method = 'GET'
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self.assertEquals(len(the_app.get_ratelimitable_key_tuples(
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req, 'a', 'c', 'o')), 0)
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req.method = 'PUT'
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self.assertEquals(len(the_app.get_ratelimitable_key_tuples(
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req, 'a', 'c', 'o')), 1)
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def get_fake_ratelimit(*args, **kwargs):
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return {'sysmeta': {'global-write-ratelimit': 10}}
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with mock.patch('swift.common.middleware.ratelimit.get_account_info',
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get_fake_ratelimit):
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req.method = 'PUT'
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self.assertEquals(len(the_app.get_ratelimitable_key_tuples(
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req, 'a', 'c', None)), 2)
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self.assertEquals(the_app.get_ratelimitable_key_tuples(
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req, 'a', 'c', None)[1], ('ratelimit/global-write/a', 10))
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def get_fake_ratelimit(*args, **kwargs):
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return {'sysmeta': {'global-write-ratelimit': 'notafloat'}}
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with mock.patch('swift.common.middleware.ratelimit.get_account_info',
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get_fake_ratelimit):
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req.method = 'PUT'
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self.assertEquals(len(the_app.get_ratelimitable_key_tuples(
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req, 'a', 'c', None)), 1)
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def test_memcached_container_info_dict(self):
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mdict = headers_to_container_info({'x-container-object-count': '45'})
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self.assertEquals(mdict['object_count'], '45')
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def test_ratelimit_old_memcache_format(self):
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current_rate = 13
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conf_dict = {'account_ratelimit': current_rate,
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'container_ratelimit_3': 200}
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fake_memcache = FakeMemcache()
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fake_memcache.store[get_container_memcache_key('a', 'c')] = \
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{'container_size': 5}
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the_app = ratelimit.filter_factory(conf_dict)(FakeApp())
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the_app.memcache_client = fake_memcache
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req = lambda: None
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req.method = 'PUT'
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req.environ = {'PATH_INFO': '/v1/a/c/o', 'swift.cache': fake_memcache}
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with mock.patch('swift.common.middleware.ratelimit.get_account_info',
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lambda *args, **kwargs: {}):
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tuples = the_app.get_ratelimitable_key_tuples(req, 'a', 'c', 'o')
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self.assertEquals(tuples, [('ratelimit/a/c', 200.0)])
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def test_account_ratelimit(self):
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current_rate = 5
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num_calls = 50
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conf_dict = {'account_ratelimit': current_rate}
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self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
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ratelimit.http_connect = mock_http_connect(204)
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with mock.patch('swift.common.middleware.ratelimit.get_container_info',
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lambda *args, **kwargs: {}):
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with mock.patch(
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'swift.common.middleware.ratelimit.get_account_info',
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lambda *args, **kwargs: {}):
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for meth, exp_time in [('DELETE', 9.8), ('GET', 0),
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('POST', 0), ('PUT', 9.8)]:
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req = Request.blank('/v/a%s/c' % meth)
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req.method = meth
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req.environ['swift.cache'] = FakeMemcache()
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make_app_call = lambda: self.test_ratelimit(req.environ,
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start_response)
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begin = time.time()
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self._run(make_app_call, num_calls, current_rate,
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check_time=bool(exp_time))
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self.assertEquals(round(time.time() - begin, 1), exp_time)
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self._reset_time()
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def test_ratelimit_set_incr(self):
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current_rate = 5
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num_calls = 50
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conf_dict = {'account_ratelimit': current_rate}
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self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
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ratelimit.http_connect = mock_http_connect(204)
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req = Request.blank('/v/a/c')
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req.method = 'PUT'
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req.environ['swift.cache'] = FakeMemcache()
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req.environ['swift.cache'].init_incr_return_neg = True
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make_app_call = lambda: self.test_ratelimit(req.environ,
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start_response)
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begin = time.time()
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with mock.patch('swift.common.middleware.ratelimit.get_account_info',
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lambda *args, **kwargs: {}):
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self._run(make_app_call, num_calls, current_rate, check_time=False)
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self.assertEquals(round(time.time() - begin, 1), 9.8)
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def test_ratelimit_whitelist(self):
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global time_ticker
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current_rate = 2
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conf_dict = {'account_ratelimit': current_rate,
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'max_sleep_time_seconds': 2,
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'account_whitelist': 'a',
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'account_blacklist': 'b'}
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self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
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ratelimit.http_connect = mock_http_connect(204)
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req = Request.blank('/v/a/c')
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req.environ['swift.cache'] = FakeMemcache()
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class rate_caller(Thread):
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def __init__(self, parent):
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Thread.__init__(self)
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self.parent = parent
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def run(self):
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self.result = self.parent.test_ratelimit(req.environ,
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start_response)
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nt = 5
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threads = []
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for i in range(nt):
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rc = rate_caller(self)
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rc.start()
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threads.append(rc)
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for thread in threads:
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thread.join()
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the_498s = [
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t for t in threads if ''.join(t.result).startswith('Slow down')]
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self.assertEquals(len(the_498s), 0)
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self.assertEquals(time_ticker, 0)
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def test_ratelimit_blacklist(self):
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global time_ticker
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current_rate = 2
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conf_dict = {'account_ratelimit': current_rate,
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'max_sleep_time_seconds': 2,
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'account_whitelist': 'a',
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'account_blacklist': 'b'}
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self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
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self.test_ratelimit.logger = FakeLogger()
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self.test_ratelimit.BLACK_LIST_SLEEP = 0
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ratelimit.http_connect = mock_http_connect(204)
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req = Request.blank('/v/b/c')
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req.environ['swift.cache'] = FakeMemcache()
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class rate_caller(Thread):
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def __init__(self, parent):
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Thread.__init__(self)
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self.parent = parent
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def run(self):
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self.result = self.parent.test_ratelimit(req.environ,
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start_response)
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nt = 5
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threads = []
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for i in range(nt):
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rc = rate_caller(self)
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rc.start()
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threads.append(rc)
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for thread in threads:
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thread.join()
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the_497s = [
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t for t in threads if ''.join(t.result).startswith('Your account')]
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self.assertEquals(len(the_497s), 5)
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self.assertEquals(time_ticker, 0)
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def test_ratelimit_max_rate_double(self):
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global time_ticker
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global time_override
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current_rate = 2
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conf_dict = {'account_ratelimit': current_rate,
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'clock_accuracy': 100,
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'max_sleep_time_seconds': 1}
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self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
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ratelimit.http_connect = mock_http_connect(204)
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self.test_ratelimit.log_sleep_time_seconds = .00001
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req = Request.blank('/v/a/c')
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req.method = 'PUT'
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req.environ['swift.cache'] = FakeMemcache()
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time_override = [0, 0, 0, 0, None]
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# simulates 4 requests coming in at same time, then sleeping
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with mock.patch('swift.common.middleware.ratelimit.get_account_info',
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lambda *args, **kwargs: {}):
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r = self.test_ratelimit(req.environ, start_response)
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], 'Slow down')
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], 'Slow down')
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], '204 No Content')
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def test_ratelimit_max_rate_double_container(self):
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global time_ticker
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global time_override
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current_rate = 2
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conf_dict = {'container_ratelimit_0': current_rate,
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'clock_accuracy': 100,
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'max_sleep_time_seconds': 1}
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self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
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ratelimit.http_connect = mock_http_connect(204)
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self.test_ratelimit.log_sleep_time_seconds = .00001
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req = Request.blank('/v/a/c/o')
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req.method = 'PUT'
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req.environ['swift.cache'] = FakeMemcache()
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req.environ['swift.cache'].set(
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get_container_memcache_key('a', 'c'),
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{'container_size': 1})
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time_override = [0, 0, 0, 0, None]
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# simulates 4 requests coming in at same time, then sleeping
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with mock.patch('swift.common.middleware.ratelimit.get_account_info',
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lambda *args, **kwargs: {}):
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r = self.test_ratelimit(req.environ, start_response)
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], 'Slow down')
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], 'Slow down')
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], '204 No Content')
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def test_ratelimit_max_rate_double_container_listing(self):
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global time_ticker
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global time_override
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current_rate = 2
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conf_dict = {'container_listing_ratelimit_0': current_rate,
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'clock_accuracy': 100,
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'max_sleep_time_seconds': 1}
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self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
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ratelimit.http_connect = mock_http_connect(204)
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self.test_ratelimit.log_sleep_time_seconds = .00001
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req = Request.blank('/v/a/c')
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req.method = 'GET'
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req.environ['swift.cache'] = FakeMemcache()
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req.environ['swift.cache'].set(
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get_container_memcache_key('a', 'c'),
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{'container_size': 1})
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time_override = [0, 0, 0, 0, None]
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# simulates 4 requests coming in at same time, then sleeping
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r = self.test_ratelimit(req.environ, start_response)
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], 'Slow down')
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], 'Slow down')
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mock_sleep(.1)
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r = self.test_ratelimit(req.environ, start_response)
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self.assertEquals(r[0], '204 No Content')
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mc = self.test_ratelimit.memcache_client
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try:
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self.test_ratelimit.memcache_client = None
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self.assertEquals(
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self.test_ratelimit.handle_ratelimit(req, 'n', 'c', None),
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None)
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finally:
|
|
self.test_ratelimit.memcache_client = mc
|
|
|
|
def test_ratelimit_max_rate_multiple_acc(self):
|
|
num_calls = 4
|
|
current_rate = 2
|
|
conf_dict = {'account_ratelimit': current_rate,
|
|
'max_sleep_time_seconds': 2}
|
|
fake_memcache = FakeMemcache()
|
|
|
|
the_app = ratelimit.filter_factory(conf_dict)(FakeApp())
|
|
the_app.memcache_client = fake_memcache
|
|
req = lambda: None
|
|
req.method = 'PUT'
|
|
req.environ = {}
|
|
|
|
class rate_caller(Thread):
|
|
|
|
def __init__(self, name):
|
|
self.myname = name
|
|
Thread.__init__(self)
|
|
|
|
def run(self):
|
|
for j in range(num_calls):
|
|
self.result = the_app.handle_ratelimit(req, self.myname,
|
|
'c', None)
|
|
|
|
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
|
|
lambda *args, **kwargs: {}):
|
|
nt = 15
|
|
begin = time.time()
|
|
threads = []
|
|
for i in range(nt):
|
|
rc = rate_caller('a%s' % i)
|
|
rc.start()
|
|
threads.append(rc)
|
|
for thread in threads:
|
|
thread.join()
|
|
|
|
time_took = time.time() - begin
|
|
self.assertEquals(1.5, round(time_took, 1))
|
|
|
|
def test_call_invalid_path(self):
|
|
env = {'REQUEST_METHOD': 'GET',
|
|
'SCRIPT_NAME': '',
|
|
'PATH_INFO': '//v1/AUTH_1234567890',
|
|
'SERVER_NAME': '127.0.0.1',
|
|
'SERVER_PORT': '80',
|
|
'swift.cache': FakeMemcache(),
|
|
'SERVER_PROTOCOL': 'HTTP/1.0'}
|
|
|
|
app = lambda *args, **kwargs: ['fake_app']
|
|
rate_mid = ratelimit.filter_factory({})(app)
|
|
|
|
class a_callable(object):
|
|
|
|
def __call__(self, *args, **kwargs):
|
|
pass
|
|
resp = rate_mid.__call__(env, a_callable())
|
|
self.assert_('fake_app' == resp[0])
|
|
|
|
def test_no_memcache(self):
|
|
current_rate = 13
|
|
num_calls = 5
|
|
conf_dict = {'account_ratelimit': current_rate}
|
|
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
|
|
ratelimit.http_connect = mock_http_connect(204)
|
|
req = Request.blank('/v/a')
|
|
req.environ['swift.cache'] = None
|
|
make_app_call = lambda: self.test_ratelimit(req.environ,
|
|
start_response)
|
|
begin = time.time()
|
|
self._run(make_app_call, num_calls, current_rate, check_time=False)
|
|
time_took = time.time() - begin
|
|
self.assertEquals(round(time_took, 1), 0) # no memcache, no limiting
|
|
|
|
def test_restarting_memcache(self):
|
|
current_rate = 2
|
|
num_calls = 5
|
|
conf_dict = {'account_ratelimit': current_rate}
|
|
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
|
|
ratelimit.http_connect = mock_http_connect(204)
|
|
req = Request.blank('/v/a/c')
|
|
req.method = 'PUT'
|
|
req.environ['swift.cache'] = FakeMemcache()
|
|
req.environ['swift.cache'].error_on_incr = True
|
|
make_app_call = lambda: self.test_ratelimit(req.environ,
|
|
start_response)
|
|
begin = time.time()
|
|
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
|
|
lambda *args, **kwargs: {}):
|
|
self._run(make_app_call, num_calls, current_rate, check_time=False)
|
|
time_took = time.time() - begin
|
|
self.assertEquals(round(time_took, 1), 0) # no memcache, no limit
|
|
|
|
|
|
class TestSwiftInfo(unittest.TestCase):
|
|
def setUp(self):
|
|
utils._swift_info = {}
|
|
utils._swift_admin_info = {}
|
|
|
|
def test_registered_defaults(self):
|
|
|
|
def check_key_is_absnet(key):
|
|
try:
|
|
swift_info[key]
|
|
except KeyError as err:
|
|
if key not in err:
|
|
raise
|
|
|
|
test_limits = {'account_ratelimit': 1,
|
|
'max_sleep_time_seconds': 60,
|
|
'container_ratelimit_0': 0,
|
|
'container_ratelimit_10': 10,
|
|
'container_ratelimit_50': 50,
|
|
'container_listing_ratelimit_0': 0,
|
|
'container_listing_ratelimit_10': 10,
|
|
'container_listing_ratelimit_50': 50}
|
|
|
|
ratelimit.filter_factory(test_limits)('have to pass in an app')
|
|
swift_info = utils.get_swift_info()
|
|
self.assertTrue('ratelimit' in swift_info)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['account_ratelimit'], 1.0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['max_sleep_time_seconds'], 60.0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_ratelimits'][0][0], 0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_ratelimits'][0][1], 0.0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_ratelimits'][1][0], 10)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_ratelimits'][1][1], 10.0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_ratelimits'][2][0], 50)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_ratelimits'][2][1], 50.0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_listing_ratelimits'][0][0], 0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_listing_ratelimits'][0][1], 0.0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_listing_ratelimits'][1][0], 10)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_listing_ratelimits'][1][1], 10.0)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_listing_ratelimits'][2][0], 50)
|
|
self.assertEqual(swift_info['ratelimit']
|
|
['container_listing_ratelimits'][2][1], 50.0)
|
|
|
|
# these were left out on purpose
|
|
for key in ['log_sleep_time_seconds', 'clock_accuracy',
|
|
'rate_buffer_seconds', 'ratelimit_whitelis',
|
|
'ratelimit_blacklist']:
|
|
check_key_is_absnet(key)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|