synapse-old/tests/api/test_ratelimiting.py

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

391 lines
14 KiB
Python
Raw Normal View History

from synapse.api.ratelimiting import LimitExceededError, Ratelimiter
from synapse.appservice import ApplicationService
from synapse.types import create_requester
2014-09-02 08:06:20 -06:00
from tests import unittest
2014-09-02 08:06:20 -06:00
2016-02-19 08:34:38 -07:00
class TestRatelimiter(unittest.HomeserverTestCase):
def test_allowed_via_can_do_action(self):
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=1
)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, key="test_id", _time_now_s=0)
)
self.assertTrue(allowed)
self.assertEqual(10.0, time_allowed)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, key="test_id", _time_now_s=5)
)
self.assertFalse(allowed)
self.assertEqual(10.0, time_allowed)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, key="test_id", _time_now_s=10)
)
self.assertTrue(allowed)
self.assertEqual(20.0, time_allowed)
def test_allowed_appservice_ratelimited_via_can_requester_do_action(self):
appservice = ApplicationService(
None,
id="foo",
rate_limited=True,
sender="@as:example.com",
)
as_requester = create_requester("@user:example.com", app_service=appservice)
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=1
)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(as_requester, _time_now_s=0)
)
self.assertTrue(allowed)
self.assertEqual(10.0, time_allowed)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(as_requester, _time_now_s=5)
)
self.assertFalse(allowed)
self.assertEqual(10.0, time_allowed)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(as_requester, _time_now_s=10)
)
self.assertTrue(allowed)
self.assertEqual(20.0, time_allowed)
def test_allowed_appservice_via_can_requester_do_action(self):
appservice = ApplicationService(
None,
id="foo",
rate_limited=False,
sender="@as:example.com",
)
as_requester = create_requester("@user:example.com", app_service=appservice)
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=1
)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(as_requester, _time_now_s=0)
)
self.assertTrue(allowed)
self.assertEqual(-1, time_allowed)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(as_requester, _time_now_s=5)
)
self.assertTrue(allowed)
self.assertEqual(-1, time_allowed)
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(as_requester, _time_now_s=10)
)
self.assertTrue(allowed)
self.assertEqual(-1, time_allowed)
def test_allowed_via_ratelimit(self):
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=1
)
# Shouldn't raise
self.get_success_or_raise(limiter.ratelimit(None, key="test_id", _time_now_s=0))
# Should raise
with self.assertRaises(LimitExceededError) as context:
self.get_success_or_raise(
limiter.ratelimit(None, key="test_id", _time_now_s=5)
)
self.assertEqual(context.exception.retry_after_ms, 5000)
# Shouldn't raise
self.get_success_or_raise(
limiter.ratelimit(None, key="test_id", _time_now_s=10)
)
def test_allowed_via_can_do_action_and_overriding_parameters(self):
"""Test that we can override options of can_do_action that would otherwise fail
an action
"""
# Create a Ratelimiter with a very low allowed rate_hz and burst_count
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=1
)
# First attempt should be allowed
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(
None,
("test_id",),
_time_now_s=0,
)
)
self.assertTrue(allowed)
self.assertEqual(10.0, time_allowed)
# Second attempt, 1s later, will fail
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(
None,
("test_id",),
_time_now_s=1,
)
)
self.assertFalse(allowed)
self.assertEqual(10.0, time_allowed)
# But, if we allow 10 actions/sec for this request, we should be allowed
# to continue.
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, ("test_id",), _time_now_s=1, rate_hz=10.0)
2014-09-02 08:06:20 -06:00
)
self.assertTrue(allowed)
self.assertEqual(1.1, time_allowed)
2014-09-02 08:06:20 -06:00
# Similarly if we allow a burst of 10 actions
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, ("test_id",), _time_now_s=1, burst_count=10)
2014-09-02 08:06:20 -06:00
)
self.assertTrue(allowed)
self.assertEqual(1.0, time_allowed)
def test_allowed_via_ratelimit_and_overriding_parameters(self):
"""Test that we can override options of the ratelimit method that would otherwise
fail an action
"""
# Create a Ratelimiter with a very low allowed rate_hz and burst_count
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=1
)
# First attempt should be allowed
self.get_success_or_raise(
limiter.ratelimit(None, key=("test_id",), _time_now_s=0)
)
# Second attempt, 1s later, will fail
with self.assertRaises(LimitExceededError) as context:
self.get_success_or_raise(
limiter.ratelimit(None, key=("test_id",), _time_now_s=1)
)
self.assertEqual(context.exception.retry_after_ms, 9000)
# But, if we allow 10 actions/sec for this request, we should be allowed
# to continue.
self.get_success_or_raise(
limiter.ratelimit(None, key=("test_id",), _time_now_s=1, rate_hz=10.0)
)
# Similarly if we allow a burst of 10 actions
self.get_success_or_raise(
limiter.ratelimit(None, key=("test_id",), _time_now_s=1, burst_count=10)
)
def test_pruning(self):
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=1
)
self.get_success_or_raise(
limiter.can_do_action(None, key="test_id_1", _time_now_s=0)
)
self.assertIn("test_id_1", limiter.actions)
self.get_success_or_raise(
limiter.can_do_action(None, key="test_id_2", _time_now_s=10)
)
2014-09-02 08:06:20 -06:00
self.assertNotIn("test_id_1", limiter.actions)
def test_db_user_override(self):
"""Test that users that have ratelimiting disabled in the DB aren't
ratelimited.
"""
store = self.hs.get_datastores().main
user_id = "@user:test"
requester = create_requester(user_id)
self.get_success(
store.db_pool.simple_insert(
table="ratelimit_override",
values={
"user_id": user_id,
"messages_per_second": None,
"burst_count": None,
},
desc="test_db_user_override",
)
)
limiter = Ratelimiter(store=store, clock=None, rate_hz=0.1, burst_count=1)
# Shouldn't raise
for _ in range(20):
self.get_success_or_raise(limiter.ratelimit(requester, _time_now_s=0))
def test_multiple_actions(self):
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=3
)
# Test that 4 actions aren't allowed with a maximum burst of 3.
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, key="test_id", n_actions=4, _time_now_s=0)
)
self.assertFalse(allowed)
# Test that 3 actions are allowed with a maximum burst of 3.
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, key="test_id", n_actions=3, _time_now_s=0)
)
self.assertTrue(allowed)
self.assertEqual(10.0, time_allowed)
# Test that, after doing these 3 actions, we can't do any more actions without
# waiting.
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, key="test_id", n_actions=1, _time_now_s=0)
)
self.assertFalse(allowed)
self.assertEqual(10.0, time_allowed)
# Test that after waiting we would be able to do only 1 action.
# Note that we don't actually do it (update=False) here.
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(
None,
key="test_id",
update=False,
n_actions=1,
_time_now_s=10,
)
)
self.assertTrue(allowed)
# We would be able to do the 5th action at t=20.
self.assertEqual(20.0, time_allowed)
# Attempt (but fail) to perform TWO actions at t=10.
# Those would be the 4th and 5th actions.
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, key="test_id", n_actions=2, _time_now_s=10)
)
self.assertFalse(allowed)
# The returned time allowed for the next action is now even though we weren't
# allowed to perform the action because whilst we don't allow 2 actions,
# we could still do 1.
self.assertEqual(10.0, time_allowed)
# Test that after waiting until t=20, we can do perform 2 actions.
# These are the 4th and 5th actions.
allowed, time_allowed = self.get_success_or_raise(
limiter.can_do_action(None, key="test_id", n_actions=2, _time_now_s=20)
)
self.assertTrue(allowed)
# We would be able to do the 6th action at t=30.
self.assertEqual(30.0, time_allowed)
def test_rate_limit_burst_only_given_once(self) -> None:
"""
Regression test against a bug that meant that you could build up
extra tokens by timing requests.
"""
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=3
)
def consume_at(time: float) -> bool:
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=time)
)
return success
# Use all our 3 burst tokens
self.assertTrue(consume_at(0.0))
self.assertTrue(consume_at(0.1))
self.assertTrue(consume_at(0.2))
# Wait to recover 1 token (10 seconds at 0.1 Hz).
self.assertTrue(consume_at(10.1))
# Check that we get rate limited after using that token.
self.assertFalse(consume_at(11.1))
def test_record_action_which_doesnt_fill_bucket(self) -> None:
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=3
)
# Observe two actions, leaving room in the bucket for one more.
limiter.record_action(requester=None, key="a", n_actions=2, _time_now_s=0.0)
# We should be able to take a new action now.
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=0.0)
)
self.assertTrue(success)
# ... but not two.
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=0.0)
)
self.assertFalse(success)
def test_record_action_which_fills_bucket(self) -> None:
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=3
)
# Observe three actions, filling up the bucket.
limiter.record_action(requester=None, key="a", n_actions=3, _time_now_s=0.0)
# We should be unable to take a new action now.
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=0.0)
)
self.assertFalse(success)
# If we wait 10 seconds to leak a token, we should be able to take one action...
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=10.0)
)
self.assertTrue(success)
# ... but not two.
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=10.0)
)
self.assertFalse(success)
def test_record_action_which_overfills_bucket(self) -> None:
limiter = Ratelimiter(
store=self.hs.get_datastores().main, clock=None, rate_hz=0.1, burst_count=3
)
# Observe four actions, exceeding the bucket.
limiter.record_action(requester=None, key="a", n_actions=4, _time_now_s=0.0)
# We should be prevented from taking a new action now.
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=0.0)
)
self.assertFalse(success)
# If we wait 10 seconds to leak a token, we should be unable to take an action
# because the bucket is still full.
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=10.0)
)
self.assertFalse(success)
# But after another 10 seconds we leak a second token, giving us room for
# action.
success, _ = self.get_success_or_raise(
limiter.can_do_action(requester=None, key="a", _time_now_s=20.0)
)
self.assertTrue(success)