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23740eaa3d
During the migration the automated script to update the copyright headers accidentally got rid of some of the existing copyright lines. Reinstate them.
147 lines
5.1 KiB
Python
147 lines
5.1 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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from typing import Optional
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from twisted.internet import defer
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from twisted.internet.defer import Deferred
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from synapse.config.homeserver import HomeServerConfig
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from synapse.config.ratelimiting import FederationRatelimitSettings
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from synapse.util.ratelimitutils import FederationRateLimiter
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from tests.server import ThreadedMemoryReactorClock, get_clock
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from tests.unittest import TestCase
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from tests.utils import default_config
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class FederationRateLimiterTestCase(TestCase):
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def test_ratelimit(self) -> None:
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"""A simple test with the default values"""
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reactor, clock = get_clock()
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rc_config = build_rc_config()
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ratelimiter = FederationRateLimiter(clock, rc_config)
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with ratelimiter.ratelimit("testhost") as d1:
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# shouldn't block
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self.successResultOf(d1)
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def test_concurrent_limit(self) -> None:
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"""Test what happens when we hit the concurrent limit"""
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reactor, clock = get_clock()
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rc_config = build_rc_config({"rc_federation": {"concurrent": 2}})
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ratelimiter = FederationRateLimiter(clock, rc_config)
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with ratelimiter.ratelimit("testhost") as d1:
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# shouldn't block
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self.successResultOf(d1)
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cm2 = ratelimiter.ratelimit("testhost")
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d2 = cm2.__enter__()
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# also shouldn't block
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self.successResultOf(d2)
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cm3 = ratelimiter.ratelimit("testhost")
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d3 = cm3.__enter__()
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# this one should block, though ...
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self.assertNoResult(d3)
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# ... until we complete an earlier request
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cm2.__exit__(None, None, None)
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reactor.advance(0.0)
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self.successResultOf(d3)
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def test_sleep_limit(self) -> None:
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"""Test what happens when we hit the sleep limit"""
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reactor, clock = get_clock()
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rc_config = build_rc_config(
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{"rc_federation": {"sleep_limit": 2, "sleep_delay": 500}}
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)
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ratelimiter = FederationRateLimiter(clock, rc_config)
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with ratelimiter.ratelimit("testhost") as d1:
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# shouldn't block
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self.successResultOf(d1)
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with ratelimiter.ratelimit("testhost") as d2:
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# nor this
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self.successResultOf(d2)
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with ratelimiter.ratelimit("testhost") as d3:
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# this one should block, though ...
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self.assertNoResult(d3)
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sleep_time = _await_resolution(reactor, d3)
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self.assertAlmostEqual(sleep_time, 500, places=3)
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def test_lots_of_queued_things(self) -> None:
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"""Tests lots of synchronous things queued up behind a slow thing.
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The stack should *not* explode when the slow thing completes.
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"""
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reactor, clock = get_clock()
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rc_config = build_rc_config(
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{
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"rc_federation": {
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"sleep_limit": 1000000000, # never sleep
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"reject_limit": 1000000000, # never reject requests
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"concurrent": 1,
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}
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}
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)
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ratelimiter = FederationRateLimiter(clock, rc_config)
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with ratelimiter.ratelimit("testhost") as d:
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# shouldn't block
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self.successResultOf(d)
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async def task() -> None:
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with ratelimiter.ratelimit("testhost") as d:
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await d
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for _ in range(1, 100):
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defer.ensureDeferred(task())
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last_task = defer.ensureDeferred(task())
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# Upon exiting the context manager, all the synchronous things will resume.
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# If a stack overflow occurs, the final task will not complete.
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# Wait for all the things to complete.
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reactor.advance(0.0)
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self.successResultOf(last_task)
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def _await_resolution(reactor: ThreadedMemoryReactorClock, d: Deferred) -> float:
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"""advance the clock until the deferred completes.
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Returns the number of milliseconds it took to complete.
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"""
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start_time = reactor.seconds()
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while not d.called:
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reactor.advance(0.01)
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return (reactor.seconds() - start_time) * 1000
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def build_rc_config(settings: Optional[dict] = None) -> FederationRatelimitSettings:
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config_dict = default_config("test")
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config_dict.update(settings or {})
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config = HomeServerConfig()
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config.parse_config_dict(config_dict, "", "")
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return config.ratelimiting.rc_federation
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