69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 OpenMarket Ltd
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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 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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from ._base import SQLBaseStore, Cache
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from twisted.internet import defer
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# Number of msec of granularity to store the user IP 'last seen' time. Smaller
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# times give more inserts into the database even for readonly API hits
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# 120 seconds == 2 minutes
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LAST_SEEN_GRANULARITY = 120 * 1000
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class ClientIpStore(SQLBaseStore):
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def __init__(self, hs):
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self.client_ip_last_seen = Cache(
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name="client_ip_last_seen",
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keylen=4,
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)
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super(ClientIpStore, self).__init__(hs)
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@defer.inlineCallbacks
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def insert_client_ip(self, user, access_token, ip, user_agent):
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now = int(self._clock.time_msec())
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key = (user.to_string(), access_token, ip)
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try:
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last_seen = self.client_ip_last_seen.get(key)
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except KeyError:
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last_seen = None
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# Rate-limited inserts
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if last_seen is not None and (now - last_seen) < LAST_SEEN_GRANULARITY:
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defer.returnValue(None)
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self.client_ip_last_seen.prefill(key, now)
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# It's safe not to lock here: a) no unique constraint,
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# b) LAST_SEEN_GRANULARITY makes concurrent updates incredibly unlikely
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yield self._simple_upsert(
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"user_ips",
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keyvalues={
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"user_id": user.to_string(),
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"access_token": access_token,
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"ip": ip,
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"user_agent": user_agent,
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},
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values={
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"last_seen": now,
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},
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desc="insert_client_ip",
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lock=False,
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)
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