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