146 lines
4.7 KiB
Python
146 lines
4.7 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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import logging
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from twisted.internet import defer
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from ._base import Cache
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from . import background_updates
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logger = logging.getLogger(__name__)
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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(background_updates.BackgroundUpdateStore):
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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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self.register_background_index_update(
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"user_ips_device_index",
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index_name="user_ips_device_id",
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table="user_ips",
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columns=["user_id", "device_id", "last_seen"],
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)
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@defer.inlineCallbacks
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def insert_client_ip(self, user, access_token, ip, user_agent, device_id):
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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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"device_id": device_id,
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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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@defer.inlineCallbacks
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def get_last_client_ip_by_device(self, devices):
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"""For each device_id listed, give the user_ip it was last seen on
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Args:
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devices (iterable[(str, str)]): list of (user_id, device_id) pairs
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Returns:
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defer.Deferred: resolves to a dict, where the keys
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are (user_id, device_id) tuples. The values are also dicts, with
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keys giving the column names
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"""
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res = yield self.runInteraction(
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"get_last_client_ip_by_device",
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self._get_last_client_ip_by_device_txn,
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retcols=(
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"user_id",
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"access_token",
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"ip",
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"user_agent",
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"device_id",
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"last_seen",
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),
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devices=devices
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)
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ret = {(d["user_id"], d["device_id"]): d for d in res}
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defer.returnValue(ret)
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@classmethod
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def _get_last_client_ip_by_device_txn(cls, txn, devices, retcols):
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where_clauses = []
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bindings = []
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for (user_id, device_id) in devices:
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if device_id is None:
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where_clauses.append("(user_id = ? AND device_id IS NULL)")
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bindings.extend((user_id, ))
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else:
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where_clauses.append("(user_id = ? AND device_id = ?)")
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bindings.extend((user_id, device_id))
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inner_select = (
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"SELECT MAX(last_seen) mls, user_id, device_id FROM user_ips "
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"WHERE %(where)s "
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"GROUP BY user_id, device_id"
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) % {
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"where": " OR ".join(where_clauses),
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}
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sql = (
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"SELECT %(retcols)s FROM user_ips "
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"JOIN (%(inner_select)s) ips ON"
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" user_ips.last_seen = ips.mls AND"
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" user_ips.user_id = ips.user_id AND"
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" (user_ips.device_id = ips.device_id OR"
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" (user_ips.device_id IS NULL AND ips.device_id IS NULL)"
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" )"
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) % {
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"retcols": ",".join("user_ips." + c for c in retcols),
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"inner_select": inner_select,
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}
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txn.execute(sql, bindings)
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return cls.cursor_to_dict(txn)
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