1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
# -*- 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.
import logging
from twisted.internet import defer
from ._base import Cache
from . import background_updates
logger = logging.getLogger(__name__)
# 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(background_updates.BackgroundUpdateStore):
def __init__(self, hs):
self.client_ip_last_seen = Cache(
name="client_ip_last_seen",
keylen=4,
)
super(ClientIpStore, self).__init__(hs)
self.register_background_index_update(
"user_ips_device_index",
index_name="user_ips_device_id",
table="user_ips",
columns=["user_id", "device_id", "last_seen"],
)
@defer.inlineCallbacks
def insert_client_ip(self, user, access_token, ip, user_agent, device_id):
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,
"device_id": device_id,
},
values={
"last_seen": now,
},
desc="insert_client_ip",
lock=False,
)
@defer.inlineCallbacks
def get_last_client_ip_by_device(self, devices):
"""For each device_id listed, give the user_ip it was last seen on
Args:
devices (iterable[(str, str)]): list of (user_id, device_id) pairs
Returns:
defer.Deferred: resolves to a dict, where the keys
are (user_id, device_id) tuples. The values are also dicts, with
keys giving the column names
"""
res = yield self.runInteraction(
"get_last_client_ip_by_device",
self._get_last_client_ip_by_device_txn,
retcols=(
"user_id",
"access_token",
"ip",
"user_agent",
"device_id",
"last_seen",
),
devices=devices
)
ret = {(d["user_id"], d["device_id"]): d for d in res}
defer.returnValue(ret)
@classmethod
def _get_last_client_ip_by_device_txn(cls, txn, devices, retcols):
if not devices:
return []
where_clauses = []
bindings = []
for (user_id, device_id) in devices:
if device_id is None:
where_clauses.append("(user_id = ? AND device_id IS NULL)")
bindings.extend((user_id, ))
else:
where_clauses.append("(user_id = ? AND device_id = ?)")
bindings.extend((user_id, device_id))
inner_select = (
"SELECT MAX(last_seen) mls, user_id, device_id FROM user_ips "
"WHERE %(where)s "
"GROUP BY user_id, device_id"
) % {
"where": " OR ".join(where_clauses),
}
sql = (
"SELECT %(retcols)s FROM user_ips "
"JOIN (%(inner_select)s) ips ON"
" user_ips.last_seen = ips.mls AND"
" user_ips.user_id = ips.user_id AND"
" (user_ips.device_id = ips.device_id OR"
" (user_ips.device_id IS NULL AND ips.device_id IS NULL)"
" )"
) % {
"retcols": ",".join("user_ips." + c for c in retcols),
"inner_select": inner_select,
}
txn.execute(sql, bindings)
return cls.cursor_to_dict(txn)
|
