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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
# -*- coding: utf-8 -*-
# Copyright 2015, 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 twisted.internet import defer
from synapse.api.constants import EventTypes
from synapse.util.metrics import Measure
from synapse.util.logcontext import preserve_fn
import logging
logger = logging.getLogger(__name__)
def log_failure(failure):
logger.error(
"Application Services Failure",
exc_info=(
failure.type,
failure.value,
failure.getTracebackObject()
)
)
class ApplicationServicesHandler(object):
def __init__(self, hs):
self.store = hs.get_datastore()
self.is_mine_id = hs.is_mine_id
self.appservice_api = hs.get_application_service_api()
self.scheduler = hs.get_application_service_scheduler()
self.started_scheduler = False
self.clock = hs.get_clock()
self.notify_appservices = hs.config.notify_appservices
self.current_max = 0
self.is_processing = False
@defer.inlineCallbacks
def notify_interested_services(self, current_id):
"""Notifies (pushes) all application services interested in this event.
Pushing is done asynchronously, so this method won't block for any
prolonged length of time.
Args:
current_id(int): The current maximum ID.
"""
services = yield self.store.get_app_services()
if not services or not self.notify_appservices:
return
self.current_max = max(self.current_max, current_id)
if self.is_processing:
return
with Measure(self.clock, "notify_interested_services"):
self.is_processing = True
try:
upper_bound = self.current_max
limit = 100
while True:
upper_bound, events = yield self.store.get_new_events_for_appservice(
upper_bound, limit
)
if not events:
break
for event in events:
# Gather interested services
services = yield self._get_services_for_event(event)
if len(services) == 0:
continue # no services need notifying
# Do we know this user exists? If not, poke the user
# query API for all services which match that user regex.
# This needs to block as these user queries need to be
# made BEFORE pushing the event.
yield self._check_user_exists(event.sender)
if event.type == EventTypes.Member:
yield self._check_user_exists(event.state_key)
if not self.started_scheduler:
self.scheduler.start().addErrback(log_failure)
self.started_scheduler = True
# Fork off pushes to these services
for service in services:
preserve_fn(self.scheduler.submit_event_for_as)(
service, event
)
yield self.store.set_appservice_last_pos(upper_bound)
if len(events) < limit:
break
finally:
self.is_processing = False
@defer.inlineCallbacks
def query_user_exists(self, user_id):
"""Check if any application service knows this user_id exists.
Args:
user_id(str): The user to query if they exist on any AS.
Returns:
True if this user exists on at least one application service.
"""
user_query_services = yield self._get_services_for_user(
user_id=user_id
)
for user_service in user_query_services:
is_known_user = yield self.appservice_api.query_user(
user_service, user_id
)
if is_known_user:
defer.returnValue(True)
defer.returnValue(False)
@defer.inlineCallbacks
def query_room_alias_exists(self, room_alias):
"""Check if an application service knows this room alias exists.
Args:
room_alias(RoomAlias): The room alias to query.
Returns:
namedtuple: with keys "room_id" and "servers" or None if no
association can be found.
"""
room_alias_str = room_alias.to_string()
services = yield self.store.get_app_services()
alias_query_services = [
s for s in services if (
s.is_interested_in_alias(room_alias_str)
)
]
for alias_service in alias_query_services:
is_known_alias = yield self.appservice_api.query_alias(
alias_service, room_alias_str
)
if is_known_alias:
# the alias exists now so don't query more ASes.
result = yield self.store.get_association_from_room_alias(
room_alias
)
defer.returnValue(result)
@defer.inlineCallbacks
def _get_services_for_event(self, event):
"""Retrieve a list of application services interested in this event.
Args:
event(Event): The event to check. Can be None if alias_list is not.
Returns:
list<ApplicationService>: A list of services interested in this
event based on the service regex.
"""
services = yield self.store.get_app_services()
interested_list = [
s for s in services if (
yield s.is_interested(event, self.store)
)
]
defer.returnValue(interested_list)
@defer.inlineCallbacks
def _get_services_for_user(self, user_id):
services = yield self.store.get_app_services()
interested_list = [
s for s in services if (
s.is_interested_in_user(user_id)
)
]
defer.returnValue(interested_list)
@defer.inlineCallbacks
def _is_unknown_user(self, user_id):
if not self.is_mine_id(user_id):
# we don't know if they are unknown or not since it isn't one of our
# users. We can't poke ASes.
defer.returnValue(False)
return
user_info = yield self.store.get_user_by_id(user_id)
if user_info:
defer.returnValue(False)
return
# user not found; could be the AS though, so check.
services = yield self.store.get_app_services()
service_list = [s for s in services if s.sender == user_id]
defer.returnValue(len(service_list) == 0)
@defer.inlineCallbacks
def _check_user_exists(self, user_id):
unknown_user = yield self._is_unknown_user(user_id)
if unknown_user:
exists = yield self.query_user_exists(user_id)
defer.returnValue(exists)
defer.returnValue(True)
|
