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
215
216
217
218
219
220
221
222
223
224
225
226
|
# -*- coding: utf-8 -*-
# Copyright 2015 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 synapse.api.errors import StoreError
from synapse.appservice import ApplicationService
from ._base import SQLBaseStore
logger = logging.getLogger(__name__)
class ApplicationServiceCache(object):
"""Caches ApplicationServices and provides utility functions on top.
This class is designed to be invoked on incoming events in order to avoid
hammering the database every time to extract a list of application service
regexes.
"""
def __init__(self):
self.services = []
class ApplicationServiceStore(SQLBaseStore):
def __init__(self, hs):
super(ApplicationServiceStore, self).__init__(hs)
self.cache = ApplicationServiceCache()
self._populate_cache()
@defer.inlineCallbacks
def unregister_app_service(self, token):
"""Unregisters this service.
This removes all AS specific regex and the base URL. The token is the
only thing preserved for future registration attempts.
"""
yield self.runInteraction(
"unregister_app_service",
self._unregister_app_service_txn,
token,
)
# update cache TODO: Should this be in the txn?
for service in self.cache.services:
if service.token == token:
service.url = None
service.namespaces = None
def _unregister_app_service_txn(self, txn, token):
# kill the url to prevent pushes
txn.execute(
"UPDATE application_services SET url=NULL WHERE token=?",
(token,)
)
# cleanup regex
as_id = self._get_as_id_txn(txn, token)
if not as_id:
logger.warning(
"unregister_app_service_txn: Failed to find as_id for token=",
token
)
return False
txn.execute(
"DELETE FROM application_services_regex WHERE as_id=?",
(as_id,)
)
return True
@defer.inlineCallbacks
def update_app_service(self, service):
"""Update an application service, clobbering what was previously there.
Args:
service(ApplicationService): The updated service.
"""
# NB: There is no "insert" since we provide no public-facing API to
# allocate new ASes. It relies on the server admin inserting the AS
# token into the database manually.
if not service.token or not service.url:
raise StoreError(400, "Token and url must be specified.")
yield self.runInteraction(
"update_app_service",
self._update_app_service_txn,
service
)
# update cache TODO: Should this be in the txn?
for (index, cache_service) in enumerate(self.cache.services):
if service.token == cache_service.token:
self.cache.services[index] = service
logger.info("Updated: %s", service)
return
# new entry
self.cache.services.append(service)
logger.info("Updated(new): %s", service)
def _update_app_service_txn(self, txn, service):
as_id = self._get_as_id_txn(txn, service.token)
if not as_id:
logger.warning(
"update_app_service_txn: Failed to find as_id for token=",
service.token
)
return False
txn.execute(
"UPDATE application_services SET url=? WHERE id=?",
(service.url, as_id,)
)
# cleanup regex
txn.execute(
"DELETE FROM application_services_regex WHERE as_id=?",
(as_id,)
)
for (ns_int, ns_str) in enumerate(ApplicationService.NS_LIST):
if ns_str in service.namespaces:
for regex in service.namespaces[ns_str]:
txn.execute(
"INSERT INTO application_services_regex("
"as_id, namespace, regex) values(?,?,?)",
(as_id, ns_int, regex)
)
return True
def _get_as_id_txn(self, txn, token):
cursor = txn.execute(
"SELECT id FROM application_services WHERE token=?",
(token,)
)
res = cursor.fetchone()
if res:
return res[0]
def get_app_services(self):
return self.cache.services
def get_app_service_by_token(self, token, from_cache=True):
"""Get the application service with the given token.
Args:
token (str): The application service token.
from_cache (bool): True to get this service from the cache, False to
check the database.
Raises:
StoreError if there was a problem retrieving this service.
"""
if from_cache:
for service in self.cache.services:
if service.token == token:
return service
return None
# TODO: The from_cache=False impl
# TODO: This should be JOINed with the application_services_regex table.
@defer.inlineCallbacks
def _populate_cache(self):
"""Populates the ApplicationServiceCache from the database."""
sql = ("SELECT * FROM application_services LEFT JOIN "
"application_services_regex ON application_services.id = "
"application_services_regex.as_id")
# SQL results in the form:
# [
# {
# 'regex': "something",
# 'url': "something",
# 'namespace': enum,
# 'as_id': 0,
# 'token': "something",
# 'id': 0
# }
# ]
services = {}
results = yield self._execute_and_decode(sql)
for res in results:
as_token = res["token"]
if as_token not in services:
# add the service
services[as_token] = {
"url": res["url"],
"token": as_token,
"namespaces": {
ApplicationService.NS_USERS: [],
ApplicationService.NS_ALIASES: [],
ApplicationService.NS_ROOMS: []
}
}
# add the namespace regex if one exists
ns_int = res["namespace"]
if ns_int is None:
continue
try:
services[as_token]["namespaces"][
ApplicationService.NS_LIST[ns_int]].append(
res["regex"]
)
except IndexError:
logger.error("Bad namespace enum '%s'. %s", ns_int, res)
for service in services.values():
logger.info("Found application service: %s", service)
self.cache.services.append(ApplicationService(
service["token"],
service["url"],
service["namespaces"]
))
|
