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
|
# -*- coding: utf-8 -*-
# Copyright 2018 New Vector 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.errors import (
SynapseError, MatrixCodeMessageException, CodeMessageException,
)
from synapse.events import FrozenEvent
from synapse.events.snapshot import EventContext
from synapse.http.servlet import RestServlet, parse_json_object_from_request
from synapse.util.async import sleep
from synapse.util.caches.response_cache import ResponseCache
from synapse.util.logcontext import make_deferred_yieldable, preserve_fn
from synapse.util.metrics import Measure
from synapse.types import Requester
import logging
import re
logger = logging.getLogger(__name__)
@defer.inlineCallbacks
def send_event_to_master(client, host, port, requester, event, context,
ratelimit, extra_users):
"""Send event to be handled on the master
Args:
client (SimpleHttpClient)
host (str): host of master
port (int): port on master listening for HTTP replication
requester (Requester)
event (FrozenEvent)
context (EventContext)
ratelimit (bool)
extra_users (list(str)): Any extra users to notify about event
"""
uri = "http://%s:%s/_synapse/replication/send_event/%s" % (
host, port, event.event_id,
)
payload = {
"event": event.get_pdu_json(),
"internal_metadata": event.internal_metadata.get_dict(),
"rejected_reason": event.rejected_reason,
"context": context.serialize(event),
"requester": requester.serialize(),
"ratelimit": ratelimit,
"extra_users": extra_users,
}
try:
# We keep retrying the same request for timeouts. This is so that we
# have a good idea that the request has either succeeded or failed on
# the master, and so whether we should clean up or not.
while True:
try:
result = yield client.put_json(uri, payload)
break
except CodeMessageException as e:
if e.code != 504:
logger.warn("send_event request timed out")
raise
# If we timed out we probably don't need to worry about backing
# off too much, but lets just wait a little anyway.
yield sleep(1)
except MatrixCodeMessageException as e:
# We convert to SynapseError as we know that it was a SynapseError
# on the master process that we should send to the client. (And
# importantly, not stack traces everywhere)
raise SynapseError(e.code, e.msg, e.errcode)
defer.returnValue(result)
class ReplicationSendEventRestServlet(RestServlet):
"""Handles events newly created on workers, including persisting and
notifying.
The API looks like:
POST /_synapse/replication/send_event/:event_id
{
"event": { .. serialized event .. },
"internal_metadata": { .. serialized internal_metadata .. },
"rejected_reason": .., // The event.rejected_reason field
"context": { .. serialized event context .. },
"requester": { .. serialized requester .. },
"ratelimit": true,
"extra_users": [],
}
"""
PATTERNS = [re.compile("^/_synapse/replication/send_event/(?P<event_id>[^/]+)$")]
def __init__(self, hs):
super(ReplicationSendEventRestServlet, self).__init__()
self.event_creation_handler = hs.get_event_creation_handler()
self.store = hs.get_datastore()
self.clock = hs.get_clock()
# The responses are tiny, so we may as well cache them for a while
self.response_cache = ResponseCache(hs, timeout_ms=30 * 60 * 1000)
def on_PUT(self, request, event_id):
result = self.response_cache.get(event_id)
if not result:
logger.warn("Returning cached response")
result = self.response_cache.set(
event_id,
preserve_fn(self._handle_request)(request)
)
return make_deferred_yieldable(result)
@defer.inlineCallbacks
def _handle_request(self, request):
with Measure(self.clock, "repl_send_event_parse"):
content = parse_json_object_from_request(request)
event_dict = content["event"]
internal_metadata = content["internal_metadata"]
rejected_reason = content["rejected_reason"]
event = FrozenEvent(event_dict, internal_metadata, rejected_reason)
requester = Requester.deserialize(self.store, content["requester"])
context = yield EventContext.deserialize(self.store, content["context"])
ratelimit = content["ratelimit"]
extra_users = content["extra_users"]
if requester.user:
request.authenticated_entity = requester.user.to_string()
logger.info(
"Got event to send with ID: %s into room: %s",
event.event_id, event.room_id,
)
yield self.event_creation_handler.persist_and_notify_client_event(
requester, event, context,
ratelimit=ratelimit,
extra_users=extra_users,
)
defer.returnValue((200, {}))
def register_servlets(hs, http_server):
ReplicationSendEventRestServlet(hs).register(http_server)
|
