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https://mau.dev/maunium/synapse.git
synced 2024-09-06 01:22:16 +00:00
![David Baker](/assets/img/avatar_default.png)
Means that now you can't do exact matches even in override rules, but I think we can live with that. Advantage is that you'll now always get back what was put in to the API.
410 lines
15 KiB
Python
410 lines
15 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015 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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from twisted.internet import defer
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from synapse.streams.config import PaginationConfig
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from synapse.types import StreamToken, UserID
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import synapse.util.async
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import baserules
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import logging
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import fnmatch
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import json
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import re
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logger = logging.getLogger(__name__)
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class Pusher(object):
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INITIAL_BACKOFF = 1000
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MAX_BACKOFF = 60 * 60 * 1000
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GIVE_UP_AFTER = 24 * 60 * 60 * 1000
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DEFAULT_ACTIONS = ['notify']
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INEQUALITY_EXPR = re.compile("^([=<>]*)([0-9]*)$")
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def __init__(self, _hs, instance_handle, user_name, app_id,
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app_display_name, device_display_name, pushkey, pushkey_ts,
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data, last_token, last_success, failing_since):
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self.hs = _hs
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self.evStreamHandler = self.hs.get_handlers().event_stream_handler
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self.store = self.hs.get_datastore()
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self.clock = self.hs.get_clock()
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self.instance_handle = instance_handle
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self.user_name = user_name
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self.app_id = app_id
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self.app_display_name = app_display_name
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self.device_display_name = device_display_name
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self.pushkey = pushkey
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self.pushkey_ts = pushkey_ts
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self.data = data
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self.last_token = last_token
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self.last_success = last_success # not actually used
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self.backoff_delay = Pusher.INITIAL_BACKOFF
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self.failing_since = failing_since
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self.alive = True
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# The last value of last_active_time that we saw
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self.last_last_active_time = 0
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self.has_unread = True
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@defer.inlineCallbacks
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def _actions_for_event(self, ev):
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"""
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This should take into account notification settings that the user
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has configured both globally and per-room when we have the ability
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to do such things.
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"""
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if ev['user_id'] == self.user_name:
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# let's assume you probably know about messages you sent yourself
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defer.returnValue(['dont_notify'])
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if ev['type'] == 'm.room.member':
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if ev['state_key'] != self.user_name:
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defer.returnValue(['dont_notify'])
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rules = yield self.store.get_push_rules_for_user_name(self.user_name)
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for r in rules:
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r['conditions'] = json.loads(r['conditions'])
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r['actions'] = json.loads(r['actions'])
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user_name_localpart = UserID.from_string(self.user_name).localpart
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rules.extend(baserules.make_base_rules(user_name_localpart))
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# get *our* member event for display name matching
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member_events_for_room = yield self.store.get_current_state(
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room_id=ev['room_id'],
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event_type='m.room.member',
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state_key=None
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)
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my_display_name = None
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room_member_count = 0
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for mev in member_events_for_room:
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if mev.content['membership'] != 'join':
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continue
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# This loop does two things:
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# 1) Find our current display name
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if mev.state_key == self.user_name:
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my_display_name = mev.content['displayname']
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# and 2) Get the number of people in that room
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room_member_count += 1
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for r in rules:
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matches = True
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conditions = r['conditions']
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actions = r['actions']
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for c in conditions:
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matches &= self._event_fulfills_condition(
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ev, c, display_name=my_display_name,
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room_member_count=room_member_count
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)
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# ignore rules with no actions (we have an explict 'dont_notify'
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if len(actions) == 0:
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logger.warn(
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"Ignoring rule id %s with no actions for user %s" %
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(r['rule_id'], r['user_name'])
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)
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continue
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if matches:
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defer.returnValue(actions)
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defer.returnValue(Pusher.DEFAULT_ACTIONS)
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def _event_fulfills_condition(self, ev, condition, display_name, room_member_count):
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if condition['kind'] == 'event_match':
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if 'pattern' not in condition:
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logger.warn("event_match condition with no pattern")
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return False
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pat = condition['pattern']
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if pat.strip("*?[]") == pat:
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# no special glob characters so we assume the user means
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# 'contains this string' rather than 'is this string'
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pat = "*%s*" % (pat,)
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val = _value_for_dotted_key(condition['key'], ev)
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if val is None:
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return False
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return fnmatch.fnmatch(val.upper(), pat.upper())
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elif condition['kind'] == 'device':
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if 'instance_handle' not in condition:
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return True
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return condition['instance_handle'] == self.instance_handle
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elif condition['kind'] == 'contains_display_name':
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# This is special because display names can be different
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# between rooms and so you can't really hard code it in a rule.
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# Optimisation: we should cache these names and update them from
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# the event stream.
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if 'content' not in ev or 'body' not in ev['content']:
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return False
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if not display_name:
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return False
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return fnmatch.fnmatch(
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ev['content']['body'].upper(), "*%s*" % (display_name.upper(),)
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)
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elif condition['kind'] == 'room_member_count':
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if 'is' not in condition:
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return False
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m = Pusher.INEQUALITY_EXPR.match(condition['is'])
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if not m:
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return False
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ineq = m.group(1)
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rhs = m.group(2)
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if not rhs.isdigit():
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return False
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rhs = int(rhs)
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if ineq == '' or ineq == '==':
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return room_member_count == rhs
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elif ineq == '<':
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return room_member_count < rhs
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elif ineq == '>':
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return room_member_count > rhs
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elif ineq == '>=':
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return room_member_count >= rhs
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elif ineq == '<=':
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return room_member_count <= rhs
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else:
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return False
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else:
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return True
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@defer.inlineCallbacks
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def get_context_for_event(self, ev):
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name_aliases = yield self.store.get_room_name_and_aliases(
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ev['room_id']
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)
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ctx = {'aliases': name_aliases[1]}
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if name_aliases[0] is not None:
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ctx['name'] = name_aliases[0]
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their_member_events_for_room = yield self.store.get_current_state(
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room_id=ev['room_id'],
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event_type='m.room.member',
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state_key=ev['user_id']
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)
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if len(their_member_events_for_room) > 0:
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dn = their_member_events_for_room[0].content['displayname']
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if dn is not None:
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ctx['sender_display_name'] = dn
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defer.returnValue(ctx)
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@defer.inlineCallbacks
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def start(self):
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if not self.last_token:
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# First-time setup: get a token to start from (we can't
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# just start from no token, ie. 'now'
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# because we need the result to be reproduceable in case
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# we fail to dispatch the push)
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config = PaginationConfig(from_token=None, limit='1')
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chunk = yield self.evStreamHandler.get_stream(
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self.user_name, config, timeout=0)
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self.last_token = chunk['end']
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self.store.update_pusher_last_token(
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self.user_name, self.pushkey, self.last_token)
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logger.info("Pusher %s for user %s starting from token %s",
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self.pushkey, self.user_name, self.last_token)
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while self.alive:
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from_tok = StreamToken.from_string(self.last_token)
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config = PaginationConfig(from_token=from_tok, limit='1')
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chunk = yield self.evStreamHandler.get_stream(
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self.user_name, config,
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timeout=100*365*24*60*60*1000, affect_presence=False
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)
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# limiting to 1 may get 1 event plus 1 presence event, so
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# pick out the actual event
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single_event = None
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for c in chunk['chunk']:
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if 'event_id' in c: # Hmmm...
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single_event = c
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break
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if not single_event:
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self.last_token = chunk['end']
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continue
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if not self.alive:
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continue
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processed = False
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actions = yield self._actions_for_event(single_event)
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tweaks = _tweaks_for_actions(actions)
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if len(actions) == 0:
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logger.warn("Empty actions! Using default action.")
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actions = Pusher.DEFAULT_ACTIONS
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if 'notify' not in actions and 'dont_notify' not in actions:
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logger.warn("Neither notify nor dont_notify in actions: adding default")
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actions.extend(Pusher.DEFAULT_ACTIONS)
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if 'dont_notify' in actions:
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logger.debug(
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"%s for %s: dont_notify",
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single_event['event_id'], self.user_name
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)
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processed = True
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else:
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rejected = yield self.dispatch_push(single_event, tweaks)
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self.has_unread = True
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if isinstance(rejected, list) or isinstance(rejected, tuple):
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processed = True
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for pk in rejected:
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if pk != self.pushkey:
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# for sanity, we only remove the pushkey if it
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# was the one we actually sent...
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logger.warn(
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("Ignoring rejected pushkey %s because we"
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" didn't send it"), pk
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)
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else:
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logger.info(
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"Pushkey %s was rejected: removing",
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pk
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)
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yield self.hs.get_pusherpool().remove_pusher(
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self.app_id, pk
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)
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if not self.alive:
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continue
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if processed:
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self.backoff_delay = Pusher.INITIAL_BACKOFF
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self.last_token = chunk['end']
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self.store.update_pusher_last_token_and_success(
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self.user_name,
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self.pushkey,
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self.last_token,
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self.clock.time_msec()
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)
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if self.failing_since:
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self.failing_since = None
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self.store.update_pusher_failing_since(
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self.user_name,
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self.pushkey,
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self.failing_since)
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else:
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if not self.failing_since:
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self.failing_since = self.clock.time_msec()
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self.store.update_pusher_failing_since(
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self.user_name,
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self.pushkey,
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self.failing_since
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)
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if (self.failing_since and
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self.failing_since <
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self.clock.time_msec() - Pusher.GIVE_UP_AFTER):
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# we really only give up so that if the URL gets
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# fixed, we don't suddenly deliver a load
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# of old notifications.
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logger.warn("Giving up on a notification to user %s, "
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"pushkey %s",
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self.user_name, self.pushkey)
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self.backoff_delay = Pusher.INITIAL_BACKOFF
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self.last_token = chunk['end']
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self.store.update_pusher_last_token(
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self.user_name,
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self.pushkey,
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self.last_token
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)
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self.failing_since = None
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self.store.update_pusher_failing_since(
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self.user_name,
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self.pushkey,
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self.failing_since
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)
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else:
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logger.warn("Failed to dispatch push for user %s "
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"(failing for %dms)."
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"Trying again in %dms",
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self.user_name,
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self.clock.time_msec() - self.failing_since,
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self.backoff_delay)
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yield synapse.util.async.sleep(self.backoff_delay / 1000.0)
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self.backoff_delay *= 2
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if self.backoff_delay > Pusher.MAX_BACKOFF:
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self.backoff_delay = Pusher.MAX_BACKOFF
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def stop(self):
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self.alive = False
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def dispatch_push(self, p, tweaks):
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"""
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Overridden by implementing classes to actually deliver the notification
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Args:
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p: The event to notify for as a single event from the event stream
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Returns: If the notification was delivered, an array containing any
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pushkeys that were rejected by the push gateway.
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False if the notification could not be delivered (ie.
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should be retried).
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"""
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pass
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def reset_badge_count(self):
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pass
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def presence_changed(self, state):
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"""
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We clear badge counts whenever a user's last_active time is bumped
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This is by no means perfect but I think it's the best we can do
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without read receipts.
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"""
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if 'last_active' in state.state:
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last_active = state.state['last_active']
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if last_active > self.last_last_active_time:
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self.last_last_active_time = last_active
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if self.has_unread:
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logger.info("Resetting badge count for %s", self.user_name)
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self.reset_badge_count()
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self.has_unread = False
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def _value_for_dotted_key(dotted_key, event):
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parts = dotted_key.split(".")
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val = event
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while len(parts) > 0:
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if parts[0] not in val:
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return None
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val = val[parts[0]]
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parts = parts[1:]
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return val
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def _tweaks_for_actions(actions):
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tweaks = {}
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for a in actions:
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if not isinstance(a, dict):
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continue
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if 'set_sound' in a:
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tweaks['sound'] = a['set_sound']
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return tweaks
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class PusherConfigException(Exception):
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def __init__(self, msg):
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super(PusherConfigException, self).__init__(msg)
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