335 lines
13 KiB
Python
335 lines
13 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015, 2016 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 synapse.push import PusherConfigException
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from twisted.internet import defer, reactor
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from twisted.internet.error import AlreadyCalled, AlreadyCancelled
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import logging
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import push_rule_evaluator
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import push_tools
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from synapse.util.logcontext import LoggingContext
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from synapse.util.metrics import Measure
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logger = logging.getLogger(__name__)
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class HttpPusher(object):
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INITIAL_BACKOFF_SEC = 1 # in seconds because that's what Twisted takes
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MAX_BACKOFF_SEC = 60 * 60
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# This one's in ms because we compare it against the clock
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GIVE_UP_AFTER_MS = 24 * 60 * 60 * 1000
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def __init__(self, hs, pusherdict):
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self.hs = hs
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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.state_handler = self.hs.get_state_handler()
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self.user_id = pusherdict['user_name']
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self.app_id = pusherdict['app_id']
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self.app_display_name = pusherdict['app_display_name']
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self.device_display_name = pusherdict['device_display_name']
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self.pushkey = pusherdict['pushkey']
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self.pushkey_ts = pusherdict['ts']
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self.data = pusherdict['data']
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self.last_stream_ordering = pusherdict['last_stream_ordering']
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self.backoff_delay = HttpPusher.INITIAL_BACKOFF_SEC
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self.failing_since = pusherdict['failing_since']
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self.timed_call = None
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self.processing = False
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# This is the highest stream ordering we know it's safe to process.
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# When new events arrive, we'll be given a window of new events: we
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# should honour this rather than just looking for anything higher
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# because of potential out-of-order event serialisation. This starts
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# off as None though as we don't know any better.
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self.max_stream_ordering = None
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if 'data' not in pusherdict:
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raise PusherConfigException(
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"No 'data' key for HTTP pusher"
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)
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self.data = pusherdict['data']
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self.name = "%s/%s/%s" % (
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pusherdict['user_name'],
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pusherdict['app_id'],
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pusherdict['pushkey'],
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)
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if 'url' not in self.data:
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raise PusherConfigException(
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"'url' required in data for HTTP pusher"
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)
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self.url = self.data['url']
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self.http_client = hs.get_simple_http_client()
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self.data_minus_url = {}
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self.data_minus_url.update(self.data)
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del self.data_minus_url['url']
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@defer.inlineCallbacks
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def on_started(self):
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yield self._process()
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@defer.inlineCallbacks
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def on_new_notifications(self, min_stream_ordering, max_stream_ordering):
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self.max_stream_ordering = max(max_stream_ordering, self.max_stream_ordering)
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yield self._process()
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@defer.inlineCallbacks
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def on_new_receipts(self, min_stream_id, max_stream_id):
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# Note that the min here shouldn't be relied upon to be accurate.
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# We could check the receipts are actually m.read receipts here,
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# but currently that's the only type of receipt anyway...
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with LoggingContext("push.on_new_receipts"):
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with Measure(self.clock, "push.on_new_receipts"):
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badge = yield push_tools.get_badge_count(
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self.hs.get_datastore(), self.user_id
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)
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yield self._send_badge(badge)
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@defer.inlineCallbacks
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def on_timer(self):
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yield self._process()
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def on_stop(self):
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if self.timed_call:
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try:
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self.timed_call.cancel()
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except (AlreadyCalled, AlreadyCancelled):
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pass
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self.timed_call = None
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@defer.inlineCallbacks
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def _process(self):
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if self.processing:
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return
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with LoggingContext("push._process"):
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with Measure(self.clock, "push._process"):
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try:
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self.processing = True
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# if the max ordering changes while we're running _unsafe_process,
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# call it again, and so on until we've caught up.
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while True:
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starting_max_ordering = self.max_stream_ordering
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try:
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yield self._unsafe_process()
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except:
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logger.exception("Exception processing notifs")
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if self.max_stream_ordering == starting_max_ordering:
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break
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finally:
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self.processing = False
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@defer.inlineCallbacks
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def _unsafe_process(self):
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"""
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Looks for unset notifications and dispatch them, in order
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Never call this directly: use _process which will only allow this to
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run once per pusher.
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"""
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fn = self.store.get_unread_push_actions_for_user_in_range_for_http
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unprocessed = yield fn(
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self.user_id, self.last_stream_ordering, self.max_stream_ordering
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)
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for push_action in unprocessed:
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processed = yield self._process_one(push_action)
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if processed:
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self.backoff_delay = HttpPusher.INITIAL_BACKOFF_SEC
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self.last_stream_ordering = push_action['stream_ordering']
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yield self.store.update_pusher_last_stream_ordering_and_success(
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self.app_id, self.pushkey, self.user_id,
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self.last_stream_ordering,
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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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yield self.store.update_pusher_failing_since(
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self.app_id, self.pushkey, self.user_id,
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self.failing_since
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)
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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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yield self.store.update_pusher_failing_since(
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self.app_id, self.pushkey, self.user_id,
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self.failing_since
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)
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if (
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self.failing_since and
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self.failing_since <
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self.clock.time_msec() - HttpPusher.GIVE_UP_AFTER_MS
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):
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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_id, self.pushkey)
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self.backoff_delay = HttpPusher.INITIAL_BACKOFF_SEC
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self.last_stream_ordering = push_action['stream_ordering']
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yield self.store.update_pusher_last_stream_ordering(
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self.app_id,
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self.pushkey,
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self.user_id,
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self.last_stream_ordering
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)
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self.failing_since = None
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yield self.store.update_pusher_failing_since(
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self.app_id,
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self.pushkey,
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self.user_id,
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self.failing_since
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)
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else:
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logger.info("Push failed: delaying for %ds", self.backoff_delay)
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self.timed_call = reactor.callLater(self.backoff_delay, self.on_timer)
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self.backoff_delay = min(self.backoff_delay * 2, self.MAX_BACKOFF_SEC)
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break
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@defer.inlineCallbacks
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def _process_one(self, push_action):
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if 'notify' not in push_action['actions']:
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defer.returnValue(True)
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tweaks = push_rule_evaluator.tweaks_for_actions(push_action['actions'])
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badge = yield push_tools.get_badge_count(self.hs.get_datastore(), self.user_id)
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event = yield self.store.get_event(push_action['event_id'], allow_none=True)
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if event is None:
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defer.returnValue(True) # It's been redacted
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rejected = yield self.dispatch_push(event, tweaks, badge)
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if rejected is False:
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defer.returnValue(False)
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if isinstance(rejected, list) or isinstance(rejected, tuple):
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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.remove_pusher(
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self.app_id, pk, self.user_id
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)
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defer.returnValue(True)
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@defer.inlineCallbacks
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def _build_notification_dict(self, event, tweaks, badge):
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ctx = yield push_tools.get_context_for_event(
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self.state_handler, event, self.user_id
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)
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d = {
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'notification': {
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'id': event.event_id, # deprecated: remove soon
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'event_id': event.event_id,
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'room_id': event.room_id,
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'type': event.type,
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'sender': event.user_id,
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'counts': { # -- we don't mark messages as read yet so
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# we have no way of knowing
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# Just set the badge to 1 until we have read receipts
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'unread': badge,
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# 'missed_calls': 2
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},
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'devices': [
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{
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'app_id': self.app_id,
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'pushkey': self.pushkey,
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'pushkey_ts': long(self.pushkey_ts / 1000),
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'data': self.data_minus_url,
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'tweaks': tweaks
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}
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]
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}
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}
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if event.type == 'm.room.member':
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d['notification']['membership'] = event.content['membership']
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d['notification']['user_is_target'] = event.state_key == self.user_id
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if 'content' in event:
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d['notification']['content'] = event.content
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# We no longer send aliases separately, instead, we send the human
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# readable name of the room, which may be an alias.
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if 'sender_display_name' in ctx and len(ctx['sender_display_name']) > 0:
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d['notification']['sender_display_name'] = ctx['sender_display_name']
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if 'name' in ctx and len(ctx['name']) > 0:
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d['notification']['room_name'] = ctx['name']
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defer.returnValue(d)
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@defer.inlineCallbacks
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def dispatch_push(self, event, tweaks, badge):
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notification_dict = yield self._build_notification_dict(event, tweaks, badge)
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if not notification_dict:
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defer.returnValue([])
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try:
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resp = yield self.http_client.post_json_get_json(self.url, notification_dict)
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except:
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logger.warn("Failed to push %s ", self.url)
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defer.returnValue(False)
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rejected = []
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if 'rejected' in resp:
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rejected = resp['rejected']
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defer.returnValue(rejected)
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@defer.inlineCallbacks
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def _send_badge(self, badge):
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logger.info("Sending updated badge count %d to %r", badge, self.user_id)
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d = {
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'notification': {
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'id': '',
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'type': None,
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'sender': '',
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'counts': {
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'unread': badge
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},
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'devices': [
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{
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'app_id': self.app_id,
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'pushkey': self.pushkey,
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'pushkey_ts': long(self.pushkey_ts / 1000),
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'data': self.data_minus_url,
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}
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]
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}
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}
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try:
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resp = yield self.http_client.post_json_get_json(self.url, d)
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except:
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logger.exception("Failed to push %s ", self.url)
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defer.returnValue(False)
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rejected = []
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if 'rejected' in resp:
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rejected = resp['rejected']
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defer.returnValue(rejected)
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