mirror of https://github.com/zulip/zulip.git
1204 lines
46 KiB
Python
1204 lines
46 KiB
Python
# See https://zulip.readthedocs.io/en/latest/subsystems/notifications.html
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import asyncio
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import base64
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import logging
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import re
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from dataclasses import dataclass
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from functools import lru_cache
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from typing import TYPE_CHECKING, Any, Dict, List, Mapping, Optional, Sequence, Tuple, Type, Union
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import gcm
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import lxml.html
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import orjson
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from django.conf import settings
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from django.db import IntegrityError, transaction
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from django.db.models import F, Q
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from django.utils.timezone import now as timezone_now
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from django.utils.translation import gettext as _
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from django.utils.translation import override as override_language
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from typing_extensions import TypeAlias
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from zerver.lib.avatar import absolute_avatar_url
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from zerver.lib.exceptions import JsonableError
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from zerver.lib.message import access_message, huddle_users
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from zerver.lib.outgoing_http import OutgoingSession
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from zerver.lib.remote_server import send_json_to_push_bouncer, send_to_push_bouncer
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from zerver.lib.soft_deactivation import soft_reactivate_if_personal_notification
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from zerver.lib.timestamp import datetime_to_timestamp
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from zerver.models import (
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AbstractPushDeviceToken,
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ArchivedMessage,
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Message,
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NotificationTriggers,
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PushDeviceToken,
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Recipient,
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Stream,
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UserGroup,
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UserMessage,
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UserProfile,
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get_display_recipient,
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get_user_profile_by_id,
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)
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if TYPE_CHECKING:
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import aioapns
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logger = logging.getLogger(__name__)
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if settings.ZILENCER_ENABLED:
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from zilencer.models import RemotePushDeviceToken, RemoteZulipServer
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DeviceToken: TypeAlias = Union[PushDeviceToken, "RemotePushDeviceToken"]
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# We store the token as b64, but apns-client wants hex strings
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def b64_to_hex(data: str) -> str:
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return base64.b64decode(data).hex()
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def hex_to_b64(data: str) -> str:
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return base64.b64encode(bytes.fromhex(data)).decode()
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def get_message_stream_name_from_database(message: Message) -> str:
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"""
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Never use this function outside of the push-notifications
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codepath. Most of our code knows how to get streams
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up front in a more efficient manner.
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"""
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stream_id = message.recipient.type_id
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return Stream.objects.get(id=stream_id).name
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class UserPushIdentityCompat:
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"""Compatibility class for supporting the transition from remote servers
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sending their UserProfile ids to the bouncer to sending UserProfile uuids instead.
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Until we can drop support for receiving user_id, we need this
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class, because a user's identity in the push notification context
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may be represented either by an id or uuid.
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"""
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def __init__(self, user_id: Optional[int] = None, user_uuid: Optional[str] = None) -> None:
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assert user_id is not None or user_uuid is not None
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self.user_id = user_id
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self.user_uuid = user_uuid
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def filter_q(self) -> Q:
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"""
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This aims to support correctly querying for RemotePushDeviceToken.
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If only one of (user_id, user_uuid) is provided, the situation is trivial,
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If both are provided, we want to query for tokens matching EITHER the
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uuid or the id - because the user may have devices with old registrations,
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so user_id-based, as well as new registration with uuid. Notifications
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naturally should be sent to both.
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"""
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if self.user_id is not None and self.user_uuid is None:
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return Q(user_id=self.user_id)
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elif self.user_uuid is not None and self.user_id is None:
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return Q(user_uuid=self.user_uuid)
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else:
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assert self.user_id is not None and self.user_uuid is not None
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return Q(user_uuid=self.user_uuid) | Q(user_id=self.user_id)
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def __str__(self) -> str:
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result = ""
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if self.user_id is not None:
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result += f"<id:{self.user_id}>"
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if self.user_uuid is not None:
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result += f"<uuid:{self.user_uuid}>"
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return result
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def __eq__(self, other: Any) -> bool:
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if isinstance(other, UserPushIdentityCompat):
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return self.user_id == other.user_id and self.user_uuid == other.user_uuid
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return False
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#
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# Sending to APNs, for iOS
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#
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@dataclass
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class APNsContext:
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apns: "aioapns.APNs"
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loop: asyncio.AbstractEventLoop
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@lru_cache(maxsize=None)
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def get_apns_context() -> Optional[APNsContext]:
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# We lazily do this import as part of optimizing Zulip's base
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# import time.
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import aioapns
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# aioapns logs at "error" level for every non-successful request,
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# which fills the logs; see https://github.com/Fatal1ty/aioapns/issues/15
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logging.getLogger("aioapns").setLevel(logging.CRITICAL)
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if settings.APNS_CERT_FILE is None: # nocoverage
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return None
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# NB if called concurrently, this will make excess connections.
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# That's a little sloppy, but harmless unless a server gets
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# hammered with a ton of these all at once after startup.
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loop = asyncio.new_event_loop()
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async def make_apns() -> aioapns.APNs:
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return aioapns.APNs(
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client_cert=settings.APNS_CERT_FILE,
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topic=settings.APNS_TOPIC,
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max_connection_attempts=APNS_MAX_RETRIES,
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use_sandbox=settings.APNS_SANDBOX,
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)
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apns = loop.run_until_complete(make_apns())
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return APNsContext(apns=apns, loop=loop)
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def apns_enabled() -> bool:
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return settings.APNS_CERT_FILE is not None
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def modernize_apns_payload(data: Mapping[str, Any]) -> Mapping[str, Any]:
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"""Take a payload in an unknown Zulip version's format, and return in current format."""
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# TODO this isn't super robust as is -- if a buggy remote server
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# sends a malformed payload, we are likely to raise an exception.
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if "message_ids" in data:
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# The format sent by 1.6.0, from the earliest pre-1.6.0
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# version with bouncer support up until 613d093d7 pre-1.7.0:
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# 'alert': str, # just sender, and text about direct message/mention
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# 'message_ids': List[int], # always just one
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return {
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"alert": data["alert"],
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"badge": 0,
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"custom": {
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"zulip": {
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"message_ids": data["message_ids"],
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},
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},
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}
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else:
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# Something already compatible with the current format.
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# `alert` may be a string, or a dict with `title` and `body`.
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# In 1.7.0 and 1.7.1, before 0912b5ba8 pre-1.8.0, the only
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# item in `custom.zulip` is `message_ids`.
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return data
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APNS_MAX_RETRIES = 3
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def send_apple_push_notification(
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user_identity: UserPushIdentityCompat,
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devices: Sequence[DeviceToken],
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payload_data: Mapping[str, Any],
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remote: Optional["RemoteZulipServer"] = None,
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) -> None:
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if not devices:
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return
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# We lazily do the APNS imports as part of optimizing Zulip's base
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# import time; since these are only needed in the push
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# notification queue worker, it's best to only import them in the
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# code that needs them.
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import aioapns
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import aioapns.exceptions
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apns_context = get_apns_context()
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if apns_context is None:
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logger.debug(
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"APNs: Dropping a notification because nothing configured. "
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"Set PUSH_NOTIFICATION_BOUNCER_URL (or APNS_CERT_FILE)."
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)
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return
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if remote:
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assert settings.ZILENCER_ENABLED
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DeviceTokenClass: Type[AbstractPushDeviceToken] = RemotePushDeviceToken
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else:
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DeviceTokenClass = PushDeviceToken
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if remote:
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logger.info(
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"APNs: Sending notification for remote user %s:%s to %d devices",
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remote.uuid,
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user_identity,
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len(devices),
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)
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else:
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logger.info(
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"APNs: Sending notification for local user %s to %d devices",
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user_identity,
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len(devices),
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)
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payload_data = dict(modernize_apns_payload(payload_data))
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message = {**payload_data.pop("custom", {}), "aps": payload_data}
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for device in devices:
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# TODO obviously this should be made to actually use the async
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request = aioapns.NotificationRequest(
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device_token=device.token, message=message, time_to_live=24 * 3600
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)
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try:
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result = apns_context.loop.run_until_complete(
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apns_context.apns.send_notification(request)
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)
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except aioapns.exceptions.ConnectionError:
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logger.error(
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"APNs: ConnectionError sending for user %s to device %s; check certificate expiration",
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user_identity,
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device.token,
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)
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continue
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if result.is_successful:
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logger.info(
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"APNs: Success sending for user %s to device %s", user_identity, device.token
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)
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elif result.description in ["Unregistered", "BadDeviceToken", "DeviceTokenNotForTopic"]:
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logger.info(
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"APNs: Removing invalid/expired token %s (%s)", device.token, result.description
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)
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# We remove all entries for this token (There
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# could be multiple for different Zulip servers).
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DeviceTokenClass.objects.filter(token=device.token, kind=DeviceTokenClass.APNS).delete()
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else:
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logger.warning(
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"APNs: Failed to send for user %s to device %s: %s",
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user_identity,
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device.token,
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result.description,
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)
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#
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# Sending to GCM, for Android
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#
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class FCMSession(OutgoingSession):
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def __init__(self) -> None:
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# We don't set up retries, since the gcm package does that for us.
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super().__init__(role="fcm", timeout=5)
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def make_gcm_client() -> gcm.GCM: # nocoverage
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# From GCM upstream's doc for migrating to FCM:
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#
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# FCM supports HTTP and XMPP protocols that are virtually
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# identical to the GCM server protocols, so you don't need to
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# update your sending logic for the migration.
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#
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# https://developers.google.com/cloud-messaging/android/android-migrate-fcm
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#
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# The one thing we're required to change on the server is the URL of
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# the endpoint. So we get to keep using the GCM client library we've
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# been using (as long as we're happy with it) -- just monkey-patch in
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# that one change, because the library's API doesn't anticipate that
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# as a customization point.
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gcm.gcm.GCM_URL = "https://fcm.googleapis.com/fcm/send"
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return gcm.GCM(settings.ANDROID_GCM_API_KEY)
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if settings.ANDROID_GCM_API_KEY: # nocoverage
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gcm_client = make_gcm_client()
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else:
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gcm_client = None
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def gcm_enabled() -> bool: # nocoverage
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return gcm_client is not None
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# This is purely used in testing
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def send_android_push_notification_to_user(
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user_profile: UserProfile, data: Dict[str, Any], options: Dict[str, Any]
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) -> None:
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devices = list(PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.GCM))
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send_android_push_notification(
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UserPushIdentityCompat(user_id=user_profile.id), devices, data, options
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)
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def parse_gcm_options(options: Dict[str, Any], data: Dict[str, Any]) -> str:
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"""
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Parse GCM options, supplying defaults, and raising an error if invalid.
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The options permitted here form part of the Zulip notification
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bouncer's API. They are:
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`priority`: Passed through to GCM; see upstream doc linked below.
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Zulip servers should always set this; when unset, we guess a value
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based on the behavior of old server versions.
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Including unrecognized options is an error.
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For details on options' semantics, see this GCM upstream doc:
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https://firebase.google.com/docs/cloud-messaging/http-server-ref
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Returns `priority`.
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"""
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priority = options.pop("priority", None)
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if priority is None:
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# An older server. Identify if this seems to be an actual notification.
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if data.get("event") == "message":
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priority = "high"
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else: # `'event': 'remove'`, presumably
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priority = "normal"
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if priority not in ("normal", "high"):
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raise JsonableError(
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_(
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"Invalid GCM option to bouncer: priority {priority!r}",
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).format(priority=priority)
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)
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if options:
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# We're strict about the API; there is no use case for a newer Zulip
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# server talking to an older bouncer, so we only need to provide
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# one-way compatibility.
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raise JsonableError(
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_(
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"Invalid GCM options to bouncer: {options}",
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).format(options=orjson.dumps(options).decode())
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)
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return priority # when this grows a second option, can make it a tuple
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def send_android_push_notification(
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user_identity: UserPushIdentityCompat,
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devices: Sequence[DeviceToken],
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data: Dict[str, Any],
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options: Dict[str, Any],
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remote: Optional["RemoteZulipServer"] = None,
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) -> None:
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"""
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Send a GCM message to the given devices.
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See https://firebase.google.com/docs/cloud-messaging/http-server-ref
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for the GCM upstream API which this talks to.
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data: The JSON object (decoded) to send as the 'data' parameter of
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the GCM message.
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options: Additional options to control the GCM message sent.
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For details, see `parse_gcm_options`.
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"""
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if not devices:
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return
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if not gcm_client:
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logger.debug(
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"Skipping sending a GCM push notification since "
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"PUSH_NOTIFICATION_BOUNCER_URL and ANDROID_GCM_API_KEY are both unset"
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)
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return
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if remote:
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logger.info(
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"GCM: Sending notification for remote user %s:%s to %d devices",
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remote.uuid,
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user_identity,
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len(devices),
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)
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else:
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logger.info(
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"GCM: Sending notification for local user %s to %d devices", user_identity, len(devices)
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)
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reg_ids = [device.token for device in devices]
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priority = parse_gcm_options(options, data)
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try:
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# See https://firebase.google.com/docs/cloud-messaging/http-server-ref .
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# Two kwargs `retries` and `session` get eaten by `json_request`;
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# the rest pass through to the GCM server.
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#
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# One initial request plus 2 retries, with 5-second timeouts,
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# and expected 1 + 2 seconds (the gcm module jitters its
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# backoff by ±50%, so worst case * 1.5) between them, totals
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# 18s expected, up to 19.5s worst case.
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res = gcm_client.json_request(
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registration_ids=reg_ids,
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priority=priority,
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data=data,
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retries=2,
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session=FCMSession(),
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)
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except OSError:
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logger.warning("Error while pushing to GCM", exc_info=True)
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return
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if res and "success" in res:
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for reg_id, msg_id in res["success"].items():
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logger.info("GCM: Sent %s as %s", reg_id, msg_id)
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if remote:
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assert settings.ZILENCER_ENABLED
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DeviceTokenClass: Type[AbstractPushDeviceToken] = RemotePushDeviceToken
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else:
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DeviceTokenClass = PushDeviceToken
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# res.canonical will contain results when there are duplicate registrations for the same
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# device. The "canonical" registration is the latest registration made by the device.
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# Ref: https://developer.android.com/google/gcm/adv.html#canonical
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if "canonical" in res:
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for reg_id, new_reg_id in res["canonical"].items():
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if reg_id == new_reg_id:
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# I'm not sure if this should happen. In any case, not really actionable.
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logger.warning("GCM: Got canonical ref but it already matches our ID %s!", reg_id)
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elif not DeviceTokenClass.objects.filter(
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token=new_reg_id, kind=DeviceTokenClass.GCM
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).count():
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# This case shouldn't happen; any time we get a canonical ref it should have been
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# previously registered in our system.
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#
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# That said, recovery is easy: just update the current PDT object to use the new ID.
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logger.warning(
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"GCM: Got canonical ref %s replacing %s but new ID not registered! Updating.",
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new_reg_id,
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reg_id,
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)
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DeviceTokenClass.objects.filter(token=reg_id, kind=DeviceTokenClass.GCM).update(
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token=new_reg_id
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)
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else:
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# Since we know the new ID is registered in our system we can just drop the old one.
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logger.info("GCM: Got canonical ref %s, dropping %s", new_reg_id, reg_id)
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DeviceTokenClass.objects.filter(token=reg_id, kind=DeviceTokenClass.GCM).delete()
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if "errors" in res:
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for error, reg_ids in res["errors"].items():
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if error in ["NotRegistered", "InvalidRegistration"]:
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for reg_id in reg_ids:
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logger.info("GCM: Removing %s", reg_id)
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# We remove all entries for this token (There
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# could be multiple for different Zulip servers).
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DeviceTokenClass.objects.filter(
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token=reg_id, kind=DeviceTokenClass.GCM
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).delete()
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else:
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for reg_id in reg_ids:
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logger.warning("GCM: Delivery to %s failed: %s", reg_id, error)
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# python-gcm handles retrying of the unsent messages.
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# Ref: https://github.com/geeknam/python-gcm/blob/master/gcm/gcm.py#L497
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#
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# Sending to a bouncer
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#
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def uses_notification_bouncer() -> bool:
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return settings.PUSH_NOTIFICATION_BOUNCER_URL is not None
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|
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def send_notifications_to_bouncer(
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user_profile_id: int,
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apns_payload: Dict[str, Any],
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gcm_payload: Dict[str, Any],
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|
gcm_options: Dict[str, Any],
|
|
) -> Tuple[int, int]:
|
|
post_data = {
|
|
"user_uuid": str(get_user_profile_by_id(user_profile_id).uuid),
|
|
# user_uuid is the intended future format, but we also need to send user_id
|
|
# to avoid breaking old mobile registrations, which were made with user_id.
|
|
"user_id": user_profile_id,
|
|
"apns_payload": apns_payload,
|
|
"gcm_payload": gcm_payload,
|
|
"gcm_options": gcm_options,
|
|
}
|
|
# Calls zilencer.views.remote_server_notify_push
|
|
response_data = send_json_to_push_bouncer("POST", "push/notify", post_data)
|
|
assert isinstance(response_data["total_android_devices"], int)
|
|
assert isinstance(response_data["total_apple_devices"], int)
|
|
|
|
return response_data["total_android_devices"], response_data["total_apple_devices"]
|
|
|
|
|
|
#
|
|
# Managing device tokens
|
|
#
|
|
|
|
|
|
def add_push_device_token(
|
|
user_profile: UserProfile, token_str: str, kind: int, ios_app_id: Optional[str] = None
|
|
) -> PushDeviceToken:
|
|
logger.info(
|
|
"Registering push device: %d %r %d %r", user_profile.id, token_str, kind, ios_app_id
|
|
)
|
|
|
|
# Regardless of whether we're using the push notifications
|
|
# bouncer, we want to store a PushDeviceToken record locally.
|
|
# These can be used to discern whether the user has any mobile
|
|
# devices configured, and is also where we will store encryption
|
|
# keys for mobile push notifications.
|
|
try:
|
|
with transaction.atomic():
|
|
token = PushDeviceToken.objects.create(
|
|
user_id=user_profile.id,
|
|
kind=kind,
|
|
token=token_str,
|
|
ios_app_id=ios_app_id,
|
|
# last_updated is to be renamed to date_created.
|
|
last_updated=timezone_now(),
|
|
)
|
|
except IntegrityError:
|
|
token = PushDeviceToken.objects.get(
|
|
user_id=user_profile.id,
|
|
kind=kind,
|
|
token=token_str,
|
|
)
|
|
|
|
# If we're sending things to the push notification bouncer
|
|
# register this user with them here
|
|
if uses_notification_bouncer():
|
|
post_data = {
|
|
"server_uuid": settings.ZULIP_ORG_ID,
|
|
"user_uuid": str(user_profile.uuid),
|
|
# user_id is sent so that the bouncer can delete any pre-existing registrations
|
|
# for this user+device to avoid duplication upon adding the uuid registration.
|
|
"user_id": str(user_profile.id),
|
|
"token": token_str,
|
|
"token_kind": kind,
|
|
}
|
|
|
|
if kind == PushDeviceToken.APNS:
|
|
post_data["ios_app_id"] = ios_app_id
|
|
|
|
logger.info("Sending new push device to bouncer: %r", post_data)
|
|
# Calls zilencer.views.register_remote_push_device
|
|
send_to_push_bouncer("POST", "push/register", post_data)
|
|
|
|
return token
|
|
|
|
|
|
def remove_push_device_token(user_profile: UserProfile, token_str: str, kind: int) -> None:
|
|
try:
|
|
token = PushDeviceToken.objects.get(token=token_str, kind=kind, user=user_profile)
|
|
token.delete()
|
|
except PushDeviceToken.DoesNotExist:
|
|
# If we are using bouncer, don't raise the exception. It will
|
|
# be raised by the code below eventually. This is important
|
|
# during the transition period after upgrading to a version
|
|
# that stores local PushDeviceToken objects even when using
|
|
# the push notifications bouncer.
|
|
if not uses_notification_bouncer():
|
|
raise JsonableError(_("Token does not exist"))
|
|
|
|
# If we're sending things to the push notification bouncer
|
|
# unregister this user with them here
|
|
if uses_notification_bouncer():
|
|
# TODO: Make this a remove item
|
|
post_data = {
|
|
"server_uuid": settings.ZULIP_ORG_ID,
|
|
# We don't know here if the token was registered with uuid
|
|
# or using the legacy id format, so we need to send both.
|
|
"user_uuid": str(user_profile.uuid),
|
|
"user_id": user_profile.id,
|
|
"token": token_str,
|
|
"token_kind": kind,
|
|
}
|
|
# Calls zilencer.views.unregister_remote_push_device
|
|
send_to_push_bouncer("POST", "push/unregister", post_data)
|
|
|
|
|
|
def clear_push_device_tokens(user_profile_id: int) -> None:
|
|
# Deletes all of a user's PushDeviceTokens.
|
|
if uses_notification_bouncer():
|
|
user_uuid = str(get_user_profile_by_id(user_profile_id).uuid)
|
|
post_data = {
|
|
"server_uuid": settings.ZULIP_ORG_ID,
|
|
# We want to clear all registered token, and they may have
|
|
# been registered with either uuid or id.
|
|
"user_uuid": user_uuid,
|
|
"user_id": user_profile_id,
|
|
}
|
|
send_to_push_bouncer("POST", "push/unregister/all", post_data)
|
|
return
|
|
|
|
PushDeviceToken.objects.filter(user_id=user_profile_id).delete()
|
|
|
|
|
|
#
|
|
# Push notifications in general
|
|
#
|
|
|
|
|
|
def push_notifications_enabled() -> bool:
|
|
"""True just if this server has configured a way to send push notifications."""
|
|
if (
|
|
uses_notification_bouncer()
|
|
and settings.ZULIP_ORG_KEY is not None
|
|
and settings.ZULIP_ORG_ID is not None
|
|
): # nocoverage
|
|
# We have the needed configuration to send push notifications through
|
|
# the bouncer. Better yet would be to confirm that this config actually
|
|
# works -- e.g., that we have ever successfully sent to the bouncer --
|
|
# but this is a good start.
|
|
return True
|
|
if settings.DEVELOPMENT and (apns_enabled() or gcm_enabled()): # nocoverage
|
|
# Since much of the notifications logic is platform-specific, the mobile
|
|
# developers often work on just one platform at a time, so we should
|
|
# only require one to be configured.
|
|
return True
|
|
elif apns_enabled() and gcm_enabled(): # nocoverage
|
|
# We have the needed configuration to send through APNs and GCM directly
|
|
# (i.e., we are the bouncer, presumably.) Again, assume it actually works.
|
|
return True
|
|
return False
|
|
|
|
|
|
def initialize_push_notifications() -> None:
|
|
if not push_notifications_enabled():
|
|
if settings.DEVELOPMENT and not settings.TEST_SUITE: # nocoverage
|
|
# Avoid unnecessary spam on development environment startup
|
|
return
|
|
logger.warning(
|
|
"Mobile push notifications are not configured.\n "
|
|
"See https://zulip.readthedocs.io/en/latest/"
|
|
"production/mobile-push-notifications.html"
|
|
)
|
|
|
|
|
|
def get_gcm_alert(
|
|
message: Message, trigger: str, mentioned_user_group_name: Optional[str] = None
|
|
) -> str:
|
|
"""
|
|
Determine what alert string to display based on the missed messages.
|
|
"""
|
|
sender_str = message.sender.full_name
|
|
if (
|
|
message.recipient.type == Recipient.HUDDLE
|
|
and trigger == NotificationTriggers.DIRECT_MESSAGE
|
|
):
|
|
return f"New direct group message from {sender_str}"
|
|
elif (
|
|
message.recipient.type == Recipient.PERSONAL
|
|
and trigger == NotificationTriggers.DIRECT_MESSAGE
|
|
):
|
|
return f"New direct message from {sender_str}"
|
|
|
|
assert message.is_stream_message()
|
|
stream_name = get_message_stream_name_from_database(message)
|
|
|
|
if trigger == NotificationTriggers.MENTION:
|
|
if mentioned_user_group_name is None:
|
|
return f"{sender_str} mentioned you in #{stream_name}"
|
|
else:
|
|
return f"{sender_str} mentioned @{mentioned_user_group_name} in #{stream_name}"
|
|
elif trigger == NotificationTriggers.TOPIC_WILDCARD_MENTION_IN_FOLLOWED_TOPIC:
|
|
return "TODO - 2"
|
|
elif trigger == NotificationTriggers.STREAM_WILDCARD_MENTION_IN_FOLLOWED_TOPIC:
|
|
return "TODO"
|
|
elif trigger == NotificationTriggers.TOPIC_WILDCARD_MENTION:
|
|
return f"{sender_str} mentioned all topic participants in #{stream_name} > {message.topic_name()}"
|
|
elif trigger == NotificationTriggers.STREAM_WILDCARD_MENTION:
|
|
return f"{sender_str} mentioned everyone in #{stream_name}"
|
|
else:
|
|
assert trigger == NotificationTriggers.STREAM_PUSH
|
|
return f"New stream message from {sender_str} in #{stream_name}"
|
|
|
|
|
|
def get_mobile_push_content(rendered_content: str) -> str:
|
|
def get_text(elem: lxml.html.HtmlElement) -> str:
|
|
# Convert default emojis to their Unicode equivalent.
|
|
classes = elem.get("class", "")
|
|
if "emoji" in classes:
|
|
match = re.search(r"emoji-(?P<emoji_code>\S+)", classes)
|
|
if match:
|
|
emoji_code = match.group("emoji_code")
|
|
char_repr = ""
|
|
for codepoint in emoji_code.split("-"):
|
|
char_repr += chr(int(codepoint, 16))
|
|
return char_repr
|
|
# Handles realm emojis, avatars etc.
|
|
if elem.tag == "img":
|
|
return elem.get("alt", "")
|
|
if elem.tag == "blockquote":
|
|
return "" # To avoid empty line before quote text
|
|
return elem.text or ""
|
|
|
|
def format_as_quote(quote_text: str) -> str:
|
|
return "".join(
|
|
f"> {line}\n" for line in quote_text.splitlines() if line # Remove empty lines
|
|
)
|
|
|
|
def render_olist(ol: lxml.html.HtmlElement) -> str:
|
|
items = []
|
|
counter = int(ol.get("start")) if ol.get("start") else 1
|
|
nested_levels = len(list(ol.iterancestors("ol")))
|
|
indent = ("\n" + " " * nested_levels) if nested_levels else ""
|
|
|
|
for li in ol:
|
|
items.append(indent + str(counter) + ". " + process(li).strip())
|
|
counter += 1
|
|
|
|
return "\n".join(items)
|
|
|
|
def render_spoiler(elem: lxml.html.HtmlElement) -> str:
|
|
header = elem.find_class("spoiler-header")[0]
|
|
text = process(header).strip()
|
|
if len(text) == 0:
|
|
return "(…)\n"
|
|
return f"{text} (…)\n"
|
|
|
|
def process(elem: lxml.html.HtmlElement) -> str:
|
|
plain_text = ""
|
|
if elem.tag == "ol":
|
|
plain_text = render_olist(elem)
|
|
elif "spoiler-block" in elem.get("class", ""):
|
|
plain_text += render_spoiler(elem)
|
|
else:
|
|
plain_text = get_text(elem)
|
|
sub_text = ""
|
|
for child in elem:
|
|
sub_text += process(child)
|
|
if elem.tag == "blockquote":
|
|
sub_text = format_as_quote(sub_text)
|
|
plain_text += sub_text
|
|
plain_text += elem.tail or ""
|
|
return plain_text
|
|
|
|
if settings.PUSH_NOTIFICATION_REDACT_CONTENT:
|
|
return (
|
|
"*"
|
|
+ _(
|
|
"This organization has disabled including message content in mobile push notifications"
|
|
)
|
|
+ "*"
|
|
)
|
|
|
|
elem = lxml.html.fragment_fromstring(rendered_content, create_parent=True)
|
|
plain_text = process(elem)
|
|
return plain_text
|
|
|
|
|
|
def truncate_content(content: str) -> Tuple[str, bool]:
|
|
# We use Unicode character 'HORIZONTAL ELLIPSIS' (U+2026) instead
|
|
# of three dots as this saves two extra characters for textual
|
|
# content. This function will need to be updated to handle Unicode
|
|
# combining characters and tags when we start supporting themself.
|
|
if len(content) <= 200:
|
|
return content, False
|
|
return content[:200] + "…", True
|
|
|
|
|
|
def get_base_payload(user_profile: UserProfile) -> Dict[str, Any]:
|
|
"""Common fields for all notification payloads."""
|
|
data: Dict[str, Any] = {}
|
|
|
|
# These will let the app support logging into multiple realms and servers.
|
|
data["server"] = settings.EXTERNAL_HOST
|
|
data["realm_id"] = user_profile.realm.id
|
|
data["realm_uri"] = user_profile.realm.uri
|
|
data["user_id"] = user_profile.id
|
|
|
|
return data
|
|
|
|
|
|
def get_message_payload(
|
|
user_profile: UserProfile,
|
|
message: Message,
|
|
mentioned_user_group_id: Optional[int] = None,
|
|
mentioned_user_group_name: Optional[str] = None,
|
|
) -> Dict[str, Any]:
|
|
"""Common fields for `message` payloads, for all platforms."""
|
|
data = get_base_payload(user_profile)
|
|
|
|
# `sender_id` is preferred, but some existing versions use `sender_email`.
|
|
data["sender_id"] = message.sender.id
|
|
data["sender_email"] = message.sender.email
|
|
if mentioned_user_group_id is not None:
|
|
assert mentioned_user_group_name is not None
|
|
data["mentioned_user_group_id"] = mentioned_user_group_id
|
|
data["mentioned_user_group_name"] = mentioned_user_group_name
|
|
|
|
if message.recipient.type == Recipient.STREAM:
|
|
data["recipient_type"] = "stream"
|
|
data["stream"] = get_message_stream_name_from_database(message)
|
|
data["stream_id"] = message.recipient.type_id
|
|
data["topic"] = message.topic_name()
|
|
elif message.recipient.type == Recipient.HUDDLE:
|
|
data["recipient_type"] = "private"
|
|
data["pm_users"] = huddle_users(message.recipient.id)
|
|
else: # Recipient.PERSONAL
|
|
data["recipient_type"] = "private"
|
|
|
|
return data
|
|
|
|
|
|
def get_apns_alert_title(message: Message) -> str:
|
|
"""
|
|
On an iOS notification, this is the first bolded line.
|
|
"""
|
|
if message.recipient.type == Recipient.HUDDLE:
|
|
recipients = get_display_recipient(message.recipient)
|
|
assert isinstance(recipients, list)
|
|
return ", ".join(sorted(r["full_name"] for r in recipients))
|
|
elif message.is_stream_message():
|
|
stream_name = get_message_stream_name_from_database(message)
|
|
return f"#{stream_name} > {message.topic_name()}"
|
|
# For 1:1 direct messages, we just show the sender name.
|
|
return message.sender.full_name
|
|
|
|
|
|
def get_apns_alert_subtitle(
|
|
user_profile: UserProfile,
|
|
message: Message,
|
|
trigger: str,
|
|
mentioned_user_group_name: Optional[str] = None,
|
|
) -> str:
|
|
"""
|
|
On an iOS notification, this is the second bolded line.
|
|
"""
|
|
if trigger == NotificationTriggers.MENTION:
|
|
if mentioned_user_group_name is not None:
|
|
return _("{full_name} mentioned @{user_group_name}:").format(
|
|
full_name=message.sender.full_name, user_group_name=mentioned_user_group_name
|
|
)
|
|
else:
|
|
return _("{full_name} mentioned you:").format(full_name=message.sender.full_name)
|
|
elif trigger == NotificationTriggers.TOPIC_WILDCARD_MENTION_IN_FOLLOWED_TOPIC:
|
|
return _("TODO - 2")
|
|
elif trigger == NotificationTriggers.STREAM_WILDCARD_MENTION_IN_FOLLOWED_TOPIC:
|
|
return _("TODO")
|
|
elif trigger == NotificationTriggers.TOPIC_WILDCARD_MENTION:
|
|
return _("{full_name} mentioned all topic participants:").format(
|
|
full_name=message.sender.full_name
|
|
)
|
|
elif trigger == NotificationTriggers.STREAM_WILDCARD_MENTION:
|
|
return _("{full_name} mentioned everyone:").format(full_name=message.sender.full_name)
|
|
elif message.recipient.type == Recipient.PERSONAL:
|
|
return ""
|
|
# For group direct messages, or regular messages to a stream,
|
|
# just use a colon to indicate this is the sender.
|
|
return message.sender.full_name + ":"
|
|
|
|
|
|
def get_apns_badge_count(
|
|
user_profile: UserProfile, read_messages_ids: Optional[Sequence[int]] = []
|
|
) -> int:
|
|
# NOTE: We have temporarily set get_apns_badge_count to always
|
|
# return 0 until we can debug a likely mobile app side issue with
|
|
# handling notifications while the app is open.
|
|
return 0
|
|
|
|
|
|
def get_apns_badge_count_future(
|
|
user_profile: UserProfile, read_messages_ids: Optional[Sequence[int]] = []
|
|
) -> int:
|
|
# Future implementation of get_apns_badge_count; unused but
|
|
# we expect to use this once we resolve client-side bugs.
|
|
return (
|
|
UserMessage.objects.filter(user_profile=user_profile)
|
|
.extra(where=[UserMessage.where_active_push_notification()])
|
|
.exclude(
|
|
# If we've just marked some messages as read, they're still
|
|
# marked as having active notifications; we'll clear that flag
|
|
# only after we've sent that update to the devices. So we need
|
|
# to exclude them explicitly from the count.
|
|
message_id__in=read_messages_ids
|
|
)
|
|
.count()
|
|
)
|
|
|
|
|
|
def get_message_payload_apns(
|
|
user_profile: UserProfile,
|
|
message: Message,
|
|
trigger: str,
|
|
mentioned_user_group_id: Optional[int] = None,
|
|
mentioned_user_group_name: Optional[str] = None,
|
|
) -> Dict[str, Any]:
|
|
"""A `message` payload for iOS, via APNs."""
|
|
zulip_data = get_message_payload(
|
|
user_profile, message, mentioned_user_group_id, mentioned_user_group_name
|
|
)
|
|
zulip_data.update(
|
|
message_ids=[message.id],
|
|
)
|
|
|
|
assert message.rendered_content is not None
|
|
with override_language(user_profile.default_language):
|
|
content, _ = truncate_content(get_mobile_push_content(message.rendered_content))
|
|
apns_data = {
|
|
"alert": {
|
|
"title": get_apns_alert_title(message),
|
|
"subtitle": get_apns_alert_subtitle(
|
|
user_profile, message, trigger, mentioned_user_group_name
|
|
),
|
|
"body": content,
|
|
},
|
|
"sound": "default",
|
|
"badge": get_apns_badge_count(user_profile),
|
|
"custom": {"zulip": zulip_data},
|
|
}
|
|
return apns_data
|
|
|
|
|
|
def get_message_payload_gcm(
|
|
user_profile: UserProfile,
|
|
message: Message,
|
|
trigger: str,
|
|
mentioned_user_group_id: Optional[int] = None,
|
|
mentioned_user_group_name: Optional[str] = None,
|
|
) -> Tuple[Dict[str, Any], Dict[str, Any]]:
|
|
"""A `message` payload + options, for Android via GCM/FCM."""
|
|
data = get_message_payload(
|
|
user_profile, message, mentioned_user_group_id, mentioned_user_group_name
|
|
)
|
|
assert message.rendered_content is not None
|
|
with override_language(user_profile.default_language):
|
|
content, truncated = truncate_content(get_mobile_push_content(message.rendered_content))
|
|
data.update(
|
|
event="message",
|
|
alert=get_gcm_alert(message, trigger, mentioned_user_group_name),
|
|
zulip_message_id=message.id, # message_id is reserved for CCS
|
|
time=datetime_to_timestamp(message.date_sent),
|
|
content=content,
|
|
content_truncated=truncated,
|
|
sender_full_name=message.sender.full_name,
|
|
sender_avatar_url=absolute_avatar_url(message.sender),
|
|
)
|
|
gcm_options = {"priority": "high"}
|
|
return data, gcm_options
|
|
|
|
|
|
def get_remove_payload_gcm(
|
|
user_profile: UserProfile,
|
|
message_ids: List[int],
|
|
) -> Tuple[Dict[str, Any], Dict[str, Any]]:
|
|
"""A `remove` payload + options, for Android via GCM/FCM."""
|
|
gcm_payload = get_base_payload(user_profile)
|
|
gcm_payload.update(
|
|
event="remove",
|
|
zulip_message_ids=",".join(str(id) for id in message_ids),
|
|
# Older clients (all clients older than 2019-02-13) look only at
|
|
# `zulip_message_id` and ignore `zulip_message_ids`. Do our best.
|
|
zulip_message_id=message_ids[0],
|
|
)
|
|
gcm_options = {"priority": "normal"}
|
|
return gcm_payload, gcm_options
|
|
|
|
|
|
def get_remove_payload_apns(user_profile: UserProfile, message_ids: List[int]) -> Dict[str, Any]:
|
|
zulip_data = get_base_payload(user_profile)
|
|
zulip_data.update(
|
|
event="remove",
|
|
zulip_message_ids=",".join(str(id) for id in message_ids),
|
|
)
|
|
apns_data = {
|
|
"badge": get_apns_badge_count(user_profile, message_ids),
|
|
"custom": {"zulip": zulip_data},
|
|
}
|
|
return apns_data
|
|
|
|
|
|
def handle_remove_push_notification(user_profile_id: int, message_ids: List[int]) -> None:
|
|
"""This should be called when a message that previously had a
|
|
mobile push notification executed is read. This triggers a push to the
|
|
mobile app, when the message is read on the server, to remove the
|
|
message from the notification.
|
|
"""
|
|
if not push_notifications_enabled():
|
|
return
|
|
|
|
user_profile = get_user_profile_by_id(user_profile_id)
|
|
|
|
# We may no longer have access to the message here; for example,
|
|
# the user (1) got a message, (2) read the message in the web UI,
|
|
# and then (3) it was deleted. When trying to send the push
|
|
# notification for (2), after (3) has happened, there is no
|
|
# message to fetch -- but we nonetheless want to remove the mobile
|
|
# notification. Because of this, the usual access control of
|
|
# `bulk_access_messages_expect_usermessage` is skipped here.
|
|
# Because of this, no access to the Message objects should be
|
|
# done; they are treated as a list of opaque ints.
|
|
|
|
# APNs has a 4KB limit on the maximum size of messages, which
|
|
# translated to several hundred message IDs in one of these
|
|
# notifications. In rare cases, it's possible for someone to mark
|
|
# thousands of push notification eligible messages as read at
|
|
# once. We could handle this situation with a loop, but we choose
|
|
# to truncate instead to avoid extra network traffic, because it's
|
|
# very likely the user has manually cleared the notifications in
|
|
# their mobile device's UI anyway.
|
|
#
|
|
# When truncating, we keep only the newest N messages in this
|
|
# remove event. This is optimal because older messages are the
|
|
# ones most likely to have already been manually cleared at some
|
|
# point in the past.
|
|
#
|
|
# We choose 200 here because a 10-digit message ID plus a comma and
|
|
# space consume 12 bytes, and 12 x 200 = 2400 bytes is still well
|
|
# below the 4KB limit (leaving plenty of space for metadata).
|
|
MAX_APNS_MESSAGE_IDS = 200
|
|
truncated_message_ids = sorted(message_ids)[-MAX_APNS_MESSAGE_IDS:]
|
|
gcm_payload, gcm_options = get_remove_payload_gcm(user_profile, truncated_message_ids)
|
|
apns_payload = get_remove_payload_apns(user_profile, truncated_message_ids)
|
|
|
|
if uses_notification_bouncer():
|
|
send_notifications_to_bouncer(user_profile_id, apns_payload, gcm_payload, gcm_options)
|
|
else:
|
|
user_identity = UserPushIdentityCompat(user_id=user_profile_id)
|
|
android_devices = list(
|
|
PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.GCM)
|
|
)
|
|
apple_devices = list(
|
|
PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.APNS)
|
|
)
|
|
if android_devices:
|
|
send_android_push_notification(user_identity, android_devices, gcm_payload, gcm_options)
|
|
if apple_devices:
|
|
send_apple_push_notification(user_identity, apple_devices, apns_payload)
|
|
|
|
# We intentionally use the non-truncated message_ids here. We are
|
|
# assuming in this very rare case that the user has manually
|
|
# dismissed these notifications on the device side, and the server
|
|
# should no longer track them as outstanding notifications.
|
|
with transaction.atomic(savepoint=False):
|
|
UserMessage.select_for_update_query().filter(
|
|
user_profile_id=user_profile_id,
|
|
message_id__in=message_ids,
|
|
).update(flags=F("flags").bitand(~UserMessage.flags.active_mobile_push_notification))
|
|
|
|
|
|
def handle_push_notification(user_profile_id: int, missed_message: Dict[str, Any]) -> None:
|
|
"""
|
|
missed_message is the event received by the
|
|
zerver.worker.queue_processors.PushNotificationWorker.consume function.
|
|
"""
|
|
if not push_notifications_enabled():
|
|
return
|
|
user_profile = get_user_profile_by_id(user_profile_id)
|
|
|
|
if user_profile.is_bot: # nocoverage
|
|
# We don't expect to reach here for bot users. However, this code exists
|
|
# to find and throw away any pre-existing events in the queue while
|
|
# upgrading from versions before our notifiability logic was implemented.
|
|
# TODO/compatibility: This block can be removed when one can no longer
|
|
# upgrade from versions <= 4.0 to versions >= 5.0
|
|
logger.warning(
|
|
"Send-push-notification event found for bot user %s. Skipping.", user_profile_id
|
|
)
|
|
return
|
|
|
|
if not (
|
|
user_profile.enable_offline_push_notifications
|
|
or user_profile.enable_online_push_notifications
|
|
):
|
|
# BUG: Investigate why it's possible to get here.
|
|
return # nocoverage
|
|
|
|
with transaction.atomic(savepoint=False):
|
|
try:
|
|
(message, user_message) = access_message(
|
|
user_profile, missed_message["message_id"], lock_message=True
|
|
)
|
|
except JsonableError:
|
|
if ArchivedMessage.objects.filter(id=missed_message["message_id"]).exists():
|
|
# If the cause is a race with the message being deleted,
|
|
# that's normal and we have no need to log an error.
|
|
return
|
|
logging.info(
|
|
"Unexpected message access failure handling push notifications: %s %s",
|
|
user_profile.id,
|
|
missed_message["message_id"],
|
|
)
|
|
return
|
|
|
|
if user_message is not None:
|
|
# If the user has read the message already, don't push-notify.
|
|
if user_message.flags.read or user_message.flags.active_mobile_push_notification:
|
|
return
|
|
|
|
# Otherwise, we mark the message as having an active mobile
|
|
# push notification, so that we can send revocation messages
|
|
# later.
|
|
user_message.flags.active_mobile_push_notification = True
|
|
user_message.save(update_fields=["flags"])
|
|
else:
|
|
# Users should only be getting push notifications into this
|
|
# queue for messages they haven't received if they're
|
|
# long-term idle; anything else is likely a bug.
|
|
if not user_profile.long_term_idle:
|
|
logger.error(
|
|
"Could not find UserMessage with message_id %s and user_id %s",
|
|
missed_message["message_id"],
|
|
user_profile_id,
|
|
exc_info=True,
|
|
)
|
|
return
|
|
|
|
trigger = missed_message["trigger"]
|
|
|
|
# TODO/compatibility: Translation code for the rename of
|
|
# `wildcard_mentioned` to `stream_wildcard_mentioned`.
|
|
# Remove this when one can no longer directly upgrade from 7.x to main.
|
|
if trigger == "wildcard_mentioned":
|
|
trigger = NotificationTriggers.STREAM_WILDCARD_MENTION # nocoverage
|
|
|
|
# TODO/compatibility: Translation code for the rename of
|
|
# `followed_topic_wildcard_mentioned` to `stream_wildcard_mentioned_in_followed_topic`.
|
|
# Remove this when one can no longer directly upgrade from 7.x to main.
|
|
if trigger == "followed_topic_wildcard_mentioned":
|
|
trigger = NotificationTriggers.STREAM_WILDCARD_MENTION_IN_FOLLOWED_TOPIC # nocoverage
|
|
|
|
# TODO/compatibility: Translation code for the rename of
|
|
# `private_message` to `direct_message`. Remove this when
|
|
# one can no longer directly upgrade from 7.x to main.
|
|
if trigger == "private_message":
|
|
trigger = NotificationTriggers.DIRECT_MESSAGE # nocoverage
|
|
|
|
mentioned_user_group_name = None
|
|
# mentioned_user_group_id will be None if the user is personally mentioned
|
|
# regardless whether they are a member of the mentioned user group in the
|
|
# message or not.
|
|
mentioned_user_group_id = missed_message.get("mentioned_user_group_id")
|
|
|
|
if mentioned_user_group_id is not None:
|
|
user_group = UserGroup.objects.get(id=mentioned_user_group_id, realm=user_profile.realm)
|
|
mentioned_user_group_name = user_group.name
|
|
|
|
# Soft reactivate if pushing to a long_term_idle user that is personally mentioned
|
|
soft_reactivate_if_personal_notification(user_profile, {trigger}, mentioned_user_group_name)
|
|
|
|
apns_payload = get_message_payload_apns(
|
|
user_profile, message, trigger, mentioned_user_group_id, mentioned_user_group_name
|
|
)
|
|
gcm_payload, gcm_options = get_message_payload_gcm(
|
|
user_profile, message, trigger, mentioned_user_group_id, mentioned_user_group_name
|
|
)
|
|
logger.info("Sending push notifications to mobile clients for user %s", user_profile_id)
|
|
|
|
if uses_notification_bouncer():
|
|
total_android_devices, total_apple_devices = send_notifications_to_bouncer(
|
|
user_profile_id, apns_payload, gcm_payload, gcm_options
|
|
)
|
|
logger.info(
|
|
"Sent mobile push notifications for user %s through bouncer: %s via FCM devices, %s via APNs devices",
|
|
user_profile_id,
|
|
total_android_devices,
|
|
total_apple_devices,
|
|
)
|
|
return
|
|
|
|
android_devices = list(
|
|
PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.GCM)
|
|
)
|
|
|
|
apple_devices = list(
|
|
PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.APNS)
|
|
)
|
|
|
|
logger.info(
|
|
"Sending mobile push notifications for local user %s: %s via FCM devices, %s via APNs devices",
|
|
user_profile_id,
|
|
len(android_devices),
|
|
len(apple_devices),
|
|
)
|
|
user_identity = UserPushIdentityCompat(user_id=user_profile.id)
|
|
send_apple_push_notification(user_identity, apple_devices, apns_payload)
|
|
send_android_push_notification(user_identity, android_devices, gcm_payload, gcm_options)
|