import datetime import logging from collections import Counter from typing import Any, Dict, List, Optional, Type, TypeVar, Union from uuid import UUID import orjson from django.core.exceptions import ValidationError from django.core.validators import URLValidator, validate_email from django.db import IntegrityError, transaction from django.db.models import Model from django.http import HttpRequest, HttpResponse from django.utils.crypto import constant_time_compare from django.utils.timezone import now as timezone_now from django.utils.translation import gettext as _ from django.utils.translation import gettext as err_ from django.views.decorators.csrf import csrf_exempt from pydantic import BaseModel, ConfigDict, Json from analytics.lib.counts import ( BOUNCER_ONLY_REMOTE_COUNT_STAT_PROPERTIES, COUNT_STATS, REMOTE_INSTALLATION_COUNT_STATS, do_increment_logging_stat, ) from corporate.lib.stripe import do_deactivate_remote_server from zerver.decorator import require_post from zerver.lib.exceptions import JsonableError from zerver.lib.push_notifications import ( InvalidRemotePushDeviceTokenError, UserPushIdentityCompat, send_android_push_notification, send_apple_push_notification, send_test_push_notification_directly_to_devices, ) from zerver.lib.remote_server import RealmDataForAnalytics from zerver.lib.request import REQ, has_request_variables from zerver.lib.response import json_success from zerver.lib.timestamp import timestamp_to_datetime from zerver.lib.typed_endpoint import JsonBodyPayload, typed_endpoint from zerver.lib.validator import check_capped_string, check_int, check_string_fixed_length from zerver.views.push_notifications import check_app_id, validate_token from zilencer.auth import InvalidZulipServerKeyError from zilencer.models import ( RemoteInstallationCount, RemotePushDeviceToken, RemoteRealm, RemoteRealmAuditLog, RemoteRealmCount, RemoteZulipServer, RemoteZulipServerAuditLog, ) logger = logging.getLogger(__name__) def validate_uuid(uuid: str) -> None: try: uuid_object = UUID(uuid, version=4) # The UUID initialization under some circumstances will modify the uuid # string to create a valid UUIDv4, instead of raising a ValueError. # The submitted uuid needing to be modified means it's invalid, so # we need to check for that condition. if str(uuid_object) != uuid: raise ValidationError(err_("Invalid UUID")) except ValueError: raise ValidationError(err_("Invalid UUID")) def validate_bouncer_token_request(token: str, kind: int) -> None: if kind not in [RemotePushDeviceToken.APNS, RemotePushDeviceToken.GCM]: raise JsonableError(err_("Invalid token type")) validate_token(token, kind) @csrf_exempt @require_post @has_request_variables def deactivate_remote_server( request: HttpRequest, remote_server: RemoteZulipServer, ) -> HttpResponse: do_deactivate_remote_server(remote_server) return json_success(request) @csrf_exempt @require_post @has_request_variables def register_remote_server( request: HttpRequest, zulip_org_id: str = REQ(str_validator=check_string_fixed_length(RemoteZulipServer.UUID_LENGTH)), zulip_org_key: str = REQ( str_validator=check_string_fixed_length(RemoteZulipServer.API_KEY_LENGTH) ), hostname: str = REQ(str_validator=check_capped_string(RemoteZulipServer.HOSTNAME_MAX_LENGTH)), contact_email: str = REQ(), new_org_key: Optional[str] = REQ( str_validator=check_string_fixed_length(RemoteZulipServer.API_KEY_LENGTH), default=None ), ) -> HttpResponse: # REQ validated the the field lengths, but we still need to # validate the format of these fields. try: # TODO: Ideally we'd not abuse the URL validator this way url_validator = URLValidator() url_validator("http://" + hostname) except ValidationError: raise JsonableError(_("{hostname} is not a valid hostname").format(hostname=hostname)) try: validate_email(contact_email) except ValidationError as e: raise JsonableError(e.message) try: validate_uuid(zulip_org_id) except ValidationError as e: raise JsonableError(e.message) with transaction.atomic(): remote_server, created = RemoteZulipServer.objects.get_or_create( uuid=zulip_org_id, defaults={ "hostname": hostname, "contact_email": contact_email, "api_key": zulip_org_key, }, ) if created: RemoteZulipServerAuditLog.objects.create( event_type=RemoteZulipServerAuditLog.REMOTE_SERVER_CREATED, server=remote_server, event_time=remote_server.last_updated, ) else: if not constant_time_compare(remote_server.api_key, zulip_org_key): raise InvalidZulipServerKeyError(zulip_org_id) else: remote_server.hostname = hostname remote_server.contact_email = contact_email if new_org_key is not None: remote_server.api_key = new_org_key remote_server.save() return json_success(request, data={"created": created}) @has_request_variables def register_remote_push_device( request: HttpRequest, server: RemoteZulipServer, user_id: Optional[int] = REQ(json_validator=check_int, default=None), user_uuid: Optional[str] = REQ(default=None), realm_uuid: Optional[str] = REQ(default=None), token: str = REQ(), token_kind: int = REQ(json_validator=check_int), ios_app_id: Optional[str] = REQ(str_validator=check_app_id, default=None), ) -> HttpResponse: validate_bouncer_token_request(token, token_kind) if token_kind == RemotePushDeviceToken.APNS and ios_app_id is None: raise JsonableError(_("Missing ios_app_id")) if user_id is None and user_uuid is None: raise JsonableError(_("Missing user_id or user_uuid")) if user_id is not None and user_uuid is not None: kwargs: Dict[str, object] = {"user_uuid": user_uuid, "user_id": None} # Delete pre-existing user_id registration for this user+device to avoid # duplication. Further down, uuid registration will be created. RemotePushDeviceToken.objects.filter( server=server, token=token, kind=token_kind, user_id=user_id ).delete() else: # One of these is None, so these kwargs will lead to a proper registration # of either user_id or user_uuid type kwargs = {"user_id": user_id, "user_uuid": user_uuid} if realm_uuid is not None: # Servers 8.0+ also send the realm.uuid of the user. assert isinstance( user_uuid, str ), "Servers new enough to send realm_uuid, should also have user_uuid" remote_realm = get_remote_realm_helper(request, server, realm_uuid, user_uuid) if remote_realm is not None: # We want to associate the RemotePushDeviceToken with the RemoteRealm. kwargs["remote_realm_id"] = remote_realm.id try: with transaction.atomic(): RemotePushDeviceToken.objects.create( server=server, kind=token_kind, token=token, ios_app_id=ios_app_id, # last_updated is to be renamed to date_created. last_updated=timezone_now(), **kwargs, ) except IntegrityError: pass return json_success(request) @has_request_variables def unregister_remote_push_device( request: HttpRequest, server: RemoteZulipServer, token: str = REQ(), token_kind: int = REQ(json_validator=check_int), user_id: Optional[int] = REQ(json_validator=check_int, default=None), user_uuid: Optional[str] = REQ(default=None), ) -> HttpResponse: validate_bouncer_token_request(token, token_kind) user_identity = UserPushIdentityCompat(user_id=user_id, user_uuid=user_uuid) (num_deleted, ignored) = RemotePushDeviceToken.objects.filter( user_identity.filter_q(), token=token, kind=token_kind, server=server ).delete() if num_deleted == 0: raise JsonableError(err_("Token does not exist")) return json_success(request) @has_request_variables def unregister_all_remote_push_devices( request: HttpRequest, server: RemoteZulipServer, user_id: Optional[int] = REQ(json_validator=check_int, default=None), user_uuid: Optional[str] = REQ(default=None), ) -> HttpResponse: user_identity = UserPushIdentityCompat(user_id=user_id, user_uuid=user_uuid) RemotePushDeviceToken.objects.filter(user_identity.filter_q(), server=server).delete() return json_success(request) def delete_duplicate_registrations( registrations: List[RemotePushDeviceToken], server_id: int, user_id: int, user_uuid: str ) -> List[RemotePushDeviceToken]: """ When migrating to support registration by UUID, we introduced a bug where duplicate registrations for the same device+user could be created - one by user_id and one by user_uuid. Given no good way of detecting these duplicates at database level, we need to take advantage of the fact that when a remote server sends a push notification request to us, it sends both user_id and user_uuid of the user. See https://github.com/zulip/zulip/issues/24969 for reference. This function, knowing the user_id and user_uuid of the user, can detect duplicates and delete the legacy user_id registration if appropriate. Return the list of registrations with the user_id-based duplicates removed. """ # All registrations passed here should be of the same kind (apple vs android). assert len({registration.kind for registration in registrations}) == 1 kind = registrations[0].kind tokens_counter = Counter(device.token for device in registrations) tokens_to_deduplicate = [] for key in tokens_counter: if tokens_counter[key] <= 1: continue if tokens_counter[key] > 2: raise AssertionError( f"More than two registrations for token {key} for user id:{user_id} uuid:{user_uuid}, shouldn't be possible" ) assert tokens_counter[key] == 2 tokens_to_deduplicate.append(key) if not tokens_to_deduplicate: return registrations logger.info( "Deduplicating push registrations for server id:%s user id:%s uuid:%s and tokens:%s", server_id, user_id, user_uuid, sorted(tokens_to_deduplicate), ) RemotePushDeviceToken.objects.filter( token__in=tokens_to_deduplicate, kind=kind, server_id=server_id, user_id=user_id ).delete() deduplicated_registrations_to_return = [] for registration in registrations: if registration.token in tokens_to_deduplicate and registration.user_id is not None: # user_id registrations are the ones we deleted continue deduplicated_registrations_to_return.append(registration) return deduplicated_registrations_to_return class TestNotificationPayload(BaseModel): token: str token_kind: int user_id: int user_uuid: str base_payload: Dict[str, Any] model_config = ConfigDict(extra="forbid") @typed_endpoint def remote_server_send_test_notification( request: HttpRequest, server: RemoteZulipServer, *, payload: JsonBodyPayload[TestNotificationPayload], ) -> HttpResponse: token = payload.token token_kind = payload.token_kind user_id = payload.user_id user_uuid = payload.user_uuid # The remote server only sends the base payload with basic user and server info, # and the actual format of the test notification is defined on the bouncer, as that # gives us the flexibility to modify it freely, without relying on other servers # upgrading. base_payload = payload.base_payload # This is a new endpoint, so it can assume it will only be used by newer # servers that will send user both UUID and ID. user_identity = UserPushIdentityCompat(user_id=user_id, user_uuid=user_uuid) try: device = RemotePushDeviceToken.objects.get( user_identity.filter_q(), token=token, kind=token_kind, server=server ) except RemotePushDeviceToken.DoesNotExist: raise InvalidRemotePushDeviceTokenError send_test_push_notification_directly_to_devices( user_identity, [device], base_payload, remote=server ) return json_success(request) def get_remote_realm_helper( request: HttpRequest, server: RemoteZulipServer, realm_uuid: str, user_uuid: str ) -> Optional[RemoteRealm]: """ Tries to fetch RemoteRealm for the given realm_uuid and server. Otherwise, returns None and logs what happened using request and user_uuid args to make the output more informative. """ try: remote_realm = RemoteRealm.objects.get(uuid=realm_uuid) except RemoteRealm.DoesNotExist: logger.info( "%s: Received request for unknown realm %s, server %s, user %s", request.path, realm_uuid, server.id, user_uuid, ) return None if remote_realm.server_id != server.id: logger.warning( "%s: Realm %s exists, but not registered to server %s", request.path, realm_uuid, server.id, ) return None return remote_realm @has_request_variables def remote_server_notify_push( request: HttpRequest, server: RemoteZulipServer, payload: Dict[str, Any] = REQ(argument_type="body"), ) -> HttpResponse: user_id = payload.get("user_id") user_uuid = payload.get("user_uuid") user_identity = UserPushIdentityCompat(user_id, user_uuid) gcm_payload = payload["gcm_payload"] apns_payload = payload["apns_payload"] gcm_options = payload.get("gcm_options", {}) realm_uuid = payload.get("realm_uuid") remote_realm = None if realm_uuid is not None: assert isinstance( user_uuid, str ), "Servers new enough to send realm_uuid, should also have user_uuid" remote_realm = get_remote_realm_helper(request, server, realm_uuid, user_uuid) android_devices = list( RemotePushDeviceToken.objects.filter( user_identity.filter_q(), kind=RemotePushDeviceToken.GCM, server=server, ) ) if android_devices and user_id is not None and user_uuid is not None: android_devices = delete_duplicate_registrations( android_devices, server.id, user_id, user_uuid ) apple_devices = list( RemotePushDeviceToken.objects.filter( user_identity.filter_q(), kind=RemotePushDeviceToken.APNS, server=server, ) ) if apple_devices and user_id is not None and user_uuid is not None: apple_devices = delete_duplicate_registrations(apple_devices, server.id, user_id, user_uuid) remote_queue_latency: Optional[str] = None sent_time: Optional[Union[float, int]] = gcm_payload.get( # TODO/compatibility: This could be a lot simpler if not for pre-5.0 Zulip servers # that had an older format. Future implementation: # "time", apns_payload["custom"]["zulip"].get("time") "time", apns_payload.get("custom", {}).get("zulip", {}).get("time"), ) if sent_time is not None: if isinstance(sent_time, int): # The 'time' field only used to have whole-integer # granularity, so if so we only report with # whole-second granularity remote_queue_latency = str(int(timezone_now().timestamp()) - sent_time) else: remote_queue_latency = f"{timezone_now().timestamp() - sent_time:.3f}" logger.info( "Remote queuing latency for %s:%s is %s seconds", server.uuid, user_identity, remote_queue_latency, ) logger.info( "Sending mobile push notifications for remote user %s:%s: %s via FCM devices, %s via APNs devices", server.uuid, user_identity, len(android_devices), len(apple_devices), ) do_increment_logging_stat( server, REMOTE_INSTALLATION_COUNT_STATS["mobile_pushes_received::day"], None, timezone_now(), increment=len(android_devices) + len(apple_devices), ) if remote_realm is not None: do_increment_logging_stat( remote_realm, COUNT_STATS["mobile_pushes_received::day"], None, timezone_now(), increment=len(android_devices) + len(apple_devices), ) # Truncate incoming pushes to 200, due to APNs maximum message # sizes; see handle_remove_push_notification for the version of # this for notifications generated natively on the server. We # apply this to remote-server pushes in case they predate that # commit. def truncate_payload(payload: Dict[str, Any]) -> Dict[str, Any]: MAX_MESSAGE_IDS = 200 if payload and payload.get("event") == "remove" and payload.get("zulip_message_ids"): ids = [int(id) for id in payload["zulip_message_ids"].split(",")] truncated_ids = sorted(ids)[-MAX_MESSAGE_IDS:] payload["zulip_message_ids"] = ",".join(str(id) for id in truncated_ids) return payload # The full request must complete within 30s, the timeout set by # Zulip remote hosts for push notification requests (see # PushBouncerSession). The timeouts in the FCM and APNS codepaths # must be set accordingly; see send_android_push_notification and # send_apple_push_notification. gcm_payload = truncate_payload(gcm_payload) android_successfully_delivered = send_android_push_notification( user_identity, android_devices, gcm_payload, gcm_options, remote=server ) if isinstance(apns_payload.get("custom"), dict) and isinstance( apns_payload["custom"].get("zulip"), dict ): apns_payload["custom"]["zulip"] = truncate_payload(apns_payload["custom"]["zulip"]) apple_successfully_delivered = send_apple_push_notification( user_identity, apple_devices, apns_payload, remote=server ) do_increment_logging_stat( server, REMOTE_INSTALLATION_COUNT_STATS["mobile_pushes_forwarded::day"], None, timezone_now(), increment=android_successfully_delivered + apple_successfully_delivered, ) if remote_realm is not None: do_increment_logging_stat( remote_realm, COUNT_STATS["mobile_pushes_forwarded::day"], None, timezone_now(), increment=android_successfully_delivered + apple_successfully_delivered, ) return json_success( request, data={ "total_android_devices": len(android_devices), "total_apple_devices": len(apple_devices), }, ) def validate_incoming_table_data( server: RemoteZulipServer, model: Any, rows: List[Dict[str, Any]], is_count_stat: bool = False ) -> None: last_id = get_last_id_from_server(server, model) for row in rows: if is_count_stat and ( row["property"] not in COUNT_STATS or row["property"] in BOUNCER_ONLY_REMOTE_COUNT_STAT_PROPERTIES ): raise JsonableError(_("Invalid property {property}").format(property=row["property"])) if row.get("id") is None: # This shouldn't be possible, as submitting data like this should be # prevented by our param validators. raise AssertionError(f"Missing id field in row {row}") if row["id"] <= last_id: raise JsonableError(_("Data is out of order.")) last_id = row["id"] ModelT = TypeVar("ModelT", bound=Model) def batch_create_table_data( server: RemoteZulipServer, model: Type[ModelT], row_objects: List[ModelT], ) -> None: # We ignore previously-existing data, in case it was truncated and # re-created on the remote server. `ignore_concflicts=True` # cannot return the ids, or count thereof, of the new inserts, # (see https://code.djangoproject.com/ticket/0138) so we rely on # having a lock to accurately count them before and after. This # query is also well-indexed. before_count = model._default_manager.filter(server=server).count() model._default_manager.bulk_create(row_objects, batch_size=1000, ignore_conflicts=True) after_count = model._default_manager.filter(server=server).count() inserted_count = after_count - before_count if inserted_count < len(row_objects): logging.warning( "Dropped %d duplicated rows while saving %d rows of %s for server %s/%s", len(row_objects) - inserted_count, len(row_objects), model._meta.db_table, server.hostname, server.uuid, ) def update_remote_realm_data_for_server( server: RemoteZulipServer, server_realms_info: List[RealmDataForAnalytics] ) -> None: uuids = [realm.uuid for realm in server_realms_info] already_registered_remote_realms = RemoteRealm.objects.filter(uuid__in=uuids, server=server) already_registered_uuids = { remote_realm.uuid for remote_realm in already_registered_remote_realms } new_remote_realms = [ RemoteRealm( server=server, uuid=realm.uuid, uuid_owner_secret=realm.uuid_owner_secret, host=realm.host, realm_deactivated=realm.deactivated, realm_date_created=timestamp_to_datetime(realm.date_created), org_type=realm.org_type, name=realm.name, authentication_methods=realm.authentication_methods, ) for realm in server_realms_info if realm.uuid not in already_registered_uuids ] try: RemoteRealm.objects.bulk_create(new_remote_realms) except IntegrityError: raise JsonableError(_("Duplicate registration detected.")) uuid_to_realm_dict = {str(realm.uuid): realm for realm in server_realms_info} remote_realms_to_update = [] remote_realm_audit_logs = [] now = timezone_now() # Update RemoteRealm entries, for which the corresponding realm's info has changed # (for the attributes that make sense to sync like this). for remote_realm in already_registered_remote_realms: modified = False realm = uuid_to_realm_dict[str(remote_realm.uuid)] for remote_realm_attr, realm_dict_key in [ ("host", "host"), ("org_type", "org_type"), ("name", "name"), ("authentication_methods", "authentication_methods"), ("realm_deactivated", "deactivated"), ]: old_value = getattr(remote_realm, remote_realm_attr) new_value = getattr(realm, realm_dict_key) if old_value == new_value: continue setattr(remote_realm, remote_realm_attr, new_value) remote_realm_audit_logs.append( RemoteRealmAuditLog( server=server, remote_id=None, remote_realm=remote_realm, realm_id=realm.id, event_type=RemoteRealmAuditLog.REMOTE_REALM_VALUE_UPDATED, event_time=now, extra_data={ "attr_name": remote_realm_attr, "old_value": old_value, "new_value": new_value, }, ) ) modified = True if modified: remote_realms_to_update.append(remote_realm) RemoteRealm.objects.bulk_update( remote_realms_to_update, ["host", "realm_deactivated", "name", "authentication_methods", "org_type"], ) RemoteRealmAuditLog.objects.bulk_create(remote_realm_audit_logs) class RealmAuditLogDataForAnalytics(BaseModel): id: int realm: int event_time: float backfilled: bool extra_data: Optional[Union[str, Dict[str, Any]]] event_type: int class RealmCountDataForAnalytics(BaseModel): property: str realm: int id: int end_time: float subgroup: Optional[str] value: int class InstallationCountDataForAnalytics(BaseModel): property: str id: int end_time: float subgroup: Optional[str] value: int @typed_endpoint @transaction.atomic def remote_server_post_analytics( request: HttpRequest, server: RemoteZulipServer, *, realm_counts: Json[List[RealmCountDataForAnalytics]], installation_counts: Json[List[InstallationCountDataForAnalytics]], realmauditlog_rows: Optional[Json[List[RealmAuditLogDataForAnalytics]]] = None, realms: Optional[Json[List[RealmDataForAnalytics]]] = None, version: Optional[Json[str]] = None, ) -> HttpResponse: # Lock the server, preventing this from racing with other # duplicate submissions of the data server = RemoteZulipServer.objects.select_for_update().get(id=server.id) if version is not None: version = version[0 : RemoteZulipServer.VERSION_MAX_LENGTH] if version != server.last_version: server.last_version = version server.save(update_fields=["last_version"]) validate_incoming_table_data( server, RemoteRealmCount, [dict(count) for count in realm_counts], True ) validate_incoming_table_data( server, RemoteInstallationCount, [dict(count) for count in installation_counts], True ) if realmauditlog_rows is not None: validate_incoming_table_data( server, RemoteRealmAuditLog, [dict(row) for row in realmauditlog_rows] ) if realms is not None: update_remote_realm_data_for_server(server, realms) remote_realm_counts = [ RemoteRealmCount( property=row.property, realm_id=row.realm, remote_id=row.id, server=server, end_time=datetime.datetime.fromtimestamp(row.end_time, tz=datetime.timezone.utc), subgroup=row.subgroup, value=row.value, ) for row in realm_counts ] batch_create_table_data(server, RemoteRealmCount, remote_realm_counts) remote_installation_counts = [ RemoteInstallationCount( property=row.property, remote_id=row.id, server=server, end_time=datetime.datetime.fromtimestamp(row.end_time, tz=datetime.timezone.utc), subgroup=row.subgroup, value=row.value, ) for row in installation_counts ] batch_create_table_data(server, RemoteInstallationCount, remote_installation_counts) if realmauditlog_rows is not None: remote_realm_audit_logs = [] for row in realmauditlog_rows: extra_data = {} if isinstance(row.extra_data, str): try: extra_data = orjson.loads(row.extra_data) except orjson.JSONDecodeError: raise JsonableError(_("Malformed audit log data")) elif row.extra_data is not None: assert isinstance(row.extra_data, dict) extra_data = row.extra_data remote_realm_audit_logs.append( RemoteRealmAuditLog( realm_id=row.realm, remote_id=row.id, server=server, event_time=datetime.datetime.fromtimestamp( row.event_time, tz=datetime.timezone.utc ), backfilled=row.backfilled, extra_data=extra_data, event_type=row.event_type, ) ) batch_create_table_data(server, RemoteRealmAuditLog, remote_realm_audit_logs) return json_success(request) def get_last_id_from_server(server: RemoteZulipServer, model: Any) -> int: last_count = ( model.objects.filter(server=server) # Rows with remote_id=None are managed by the bouncer service itself, # and thus aren't meant for syncing and should be ignored here. .exclude(remote_id=None) .order_by("remote_id") .only("remote_id") .last() ) if last_count is not None: return last_count.remote_id return 0 @has_request_variables def remote_server_check_analytics(request: HttpRequest, server: RemoteZulipServer) -> HttpResponse: result = { "last_realm_count_id": get_last_id_from_server(server, RemoteRealmCount), "last_installation_count_id": get_last_id_from_server(server, RemoteInstallationCount), "last_realmauditlog_id": get_last_id_from_server(server, RemoteRealmAuditLog), } return json_success(request, data=result)