import logging import urllib from typing import Any, Dict, List, Mapping, Tuple, Union import requests import ujson from django.conf import settings from django.forms.models import model_to_dict from django.utils.translation import ugettext as _ from analytics.models import InstallationCount, RealmCount from version import ZULIP_VERSION from zerver.lib.exceptions import JsonableError from zerver.lib.export import floatify_datetime_fields from zerver.models import RealmAuditLog class PushNotificationBouncerException(Exception): pass class PushNotificationBouncerRetryLaterError(JsonableError): http_status_code = 502 def send_to_push_bouncer(method: str, endpoint: str, post_data: Union[str, Dict[str, Any]], extra_headers: Mapping[str, Any] = {}) -> Dict[str, Any]: """While it does actually send the notice, this function has a lot of code and comments around error handling for the push notifications bouncer. There are several classes of failures, each with its own potential solution: * Network errors with requests.request. We raise an exception to signal it to the callers. * 500 errors from the push bouncer or other unexpected responses; we don't try to parse the response, but do make clear the cause. * 400 errors from the push bouncer. Here there are 2 categories: Our server failed to connect to the push bouncer (should throw) vs. client-side errors like and invalid token. """ url = urllib.parse.urljoin(settings.PUSH_NOTIFICATION_BOUNCER_URL, '/api/v1/remotes/' + endpoint) api_auth = requests.auth.HTTPBasicAuth(settings.ZULIP_ORG_ID, settings.ZULIP_ORG_KEY) headers = {"User-agent": f"ZulipServer/{ZULIP_VERSION}"} headers.update(extra_headers) try: res = requests.request(method, url, data=post_data, auth=api_auth, timeout=30, verify=True, headers=headers) except (requests.exceptions.Timeout, requests.exceptions.SSLError, requests.exceptions.ConnectionError) as e: raise PushNotificationBouncerRetryLaterError( f"{e.__class__.__name__} while trying to connect to push notification bouncer") if res.status_code >= 500: # 500s should be resolved by the people who run the push # notification bouncer service, and they'll get an appropriate # error notification from the server. We raise an exception to signal # to the callers that the attempt failed and they can retry. error_msg = "Received 500 from push notification bouncer" logging.warning(error_msg) raise PushNotificationBouncerRetryLaterError(error_msg) elif res.status_code >= 400: # If JSON parsing errors, just let that exception happen result_dict = ujson.loads(res.content) msg = result_dict['msg'] if 'code' in result_dict and result_dict['code'] == 'INVALID_ZULIP_SERVER': # Invalid Zulip server credentials should email this server's admins raise PushNotificationBouncerException( _("Push notifications bouncer error: {}").format(msg)) else: # But most other errors coming from the push bouncer # server are client errors (e.g. never-registered token) # and should be handled as such. raise JsonableError(msg) elif res.status_code != 200: # Anything else is unexpected and likely suggests a bug in # this version of Zulip, so we throw an exception that will # email the server admins. raise PushNotificationBouncerException( f"Push notification bouncer returned unexpected status code {res.status_code}") # If we don't throw an exception, it's a successful bounce! return ujson.loads(res.content) def send_json_to_push_bouncer(method: str, endpoint: str, post_data: Dict[str, Any]) -> None: send_to_push_bouncer( method, endpoint, ujson.dumps(post_data), extra_headers={"Content-type": "application/json"}, ) REALMAUDITLOG_PUSHED_FIELDS = ['id', 'realm', 'event_time', 'backfilled', 'extra_data', 'event_type'] def build_analytics_data(realm_count_query: Any, installation_count_query: Any, realmauditlog_query: Any) -> Tuple[List[Dict[str, Any]], List[Dict[str, Any]], List[Dict[str, Any]]]: # We limit the batch size on the client side to avoid OOM kills timeouts, etc. MAX_CLIENT_BATCH_SIZE = 10000 data = {} data['analytics_realmcount'] = [ model_to_dict(row) for row in realm_count_query.order_by("id")[0:MAX_CLIENT_BATCH_SIZE] ] data['analytics_installationcount'] = [ model_to_dict(row) for row in installation_count_query.order_by("id")[0:MAX_CLIENT_BATCH_SIZE] ] data['zerver_realmauditlog'] = [ model_to_dict(row, fields=REALMAUDITLOG_PUSHED_FIELDS) for row in realmauditlog_query.order_by("id")[0:MAX_CLIENT_BATCH_SIZE] ] floatify_datetime_fields(data, 'analytics_realmcount') floatify_datetime_fields(data, 'analytics_installationcount') floatify_datetime_fields(data, 'zerver_realmauditlog') return (data['analytics_realmcount'], data['analytics_installationcount'], data['zerver_realmauditlog']) def send_analytics_to_remote_server() -> None: # first, check what's latest try: result = send_to_push_bouncer("GET", "server/analytics/status", {}) except PushNotificationBouncerRetryLaterError as e: logging.warning(e.msg) return last_acked_realm_count_id = result['last_realm_count_id'] last_acked_installation_count_id = result['last_installation_count_id'] last_acked_realmauditlog_id = result['last_realmauditlog_id'] (realm_count_data, installation_count_data, realmauditlog_data) = build_analytics_data( realm_count_query=RealmCount.objects.filter( id__gt=last_acked_realm_count_id), installation_count_query=InstallationCount.objects.filter( id__gt=last_acked_installation_count_id), realmauditlog_query=RealmAuditLog.objects.filter( event_type__in=RealmAuditLog.SYNCED_BILLING_EVENTS, id__gt=last_acked_realmauditlog_id)) if len(realm_count_data) + len(installation_count_data) + len(realmauditlog_data) == 0: return request = { 'realm_counts': ujson.dumps(realm_count_data), 'installation_counts': ujson.dumps(installation_count_data), 'realmauditlog_rows': ujson.dumps(realmauditlog_data), 'version': ujson.dumps(ZULIP_VERSION), } # Gather only entries with an ID greater than last_realm_count_id try: send_to_push_bouncer("POST", "server/analytics", request) except JsonableError as e: logging.warning(e.msg)