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Email clients tend to sort emails by the "Date" header, which is not when the email was received -- emails can be arbitrarily delayed during relaying. Messages without a Date header (as all Zulip messages previously) have one inserted by the first mailserver they encounter. As there are now multiple email-sending queues, we would like the view of the database, as presented by the emails that are sent out, to be consistent based on the Date header, which may not be the same as when the client gets the email in their inbox. Insert a Date header of when the Zulip system inserted the data into the local queue, as that encodes when the full information was pulled from the database. This also opens the door to multiple workers servicing the email_senders queue, to limit backlogging during large notifications, without having to worry about inconsistent delivery order between those two workers. Messages which are sent synchronously via `send_email()` get a Date header of when we attempt to send the message; this is, in practice, no different from Django's default behaviour of doing so, but makes the behaviour slightly more consistent.
126 lines
4.8 KiB
Python
126 lines
4.8 KiB
Python
import zoneinfo
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from typing import Any
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from django.conf import settings
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from django.contrib.auth.signals import user_logged_in, user_logged_out
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from django.dispatch import receiver
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from django.utils.timezone import get_current_timezone_name as timezone_get_current_timezone_name
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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 confirmation.models import one_click_unsubscribe_link
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from zerver.lib.queue import queue_json_publish_rollback_unsafe
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from zerver.lib.send_email import EMAIL_DATE_FORMAT, FromAddress
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from zerver.lib.timezone import canonicalize_timezone
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from zerver.models import UserProfile
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JUST_CREATED_THRESHOLD = 60
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def get_device_browser(user_agent: str) -> str | None:
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user_agent = user_agent.lower()
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if "zulip" in user_agent:
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return "Zulip"
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elif "edge" in user_agent:
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return "Edge"
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elif "opera" in user_agent or "opr/" in user_agent:
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return "Opera"
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elif ("chrome" in user_agent or "crios" in user_agent) and "chromium" not in user_agent:
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return "Chrome"
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elif "firefox" in user_agent and "seamonkey" not in user_agent and "chrome" not in user_agent:
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return "Firefox"
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elif "chromium" in user_agent:
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return "Chromium"
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elif "safari" in user_agent and "chrome" not in user_agent and "chromium" not in user_agent:
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return "Safari"
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elif "msie" in user_agent or "trident" in user_agent:
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return "Internet Explorer"
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else:
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return None
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def get_device_os(user_agent: str) -> str | None:
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user_agent = user_agent.lower()
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if "windows" in user_agent:
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return "Windows"
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elif "macintosh" in user_agent:
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return "macOS"
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elif "linux" in user_agent and "android" not in user_agent:
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return "Linux"
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elif "android" in user_agent:
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return "Android"
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elif "ios" in user_agent:
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return "iOS"
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elif "like mac os x" in user_agent:
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return "iOS"
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elif " cros " in user_agent:
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return "ChromeOS"
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else:
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return None
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@receiver(user_logged_in, dispatch_uid="only_on_login")
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def email_on_new_login(sender: Any, user: UserProfile, request: Any, **kwargs: Any) -> None:
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if not user.enable_login_emails:
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return
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if user.delivery_email == "":
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# Do not attempt to send new login emails for users without an email address.
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# The assertions here are to help document the only circumstance under which
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# this condition should be possible.
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assert (
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user.realm.demo_organization_scheduled_deletion_date is not None and user.is_realm_owner
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)
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return
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# We import here to minimize the dependencies of this module,
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# since it runs as part of `manage.py` initialization
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from zerver.context_processors import common_context
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if not settings.SEND_LOGIN_EMAILS:
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return
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if request:
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# If the user's account was just created, avoid sending an email.
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if (timezone_now() - user.date_joined).total_seconds() <= JUST_CREATED_THRESHOLD:
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return
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user_agent = request.headers.get("User-Agent", "").lower()
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context = common_context(user)
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context["user_email"] = user.delivery_email
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user_tz = user.timezone
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if user_tz == "":
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user_tz = timezone_get_current_timezone_name()
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local_time = timezone_now().astimezone(zoneinfo.ZoneInfo(canonicalize_timezone(user_tz)))
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if user.twenty_four_hour_time:
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hhmm_string = local_time.strftime("%H:%M")
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else:
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hhmm_string = local_time.strftime("%I:%M %p")
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context["login_time"] = local_time.strftime(f"%A, %B %d, %Y at {hhmm_string} %Z")
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context["device_ip"] = request.META.get("REMOTE_ADDR") or _("Unknown IP address")
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context["device_os"] = get_device_os(user_agent) or _("an unknown operating system")
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context["device_browser"] = get_device_browser(user_agent) or _("An unknown browser")
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context["unsubscribe_link"] = one_click_unsubscribe_link(user, "login")
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email_dict = {
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"template_prefix": "zerver/emails/notify_new_login",
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"to_user_ids": [user.id],
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"from_name": FromAddress.security_email_from_name(user_profile=user),
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"from_address": FromAddress.NOREPLY,
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"context": context,
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"date": local_time.strftime(EMAIL_DATE_FORMAT),
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}
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queue_json_publish_rollback_unsafe("email_senders", email_dict)
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@receiver(user_logged_out)
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def clear_zoom_token_on_logout(
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sender: object, *, user: UserProfile | None, **kwargs: object
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) -> None:
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# Loaded lazily so django.setup() succeeds before static asset generation
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from zerver.actions.video_calls import do_set_zoom_token
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if user is not None and user.zoom_token is not None:
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do_set_zoom_token(user, None)
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