synapse-product/synapse/push/mailer.py

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# -*- coding: utf-8 -*-
# Copyright 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import email.mime.multipart
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import email.utils
import logging
import time
import urllib
from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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from typing import Iterable, List, TypeVar
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import bleach
import jinja2
from synapse.api.constants import EventTypes
from synapse.api.errors import StoreError
from synapse.config.emailconfig import EmailSubjectConfig
from synapse.logging.context import make_deferred_yieldable
from synapse.push.presentable_names import (
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calculate_room_name,
descriptor_from_member_events,
name_from_member_event,
)
from synapse.types import UserID
from synapse.util.async_helpers import concurrently_execute
from synapse.visibility import filter_events_for_client
logger = logging.getLogger(__name__)
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T = TypeVar("T")
CONTEXT_BEFORE = 1
CONTEXT_AFTER = 1
# From https://github.com/matrix-org/matrix-react-sdk/blob/master/src/HtmlUtils.js
ALLOWED_TAGS = [
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"font", # custom to matrix for IRC-style font coloring
"del", # for markdown
# deliberately no h1/h2 to stop people shouting.
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"h3",
"h4",
"h5",
"h6",
"blockquote",
"p",
"a",
"ul",
"ol",
"nl",
"li",
"b",
"i",
"u",
"strong",
"em",
"strike",
"code",
"hr",
"br",
"div",
"table",
"thead",
"caption",
"tbody",
"tr",
"th",
"td",
"pre",
]
ALLOWED_ATTRS = {
# custom ones first:
"font": ["color"], # custom to matrix
"a": ["href", "name", "target"], # remote target: custom to matrix
# We don't currently allow img itself by default, but this
# would make sense if we did
"img": ["src"],
}
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# When bleach release a version with this option, we can specify schemes
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# ALLOWED_SCHEMES = ["http", "https", "ftp", "mailto"]
class Mailer(object):
def __init__(self, hs, app_name, template_html, template_text):
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self.hs = hs
self.template_html = template_html
self.template_text = template_text
self.sendmail = self.hs.get_sendmail()
self.store = self.hs.get_datastore()
self.macaroon_gen = self.hs.get_macaroon_generator()
self.state_handler = self.hs.get_state_handler()
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self.storage = hs.get_storage()
self.app_name = app_name
self.email_subjects = hs.config.email_subjects # type: EmailSubjectConfig
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logger.info("Created Mailer for app_name %s" % app_name)
async def send_password_reset_mail(self, email_address, token, client_secret, sid):
"""Send an email with a password reset link to a user
Args:
email_address (str): Email address we're sending the password
reset to
token (str): Unique token generated by the server to verify
the email was received
client_secret (str): Unique token generated by the client to
group together multiple email sending attempts
sid (str): The generated session ID
"""
params = {"token": token, "client_secret": client_secret, "sid": sid}
link = (
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self.hs.config.public_baseurl
+ "_matrix/client/unstable/password_reset/email/submit_token?%s"
% urllib.parse.urlencode(params)
)
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template_vars = {"link": link}
await self.send_email(
email_address,
self.email_subjects.password_reset
% {"server_name": self.hs.config.server_name},
template_vars,
)
async def send_registration_mail(self, email_address, token, client_secret, sid):
"""Send an email with a registration confirmation link to a user
Args:
email_address (str): Email address we're sending the registration
link to
token (str): Unique token generated by the server to verify
the email was received
client_secret (str): Unique token generated by the client to
group together multiple email sending attempts
sid (str): The generated session ID
"""
params = {"token": token, "client_secret": client_secret, "sid": sid}
link = (
self.hs.config.public_baseurl
+ "_matrix/client/unstable/registration/email/submit_token?%s"
% urllib.parse.urlencode(params)
)
template_vars = {"link": link}
await self.send_email(
email_address,
self.email_subjects.email_validation
% {"server_name": self.hs.config.server_name},
template_vars,
)
async def send_add_threepid_mail(self, email_address, token, client_secret, sid):
"""Send an email with a validation link to a user for adding a 3pid to their account
Args:
email_address (str): Email address we're sending the validation link to
token (str): Unique token generated by the server to verify the email was received
client_secret (str): Unique token generated by the client to group together
multiple email sending attempts
sid (str): The generated session ID
"""
params = {"token": token, "client_secret": client_secret, "sid": sid}
link = (
self.hs.config.public_baseurl
+ "_matrix/client/unstable/add_threepid/email/submit_token?%s"
% urllib.parse.urlencode(params)
)
template_vars = {"link": link}
await self.send_email(
email_address,
self.email_subjects.email_validation
% {"server_name": self.hs.config.server_name},
template_vars,
)
async def send_notification_mail(
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self, app_id, user_id, email_address, push_actions, reason
):
"""Send email regarding a user's room notifications"""
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rooms_in_order = deduped_ordered_list([pa["room_id"] for pa in push_actions])
notif_events = await self.store.get_events(
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[pa["event_id"] for pa in push_actions]
)
notifs_by_room = {}
for pa in push_actions:
notifs_by_room.setdefault(pa["room_id"], []).append(pa)
# collect the current state for all the rooms in which we have
# notifications
state_by_room = {}
try:
user_display_name = await self.store.get_profile_displayname(
UserID.from_string(user_id).localpart
)
if user_display_name is None:
user_display_name = user_id
except StoreError:
user_display_name = user_id
async def _fetch_room_state(room_id):
room_state = await self.store.get_current_state_ids(room_id)
state_by_room[room_id] = room_state
# Run at most 3 of these at once: sync does 10 at a time but email
# notifs are much less realtime than sync so we can afford to wait a bit.
await concurrently_execute(_fetch_room_state, rooms_in_order, 3)
# actually sort our so-called rooms_in_order list, most recent room first
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rooms_in_order.sort(key=lambda r: -(notifs_by_room[r][-1]["received_ts"] or 0))
rooms = []
for r in rooms_in_order:
roomvars = await self.get_room_vars(
r, user_id, notifs_by_room[r], notif_events, state_by_room[r]
)
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rooms.append(roomvars)
reason["room_name"] = await calculate_room_name(
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self.store,
state_by_room[reason["room_id"]],
user_id,
fallback_to_members=True,
)
summary_text = await self.make_summary_text(
notifs_by_room, state_by_room, notif_events, user_id, reason
)
template_vars = {
"user_display_name": user_display_name,
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"unsubscribe_link": self.make_unsubscribe_link(
user_id, app_id, email_address
),
"summary_text": summary_text,
"rooms": rooms,
"reason": reason,
}
await self.send_email(email_address, summary_text, template_vars)
async def send_email(self, email_address, subject, extra_template_vars):
"""Send an email with the given information and template text"""
try:
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from_string = self.hs.config.email_notif_from % {"app": self.app_name}
except TypeError:
from_string = self.hs.config.email_notif_from
raw_from = email.utils.parseaddr(from_string)[1]
raw_to = email.utils.parseaddr(email_address)[1]
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if raw_to == "":
raise RuntimeError("Invalid 'to' address")
template_vars = {
"app_name": self.app_name,
"server_name": self.hs.config.server.server_name,
}
template_vars.update(extra_template_vars)
html_text = self.template_html.render(**template_vars)
html_part = MIMEText(html_text, "html", "utf8")
plain_text = self.template_text.render(**template_vars)
text_part = MIMEText(plain_text, "plain", "utf8")
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multipart_msg = MIMEMultipart("alternative")
multipart_msg["Subject"] = subject
multipart_msg["From"] = from_string
multipart_msg["To"] = email_address
multipart_msg["Date"] = email.utils.formatdate()
multipart_msg["Message-ID"] = email.utils.make_msgid()
multipart_msg.attach(text_part)
multipart_msg.attach(html_part)
logger.info("Sending email to %s" % email_address)
await make_deferred_yieldable(
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self.sendmail(
self.hs.config.email_smtp_host,
raw_from,
raw_to,
multipart_msg.as_string().encode("utf8"),
reactor=self.hs.get_reactor(),
port=self.hs.config.email_smtp_port,
requireAuthentication=self.hs.config.email_smtp_user is not None,
username=self.hs.config.email_smtp_user,
password=self.hs.config.email_smtp_pass,
requireTransportSecurity=self.hs.config.require_transport_security,
)
)
async def get_room_vars(
self, room_id, user_id, notifs, notif_events, room_state_ids
):
my_member_event_id = room_state_ids[("m.room.member", user_id)]
my_member_event = await self.store.get_event(my_member_event_id)
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is_invite = my_member_event.content["membership"] == "invite"
room_name = await calculate_room_name(self.store, room_state_ids, user_id)
room_vars = {
"title": room_name,
"hash": string_ordinal_total(room_id), # See sender avatar hash
"notifs": [],
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"invite": is_invite,
"link": self.make_room_link(room_id),
}
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if not is_invite:
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for n in notifs:
notifvars = await self.get_notif_vars(
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n, user_id, notif_events[n["event_id"]], room_state_ids
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)
# merge overlapping notifs together.
# relies on the notifs being in chronological order.
merge = False
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if room_vars["notifs"] and "messages" in room_vars["notifs"][-1]:
prev_messages = room_vars["notifs"][-1]["messages"]
for message in notifvars["messages"]:
pm = list(
filter(lambda pm: pm["id"] == message["id"], prev_messages)
)
if pm:
if not message["is_historical"]:
pm[0]["is_historical"] = False
merge = True
elif merge:
# we're merging, so append any remaining messages
# in this notif to the previous one
prev_messages.append(message)
if not merge:
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room_vars["notifs"].append(notifvars)
return room_vars
async def get_notif_vars(self, notif, user_id, notif_event, room_state_ids):
results = await self.store.get_events_around(
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notif["room_id"],
notif["event_id"],
before_limit=CONTEXT_BEFORE,
after_limit=CONTEXT_AFTER,
)
ret = {
"link": self.make_notif_link(notif),
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"ts": notif["received_ts"],
"messages": [],
}
the_events = await filter_events_for_client(
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self.storage, user_id, results["events_before"]
)
the_events.append(notif_event)
for event in the_events:
messagevars = await self.get_message_vars(notif, event, room_state_ids)
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if messagevars is not None:
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ret["messages"].append(messagevars)
return ret
async def get_message_vars(self, notif, event, room_state_ids):
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if event.type != EventTypes.Message:
return
sender_state_event_id = room_state_ids[("m.room.member", event.sender)]
sender_state_event = await self.store.get_event(sender_state_event_id)
sender_name = name_from_member_event(sender_state_event)
sender_avatar_url = sender_state_event.content.get("avatar_url")
# 'hash' for deterministically picking default images: use
# sender_hash % the number of default images to choose from
sender_hash = string_ordinal_total(event.sender)
msgtype = event.content.get("msgtype")
ret = {
"msgtype": msgtype,
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"is_historical": event.event_id != notif["event_id"],
"id": event.event_id,
"ts": event.origin_server_ts,
"sender_name": sender_name,
"sender_avatar_url": sender_avatar_url,
"sender_hash": sender_hash,
}
if msgtype == "m.text":
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self.add_text_message_vars(ret, event)
elif msgtype == "m.image":
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self.add_image_message_vars(ret, event)
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if "body" in event.content:
ret["body_text_plain"] = event.content["body"]
return ret
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def add_text_message_vars(self, messagevars, event):
msgformat = event.content.get("format")
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messagevars["format"] = msgformat
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formatted_body = event.content.get("formatted_body")
body = event.content.get("body")
if msgformat == "org.matrix.custom.html" and formatted_body:
messagevars["body_text_html"] = safe_markup(formatted_body)
elif body:
messagevars["body_text_html"] = safe_text(body)
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return messagevars
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def add_image_message_vars(self, messagevars, event):
messagevars["image_url"] = event.content["url"]
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return messagevars
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async def make_summary_text(
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self, notifs_by_room, room_state_ids, notif_events, user_id, reason
):
if len(notifs_by_room) == 1:
# Only one room has new stuff
room_id = list(notifs_by_room.keys())[0]
# If the room has some kind of name, use it, but we don't
# want the generated-from-names one here otherwise we'll
# end up with, "new message from Bob in the Bob room"
room_name = await calculate_room_name(
self.store, room_state_ids[room_id], user_id, fallback_to_members=False
)
my_member_event_id = room_state_ids[room_id][("m.room.member", user_id)]
my_member_event = await self.store.get_event(my_member_event_id)
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if my_member_event.content["membership"] == "invite":
inviter_member_event_id = room_state_ids[room_id][
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("m.room.member", my_member_event.sender)
]
inviter_member_event = await self.store.get_event(
inviter_member_event_id
)
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inviter_name = name_from_member_event(inviter_member_event)
if room_name is None:
return self.email_subjects.invite_from_person % {
"person": inviter_name,
"app": self.app_name,
}
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else:
return self.email_subjects.invite_from_person_to_room % {
"person": inviter_name,
"room": room_name,
"app": self.app_name,
}
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sender_name = None
if len(notifs_by_room[room_id]) == 1:
# There is just the one notification, so give some detail
event = notif_events[notifs_by_room[room_id][0]["event_id"]]
if ("m.room.member", event.sender) in room_state_ids[room_id]:
state_event_id = room_state_ids[room_id][
("m.room.member", event.sender)
]
state_event = await self.store.get_event(state_event_id)
sender_name = name_from_member_event(state_event)
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if sender_name is not None and room_name is not None:
return self.email_subjects.message_from_person_in_room % {
"person": sender_name,
"room": room_name,
"app": self.app_name,
}
elif sender_name is not None:
return self.email_subjects.message_from_person % {
"person": sender_name,
"app": self.app_name,
}
else:
# There's more than one notification for this room, so just
# say there are several
if room_name is not None:
return self.email_subjects.messages_in_room % {
"room": room_name,
"app": self.app_name,
}
else:
# If the room doesn't have a name, say who the messages
# are from explicitly to avoid, "messages in the Bob room"
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sender_ids = list(
{
notif_events[n["event_id"]].sender
for n in notifs_by_room[room_id]
}
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)
member_events = await self.store.get_events(
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[
room_state_ids[room_id][("m.room.member", s)]
for s in sender_ids
]
)
return self.email_subjects.messages_from_person % {
"person": descriptor_from_member_events(member_events.values()),
"app": self.app_name,
}
else:
# Stuff's happened in multiple different rooms
# ...but we still refer to the 'reason' room which triggered the mail
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if reason["room_name"] is not None:
return self.email_subjects.messages_in_room_and_others % {
"room": reason["room_name"],
"app": self.app_name,
}
else:
# If the reason room doesn't have a name, say who the messages
# are from explicitly to avoid, "messages in the Bob room"
room_id = reason["room_id"]
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sender_ids = list(
{
notif_events[n["event_id"]].sender
for n in notifs_by_room[room_id]
}
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)
member_events = await self.store.get_events(
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[room_state_ids[room_id][("m.room.member", s)] for s in sender_ids]
)
return self.email_subjects.messages_from_person_and_others % {
"person": descriptor_from_member_events(member_events.values()),
"app": self.app_name,
}
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def make_room_link(self, room_id):
if self.hs.config.email_riot_base_url:
base_url = "%s/#/room" % (self.hs.config.email_riot_base_url)
elif self.app_name == "Vector":
# need /beta for Universal Links to work on iOS
base_url = "https://vector.im/beta/#/room"
else:
base_url = "https://matrix.to/#"
return "%s/%s" % (base_url, room_id)
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def make_notif_link(self, notif):
if self.hs.config.email_riot_base_url:
return "%s/#/room/%s/%s" % (
self.hs.config.email_riot_base_url,
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notif["room_id"],
notif["event_id"],
)
elif self.app_name == "Vector":
# need /beta for Universal Links to work on iOS
return "https://vector.im/beta/#/room/%s/%s" % (
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notif["room_id"],
notif["event_id"],
)
else:
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return "https://matrix.to/#/%s/%s" % (notif["room_id"], notif["event_id"])
def make_unsubscribe_link(self, user_id, app_id, email_address):
params = {
"access_token": self.macaroon_gen.generate_delete_pusher_token(user_id),
"app_id": app_id,
"pushkey": email_address,
}
# XXX: make r0 once API is stable
return "%s_matrix/client/unstable/pushers/remove?%s" % (
self.hs.config.public_baseurl,
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urllib.parse.urlencode(params),
)
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def safe_markup(raw_html):
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return jinja2.Markup(
bleach.linkify(
bleach.clean(
raw_html,
tags=ALLOWED_TAGS,
attributes=ALLOWED_ATTRS,
# bleach master has this, but it isn't released yet
# protocols=ALLOWED_SCHEMES,
strip=True,
)
)
)
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def safe_text(raw_text):
"""
Process text: treat it as HTML but escape any tags (ie. just escape the
HTML) then linkify it.
"""
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return jinja2.Markup(
bleach.linkify(bleach.clean(raw_text, tags=[], attributes={}, strip=False))
)
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def deduped_ordered_list(it: Iterable[T]) -> List[T]:
seen = set()
ret = []
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for item in it:
if item not in seen:
seen.add(item)
ret.append(item)
return ret
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def string_ordinal_total(s):
tot = 0
for c in s:
tot += ord(c)
return tot
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def format_ts_filter(value, format):
return time.strftime(format, time.localtime(value / 1000))
def load_jinja2_templates(
template_dir,
template_filenames,
apply_format_ts_filter=False,
apply_mxc_to_http_filter=False,
public_baseurl=None,
):
"""Loads and returns one or more jinja2 templates and applies optional filters
Args:
template_dir (str): The directory where templates are stored
template_filenames (list[str]): A list of template filenames
apply_format_ts_filter (bool): Whether to apply a template filter that formats
timestamps
apply_mxc_to_http_filter (bool): Whether to apply a template filter that converts
mxc urls to http urls
public_baseurl (str|None): The public baseurl of the server. Required for
apply_mxc_to_http_filter to be enabled
Returns:
A list of jinja2 templates corresponding to the given list of filenames,
with order preserved
"""
logger.info(
"loading email templates %s from '%s'", template_filenames, template_dir
)
loader = jinja2.FileSystemLoader(template_dir)
env = jinja2.Environment(loader=loader)
if apply_format_ts_filter:
env.filters["format_ts"] = format_ts_filter
if apply_mxc_to_http_filter and public_baseurl:
env.filters["mxc_to_http"] = _create_mxc_to_http_filter(public_baseurl)
templates = []
for template_filename in template_filenames:
template = env.get_template(template_filename)
templates.append(template)
return templates
def _create_mxc_to_http_filter(public_baseurl):
def mxc_to_http_filter(value, width, height, resize_method="crop"):
if value[0:6] != "mxc://":
return ""
serverAndMediaId = value[6:]
fragment = None
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if "#" in serverAndMediaId:
(serverAndMediaId, fragment) = serverAndMediaId.split("#", 1)
fragment = "#" + fragment
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params = {"width": width, "height": height, "method": resize_method}
return "%s_matrix/media/v1/thumbnail/%s?%s%s" % (
public_baseurl,
serverAndMediaId,
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urllib.parse.urlencode(params),
fragment or "",
)
return mxc_to_http_filter