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synapse-old/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
import email.utils
import logging
import urllib.parse
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from typing import Iterable, List, TypeVar
import bleach
import jinja2
from synapse.api.constants import EventTypes, Membership
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 (
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__)
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 = [
"font", # custom to matrix for IRC-style font coloring
"del", # for markdown
# deliberately no h1/h2 to stop people shouting.
"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"],
}
# When bleach release a version with this option, we can specify schemes
# ALLOWED_SCHEMES = ["http", "https", "ftp", "mailto"]
class Mailer:
def __init__(self, hs, app_name, template_html, template_text):
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()
self.storage = hs.get_storage()
self.app_name = app_name
self.email_subjects = hs.config.email_subjects # type: EmailSubjectConfig
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 = (
self.hs.config.public_baseurl
+ "_synapse/client/password_reset/email/submit_token?%s"
% urllib.parse.urlencode(params)
)
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(
self, app_id, user_id, email_address, push_actions, reason
):
"""Send email regarding a user's room notifications"""
rooms_in_order = deduped_ordered_list([pa["room_id"] for pa in push_actions])
notif_events = await self.store.get_events(
[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
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]
)
rooms.append(roomvars)
reason["room_name"] = await calculate_room_name(
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,
"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:
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]
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")
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(
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
):
# Check if one of the notifs is an invite event for the user.
is_invite = False
for n in notifs:
ev = notif_events[n["event_id"]]
if ev.type == EventTypes.Member and ev.state_key == user_id:
if ev.content.get("membership") == Membership.INVITE:
is_invite = True
break
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": [],
"invite": is_invite,
"link": self.make_room_link(room_id),
}
if not is_invite:
for n in notifs:
notifvars = await self.get_notif_vars(
n, user_id, notif_events[n["event_id"]], room_state_ids
)
# merge overlapping notifs together.
# relies on the notifs being in chronological order.
merge = False
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:
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(
notif["room_id"],
notif["event_id"],
before_limit=CONTEXT_BEFORE,
after_limit=CONTEXT_AFTER,
)
ret = {
"link": self.make_notif_link(notif),
"ts": notif["received_ts"],
"messages": [],
}
the_events = await filter_events_for_client(
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)
if messagevars is not None:
ret["messages"].append(messagevars)
return ret
async def get_message_vars(self, notif, event, room_state_ids):
if event.type != EventTypes.Message and event.type != EventTypes.Encrypted:
return None
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)
ret = {
"event_type": event.type,
"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,
}
# Encrypted messages don't have any additional useful information.
if event.type == EventTypes.Encrypted:
return ret
msgtype = event.content.get("msgtype")
ret["msgtype"] = msgtype
if msgtype == "m.text":
self.add_text_message_vars(ret, event)
elif msgtype == "m.image":
self.add_image_message_vars(ret, event)
if "body" in event.content:
ret["body_text_plain"] = event.content["body"]
return ret
def add_text_message_vars(self, messagevars, event):
msgformat = event.content.get("format")
messagevars["format"] = msgformat
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)
return messagevars
def add_image_message_vars(self, messagevars, event):
messagevars["image_url"] = event.content["url"]
return messagevars
async def make_summary_text(
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
)
# See if one of the notifs is an invite event for the user
invite_event = None
for n in notifs_by_room[room_id]:
ev = notif_events[n["event_id"]]
if ev.type == EventTypes.Member and ev.state_key == user_id:
if ev.content.get("membership") == Membership.INVITE:
invite_event = ev
break
if invite_event:
inviter_member_event_id = room_state_ids[room_id].get(
("m.room.member", invite_event.sender)
)
inviter_name = invite_event.sender
if inviter_member_event_id:
inviter_member_event = await self.store.get_event(
inviter_member_event_id, allow_none=True
)
if inviter_member_event:
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,
}
else:
return self.email_subjects.invite_from_person_to_room % {
"person": inviter_name,
"room": room_name,
"app": self.app_name,
}
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)
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"
sender_ids = list(
{
notif_events[n["event_id"]].sender
for n in notifs_by_room[room_id]
}
)
member_events = await self.store.get_events(
[
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
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"]
sender_ids = list(
{
notif_events[n["event_id"]].sender
for n in notifs_by_room[room_id]
}
)
member_events = await self.store.get_events(
[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,
}
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)
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,
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" % (
notif["room_id"],
notif["event_id"],
)
else:
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,
urllib.parse.urlencode(params),
)
def safe_markup(raw_html):
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,
)
)
)
def safe_text(raw_text):
"""
Process text: treat it as HTML but escape any tags (ie. just escape the
HTML) then linkify it.
"""
return jinja2.Markup(
bleach.linkify(bleach.clean(raw_text, tags=[], attributes={}, strip=False))
)
def deduped_ordered_list(it: Iterable[T]) -> List[T]:
seen = set()
ret = []
for item in it:
if item not in seen:
seen.add(item)
ret.append(item)
return ret
def string_ordinal_total(s):
tot = 0
for c in s:
tot += ord(c)
return tot
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