364 lines
12 KiB
Python
364 lines
12 KiB
Python
# Copyright 2015, 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 logging
|
|
import re
|
|
from enum import Enum
|
|
from typing import TYPE_CHECKING, Iterable, List, Match, Optional
|
|
|
|
from synapse.api.constants import EventTypes
|
|
from synapse.events import EventBase
|
|
from synapse.types import GroupID, JsonDict, UserID, get_domain_from_id
|
|
from synapse.util.caches.descriptors import _CacheContext, cached
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.appservice.api import ApplicationServiceApi
|
|
from synapse.storage.databases.main import DataStore
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class ApplicationServiceState(Enum):
|
|
DOWN = "down"
|
|
UP = "up"
|
|
|
|
|
|
class ApplicationService:
|
|
"""Defines an application service. This definition is mostly what is
|
|
provided to the /register AS API.
|
|
|
|
Provides methods to check if this service is "interested" in events.
|
|
"""
|
|
|
|
NS_USERS = "users"
|
|
NS_ALIASES = "aliases"
|
|
NS_ROOMS = "rooms"
|
|
# The ordering here is important as it is used to map database values (which
|
|
# are stored as ints representing the position in this list) to namespace
|
|
# values.
|
|
NS_LIST = [NS_USERS, NS_ALIASES, NS_ROOMS]
|
|
|
|
def __init__(
|
|
self,
|
|
token,
|
|
hostname,
|
|
id,
|
|
sender,
|
|
url=None,
|
|
namespaces=None,
|
|
hs_token=None,
|
|
protocols=None,
|
|
rate_limited=True,
|
|
ip_range_whitelist=None,
|
|
supports_ephemeral=False,
|
|
):
|
|
self.token = token
|
|
self.url = (
|
|
url.rstrip("/") if isinstance(url, str) else None
|
|
) # url must not end with a slash
|
|
self.hs_token = hs_token
|
|
self.sender = sender
|
|
self.server_name = hostname
|
|
self.namespaces = self._check_namespaces(namespaces)
|
|
self.id = id
|
|
self.ip_range_whitelist = ip_range_whitelist
|
|
self.supports_ephemeral = supports_ephemeral
|
|
|
|
if "|" in self.id:
|
|
raise Exception("application service ID cannot contain '|' character")
|
|
|
|
# .protocols is a publicly visible field
|
|
if protocols:
|
|
self.protocols = set(protocols)
|
|
else:
|
|
self.protocols = set()
|
|
|
|
self.rate_limited = rate_limited
|
|
|
|
def _check_namespaces(self, namespaces):
|
|
# Sanity check that it is of the form:
|
|
# {
|
|
# users: [ {regex: "[A-z]+.*", exclusive: true}, ...],
|
|
# aliases: [ {regex: "[A-z]+.*", exclusive: true}, ...],
|
|
# rooms: [ {regex: "[A-z]+.*", exclusive: true}, ...],
|
|
# }
|
|
if not namespaces:
|
|
namespaces = {}
|
|
|
|
for ns in ApplicationService.NS_LIST:
|
|
if ns not in namespaces:
|
|
namespaces[ns] = []
|
|
continue
|
|
|
|
if type(namespaces[ns]) != list:
|
|
raise ValueError("Bad namespace value for '%s'" % ns)
|
|
for regex_obj in namespaces[ns]:
|
|
if not isinstance(regex_obj, dict):
|
|
raise ValueError("Expected dict regex for ns '%s'" % ns)
|
|
if not isinstance(regex_obj.get("exclusive"), bool):
|
|
raise ValueError("Expected bool for 'exclusive' in ns '%s'" % ns)
|
|
group_id = regex_obj.get("group_id")
|
|
if group_id:
|
|
if not isinstance(group_id, str):
|
|
raise ValueError(
|
|
"Expected string for 'group_id' in ns '%s'" % ns
|
|
)
|
|
try:
|
|
GroupID.from_string(group_id)
|
|
except Exception:
|
|
raise ValueError(
|
|
"Expected valid group ID for 'group_id' in ns '%s'" % ns
|
|
)
|
|
|
|
if get_domain_from_id(group_id) != self.server_name:
|
|
raise ValueError(
|
|
"Expected 'group_id' to be this host in ns '%s'" % ns
|
|
)
|
|
|
|
regex = regex_obj.get("regex")
|
|
if isinstance(regex, str):
|
|
regex_obj["regex"] = re.compile(regex) # Pre-compile regex
|
|
else:
|
|
raise ValueError("Expected string for 'regex' in ns '%s'" % ns)
|
|
return namespaces
|
|
|
|
def _matches_regex(self, test_string: str, namespace_key: str) -> Optional[Match]:
|
|
for regex_obj in self.namespaces[namespace_key]:
|
|
if regex_obj["regex"].match(test_string):
|
|
return regex_obj
|
|
return None
|
|
|
|
def _is_exclusive(self, ns_key: str, test_string: str) -> bool:
|
|
regex_obj = self._matches_regex(test_string, ns_key)
|
|
if regex_obj:
|
|
return regex_obj["exclusive"]
|
|
return False
|
|
|
|
async def _matches_user(
|
|
self, event: Optional[EventBase], store: Optional["DataStore"] = None
|
|
) -> bool:
|
|
if not event:
|
|
return False
|
|
|
|
if self.is_interested_in_user(event.sender):
|
|
return True
|
|
# also check m.room.member state key
|
|
if event.type == EventTypes.Member and self.is_interested_in_user(
|
|
event.state_key
|
|
):
|
|
return True
|
|
|
|
if not store:
|
|
return False
|
|
|
|
does_match = await self.matches_user_in_member_list(event.room_id, store)
|
|
return does_match
|
|
|
|
@cached(num_args=1, cache_context=True)
|
|
async def matches_user_in_member_list(
|
|
self,
|
|
room_id: str,
|
|
store: "DataStore",
|
|
cache_context: _CacheContext,
|
|
) -> bool:
|
|
"""Check if this service is interested a room based upon it's membership
|
|
|
|
Args:
|
|
room_id: The room to check.
|
|
store: The datastore to query.
|
|
|
|
Returns:
|
|
True if this service would like to know about this room.
|
|
"""
|
|
member_list = await store.get_users_in_room(
|
|
room_id, on_invalidate=cache_context.invalidate
|
|
)
|
|
|
|
# check joined member events
|
|
for user_id in member_list:
|
|
if self.is_interested_in_user(user_id):
|
|
return True
|
|
return False
|
|
|
|
def _matches_room_id(self, event: EventBase) -> bool:
|
|
if hasattr(event, "room_id"):
|
|
return self.is_interested_in_room(event.room_id)
|
|
return False
|
|
|
|
async def _matches_aliases(
|
|
self, event: EventBase, store: Optional["DataStore"] = None
|
|
) -> bool:
|
|
if not store or not event:
|
|
return False
|
|
|
|
alias_list = await store.get_aliases_for_room(event.room_id)
|
|
for alias in alias_list:
|
|
if self.is_interested_in_alias(alias):
|
|
return True
|
|
return False
|
|
|
|
async def is_interested(
|
|
self, event: EventBase, store: Optional["DataStore"] = None
|
|
) -> bool:
|
|
"""Check if this service is interested in this event.
|
|
|
|
Args:
|
|
event: The event to check.
|
|
store: The datastore to query.
|
|
|
|
Returns:
|
|
True if this service would like to know about this event.
|
|
"""
|
|
# Do cheap checks first
|
|
if self._matches_room_id(event):
|
|
return True
|
|
|
|
# This will check the namespaces first before
|
|
# checking the store, so should be run before _matches_aliases
|
|
if await self._matches_user(event, store):
|
|
return True
|
|
|
|
# This will check the store, so should be run last
|
|
if await self._matches_aliases(event, store):
|
|
return True
|
|
|
|
return False
|
|
|
|
@cached(num_args=1)
|
|
async def is_interested_in_presence(
|
|
self, user_id: UserID, store: "DataStore"
|
|
) -> bool:
|
|
"""Check if this service is interested a user's presence
|
|
|
|
Args:
|
|
user_id: The user to check.
|
|
store: The datastore to query.
|
|
|
|
Returns:
|
|
True if this service would like to know about presence for this user.
|
|
"""
|
|
# Find all the rooms the sender is in
|
|
if self.is_interested_in_user(user_id.to_string()):
|
|
return True
|
|
room_ids = await store.get_rooms_for_user(user_id.to_string())
|
|
|
|
# Then find out if the appservice is interested in any of those rooms
|
|
for room_id in room_ids:
|
|
if await self.matches_user_in_member_list(room_id, store):
|
|
return True
|
|
return False
|
|
|
|
def is_interested_in_user(self, user_id: str) -> bool:
|
|
return (
|
|
bool(self._matches_regex(user_id, ApplicationService.NS_USERS))
|
|
or user_id == self.sender
|
|
)
|
|
|
|
def is_interested_in_alias(self, alias: str) -> bool:
|
|
return bool(self._matches_regex(alias, ApplicationService.NS_ALIASES))
|
|
|
|
def is_interested_in_room(self, room_id: str) -> bool:
|
|
return bool(self._matches_regex(room_id, ApplicationService.NS_ROOMS))
|
|
|
|
def is_exclusive_user(self, user_id: str) -> bool:
|
|
return (
|
|
self._is_exclusive(ApplicationService.NS_USERS, user_id)
|
|
or user_id == self.sender
|
|
)
|
|
|
|
def is_interested_in_protocol(self, protocol: str) -> bool:
|
|
return protocol in self.protocols
|
|
|
|
def is_exclusive_alias(self, alias: str) -> bool:
|
|
return self._is_exclusive(ApplicationService.NS_ALIASES, alias)
|
|
|
|
def is_exclusive_room(self, room_id: str) -> bool:
|
|
return self._is_exclusive(ApplicationService.NS_ROOMS, room_id)
|
|
|
|
def get_exclusive_user_regexes(self):
|
|
"""Get the list of regexes used to determine if a user is exclusively
|
|
registered by the AS
|
|
"""
|
|
return [
|
|
regex_obj["regex"]
|
|
for regex_obj in self.namespaces[ApplicationService.NS_USERS]
|
|
if regex_obj["exclusive"]
|
|
]
|
|
|
|
def get_groups_for_user(self, user_id: str) -> Iterable[str]:
|
|
"""Get the groups that this user is associated with by this AS
|
|
|
|
Args:
|
|
user_id: The ID of the user.
|
|
|
|
Returns:
|
|
An iterable that yields group_id strings.
|
|
"""
|
|
return (
|
|
regex_obj["group_id"]
|
|
for regex_obj in self.namespaces[ApplicationService.NS_USERS]
|
|
if "group_id" in regex_obj and regex_obj["regex"].match(user_id)
|
|
)
|
|
|
|
def is_rate_limited(self) -> bool:
|
|
return self.rate_limited
|
|
|
|
def __str__(self):
|
|
# copy dictionary and redact token fields so they don't get logged
|
|
dict_copy = self.__dict__.copy()
|
|
dict_copy["token"] = "<redacted>"
|
|
dict_copy["hs_token"] = "<redacted>"
|
|
return "ApplicationService: %s" % (dict_copy,)
|
|
|
|
|
|
class AppServiceTransaction:
|
|
"""Represents an application service transaction."""
|
|
|
|
def __init__(
|
|
self,
|
|
service: ApplicationService,
|
|
id: int,
|
|
events: List[EventBase],
|
|
ephemeral: List[JsonDict],
|
|
):
|
|
self.service = service
|
|
self.id = id
|
|
self.events = events
|
|
self.ephemeral = ephemeral
|
|
|
|
async def send(self, as_api: "ApplicationServiceApi") -> bool:
|
|
"""Sends this transaction using the provided AS API interface.
|
|
|
|
Args:
|
|
as_api: The API to use to send.
|
|
Returns:
|
|
True if the transaction was sent.
|
|
"""
|
|
return await as_api.push_bulk(
|
|
service=self.service,
|
|
events=self.events,
|
|
ephemeral=self.ephemeral,
|
|
txn_id=self.id,
|
|
)
|
|
|
|
async def complete(self, store: "DataStore") -> None:
|
|
"""Completes this transaction as successful.
|
|
|
|
Marks this transaction ID on the application service and removes the
|
|
transaction contents from the database.
|
|
|
|
Args:
|
|
store: The database store to operate on.
|
|
"""
|
|
await store.complete_appservice_txn(service=self.service, txn_id=self.id)
|