349 lines
12 KiB
Python
349 lines
12 KiB
Python
# Copyright 2015, 2016 OpenMarket Ltd
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# Copyright 2022 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import urllib.parse
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from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Tuple
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from prometheus_client import Counter
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from typing_extensions import TypeGuard
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from synapse.api.constants import EventTypes, Membership, ThirdPartyEntityKind
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from synapse.api.errors import CodeMessageException
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from synapse.appservice import (
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ApplicationService,
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TransactionOneTimeKeyCounts,
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TransactionUnusedFallbackKeys,
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)
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from synapse.events import EventBase
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from synapse.events.utils import SerializeEventConfig, serialize_event
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from synapse.http.client import SimpleHttpClient
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from synapse.types import DeviceListUpdates, JsonDict, ThirdPartyInstanceID
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from synapse.util.caches.response_cache import ResponseCache
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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sent_transactions_counter = Counter(
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"synapse_appservice_api_sent_transactions",
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"Number of /transactions/ requests sent",
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["service"],
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)
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failed_transactions_counter = Counter(
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"synapse_appservice_api_failed_transactions",
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"Number of /transactions/ requests that failed to send",
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["service"],
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)
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sent_events_counter = Counter(
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"synapse_appservice_api_sent_events", "Number of events sent to the AS", ["service"]
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)
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HOUR_IN_MS = 60 * 60 * 1000
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APP_SERVICE_PREFIX = "/_matrix/app/unstable"
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def _is_valid_3pe_metadata(info: JsonDict) -> bool:
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if "instances" not in info:
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return False
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if not isinstance(info["instances"], list):
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return False
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return True
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def _is_valid_3pe_result(r: object, field: str) -> TypeGuard[JsonDict]:
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if not isinstance(r, dict):
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return False
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for k in (field, "protocol"):
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if k not in r:
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return False
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if not isinstance(r[k], str):
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return False
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if "fields" not in r:
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return False
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fields = r["fields"]
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if not isinstance(fields, dict):
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return False
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return True
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class ApplicationServiceApi(SimpleHttpClient):
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"""This class manages HS -> AS communications, including querying and
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pushing.
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"""
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def __init__(self, hs: "HomeServer"):
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super().__init__(hs)
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self.clock = hs.get_clock()
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self.protocol_meta_cache: ResponseCache[Tuple[str, str]] = ResponseCache(
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hs.get_clock(), "as_protocol_meta", timeout_ms=HOUR_IN_MS
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)
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async def query_user(self, service: "ApplicationService", user_id: str) -> bool:
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if service.url is None:
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return False
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# This is required by the configuration.
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assert service.hs_token is not None
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uri = service.url + ("/users/%s" % urllib.parse.quote(user_id))
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try:
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response = await self.get_json(uri, {"access_token": service.hs_token})
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if response is not None: # just an empty json object
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return True
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except CodeMessageException as e:
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if e.code == 404:
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return False
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logger.warning("query_user to %s received %s", uri, e.code)
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except Exception as ex:
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logger.warning("query_user to %s threw exception %s", uri, ex)
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return False
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async def query_alias(self, service: "ApplicationService", alias: str) -> bool:
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if service.url is None:
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return False
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# This is required by the configuration.
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assert service.hs_token is not None
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uri = service.url + ("/rooms/%s" % urllib.parse.quote(alias))
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try:
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response = await self.get_json(uri, {"access_token": service.hs_token})
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if response is not None: # just an empty json object
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return True
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except CodeMessageException as e:
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logger.warning("query_alias to %s received %s", uri, e.code)
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if e.code == 404:
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return False
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except Exception as ex:
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logger.warning("query_alias to %s threw exception %s", uri, ex)
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return False
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async def query_3pe(
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self,
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service: "ApplicationService",
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kind: str,
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protocol: str,
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fields: Dict[bytes, List[bytes]],
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) -> List[JsonDict]:
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if kind == ThirdPartyEntityKind.USER:
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required_field = "userid"
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elif kind == ThirdPartyEntityKind.LOCATION:
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required_field = "alias"
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else:
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raise ValueError("Unrecognised 'kind' argument %r to query_3pe()", kind)
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if service.url is None:
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return []
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uri = "%s%s/thirdparty/%s/%s" % (
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service.url,
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APP_SERVICE_PREFIX,
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kind,
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urllib.parse.quote(protocol),
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)
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try:
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response = await self.get_json(uri, fields)
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if not isinstance(response, list):
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logger.warning(
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"query_3pe to %s returned an invalid response %r", uri, response
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)
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return []
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ret = []
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for r in response:
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if _is_valid_3pe_result(r, field=required_field):
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ret.append(r)
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else:
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logger.warning(
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"query_3pe to %s returned an invalid result %r", uri, r
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)
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return ret
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except Exception as ex:
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logger.warning("query_3pe to %s threw exception %s", uri, ex)
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return []
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async def get_3pe_protocol(
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self, service: "ApplicationService", protocol: str
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) -> Optional[JsonDict]:
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if service.url is None:
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return {}
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async def _get() -> Optional[JsonDict]:
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uri = "%s%s/thirdparty/protocol/%s" % (
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service.url,
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APP_SERVICE_PREFIX,
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urllib.parse.quote(protocol),
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)
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try:
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info = await self.get_json(uri)
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if not _is_valid_3pe_metadata(info):
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logger.warning(
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"query_3pe_protocol to %s did not return a valid result", uri
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)
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return None
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for instance in info.get("instances", []):
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network_id = instance.get("network_id", None)
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if network_id is not None:
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instance["instance_id"] = ThirdPartyInstanceID(
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service.id, network_id
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).to_string()
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return info
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except Exception as ex:
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logger.warning("query_3pe_protocol to %s threw exception %s", uri, ex)
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return None
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key = (service.id, protocol)
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return await self.protocol_meta_cache.wrap(key, _get)
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async def push_bulk(
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self,
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service: "ApplicationService",
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events: List[EventBase],
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ephemeral: List[JsonDict],
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to_device_messages: List[JsonDict],
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one_time_key_counts: TransactionOneTimeKeyCounts,
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unused_fallback_keys: TransactionUnusedFallbackKeys,
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device_list_summary: DeviceListUpdates,
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txn_id: Optional[int] = None,
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) -> bool:
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"""
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Push data to an application service.
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Args:
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service: The application service to send to.
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events: The persistent events to send.
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ephemeral: The ephemeral events to send.
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to_device_messages: The to-device messages to send.
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txn_id: An unique ID to assign to this transaction. Application services should
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deduplicate transactions received with identitical IDs.
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Returns:
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True if the task succeeded, False if it failed.
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"""
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if service.url is None:
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return True
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# This is required by the configuration.
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assert service.hs_token is not None
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serialized_events = self._serialize(service, events)
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if txn_id is None:
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logger.warning(
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"push_bulk: Missing txn ID sending events to %s", service.url
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)
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txn_id = 0
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uri = service.url + ("/transactions/%s" % urllib.parse.quote(str(txn_id)))
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# Never send ephemeral events to appservices that do not support it
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body: JsonDict = {"events": serialized_events}
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if service.supports_ephemeral:
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body.update(
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{
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# TODO: Update to stable prefixes once MSC2409 completes FCP merge.
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"de.sorunome.msc2409.ephemeral": ephemeral,
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"de.sorunome.msc2409.to_device": to_device_messages,
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}
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)
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# TODO: Update to stable prefixes once MSC3202 completes FCP merge
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if service.msc3202_transaction_extensions:
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if one_time_key_counts:
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body[
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"org.matrix.msc3202.device_one_time_key_counts"
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] = one_time_key_counts
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if unused_fallback_keys:
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body[
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"org.matrix.msc3202.device_unused_fallback_key_types"
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] = unused_fallback_keys
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if device_list_summary:
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body["org.matrix.msc3202.device_lists"] = {
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"changed": list(device_list_summary.changed),
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"left": list(device_list_summary.left),
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}
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try:
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await self.put_json(
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uri=uri,
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json_body=body,
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args={"access_token": service.hs_token},
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)
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if logger.isEnabledFor(logging.DEBUG):
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logger.debug(
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"push_bulk to %s succeeded! events=%s",
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uri,
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[event.get("event_id") for event in events],
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)
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sent_transactions_counter.labels(service.id).inc()
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sent_events_counter.labels(service.id).inc(len(serialized_events))
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return True
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except CodeMessageException as e:
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logger.warning(
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"push_bulk to %s received code=%s msg=%s",
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uri,
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e.code,
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e.msg,
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exc_info=logger.isEnabledFor(logging.DEBUG),
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)
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except Exception as ex:
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logger.warning(
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"push_bulk to %s threw exception(%s) %s args=%s",
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uri,
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type(ex).__name__,
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ex,
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ex.args,
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exc_info=logger.isEnabledFor(logging.DEBUG),
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)
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failed_transactions_counter.labels(service.id).inc()
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return False
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def _serialize(
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self, service: "ApplicationService", events: Iterable[EventBase]
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) -> List[JsonDict]:
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time_now = self.clock.time_msec()
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return [
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serialize_event(
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e,
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time_now,
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config=SerializeEventConfig(
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as_client_event=True,
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# If this is an invite or a knock membership event, and we're interested
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# in this user, then include any stripped state alongside the event.
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include_stripped_room_state=(
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e.type == EventTypes.Member
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and (
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e.membership == Membership.INVITE
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or e.membership == Membership.KNOCK
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)
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and service.is_interested_in_user(e.state_key)
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),
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),
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)
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for e in events
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]
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