MatrixSynapse/synapse/appservice/api.py

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# 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.
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import logging
import urllib.parse
from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Tuple
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from prometheus_client import Counter
from synapse.api.constants import EventTypes, Membership, ThirdPartyEntityKind
from synapse.api.errors import CodeMessageException
from synapse.events import EventBase
from synapse.events.utils import serialize_event
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from synapse.http.client import SimpleHttpClient
from synapse.types import JsonDict, ThirdPartyInstanceID
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from synapse.util.caches.response_cache import ResponseCache
if TYPE_CHECKING:
from synapse.appservice import ApplicationService
from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
sent_transactions_counter = Counter(
"synapse_appservice_api_sent_transactions",
"Number of /transactions/ requests sent",
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["service"],
)
failed_transactions_counter = Counter(
"synapse_appservice_api_failed_transactions",
"Number of /transactions/ requests that failed to send",
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["service"],
)
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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HOUR_IN_MS = 60 * 60 * 1000
APP_SERVICE_PREFIX = "/_matrix/app/unstable"
def _is_valid_3pe_metadata(info: JsonDict) -> bool:
if "instances" not in info:
return False
if not isinstance(info["instances"], list):
return False
return True
def _is_valid_3pe_result(r: JsonDict, field: str) -> bool:
if not isinstance(r, dict):
return False
for k in (field, "protocol"):
if k not in r:
return False
if not isinstance(r[k], str):
return False
if "fields" not in r:
return False
fields = r["fields"]
if not isinstance(fields, dict):
return False
return True
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class ApplicationServiceApi(SimpleHttpClient):
"""This class manages HS -> AS communications, including querying and
pushing.
"""
def __init__(self, hs: "HomeServer"):
super().__init__(hs)
self.clock = hs.get_clock()
self.protocol_meta_cache: ResponseCache[Tuple[str, str]] = ResponseCache(
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hs.get_clock(), "as_protocol_meta", timeout_ms=HOUR_IN_MS
)
async def query_user(self, service: "ApplicationService", user_id: str) -> bool:
if service.url is None:
return False
# This is required by the configuration.
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})
if response is not None: # just an empty json object
return True
except CodeMessageException as e:
if e.code == 404:
return False
logger.warning("query_user to %s received %s", uri, e.code)
except Exception as ex:
logger.warning("query_user to %s threw exception %s", uri, ex)
return False
async def query_alias(self, service: "ApplicationService", alias: str) -> bool:
if service.url is None:
return False
# This is required by the configuration.
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})
if response is not None: # just an empty json object
return True
except CodeMessageException as e:
logger.warning("query_alias to %s received %s", uri, e.code)
if e.code == 404:
return False
except Exception as ex:
logger.warning("query_alias to %s threw exception %s", uri, ex)
return False
async def query_3pe(
self,
service: "ApplicationService",
kind: str,
protocol: str,
fields: Dict[bytes, List[bytes]],
) -> List[JsonDict]:
if kind == ThirdPartyEntityKind.USER:
required_field = "userid"
elif kind == ThirdPartyEntityKind.LOCATION:
required_field = "alias"
else:
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raise ValueError("Unrecognised 'kind' argument %r to query_3pe()", kind)
if service.url is None:
return []
uri = "%s%s/thirdparty/%s/%s" % (
service.url,
APP_SERVICE_PREFIX,
kind,
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urllib.parse.quote(protocol),
)
try:
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response = await self.get_json(uri, fields)
if not isinstance(response, list):
logger.warning(
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"query_3pe to %s returned an invalid response %r", uri, response
)
return []
ret = []
for r in response:
if _is_valid_3pe_result(r, field=required_field):
ret.append(r)
else:
logger.warning(
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"query_3pe to %s returned an invalid result %r", uri, r
)
return ret
except Exception as ex:
logger.warning("query_3pe to %s threw exception %s", uri, ex)
return []
async def get_3pe_protocol(
self, service: "ApplicationService", protocol: str
) -> Optional[JsonDict]:
if service.url is None:
return {}
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async def _get() -> Optional[JsonDict]:
uri = "%s%s/thirdparty/protocol/%s" % (
service.url,
APP_SERVICE_PREFIX,
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urllib.parse.quote(protocol),
)
try:
info = await self.get_json(uri)
if not _is_valid_3pe_metadata(info):
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logger.warning(
"query_3pe_protocol to %s did not return a valid result", uri
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)
return None
for instance in info.get("instances", []):
network_id = instance.get("network_id", None)
if network_id is not None:
instance["instance_id"] = ThirdPartyInstanceID(
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service.id, network_id
).to_string()
return info
except Exception as ex:
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logger.warning("query_3pe_protocol to %s threw exception %s", uri, ex)
return None
key = (service.id, protocol)
return await self.protocol_meta_cache.wrap(key, _get)
async def push_bulk(
self,
service: "ApplicationService",
events: List[EventBase],
ephemeral: List[JsonDict],
to_device_messages: List[JsonDict],
txn_id: Optional[int] = None,
) -> bool:
"""
Push data to an application service.
Args:
service: The application service to send to.
events: The persistent events to send.
ephemeral: The ephemeral events to send.
to_device_messages: The to-device messages to send.
txn_id: An unique ID to assign to this transaction. Application services should
deduplicate transactions received with identitical IDs.
Returns:
True if the task succeeded, False if it failed.
"""
if service.url is None:
return True
# This is required by the configuration.
assert service.hs_token is not None
serialized_events = self._serialize(service, events)
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if txn_id is None:
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logger.warning(
"push_bulk: Missing txn ID sending events to %s", service.url
)
txn_id = 0
uri = service.url + ("/transactions/%s" % urllib.parse.quote(str(txn_id)))
# Never send ephemeral events to appservices that do not support it
body: Dict[str, List[JsonDict]] = {"events": serialized_events}
if service.supports_ephemeral:
body.update(
{
# TODO: Update to stable prefixes once MSC2409 completes FCP merge.
"de.sorunome.msc2409.ephemeral": ephemeral,
"de.sorunome.msc2409.to_device": to_device_messages,
}
)
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try:
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await self.put_json(
uri=uri,
json_body=body,
args={"access_token": service.hs_token},
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)
if logger.isEnabledFor(logging.DEBUG):
logger.debug(
"push_bulk to %s succeeded! events=%s",
uri,
[event.get("event_id") for event in events],
)
sent_transactions_counter.labels(service.id).inc()
sent_events_counter.labels(service.id).inc(len(serialized_events))
return True
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except CodeMessageException as e:
logger.warning(
"push_bulk to %s received code=%s msg=%s",
uri,
e.code,
e.msg,
exc_info=logger.isEnabledFor(logging.DEBUG),
)
except Exception as ex:
logger.warning(
"push_bulk to %s threw exception(%s) %s args=%s",
uri,
type(ex).__name__,
ex,
ex.args,
exc_info=logger.isEnabledFor(logging.DEBUG),
)
failed_transactions_counter.labels(service.id).inc()
return False
def _serialize(
self, service: "ApplicationService", events: Iterable[EventBase]
) -> List[JsonDict]:
time_now = self.clock.time_msec()
return [
serialize_event(
e,
time_now,
as_client_event=True,
# If this is an invite or a knock membership event, and we're interested
# in this user, then include any stripped state alongside the event.
include_stripped_room_state=(
e.type == EventTypes.Member
and (
e.membership == Membership.INVITE
or e.membership == Membership.KNOCK
)
and service.is_interested_in_user(e.state_key)
),
)
for e in events
]