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Add some type annotations to the federation base & client classes (#6995)

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Patrick Cloke 2020-02-28 07:31:07 -05:00 committed by GitHub
parent 9b06d8f8a6
commit 12d4259000
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4 changed files with 45 additions and 28 deletions
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1
changelog.d/6995.misc Normal file
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@ -0,0 +1 @@
Add some type annotations to the federation base & client classes.

60
synapse/federation/federation_base.py
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@ -15,11 +15,13 @@
# limitations under the License.
import logging
from collections import namedtuple
from typing import Iterable, List
import six
from twisted.internet import defer
from twisted.internet.defer import DeferredList
from twisted.internet.defer import Deferred, DeferredList
from twisted.python.failure import Failure
from synapse.api.constants import MAX_DEPTH, EventTypes, Membership
from synapse.api.errors import Codes, SynapseError
@ -29,6 +31,7 @@ from synapse.api.room_versions import (
RoomVersion,
)
from synapse.crypto.event_signing import check_event_content_hash
from synapse.crypto.keyring import Keyring
from synapse.events import EventBase, make_event_from_dict
from synapse.events.utils import prune_event
from synapse.http.servlet import assert_params_in_dict
@ -56,7 +59,12 @@ class FederationBase(object):
@defer.inlineCallbacks
def _check_sigs_and_hash_and_fetch(
self, origin, pdus, room_version, outlier=False, include_none=False
self,
origin: str,
pdus: List[EventBase],
room_version: str,
outlier: bool = False,
include_none: bool = False,
):
"""Takes a list of PDUs and checks the signatures and hashs of each
one. If a PDU fails its signature check then we check if we have it in
@ -69,11 +77,11 @@ class FederationBase(object):
a new list.
Args:
origin (str)
pdu (list)
room_version (str)
outlier (bool): Whether the events are outliers or not
include_none (str): Whether to include None in the returned list
origin
pdu
room_version
outlier: Whether the events are outliers or not
include_none: Whether to include None in the returned list
for events that have failed their checks
Returns:
@ -82,7 +90,7 @@ class FederationBase(object):
deferreds = self._check_sigs_and_hashes(room_version, pdus)
@defer.inlineCallbacks
def handle_check_result(pdu, deferred):
def handle_check_result(pdu: EventBase, deferred: Deferred):
try:
res = yield make_deferred_yieldable(deferred)
except SynapseError:
@ -96,8 +104,10 @@ class FederationBase(object):
if not res and pdu.origin != origin:
try:
# This should not exist in the base implementation, until
# this is fixed, ignore it for typing. See issue #6997.
res = yield defer.ensureDeferred(
self.get_pdu(
self.get_pdu( # type: ignore
destinations=[pdu.origin],
event_id=pdu.event_id,
room_version=room_version,
@ -127,21 +137,23 @@ class FederationBase(object):
else:
return [p for p in valid_pdus if p]
def _check_sigs_and_hash(self, room_version, pdu):
def _check_sigs_and_hash(self, room_version: str, pdu: EventBase) -> Deferred:
return make_deferred_yieldable(
self._check_sigs_and_hashes(room_version, [pdu])[0]
)
def _check_sigs_and_hashes(self, room_version, pdus):
def _check_sigs_and_hashes(
self, room_version: str, pdus: List[EventBase]
) -> List[Deferred]:
"""Checks that each of the received events is correctly signed by the
sending server.
Args:
room_version (str): The room version of the PDUs
pdus (list[FrozenEvent]): the events to be checked
room_version: The room version of the PDUs
pdus: the events to be checked
Returns:
list[Deferred]: for each input event, a deferred which:
For each input event, a deferred which:
* returns the original event if the checks pass
* returns a redacted version of the event (if the signature
matched but the hash did not)
@ -152,7 +164,7 @@ class FederationBase(object):
ctx = LoggingContext.current_context()
def callback(_, pdu):
def callback(_, pdu: EventBase):
with PreserveLoggingContext(ctx):
if not check_event_content_hash(pdu):
# let's try to distinguish between failures because the event was
@ -189,7 +201,7 @@ class FederationBase(object):
return pdu
def errback(failure, pdu):
def errback(failure: Failure, pdu: EventBase):
failure.trap(SynapseError)
with PreserveLoggingContext(ctx):
logger.warning(
@ -215,16 +227,18 @@ class PduToCheckSig(
pass
def _check_sigs_on_pdus(keyring, room_version, pdus):
def _check_sigs_on_pdus(
keyring: Keyring, room_version: str, pdus: Iterable[EventBase]
) -> List[Deferred]:
"""Check that the given events are correctly signed
Args:
keyring (synapse.crypto.Keyring): keyring object to do the checks
room_version (str): the room version of the PDUs
pdus (Collection[EventBase]): the events to be checked
keyring: keyring object to do the checks
room_version: the room version of the PDUs
pdus: the events to be checked
Returns:
List[Deferred]: a Deferred for each event in pdus, which will either succeed if
A Deferred for each event in pdus, which will either succeed if
the signatures are valid, or fail (with a SynapseError) if not.
"""
@ -329,7 +343,7 @@ def _check_sigs_on_pdus(keyring, room_version, pdus):
return [_flatten_deferred_list(p.deferreds) for p in pdus_to_check]
def _flatten_deferred_list(deferreds):
def _flatten_deferred_list(deferreds: List[Deferred]) -> Deferred:
"""Given a list of deferreds, either return the single deferred,
combine into a DeferredList, or return an already resolved deferred.
"""
@ -341,7 +355,7 @@ def _flatten_deferred_list(deferreds):
return defer.succeed(None)
def _is_invite_via_3pid(event):
def _is_invite_via_3pid(event: EventBase) -> bool:
return (
event.type == EventTypes.Member
and event.membership == Membership.INVITE

10
synapse/federation/federation_client.py
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@ -187,7 +187,7 @@ class FederationClient(FederationBase):
async def backfill(
self, dest: str, room_id: str, limit: int, extremities: Iterable[str]
) -> List[EventBase]:
) -> Optional[List[EventBase]]:
"""Requests some more historic PDUs for the given room from the
given destination server.
@ -199,9 +199,9 @@ class FederationClient(FederationBase):
"""
logger.debug("backfill extrem=%s", extremities)
# If there are no extremeties then we've (probably) reached the start.
# If there are no extremities then we've (probably) reached the start.
if not extremities:
return
return None
transaction_data = await self.transport_layer.backfill(
dest, room_id, extremities, limit
@ -284,7 +284,7 @@ class FederationClient(FederationBase):
pdu_list = [
event_from_pdu_json(p, room_version, outlier=outlier)
for p in transaction_data["pdus"]
]
] # type: List[EventBase]
if pdu_list and pdu_list[0]:
pdu = pdu_list[0]
@ -615,7 +615,7 @@ class FederationClient(FederationBase):
]
if auth_chain_create_events != [create_event.event_id]:
raise InvalidResponseError(
"Unexpected create event(s) in auth chain"
"Unexpected create event(s) in auth chain: %s"
% (auth_chain_create_events,)
)

2
tox.ini
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@ -181,6 +181,8 @@ commands = mypy \
synapse/appservice \
synapse/config \
synapse/events/spamcheck.py \
synapse/federation/federation_base.py \
synapse/federation/federation_client.py \
synapse/federation/sender \
synapse/federation/transport \
synapse/handlers/presence.py \