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Merge pull request #319 from matrix-org/erikj/filter_refactor
Refactor api.filtering to have a Filter API
This commit is contained in:
Erik Johnston
commit
b0ac0a9438
3 changed files with 104 additions and 137 deletions
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@ -24,7 +24,7 @@ class Filtering(object):
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def get_user_filter(self, user_localpart, filter_id):
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result = self.store.get_user_filter(user_localpart, filter_id)
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result.addCallback(Filter)
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result.addCallback(FilterCollection)
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return result
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def add_user_filter(self, user_localpart, user_filter):
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@ -131,125 +131,87 @@ class Filtering(object):
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raise SynapseError(400, "Bad bundle_updates: expected bool.")
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class FilterCollection(object):
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def __init__(self, filter_json):
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self.filter_json = filter_json
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self.room_timeline_filter = Filter(
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self.filter_json.get("room", {}).get("timeline", {})
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)
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self.room_state_filter = Filter(
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self.filter_json.get("room", {}).get("state", {})
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)
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self.room_ephemeral_filter = Filter(
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self.filter_json.get("room", {}).get("ephemeral", {})
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)
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self.presence_filter = Filter(
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self.filter_json.get("presence", {})
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)
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def timeline_limit(self):
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return self.room_timeline_filter.limit()
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def presence_limit(self):
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return self.presence_filter.limit()
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def ephemeral_limit(self):
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return self.room_ephemeral_filter.limit()
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def filter_presence(self, events):
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return self.presence_filter.filter(events)
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def filter_room_state(self, events):
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return self.room_state_filter.filter(events)
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def filter_room_timeline(self, events):
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return self.room_timeline_filter.filter(events)
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def filter_room_ephemeral(self, events):
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return self.room_ephemeral_filter.filter(events)
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class Filter(object):
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def __init__(self, filter_json):
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self.filter_json = filter_json
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def timeline_limit(self):
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return self.filter_json.get("room", {}).get("timeline", {}).get("limit", 10)
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def check(self, event):
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"""Checks whether the filter matches the given event.
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def presence_limit(self):
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return self.filter_json.get("presence", {}).get("limit", 10)
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def ephemeral_limit(self):
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return self.filter_json.get("room", {}).get("ephemeral", {}).get("limit", 10)
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def filter_presence(self, events):
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return self._filter_on_key(events, ["presence"])
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def filter_room_state(self, events):
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return self._filter_on_key(events, ["room", "state"])
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def filter_room_timeline(self, events):
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return self._filter_on_key(events, ["room", "timeline"])
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def filter_room_ephemeral(self, events):
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return self._filter_on_key(events, ["room", "ephemeral"])
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def _filter_on_key(self, events, keys):
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filter_json = self.filter_json
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if not filter_json:
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return events
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try:
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# extract the right definition from the filter
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definition = filter_json
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for key in keys:
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definition = definition[key]
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return self._filter_with_definition(events, definition)
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except KeyError:
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# return all events if definition isn't specified.
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return events
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def _filter_with_definition(self, events, definition):
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return [e for e in events if self._passes_definition(definition, e)]
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def _passes_definition(self, definition, event):
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"""Check if the event passes the filter definition
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Args:
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definition(dict): The filter definition to check against
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event(dict or Event): The event to check
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Returns:
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True if the event passes the filter in the definition
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bool: True if the event matches
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"""
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if type(event) is dict:
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room_id = event.get("room_id")
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sender = event.get("sender")
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event_type = event["type"]
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else:
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room_id = getattr(event, "room_id", None)
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sender = getattr(event, "sender", None)
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event_type = event.type
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return self._event_passes_definition(
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definition, room_id, sender, event_type
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)
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literal_keys = {
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"rooms": lambda v: event.room_id == v,
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"senders": lambda v: event.sender == v,
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"types": lambda v: _matches_wildcard(event.type, v)
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}
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def _event_passes_definition(self, definition, room_id, sender,
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event_type):
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"""Check if the event passes through the given definition.
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Args:
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definition(dict): The definition to check against.
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room_id(str): The id of the room this event is in or None.
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sender(str): The sender of the event
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event_type(str): The type of the event.
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Returns:
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True if the event passes through the filter.
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"""
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# Algorithm notes:
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# For each key in the definition, check the event meets the criteria:
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# * For types: Literal match or prefix match (if ends with wildcard)
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# * For senders/rooms: Literal match only
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# * "not_" checks take presedence (e.g. if "m.*" is in both 'types'
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# and 'not_types' then it is treated as only being in 'not_types')
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# room checks
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if room_id is not None:
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allow_rooms = definition.get("rooms", None)
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reject_rooms = definition.get("not_rooms", None)
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if reject_rooms and room_id in reject_rooms:
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return False
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if allow_rooms and room_id not in allow_rooms:
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for name, match_func in literal_keys.items():
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not_name = "not_%s" % (name,)
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disallowed_values = self.filter_json.get(not_name, [])
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if any(map(match_func, disallowed_values)):
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return False
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# sender checks
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if sender is not None:
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allow_senders = definition.get("senders", None)
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reject_senders = definition.get("not_senders", None)
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if reject_senders and sender in reject_senders:
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return False
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if allow_senders and sender not in allow_senders:
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return False
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# type checks
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if "not_types" in definition:
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for def_type in definition["not_types"]:
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if self._event_matches_type(event_type, def_type):
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return False
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if "types" in definition:
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included = False
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for def_type in definition["types"]:
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if self._event_matches_type(event_type, def_type):
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included = True
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break
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if not included:
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allowed_values = self.filter_json.get(name, None)
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if allowed_values is not None:
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if not any(map(match_func, allowed_values)):
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return False
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return True
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def _event_matches_type(self, event_type, def_type):
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if def_type.endswith("*"):
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type_prefix = def_type[:-1]
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return event_type.startswith(type_prefix)
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def filter(self, events):
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return filter(self.check, events)
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def limit(self):
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return self.filter_json.get("limit", 10)
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def _matches_wildcard(actual_value, filter_value):
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if filter_value.endswith("*"):
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type_prefix = filter_value[:-1]
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return actual_value.startswith(type_prefix)
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else:
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return event_type == def_type
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return actual_value == filter_value
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@ -23,7 +23,7 @@ from synapse.types import StreamToken
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from synapse.events.utils import (
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serialize_event, format_event_for_client_v2_without_event_id,
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)
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from synapse.api.filtering import Filter
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from synapse.api.filtering import FilterCollection
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from ._base import client_v2_pattern
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import copy
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@ -103,7 +103,7 @@ class SyncRestServlet(RestServlet):
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user.localpart, filter_id
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)
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except:
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filter = Filter({})
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filter = FilterCollection({})
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sync_config = SyncConfig(
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user=user,
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@ -23,10 +23,17 @@ from tests.utils import (
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)
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from synapse.types import UserID
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from synapse.api.filtering import Filter
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from synapse.api.filtering import FilterCollection, Filter
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user_localpart = "test_user"
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MockEvent = namedtuple("MockEvent", "sender type room_id")
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# MockEvent = namedtuple("MockEvent", "sender type room_id")
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def MockEvent(**kwargs):
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ev = NonCallableMock(spec_set=kwargs.keys())
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ev.configure_mock(**kwargs)
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return ev
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class FilteringTestCase(unittest.TestCase):
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@ -44,7 +51,6 @@ class FilteringTestCase(unittest.TestCase):
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)
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self.filtering = hs.get_filtering()
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self.filter = Filter({})
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self.datastore = hs.get_datastore()
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@ -57,8 +63,9 @@ class FilteringTestCase(unittest.TestCase):
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type="m.room.message",
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room_id="!foo:bar"
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)
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self.assertTrue(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_types_works_with_wildcards(self):
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@ -71,7 +78,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertTrue(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_types_works_with_unknowns(self):
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@ -84,7 +91,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_types_works_with_literals(self):
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@ -97,7 +104,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_types_works_with_wildcards(self):
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@ -110,7 +117,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_types_works_with_unknowns(self):
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@ -123,7 +130,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertTrue(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_types_takes_priority_over_types(self):
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@ -137,7 +144,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_senders_works_with_literals(self):
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@ -150,7 +157,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertTrue(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_senders_works_with_unknowns(self):
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@ -163,7 +170,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_senders_works_with_literals(self):
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@ -176,7 +183,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_senders_works_with_unknowns(self):
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@ -189,7 +196,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertTrue(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_senders_takes_priority_over_senders(self):
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@ -203,7 +210,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!foo:bar"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_rooms_works_with_literals(self):
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@ -216,7 +223,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!secretbase:unknown"
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)
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self.assertTrue(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_rooms_works_with_unknowns(self):
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@ -229,7 +236,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!anothersecretbase:unknown"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_rooms_works_with_literals(self):
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@ -242,7 +249,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!anothersecretbase:unknown"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_rooms_works_with_unknowns(self):
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@ -255,7 +262,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!anothersecretbase:unknown"
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)
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self.assertTrue(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_not_rooms_takes_priority_over_rooms(self):
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@ -269,7 +276,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!secretbase:unknown"
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_combined_event(self):
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@ -287,7 +294,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!stage:unknown" # yup
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)
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self.assertTrue(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_combined_event_bad_sender(self):
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@ -305,7 +312,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!stage:unknown" # yup
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_combined_event_bad_room(self):
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@ -323,7 +330,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!piggyshouse:muppets" # nope
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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def test_definition_combined_event_bad_type(self):
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@ -341,7 +348,7 @@ class FilteringTestCase(unittest.TestCase):
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room_id="!stage:unknown" # yup
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)
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self.assertFalse(
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self.filter._passes_definition(definition, event)
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Filter(definition).check(event)
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)
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@defer.inlineCallbacks
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@ -359,7 +366,6 @@ class FilteringTestCase(unittest.TestCase):
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event = MockEvent(
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sender="@foo:bar",
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type="m.profile",
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room_id="!foo:bar"
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)
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events = [event]
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@ -386,7 +392,6 @@ class FilteringTestCase(unittest.TestCase):
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event = MockEvent(
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sender="@foo:bar",
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type="custom.avatar.3d.crazy",
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room_id="!foo:bar"
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)
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events = [event]
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|
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