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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 2015-10-22 13:17:10 +01:00
parent c9c82e8f4d 87deec824a
commit b0ac0a9438
3 changed files with 104 additions and 137 deletions
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178
synapse/api/filtering.py
View File

@ -24,7 +24,7 @@ class Filtering(object):
def get_user_filter(self, user_localpart, filter_id):
result = self.store.get_user_filter(user_localpart, filter_id)
result.addCallback(Filter)
result.addCallback(FilterCollection)
return result
def add_user_filter(self, user_localpart, user_filter):
@ -131,125 +131,87 @@ class Filtering(object):
raise SynapseError(400, "Bad bundle_updates: expected bool.")
class FilterCollection(object):
def __init__(self, filter_json):
self.filter_json = filter_json
self.room_timeline_filter = Filter(
self.filter_json.get("room", {}).get("timeline", {})
)
self.room_state_filter = Filter(
self.filter_json.get("room", {}).get("state", {})
)
self.room_ephemeral_filter = Filter(
self.filter_json.get("room", {}).get("ephemeral", {})
)
self.presence_filter = Filter(
self.filter_json.get("presence", {})
)
def timeline_limit(self):
return self.room_timeline_filter.limit()
def presence_limit(self):
return self.presence_filter.limit()
def ephemeral_limit(self):
return self.room_ephemeral_filter.limit()
def filter_presence(self, events):
return self.presence_filter.filter(events)
def filter_room_state(self, events):
return self.room_state_filter.filter(events)
def filter_room_timeline(self, events):
return self.room_timeline_filter.filter(events)
def filter_room_ephemeral(self, events):
return self.room_ephemeral_filter.filter(events)
class Filter(object):
def __init__(self, filter_json):
self.filter_json = filter_json
def timeline_limit(self):
return self.filter_json.get("room", {}).get("timeline", {}).get("limit", 10)
def check(self, event):
"""Checks whether the filter matches the given event.
def presence_limit(self):
return self.filter_json.get("presence", {}).get("limit", 10)
def ephemeral_limit(self):
return self.filter_json.get("room", {}).get("ephemeral", {}).get("limit", 10)
def filter_presence(self, events):
return self._filter_on_key(events, ["presence"])
def filter_room_state(self, events):
return self._filter_on_key(events, ["room", "state"])
def filter_room_timeline(self, events):
return self._filter_on_key(events, ["room", "timeline"])
def filter_room_ephemeral(self, events):
return self._filter_on_key(events, ["room", "ephemeral"])
def _filter_on_key(self, events, keys):
filter_json = self.filter_json
if not filter_json:
return events
try:
# extract the right definition from the filter
definition = filter_json
for key in keys:
definition = definition[key]
return self._filter_with_definition(events, definition)
except KeyError:
# return all events if definition isn't specified.
return events
def _filter_with_definition(self, events, definition):
return [e for e in events if self._passes_definition(definition, e)]
def _passes_definition(self, definition, event):
"""Check if the event passes the filter definition
Args:
definition(dict): The filter definition to check against
event(dict or Event): The event to check
Returns:
True if the event passes the filter in the definition
bool: True if the event matches
"""
if type(event) is dict:
room_id = event.get("room_id")
sender = event.get("sender")
event_type = event["type"]
else:
room_id = getattr(event, "room_id", None)
sender = getattr(event, "sender", None)
event_type = event.type
return self._event_passes_definition(
definition, room_id, sender, event_type
)
literal_keys = {
"rooms": lambda v: event.room_id == v,
"senders": lambda v: event.sender == v,
"types": lambda v: _matches_wildcard(event.type, v)
}
def _event_passes_definition(self, definition, room_id, sender,
event_type):
"""Check if the event passes through the given definition.
Args:
definition(dict): The definition to check against.
room_id(str): The id of the room this event is in or None.
sender(str): The sender of the event
event_type(str): The type of the event.
Returns:
True if the event passes through the filter.
"""
# Algorithm notes:
# For each key in the definition, check the event meets the criteria:
# * For types: Literal match or prefix match (if ends with wildcard)
# * For senders/rooms: Literal match only
# * "not_" checks take presedence (e.g. if "m.*" is in both 'types'
# and 'not_types' then it is treated as only being in 'not_types')
# room checks
if room_id is not None:
allow_rooms = definition.get("rooms", None)
reject_rooms = definition.get("not_rooms", None)
if reject_rooms and room_id in reject_rooms:
return False
if allow_rooms and room_id not in allow_rooms:
for name, match_func in literal_keys.items():
not_name = "not_%s" % (name,)
disallowed_values = self.filter_json.get(not_name, [])
if any(map(match_func, disallowed_values)):
return False
# sender checks
if sender is not None:
allow_senders = definition.get("senders", None)
reject_senders = definition.get("not_senders", None)
if reject_senders and sender in reject_senders:
return False
if allow_senders and sender not in allow_senders:
return False
# type checks
if "not_types" in definition:
for def_type in definition["not_types"]:
if self._event_matches_type(event_type, def_type):
return False
if "types" in definition:
included = False
for def_type in definition["types"]:
if self._event_matches_type(event_type, def_type):
included = True
break
if not included:
allowed_values = self.filter_json.get(name, None)
if allowed_values is not None:
if not any(map(match_func, allowed_values)):
return False
return True
def _event_matches_type(self, event_type, def_type):
if def_type.endswith("*"):
type_prefix = def_type[:-1]
return event_type.startswith(type_prefix)
def filter(self, events):
return filter(self.check, events)
def limit(self):
return self.filter_json.get("limit", 10)
def _matches_wildcard(actual_value, filter_value):
if filter_value.endswith("*"):
type_prefix = filter_value[:-1]
return actual_value.startswith(type_prefix)
else:
return event_type == def_type
return actual_value == filter_value

4
synapse/rest/client/v2_alpha/sync.py
View File

@ -23,7 +23,7 @@ from synapse.types import StreamToken
from synapse.events.utils import (
serialize_event, format_event_for_client_v2_without_event_id,
)
from synapse.api.filtering import Filter
from synapse.api.filtering import FilterCollection
from ._base import client_v2_pattern
import copy
@ -103,7 +103,7 @@ class SyncRestServlet(RestServlet):
user.localpart, filter_id
)
except:
filter = Filter({})
filter = FilterCollection({})
sync_config = SyncConfig(
user=user,

57
tests/api/test_filtering.py
View File

@ -23,10 +23,17 @@ from tests.utils import (
)
from synapse.types import UserID
from synapse.api.filtering import Filter
from synapse.api.filtering import FilterCollection, Filter
user_localpart = "test_user"
MockEvent = namedtuple("MockEvent", "sender type room_id")
# MockEvent = namedtuple("MockEvent", "sender type room_id")
def MockEvent(**kwargs):
ev = NonCallableMock(spec_set=kwargs.keys())
ev.configure_mock(**kwargs)
return ev
class FilteringTestCase(unittest.TestCase):
@ -44,7 +51,6 @@ class FilteringTestCase(unittest.TestCase):
)
self.filtering = hs.get_filtering()
self.filter = Filter({})
self.datastore = hs.get_datastore()
@ -57,8 +63,9 @@ class FilteringTestCase(unittest.TestCase):
type="m.room.message",
room_id="!foo:bar"
)
self.assertTrue(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_types_works_with_wildcards(self):
@ -71,7 +78,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertTrue(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_types_works_with_unknowns(self):
@ -84,7 +91,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_types_works_with_literals(self):
@ -97,7 +104,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_types_works_with_wildcards(self):
@ -110,7 +117,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_types_works_with_unknowns(self):
@ -123,7 +130,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertTrue(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_types_takes_priority_over_types(self):
@ -137,7 +144,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_senders_works_with_literals(self):
@ -150,7 +157,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertTrue(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_senders_works_with_unknowns(self):
@ -163,7 +170,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_senders_works_with_literals(self):
@ -176,7 +183,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_senders_works_with_unknowns(self):
@ -189,7 +196,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertTrue(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_senders_takes_priority_over_senders(self):
@ -203,7 +210,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!foo:bar"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_rooms_works_with_literals(self):
@ -216,7 +223,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!secretbase:unknown"
)
self.assertTrue(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_rooms_works_with_unknowns(self):
@ -229,7 +236,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!anothersecretbase:unknown"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_rooms_works_with_literals(self):
@ -242,7 +249,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!anothersecretbase:unknown"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_rooms_works_with_unknowns(self):
@ -255,7 +262,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!anothersecretbase:unknown"
)
self.assertTrue(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_not_rooms_takes_priority_over_rooms(self):
@ -269,7 +276,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!secretbase:unknown"
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_combined_event(self):
@ -287,7 +294,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!stage:unknown" # yup
)
self.assertTrue(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_combined_event_bad_sender(self):
@ -305,7 +312,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!stage:unknown" # yup
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_combined_event_bad_room(self):
@ -323,7 +330,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!piggyshouse:muppets" # nope
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
def test_definition_combined_event_bad_type(self):
@ -341,7 +348,7 @@ class FilteringTestCase(unittest.TestCase):
room_id="!stage:unknown" # yup
)
self.assertFalse(
self.filter._passes_definition(definition, event)
Filter(definition).check(event)
)
@defer.inlineCallbacks
@ -359,7 +366,6 @@ class FilteringTestCase(unittest.TestCase):
event = MockEvent(
sender="@foo:bar",
type="m.profile",
room_id="!foo:bar"
)
events = [event]
@ -386,7 +392,6 @@ class FilteringTestCase(unittest.TestCase):
event = MockEvent(
sender="@foo:bar",
type="custom.avatar.3d.crazy",
room_id="!foo:bar"
)
events = [event]