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Implement per-room message retention policies

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Brendan Abolivier 2019-11-04 17:09:22 +00:00
parent f496d25877
commit 09957ce0e4
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13 changed files with 1074 additions and 6 deletions
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100
synapse/events/validator.py
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@ -13,7 +13,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from six import string_types
from six import integer_types, string_types
from synapse.api.constants import MAX_ALIAS_LENGTH, EventTypes, Membership
from synapse.api.errors import Codes, SynapseError
@ -22,11 +22,12 @@ from synapse.types import EventID, RoomID, UserID
class EventValidator(object):
def validate_new(self, event):
def validate_new(self, event, config):
"""Validates the event has roughly the right format
Args:
event (FrozenEvent)
event (FrozenEvent): The event to validate.
config (Config): The homeserver's configuration.
"""
self.validate_builder(event)
@ -67,6 +68,99 @@ class EventValidator(object):
Codes.INVALID_PARAM,
)
if event.type == EventTypes.Retention:
self._validate_retention(event, config)
def _validate_retention(self, event, config):
"""Checks that an event that defines the retention policy for a room respects the
boundaries imposed by the server's administrator.
Args:
event (FrozenEvent): The event to validate.
config (Config): The homeserver's configuration.
"""
min_lifetime = event.content.get("min_lifetime")
max_lifetime = event.content.get("max_lifetime")
if min_lifetime is not None:
if not isinstance(min_lifetime, integer_types):
raise SynapseError(
code=400,
msg="'min_lifetime' must be an integer",
errcode=Codes.BAD_JSON,
)
if (
config.retention_allowed_lifetime_min is not None
and min_lifetime < config.retention_allowed_lifetime_min
):
raise SynapseError(
code=400,
msg=(
"'min_lifetime' can't be lower than the minimum allowed"
" value enforced by the server's administrator"
),
errcode=Codes.BAD_JSON,
)
if (
config.retention_allowed_lifetime_max is not None
and min_lifetime > config.retention_allowed_lifetime_max
):
raise SynapseError(
code=400,
msg=(
"'min_lifetime' can't be greater than the maximum allowed"
" value enforced by the server's administrator"
),
errcode=Codes.BAD_JSON,
)
if max_lifetime is not None:
if not isinstance(max_lifetime, integer_types):
raise SynapseError(
code=400,
msg="'max_lifetime' must be an integer",
errcode=Codes.BAD_JSON,
)
if (
config.retention_allowed_lifetime_min is not None
and max_lifetime < config.retention_allowed_lifetime_min
):
raise SynapseError(
code=400,
msg=(
"'max_lifetime' can't be lower than the minimum allowed value"
" enforced by the server's administrator"
),
errcode=Codes.BAD_JSON,
)
if (
config.retention_allowed_lifetime_max is not None
and max_lifetime > config.retention_allowed_lifetime_max
):
raise SynapseError(
code=400,
msg=(
"'max_lifetime' can't be greater than the maximum allowed"
" value enforced by the server's administrator"
),
errcode=Codes.BAD_JSON,
)
if (
min_lifetime is not None
and max_lifetime is not None
and min_lifetime > max_lifetime
):
raise SynapseError(
code=400,
msg="'min_lifetime' can't be greater than 'max_lifetime",
errcode=Codes.BAD_JSON,
)
def validate_builder(self, event):
"""Validates that the builder/event has roughly the right format. Only
checks values that we expect a proto event to have, rather than all the