diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/events/utils.py | 61 | ||||
| -rw-r--r-- | synapse/handlers/room.py | 14 |
2 files changed, 53 insertions, 22 deletions
diff --git a/synapse/events/utils.py b/synapse/events/utils.py index 026dcde8d8..ac91c5eb57 100644 --- a/synapse/events/utils.py +++ b/synapse/events/utils.py @@ -22,6 +22,7 @@ from typing import ( Iterable, List, Mapping, + MutableMapping, Optional, Union, ) @@ -580,10 +581,20 @@ class EventClientSerializer: ] -def copy_power_levels_contents( - old_power_levels: Mapping[str, Union[int, Mapping[str, int]]] +_PowerLevel = Union[str, int] + + +def copy_and_fixup_power_levels_contents( + old_power_levels: Mapping[str, Union[_PowerLevel, Mapping[str, _PowerLevel]]] ) -> Dict[str, Union[int, Dict[str, int]]]: - """Copy the content of a power_levels event, unfreezing frozendicts along the way + """Copy the content of a power_levels event, unfreezing frozendicts along the way. + + We accept as input power level values which are strings, provided they represent an + integer, e.g. `"`100"` instead of 100. Such strings are converted to integers + in the returned dictionary (hence "fixup" in the function name). + + Note that future room versions will outlaw such stringy power levels (see + https://github.com/matrix-org/matrix-spec/issues/853). Raises: TypeError if the input does not look like a valid power levels event content @@ -592,29 +603,47 @@ def copy_power_levels_contents( raise TypeError("Not a valid power-levels content: %r" % (old_power_levels,)) power_levels: Dict[str, Union[int, Dict[str, int]]] = {} - for k, v in old_power_levels.items(): - - if isinstance(v, int): - power_levels[k] = v - continue + for k, v in old_power_levels.items(): if isinstance(v, collections.abc.Mapping): h: Dict[str, int] = {} power_levels[k] = h for k1, v1 in v.items(): - # we should only have one level of nesting - if not isinstance(v1, int): - raise TypeError( - "Invalid power_levels value for %s.%s: %r" % (k, k1, v1) - ) - h[k1] = v1 - continue + _copy_power_level_value_as_integer(v1, h, k1) - raise TypeError("Invalid power_levels value for %s: %r" % (k, v)) + else: + _copy_power_level_value_as_integer(v, power_levels, k) return power_levels +def _copy_power_level_value_as_integer( + old_value: object, + power_levels: MutableMapping[str, Any], + key: str, +) -> None: + """Set `power_levels[key]` to the integer represented by `old_value`. + + :raises TypeError: if `old_value` is not an integer, nor a base-10 string + representation of an integer. + """ + if isinstance(old_value, int): + power_levels[key] = old_value + return + + if isinstance(old_value, str): + try: + parsed_value = int(old_value, base=10) + except ValueError: + # Fall through to the final TypeError. + pass + else: + power_levels[key] = parsed_value + return + + raise TypeError(f"Invalid power_levels value for {key}: {old_value}") + + def validate_canonicaljson(value: Any) -> None: """ Ensure that the JSON object is valid according to the rules of canonical JSON. diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py index b31f00b517..604eb6ec15 100644 --- a/synapse/handlers/room.py +++ b/synapse/handlers/room.py @@ -57,7 +57,7 @@ from synapse.api.filtering import Filter from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersion from synapse.event_auth import validate_event_for_room_version from synapse.events import EventBase -from synapse.events.utils import copy_power_levels_contents +from synapse.events.utils import copy_and_fixup_power_levels_contents from synapse.federation.federation_client import InvalidResponseError from synapse.handlers.federation import get_domains_from_state from synapse.handlers.relations import BundledAggregations @@ -337,13 +337,13 @@ class RoomCreationHandler: # 50, but if the default PL in a room is 50 or more, then we set the # required PL above that. - pl_content = dict(old_room_pl_state.content) - users_default = int(pl_content.get("users_default", 0)) + pl_content = copy_and_fixup_power_levels_contents(old_room_pl_state.content) + users_default: int = pl_content.get("users_default", 0) # type: ignore[assignment] restricted_level = max(users_default + 1, 50) updated = False for v in ("invite", "events_default"): - current = int(pl_content.get(v, 0)) + current: int = pl_content.get(v, 0) # type: ignore[assignment] if current < restricted_level: logger.debug( "Setting level for %s in %s to %i (was %i)", @@ -380,7 +380,9 @@ class RoomCreationHandler: "state_key": "", "room_id": new_room_id, "sender": requester.user.to_string(), - "content": old_room_pl_state.content, + "content": copy_and_fixup_power_levels_contents( + old_room_pl_state.content + ), }, ratelimit=False, ) @@ -471,7 +473,7 @@ class RoomCreationHandler: # dict so we can't just copy.deepcopy it. initial_state[ (EventTypes.PowerLevels, "") - ] = power_levels = copy_power_levels_contents( + ] = power_levels = copy_and_fixup_power_levels_contents( initial_state[(EventTypes.PowerLevels, "")] ) |