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Check if instances are lists, not sequences. (#12128)
As a str is a sequence, the checks were not granular enough and would allow lists or strings, when only lists were valid.
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changelog.d/12128.misc
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1
changelog.d/12128.misc
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@ -0,0 +1 @@
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Fix data validation to compare to lists, not sequences.
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@ -1428,7 +1428,7 @@ class FederationClient(FederationBase):
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# Validate children_state of the room.
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children_state = room.pop("children_state", [])
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if not isinstance(children_state, Sequence):
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if not isinstance(children_state, list):
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raise InvalidResponseError("'room.children_state' must be a list")
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if any(not isinstance(e, dict) for e in children_state):
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raise InvalidResponseError("Invalid event in 'children_state' list")
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@ -1440,14 +1440,14 @@ class FederationClient(FederationBase):
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# Validate the children rooms.
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children = res.get("children", [])
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if not isinstance(children, Sequence):
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if not isinstance(children, list):
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raise InvalidResponseError("'children' must be a list")
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if any(not isinstance(r, dict) for r in children):
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raise InvalidResponseError("Invalid room in 'children' list")
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# Validate the inaccessible children.
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inaccessible_children = res.get("inaccessible_children", [])
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if not isinstance(inaccessible_children, Sequence):
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if not isinstance(inaccessible_children, list):
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raise InvalidResponseError("'inaccessible_children' must be a list")
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if any(not isinstance(r, str) for r in inaccessible_children):
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raise InvalidResponseError(
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@ -1630,7 +1630,7 @@ def _validate_hierarchy_event(d: JsonDict) -> None:
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raise ValueError("Invalid event: 'content' must be a dict")
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via = content.get("via")
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if not isinstance(via, Sequence):
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if not isinstance(via, list):
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raise ValueError("Invalid event: 'via' must be a list")
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if any(not isinstance(v, str) for v in via):
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raise ValueError("Invalid event: 'via' must be a list of strings")
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@ -857,7 +857,7 @@ class _RoomEntry:
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def _has_valid_via(e: EventBase) -> bool:
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via = e.content.get("via")
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if not via or not isinstance(via, Sequence):
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if not via or not isinstance(via, list):
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return False
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for v in via:
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if not isinstance(v, str):
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