Clarify the meaning of "public rooms" for profile look-ups (#2101)

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Johannes Marbach 2025-05-13 15:34:39 +02:00 committed by GitHub
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"Public" rooms in profile look-ups are defined through their join rule and history visibility.

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#### Server behaviour #### Server behaviour
Homeservers MUST at a minimum allow profile look-up for: Homeservers MUST at a minimum allow profile look-up for users who are
visible to the requester based on their membership in rooms known to the
homeserver. This means:
- users that share a room with the requesting user - users that share a room with the requesting user
- users that reside in public rooms known to the homeserver - users who are joined to rooms known to the homeserver that have a
`public` [join rule](#mroomjoin_rules)
- users who are joined to rooms known to the homeserver that have a
`world_readable` [history visibility](#room-history-visibility)
In all other cases, homeservers MAY deny profile look-up by responding with In all other cases, homeservers MAY deny profile look-up by responding with
403 and an error code of `M_FORBIDDEN`. 403 and an error code of `M_FORBIDDEN`.