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@ -46,17 +46,17 @@ Room Alias Localparts:
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In the event of a failed user ID check, well behaved homeservers MUST:
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In the event of a failed user ID check, well behaved homeservers MUST:
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- Rewrite user IDs in the offending events to be punycode with an additional ``@``
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- Rewrite user IDs in the offending events to be punycode with an additional ``@``
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prefix **before** delivering them to clients. There are no guarantees for
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prefix **before** delivering them to clients. There are no guarantees for
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consistency between homeserver ID checking implementations. As a result, user
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consistency between homeserver ID checking implementations. As a result, user
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IDs MUST be sent in their *original* form over federation. This can be done in
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IDs MUST be sent in their *original* form over federation. This can be done in
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a stateless manner as the punycode form has no information loss.
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a stateless manner as the punycode form has no information loss.
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In the event of a failed room alias check, well behaved homeservers MUST:
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In the event of a failed room alias check, well behaved homeservers MUST:
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- Send an HTTP status code 400 with an ``errcode`` of ``M_FAILED_HUMAN_ID_CHECK``
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- Send an HTTP status code 400 with an ``errcode`` of ``M_FAILED_HUMAN_ID_CHECK``
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to the client if the client is attempting to *create* this alias.
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to the client if the client is attempting to *create* this alias.
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- Send an HTTP status code 400 with an ``errcode`` of ``M_FAILED_HUMAN_ID_CHECK``
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- Send an HTTP status code 400 with an ``errcode`` of ``M_FAILED_HUMAN_ID_CHECK``
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to the client if the client is attempting to *join* a room via this alias.
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to the client if the client is attempting to *join* a room via this alias.
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Examples::
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Examples::
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@ -98,7 +98,7 @@ Room aliases cannot be rewritten as punycode and sent to the HS the alias is
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referring to as the HS will not necessarily understand the rewritten alias.
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referring to as the HS will not necessarily understand the rewritten alias.
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Other rejected solutions for failed checks
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Other rejected solutions for failed checks
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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------------------------------------------
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- Additional key: Informational key on the event attached by HS to say "unsafe
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- Additional key: Informational key on the event attached by HS to say "unsafe
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ID". Problem: clients can just ignore it, and since it will appear only very
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ID". Problem: clients can just ignore it, and since it will appear only very
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rarely, easy to forget when implementing clients.
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rarely, easy to forget when implementing clients.
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@ -123,4 +123,3 @@ The capitalisation rules outlined above are nice but do not fully resolve issues
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where ``@alice:example.com`` tries to speak with ``@bob:domain.com`` using
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where ``@alice:example.com`` tries to speak with ``@bob:domain.com`` using
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``@Bob:domain.com``. It is up to ``domain.com`` to map ``Bob`` to ``bob`` in
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``@Bob:domain.com``. It is up to ``domain.com`` to map ``Bob`` to ``bob`` in
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a sensible way.
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a sensible way.
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