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@ -48,12 +48,12 @@ https://github.com/matrix-org/matrix-doc/blob/master/changelogs/application_serv
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Application Services
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Application Services
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--------------------
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--------------------
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Application services are passive and can only observe events from a given
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Application services are passive and can only observe events from a given
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homeserver (HS). They can inject events into rooms they are participating in.
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homeserver. They can inject events into rooms they are participating in.
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They cannot prevent events from being sent, nor can they modify the content of
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They cannot prevent events from being sent, nor can they modify the content of
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the event being sent. In order to observe events from a homeserver, the
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the event being sent. In order to observe events from a homeserver, the
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homeserver needs to be configured to pass certain types of traffic to the
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homeserver needs to be configured to pass certain types of traffic to the
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application service. This is achieved by manually configuring the homeserver
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application service. This is achieved by manually configuring the homeserver
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with information about the application service (AS).
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with information about the application service.
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Registration
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Registration
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~~~~~~~~~~~~
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~~~~~~~~~~~~
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@ -187,24 +187,24 @@ events. Each list of events includes a transaction ID, which works as follows:
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Typical
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Typical
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HS ---> AS : Homeserver sends events with transaction ID T.
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HS ---> AS : Homeserver sends events with transaction ID T.
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<--- : AS sends back 200 OK.
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<--- : Application Service sends back 200 OK.
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AS ACK Lost
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AS ACK Lost
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HS ---> AS : Homeserver sends events with transaction ID T.
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HS ---> AS : Homeserver sends events with transaction ID T.
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<-/- : AS 200 OK is lost.
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<-/- : AS 200 OK is lost.
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HS ---> AS : Homeserver retries with the same transaction ID of T.
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HS ---> AS : Homeserver retries with the same transaction ID of T.
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<--- : AS sends back 200 OK. If the AS had processed these events
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<--- : Application Service sends back 200 OK. If the AS had processed these
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already, it can NO-OP this request (and it knows if it is the same
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events already, it can NO-OP this request (and it knows if it is the
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events based on the transaction ID).
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same events based on the transaction ID).
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The events sent to the application service should be linearised, as if they were
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The events sent to the application service should be linearised, as if they were
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from the event stream. The homeserver MUST maintain a queue of transactions to
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from the event stream. The homeserver MUST maintain a queue of transactions to
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send to the AS. If the application service cannot be reached, the homeserver
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send to the application service. If the application service cannot be reached, the
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SHOULD backoff exponentially until the application service is reachable again.
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homeserver SHOULD backoff exponentially until the application service is reachable again.
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As application services cannot *modify* the events in any way, these requests can
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As application services cannot *modify* the events in any way, these requests can
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be made without blocking other aspects of the homeserver. Homeservers MUST NOT
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be made without blocking other aspects of the homeserver. Homeservers MUST NOT
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alter (e.g. add more) events they were going to send within that transaction ID
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alter (e.g. add more) events they were going to send within that transaction ID
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on retries, as the AS may have already processed the events.
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on retries, as the application service may have already processed the events.
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{{transactions_as_http_api}}
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{{transactions_as_http_api}}
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@ -334,7 +334,7 @@ users needs API changes in order to:
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- Have a 'passwordless' user.
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- Have a 'passwordless' user.
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This involves bypassing the registration flows entirely. This is achieved by
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This involves bypassing the registration flows entirely. This is achieved by
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including the AS token on a ``/register`` request, along with a login type of
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including the ``as_token`` on a ``/register`` request, along with a login type of
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``m.login.application_service`` to set the desired user ID without a password.
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``m.login.application_service`` to set the desired user ID without a password.
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::
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::
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@ -374,8 +374,6 @@ additional parameters on the ``/publicRooms`` client-server endpoint.
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Event fields
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Event fields
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~~~~~~~~~~~~
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~~~~~~~~~~~~
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.. TODO-TravisR: Fix this section to be a general "3rd party networks" section
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We recommend that any events that originated from a remote network should
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We recommend that any events that originated from a remote network should
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include an ``external_url`` field in their content to provide a way for Matrix
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include an ``external_url`` field in their content to provide a way for Matrix
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clients to link into the 'native' client from which the event originated.
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clients to link into the 'native' client from which the event originated.
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