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Avoid broadcasting SaveBuffer in response to a client's save request

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The host will send a `SaveBuffer` message anyway and this prevents re-querying
the database, which could cause two `BufferSaved` messages to race and, as a
result, cause guest to apply them in the wrong order.
This commit is contained in:
Antonio Scandurra 2023-04-10 10:02:13 +02:00
parent 3a82c04248
commit 9761febf82
1 changed files with 1 additions and 46 deletions
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47
crates/collab/src/rpc.rs
View file

@ -228,7 +228,7 @@ impl Server {
.add_message_handler(update_buffer_file)
.add_message_handler(buffer_reloaded)
.add_message_handler(buffer_saved)
.add_request_handler(save_buffer)
.add_request_handler(forward_project_request::<proto::SaveBuffer>)
.add_request_handler(get_users)
.add_request_handler(fuzzy_search_users)
.add_request_handler(request_contact)
@ -1591,51 +1591,6 @@ where
Ok(())
}
async fn save_buffer(
request: proto::SaveBuffer,
response: Response<proto::SaveBuffer>,
session: Session,
) -> Result<()> {
let project_id = ProjectId::from_proto(request.project_id);
let host_connection_id = {
let collaborators = session
.db()
.await
.project_collaborators(project_id, session.connection_id)
.await?;
collaborators
.iter()
.find(|collaborator| collaborator.is_host)
.ok_or_else(|| anyhow!("host not found"))?
.connection_id
};
let response_payload = session
.peer
.forward_request(session.connection_id, host_connection_id, request.clone())
.await?;
let mut collaborators = session
.db()
.await
.project_collaborators(project_id, session.connection_id)
.await?;
collaborators.retain(|collaborator| collaborator.connection_id != session.connection_id);
let project_connection_ids = collaborators
.iter()
.map(|collaborator| collaborator.connection_id);
broadcast(
Some(host_connection_id),
project_connection_ids,
|conn_id| {
session
.peer
.forward_send(host_connection_id, conn_id, response_payload.clone())
},
);
response.send(response_payload)?;
Ok(())
}
async fn create_buffer_for_peer(
request: proto::CreateBufferForPeer,
session: Session,