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improvement: only remove to-device events when sure the client received them
To make this work, I had to remove the recommended limit of 100 to-device events per /sync (https://matrix.org/docs/spec/client_server/latest#id72)
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parent
678f33acf9
commit
16576d19cd
2 changed files with 43 additions and 8 deletions
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@ -2659,6 +2659,9 @@ pub fn sync_route(
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}
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}
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// Remove all to-device events the device received *last time*
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db.users.remove_to_device_events(user_id, device_id, since)?;
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Ok(sync_events::Response {
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next_batch,
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rooms: sync_events::Rooms {
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@ -2711,7 +2714,7 @@ pub fn sync_route(
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},
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device_one_time_keys_count: Default::default(), // TODO
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to_device: sync_events::ToDevice {
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events: db.users.take_to_device_events(user_id, device_id, 100)?,
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events: db.users.get_to_device_events(user_id, device_id)?,
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},
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}
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.into())
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@ -11,7 +11,7 @@ use ruma::{
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events::{AnyToDeviceEvent, EventJson, EventType},
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identifiers::{DeviceId, UserId},
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};
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use std::{collections::BTreeMap, convert::TryFrom, time::SystemTime};
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use std::{collections::BTreeMap, convert::TryFrom, mem, time::SystemTime};
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pub struct Users {
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pub(super) userid_password: sled::Tree,
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@ -660,11 +660,10 @@ impl Users {
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Ok(())
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}
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pub fn take_to_device_events(
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pub fn get_to_device_events(
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&self,
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user_id: &UserId,
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device_id: &DeviceId,
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max: usize,
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) -> Result<Vec<EventJson<AnyToDeviceEvent>>> {
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let mut events = Vec::new();
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@ -673,18 +672,51 @@ impl Users {
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prefix.extend_from_slice(device_id.as_str().as_bytes());
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prefix.push(0xff);
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for result in self.todeviceid_events.scan_prefix(&prefix).take(max) {
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let (key, value) = result?;
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for value in self.todeviceid_events.scan_prefix(&prefix).values() {
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events.push(
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serde_json::from_slice(&*value)
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serde_json::from_slice(&*value?)
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.map_err(|_| Error::bad_database("Event in todeviceid_events is invalid."))?,
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);
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self.todeviceid_events.remove(key)?;
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}
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Ok(events)
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}
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pub fn remove_to_device_events(
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&self,
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user_id: &UserId,
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device_id: &DeviceId,
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until: u64,
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) -> Result<()> {
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let mut prefix = user_id.to_string().as_bytes().to_vec();
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prefix.push(0xff);
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prefix.extend_from_slice(device_id.as_ref().as_bytes());
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prefix.push(0xff);
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let mut last = prefix.clone();
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last.extend_from_slice(&until.to_be_bytes());
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for (key, _) in self
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.todeviceid_events
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.range(&*prefix..=&*last)
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.keys()
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.map(|key| {
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let key = key?;
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Ok::<_, Error>((
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key.clone(),
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utils::u64_from_bytes(&key[key.len() - mem::size_of::<u64>()..key.len()])
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.map_err(|_| Error::bad_database("ToDeviceId has invalid count bytes."))?,
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))
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})
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.filter_map(|r| r.ok())
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.take_while(|&(_, count)| count <= until)
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{
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self.todeviceid_events.remove(key)?;
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}
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Ok(())
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}
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pub fn update_device_metadata(
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&self,
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user_id: &UserId,
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