138 lines
4.2 KiB
Go
138 lines
4.2 KiB
Go
// Copyright 2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package consumers
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/Shopify/sarama"
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stateapi "github.com/matrix-org/dendrite/currentstateserver/api"
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"github.com/matrix-org/dendrite/federationsender/queue"
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"github.com/matrix-org/dendrite/federationsender/storage"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/internal/config"
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"github.com/matrix-org/dendrite/keyserver/api"
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"github.com/matrix-org/gomatrixserverlib"
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log "github.com/sirupsen/logrus"
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)
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// KeyChangeConsumer consumes events that originate in key server.
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type KeyChangeConsumer struct {
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consumer *internal.ContinualConsumer
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db storage.Database
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queues *queue.OutgoingQueues
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serverName gomatrixserverlib.ServerName
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stateAPI stateapi.CurrentStateInternalAPI
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}
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// NewKeyChangeConsumer creates a new KeyChangeConsumer. Call Start() to begin consuming from key servers.
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func NewKeyChangeConsumer(
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cfg *config.KeyServer,
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kafkaConsumer sarama.Consumer,
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queues *queue.OutgoingQueues,
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store storage.Database,
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stateAPI stateapi.CurrentStateInternalAPI,
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) *KeyChangeConsumer {
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c := &KeyChangeConsumer{
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consumer: &internal.ContinualConsumer{
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Topic: string(cfg.Matrix.Kafka.TopicFor(config.TopicOutputKeyChangeEvent)),
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Consumer: kafkaConsumer,
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PartitionStore: store,
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},
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queues: queues,
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db: store,
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serverName: cfg.Matrix.ServerName,
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stateAPI: stateAPI,
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}
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c.consumer.ProcessMessage = c.onMessage
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return c
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}
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// Start consuming from key servers
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func (t *KeyChangeConsumer) Start() error {
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if err := t.consumer.Start(); err != nil {
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return fmt.Errorf("t.consumer.Start: %w", err)
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}
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return nil
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}
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// onMessage is called in response to a message received on the
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// key change events topic from the key server.
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func (t *KeyChangeConsumer) onMessage(msg *sarama.ConsumerMessage) error {
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var m api.DeviceMessage
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if err := json.Unmarshal(msg.Value, &m); err != nil {
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log.WithError(err).Errorf("failed to read device message from key change topic")
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return nil
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}
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logger := log.WithField("user_id", m.UserID)
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// only send key change events which originated from us
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_, originServerName, err := gomatrixserverlib.SplitID('@', m.UserID)
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if err != nil {
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logger.WithError(err).Error("Failed to extract domain from key change event")
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return nil
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}
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if originServerName != t.serverName {
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return nil
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}
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var queryRes stateapi.QueryRoomsForUserResponse
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err = t.stateAPI.QueryRoomsForUser(context.Background(), &stateapi.QueryRoomsForUserRequest{
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UserID: m.UserID,
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WantMembership: "join",
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}, &queryRes)
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if err != nil {
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logger.WithError(err).Error("failed to calculate joined rooms for user")
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return nil
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}
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// send this key change to all servers who share rooms with this user.
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destinations, err := t.db.GetJoinedHostsForRooms(context.Background(), queryRes.RoomIDs)
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if err != nil {
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logger.WithError(err).Error("failed to calculate joined hosts for rooms user is in")
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return nil
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}
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// Pack the EDU and marshal it
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edu := &gomatrixserverlib.EDU{
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Type: gomatrixserverlib.MDeviceListUpdate,
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Origin: string(t.serverName),
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}
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event := gomatrixserverlib.DeviceListUpdateEvent{
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UserID: m.UserID,
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DeviceID: m.DeviceID,
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DeviceDisplayName: m.DisplayName,
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StreamID: m.StreamID,
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PrevID: prevID(m.StreamID),
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Deleted: len(m.KeyJSON) == 0,
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Keys: m.KeyJSON,
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}
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if edu.Content, err = json.Marshal(event); err != nil {
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return err
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}
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log.Infof("Sending device list update message to %q", destinations)
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return t.queues.SendEDU(edu, t.serverName, destinations)
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}
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func prevID(streamID int) []int {
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if streamID <= 1 {
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return nil
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}
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return []int{streamID - 1}
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}
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