mirror of
https://github.com/matrix-org/dendrite
synced 2024-09-08 04:05:42 +02:00
* Check membership of room * Use QueryStateAfterEventsResponse * Fix complexity * Changes that I made a long time ago * Rename to appserviceJoinedAtEvent * Check membership in GetMemberships * Update QueryMembershipsForRoom * Tweaks in client API * Update appserviceJoinedAtEvent * Comments * Try QueryMembershipForUser instead * Undo some changes to client API that shouldn't be needed * More /event tweaks * Refactor /event bit * Go back to QueryMembershipsForRoom because appservices are hard * Fix bugs in onMessage * Add comments Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
200 lines
7.1 KiB
Go
200 lines
7.1 KiB
Go
// Copyright 2018 Vector Creations Ltd
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package consumers
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
|
|
"github.com/matrix-org/dendrite/appservice/storage"
|
|
"github.com/matrix-org/dendrite/appservice/types"
|
|
"github.com/matrix-org/dendrite/internal"
|
|
"github.com/matrix-org/dendrite/roomserver/api"
|
|
"github.com/matrix-org/dendrite/setup/config"
|
|
"github.com/matrix-org/dendrite/setup/process"
|
|
"github.com/matrix-org/gomatrixserverlib"
|
|
|
|
"github.com/Shopify/sarama"
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
// OutputRoomEventConsumer consumes events that originated in the room server.
|
|
type OutputRoomEventConsumer struct {
|
|
roomServerConsumer *internal.ContinualConsumer
|
|
asDB storage.Database
|
|
rsAPI api.RoomserverInternalAPI
|
|
serverName string
|
|
workerStates []types.ApplicationServiceWorkerState
|
|
}
|
|
|
|
// NewOutputRoomEventConsumer creates a new OutputRoomEventConsumer. Call
|
|
// Start() to begin consuming from room servers.
|
|
func NewOutputRoomEventConsumer(
|
|
process *process.ProcessContext,
|
|
cfg *config.Dendrite,
|
|
kafkaConsumer sarama.Consumer,
|
|
appserviceDB storage.Database,
|
|
rsAPI api.RoomserverInternalAPI,
|
|
workerStates []types.ApplicationServiceWorkerState,
|
|
) *OutputRoomEventConsumer {
|
|
consumer := internal.ContinualConsumer{
|
|
Process: process,
|
|
ComponentName: "appservice/roomserver",
|
|
Topic: cfg.Global.Kafka.TopicFor(config.TopicOutputRoomEvent),
|
|
Consumer: kafkaConsumer,
|
|
PartitionStore: appserviceDB,
|
|
}
|
|
s := &OutputRoomEventConsumer{
|
|
roomServerConsumer: &consumer,
|
|
asDB: appserviceDB,
|
|
rsAPI: rsAPI,
|
|
serverName: string(cfg.Global.ServerName),
|
|
workerStates: workerStates,
|
|
}
|
|
consumer.ProcessMessage = s.onMessage
|
|
|
|
return s
|
|
}
|
|
|
|
// Start consuming from room servers
|
|
func (s *OutputRoomEventConsumer) Start() error {
|
|
return s.roomServerConsumer.Start()
|
|
}
|
|
|
|
// onMessage is called when the appservice component receives a new event from
|
|
// the room server output log.
|
|
func (s *OutputRoomEventConsumer) onMessage(msg *sarama.ConsumerMessage) error {
|
|
// Parse out the event JSON
|
|
var output api.OutputEvent
|
|
if err := json.Unmarshal(msg.Value, &output); err != nil {
|
|
// If the message was invalid, log it and move on to the next message in the stream
|
|
log.WithError(err).Errorf("roomserver output log: message parse failure")
|
|
return nil
|
|
}
|
|
|
|
if output.Type != api.OutputTypeNewRoomEvent {
|
|
return nil
|
|
}
|
|
|
|
events := []*gomatrixserverlib.HeaderedEvent{output.NewRoomEvent.Event}
|
|
events = append(events, output.NewRoomEvent.AddStateEvents...)
|
|
|
|
// Send event to any relevant application services
|
|
return s.filterRoomserverEvents(context.TODO(), events)
|
|
}
|
|
|
|
// filterRoomserverEvents takes in events and decides whether any of them need
|
|
// to be passed on to an external application service. It does this by checking
|
|
// each namespace of each registered application service, and if there is a
|
|
// match, adds the event to the queue for events to be sent to a particular
|
|
// application service.
|
|
func (s *OutputRoomEventConsumer) filterRoomserverEvents(
|
|
ctx context.Context,
|
|
events []*gomatrixserverlib.HeaderedEvent,
|
|
) error {
|
|
for _, ws := range s.workerStates {
|
|
for _, event := range events {
|
|
// Check if this event is interesting to this application service
|
|
if s.appserviceIsInterestedInEvent(ctx, event, ws.AppService) {
|
|
// Queue this event to be sent off to the application service
|
|
if err := s.asDB.StoreEvent(ctx, ws.AppService.ID, event); err != nil {
|
|
log.WithError(err).Warn("failed to insert incoming event into appservices database")
|
|
return err
|
|
} else {
|
|
// Tell our worker to send out new messages by updating remaining message
|
|
// count and waking them up with a broadcast
|
|
ws.NotifyNewEvents()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// appserviceJoinedAtEvent returns a boolean depending on whether a given
|
|
// appservice has membership at the time a given event was created.
|
|
func (s *OutputRoomEventConsumer) appserviceJoinedAtEvent(ctx context.Context, event *gomatrixserverlib.HeaderedEvent, appservice config.ApplicationService) bool {
|
|
// TODO: This is only checking the current room state, not the state at
|
|
// the event in question. Pretty sure this is what Synapse does too, but
|
|
// until we have a lighter way of checking the state before the event that
|
|
// doesn't involve state res, then this is probably OK.
|
|
membershipReq := &api.QueryMembershipsForRoomRequest{
|
|
RoomID: event.RoomID(),
|
|
JoinedOnly: true,
|
|
}
|
|
membershipRes := &api.QueryMembershipsForRoomResponse{}
|
|
|
|
// XXX: This could potentially race if the state for the event is not known yet
|
|
// e.g. the event came over federation but we do not have the full state persisted.
|
|
if err := s.rsAPI.QueryMembershipsForRoom(ctx, membershipReq, membershipRes); err == nil {
|
|
for _, ev := range membershipRes.JoinEvents {
|
|
var membership gomatrixserverlib.MemberContent
|
|
if err = json.Unmarshal(ev.Content, &membership); err != nil || ev.StateKey == nil {
|
|
continue
|
|
}
|
|
if appservice.IsInterestedInUserID(*ev.StateKey) {
|
|
return true
|
|
}
|
|
}
|
|
} else {
|
|
log.WithFields(log.Fields{
|
|
"room_id": event.RoomID(),
|
|
}).WithError(err).Errorf("Unable to get membership for room")
|
|
}
|
|
return false
|
|
}
|
|
|
|
// appserviceIsInterestedInEvent returns a boolean depending on whether a given
|
|
// event falls within one of a given application service's namespaces.
|
|
//
|
|
// TODO: This should be cached, see https://github.com/matrix-org/dendrite/issues/1682
|
|
func (s *OutputRoomEventConsumer) appserviceIsInterestedInEvent(ctx context.Context, event *gomatrixserverlib.HeaderedEvent, appservice config.ApplicationService) bool {
|
|
// No reason to queue events if they'll never be sent to the application
|
|
// service
|
|
if appservice.URL == "" {
|
|
return false
|
|
}
|
|
|
|
// Check Room ID and Sender of the event
|
|
if appservice.IsInterestedInUserID(event.Sender()) ||
|
|
appservice.IsInterestedInRoomID(event.RoomID()) {
|
|
return true
|
|
}
|
|
|
|
if event.Type() == gomatrixserverlib.MRoomMember && event.StateKey() != nil {
|
|
if appservice.IsInterestedInUserID(*event.StateKey()) {
|
|
return true
|
|
}
|
|
}
|
|
|
|
// Check all known room aliases of the room the event came from
|
|
queryReq := api.GetAliasesForRoomIDRequest{RoomID: event.RoomID()}
|
|
var queryRes api.GetAliasesForRoomIDResponse
|
|
if err := s.rsAPI.GetAliasesForRoomID(ctx, &queryReq, &queryRes); err == nil {
|
|
for _, alias := range queryRes.Aliases {
|
|
if appservice.IsInterestedInRoomAlias(alias) {
|
|
return true
|
|
}
|
|
}
|
|
} else {
|
|
log.WithFields(log.Fields{
|
|
"room_id": event.RoomID(),
|
|
}).WithError(err).Errorf("Unable to get aliases for room")
|
|
}
|
|
|
|
// Check if any of the members in the room match the appservice
|
|
return s.appserviceJoinedAtEvent(ctx, event, appservice)
|
|
}
|