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dendrite/userapi/consumers/roomserver.go
Till 249b32c4f3
Refactor notifications (#2688)
This PR changes the handling of notifications
- removes the `StreamEvent` and `ReadUpdate` stream
- listens on the `OutputRoomEvent` stream in the UserAPI to inform the
SyncAPI about unread notifications
- listens on the `OutputReceiptEvent` stream in the UserAPI to set
receipts/update notifications
- sets the `read_markers` directly from within the internal UserAPI

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
2022-09-27 15:01:34 +02:00

614 lines
18 KiB
Go

package consumers
import (
"context"
"encoding/json"
"fmt"
"strings"
"time"
"github.com/matrix-org/gomatrixserverlib"
"github.com/nats-io/nats.go"
log "github.com/sirupsen/logrus"
"github.com/matrix-org/dendrite/internal/eventutil"
"github.com/matrix-org/dendrite/internal/pushgateway"
"github.com/matrix-org/dendrite/internal/pushrules"
rsapi "github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/dendrite/setup/jetstream"
"github.com/matrix-org/dendrite/setup/process"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/dendrite/userapi/producers"
"github.com/matrix-org/dendrite/userapi/storage"
"github.com/matrix-org/dendrite/userapi/storage/tables"
"github.com/matrix-org/dendrite/userapi/util"
)
type OutputRoomEventConsumer struct {
ctx context.Context
cfg *config.UserAPI
rsAPI rsapi.UserRoomserverAPI
jetstream nats.JetStreamContext
durable string
db storage.Database
topic string
pgClient pushgateway.Client
syncProducer *producers.SyncAPI
}
func NewOutputRoomEventConsumer(
process *process.ProcessContext,
cfg *config.UserAPI,
js nats.JetStreamContext,
store storage.Database,
pgClient pushgateway.Client,
rsAPI rsapi.UserRoomserverAPI,
syncProducer *producers.SyncAPI,
) *OutputRoomEventConsumer {
return &OutputRoomEventConsumer{
ctx: process.Context(),
cfg: cfg,
jetstream: js,
db: store,
durable: cfg.Matrix.JetStream.Durable("UserAPIRoomServerConsumer"),
topic: cfg.Matrix.JetStream.Prefixed(jetstream.OutputRoomEvent),
pgClient: pgClient,
rsAPI: rsAPI,
syncProducer: syncProducer,
}
}
func (s *OutputRoomEventConsumer) Start() error {
if err := jetstream.JetStreamConsumer(
s.ctx, s.jetstream, s.topic, s.durable, 1,
s.onMessage, nats.DeliverAll(), nats.ManualAck(),
); err != nil {
return err
}
return nil
}
func (s *OutputRoomEventConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
msg := msgs[0] // Guaranteed to exist if onMessage is called
var output rsapi.OutputEvent
if err := json.Unmarshal(msg.Data, &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 true
}
if output.Type != rsapi.OutputTypeNewRoomEvent {
return true
}
event := output.NewRoomEvent.Event
if event == nil {
log.Errorf("userapi consumer: expected event")
return true
}
log.WithFields(log.Fields{
"event_id": event.EventID(),
"event_type": event.Type(),
}).Tracef("Received message from roomserver: %#v", output)
metadata, err := msg.Metadata()
if err != nil {
return true
}
if err := s.processMessage(ctx, event, uint64(gomatrixserverlib.AsTimestamp(metadata.Timestamp))); err != nil {
log.WithFields(log.Fields{
"event_id": event.EventID(),
}).WithError(err).Errorf("userapi consumer: process room event failure")
}
return true
}
func (s *OutputRoomEventConsumer) processMessage(ctx context.Context, event *gomatrixserverlib.HeaderedEvent, streamPos uint64) error {
members, roomSize, err := s.localRoomMembers(ctx, event.RoomID())
if err != nil {
return fmt.Errorf("s.localRoomMembers: %w", err)
}
if event.Type() == gomatrixserverlib.MRoomMember {
cevent := gomatrixserverlib.HeaderedToClientEvent(event, gomatrixserverlib.FormatAll)
var member *localMembership
member, err = newLocalMembership(&cevent)
if err != nil {
return fmt.Errorf("newLocalMembership: %w", err)
}
if member.Membership == gomatrixserverlib.Invite && member.Domain == s.cfg.Matrix.ServerName {
// localRoomMembers only adds joined members. An invite
// should also be pushed to the target user.
members = append(members, member)
}
}
// TODO: run in parallel with localRoomMembers.
roomName, err := s.roomName(ctx, event)
if err != nil {
return fmt.Errorf("s.roomName: %w", err)
}
log.WithFields(log.Fields{
"event_id": event.EventID(),
"room_id": event.RoomID(),
"num_members": len(members),
"room_size": roomSize,
}).Tracef("Notifying members")
// Notification.UserIsTarget is a per-member field, so we
// cannot group all users in a single request.
//
// TODO: does it have to be set? It's not required, and
// removing it means we can send all notifications to
// e.g. Element's Push gateway in one go.
for _, mem := range members {
if err := s.notifyLocal(ctx, event, mem, roomSize, roomName, streamPos); err != nil {
log.WithFields(log.Fields{
"localpart": mem.Localpart,
}).WithError(err).Error("Unable to push to local user")
continue
}
}
return nil
}
type localMembership struct {
gomatrixserverlib.MemberContent
UserID string
Localpart string
Domain gomatrixserverlib.ServerName
}
func newLocalMembership(event *gomatrixserverlib.ClientEvent) (*localMembership, error) {
if event.StateKey == nil {
return nil, fmt.Errorf("missing state_key")
}
var member localMembership
if err := json.Unmarshal(event.Content, &member.MemberContent); err != nil {
return nil, err
}
localpart, domain, err := gomatrixserverlib.SplitID('@', *event.StateKey)
if err != nil {
return nil, err
}
member.UserID = *event.StateKey
member.Localpart = localpart
member.Domain = domain
return &member, nil
}
// localRoomMembers fetches the current local members of a room, and
// the total number of members.
func (s *OutputRoomEventConsumer) localRoomMembers(ctx context.Context, roomID string) ([]*localMembership, int, error) {
req := &rsapi.QueryMembershipsForRoomRequest{
RoomID: roomID,
JoinedOnly: true,
LocalOnly: true,
}
var res rsapi.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, req, &res); err != nil {
return nil, 0, err
}
var members []*localMembership
var ntotal int
for _, event := range res.JoinEvents {
member, err := newLocalMembership(&event)
if err != nil {
log.WithError(err).Errorf("Parsing MemberContent")
continue
}
if member.Membership != gomatrixserverlib.Join {
continue
}
if member.Domain != s.cfg.Matrix.ServerName {
continue
}
ntotal++
members = append(members, member)
}
return members, ntotal, nil
}
// roomName returns the name in the event (if type==m.room.name), or
// looks it up in roomserver. If there is no name,
// m.room.canonical_alias is consulted. Returns an empty string if the
// room has no name.
func (s *OutputRoomEventConsumer) roomName(ctx context.Context, event *gomatrixserverlib.HeaderedEvent) (string, error) {
if event.Type() == gomatrixserverlib.MRoomName {
name, err := unmarshalRoomName(event)
if err != nil {
return "", err
}
if name != "" {
return name, nil
}
}
req := &rsapi.QueryCurrentStateRequest{
RoomID: event.RoomID(),
StateTuples: []gomatrixserverlib.StateKeyTuple{roomNameTuple, canonicalAliasTuple},
}
var res rsapi.QueryCurrentStateResponse
if err := s.rsAPI.QueryCurrentState(ctx, req, &res); err != nil {
return "", nil
}
if eventS := res.StateEvents[roomNameTuple]; eventS != nil {
return unmarshalRoomName(eventS)
}
if event.Type() == gomatrixserverlib.MRoomCanonicalAlias {
alias, err := unmarshalCanonicalAlias(event)
if err != nil {
return "", err
}
if alias != "" {
return alias, nil
}
}
if event = res.StateEvents[canonicalAliasTuple]; event != nil {
return unmarshalCanonicalAlias(event)
}
return "", nil
}
var (
canonicalAliasTuple = gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomCanonicalAlias}
roomNameTuple = gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomName}
)
func unmarshalRoomName(event *gomatrixserverlib.HeaderedEvent) (string, error) {
var nc eventutil.NameContent
if err := json.Unmarshal(event.Content(), &nc); err != nil {
return "", fmt.Errorf("unmarshaling NameContent: %w", err)
}
return nc.Name, nil
}
func unmarshalCanonicalAlias(event *gomatrixserverlib.HeaderedEvent) (string, error) {
var cac eventutil.CanonicalAliasContent
if err := json.Unmarshal(event.Content(), &cac); err != nil {
return "", fmt.Errorf("unmarshaling CanonicalAliasContent: %w", err)
}
return cac.Alias, nil
}
// notifyLocal finds the right push actions for a local user, given an event.
func (s *OutputRoomEventConsumer) notifyLocal(ctx context.Context, event *gomatrixserverlib.HeaderedEvent, mem *localMembership, roomSize int, roomName string, streamPos uint64) error {
actions, err := s.evaluatePushRules(ctx, event, mem, roomSize)
if err != nil {
return err
}
a, tweaks, err := pushrules.ActionsToTweaks(actions)
if err != nil {
return err
}
// TODO: support coalescing.
if a != pushrules.NotifyAction && a != pushrules.CoalesceAction {
log.WithFields(log.Fields{
"event_id": event.EventID(),
"room_id": event.RoomID(),
"localpart": mem.Localpart,
}).Tracef("Push rule evaluation rejected the event")
return nil
}
devicesByURLAndFormat, profileTag, err := s.localPushDevices(ctx, mem.Localpart, tweaks)
if err != nil {
return err
}
n := &api.Notification{
Actions: actions,
// UNSPEC: the spec doesn't say this is a ClientEvent, but the
// fields seem to match. room_id should be missing, which
// matches the behaviour of FormatSync.
Event: gomatrixserverlib.HeaderedToClientEvent(event, gomatrixserverlib.FormatSync),
// TODO: this is per-device, but it's not part of the primary
// key. So inserting one notification per profile tag doesn't
// make sense. What is this supposed to be? Sytests require it
// to "work", but they only use a single device.
ProfileTag: profileTag,
RoomID: event.RoomID(),
TS: gomatrixserverlib.AsTimestamp(time.Now()),
}
if err = s.db.InsertNotification(ctx, mem.Localpart, event.EventID(), streamPos, tweaks, n); err != nil {
return err
}
if err = s.syncProducer.GetAndSendNotificationData(ctx, mem.UserID, event.RoomID()); err != nil {
return err
}
// We do this after InsertNotification. Thus, this should always return >=1.
userNumUnreadNotifs, err := s.db.GetNotificationCount(ctx, mem.Localpart, tables.AllNotifications)
if err != nil {
return err
}
log.WithFields(log.Fields{
"event_id": event.EventID(),
"room_id": event.RoomID(),
"localpart": mem.Localpart,
"num_urls": len(devicesByURLAndFormat),
"num_unread": userNumUnreadNotifs,
}).Trace("Notifying single member")
// Push gateways are out of our control, and we cannot risk
// looking up the server on a misbehaving push gateway. Each user
// receives a goroutine now that all internal API calls have been
// made.
//
// TODO: think about bounding this to one per user, and what
// ordering guarantees we must provide.
go func() {
// This background processing cannot be tied to a request.
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
var rejected []*pushgateway.Device
for url, fmts := range devicesByURLAndFormat {
for format, devices := range fmts {
// TODO: support "email".
if !strings.HasPrefix(url, "http") {
continue
}
// UNSPEC: the specification suggests there can be
// more than one device per request. There is at least
// one Sytest that expects one HTTP request per
// device, rather than per URL. For now, we must
// notify each one separately.
for _, dev := range devices {
rej, err := s.notifyHTTP(ctx, event, url, format, []*pushgateway.Device{dev}, mem.Localpart, roomName, int(userNumUnreadNotifs))
if err != nil {
log.WithFields(log.Fields{
"event_id": event.EventID(),
"localpart": mem.Localpart,
}).WithError(err).Errorf("Unable to notify HTTP pusher")
continue
}
rejected = append(rejected, rej...)
}
}
}
if len(rejected) > 0 {
s.deleteRejectedPushers(ctx, rejected, mem.Localpart)
}
}()
return nil
}
// evaluatePushRules fetches and evaluates the push rules of a local
// user. Returns actions (including dont_notify).
func (s *OutputRoomEventConsumer) evaluatePushRules(ctx context.Context, event *gomatrixserverlib.HeaderedEvent, mem *localMembership, roomSize int) ([]*pushrules.Action, error) {
if event.Sender() == mem.UserID {
// SPEC: Homeservers MUST NOT notify the Push Gateway for
// events that the user has sent themselves.
return nil, nil
}
// Get accountdata to check if the event.Sender() is ignored by mem.LocalPart
data, err := s.db.GetAccountDataByType(ctx, mem.Localpart, "", "m.ignored_user_list")
if err != nil {
return nil, err
}
if data != nil {
ignored := types.IgnoredUsers{}
err = json.Unmarshal(data, &ignored)
if err != nil {
return nil, err
}
sender := event.Sender()
if _, ok := ignored.List[sender]; ok {
return nil, fmt.Errorf("user %s is ignored", sender)
}
}
ruleSets, err := s.db.QueryPushRules(ctx, mem.Localpart)
if err != nil {
return nil, err
}
ec := &ruleSetEvalContext{
ctx: ctx,
rsAPI: s.rsAPI,
mem: mem,
roomID: event.RoomID(),
roomSize: roomSize,
}
eval := pushrules.NewRuleSetEvaluator(ec, &ruleSets.Global)
rule, err := eval.MatchEvent(event.Event)
if err != nil {
return nil, err
}
if rule == nil {
// SPEC: If no rules match an event, the homeserver MUST NOT
// notify the Push Gateway for that event.
return nil, err
}
log.WithFields(log.Fields{
"event_id": event.EventID(),
"room_id": event.RoomID(),
"localpart": mem.Localpart,
"rule_id": rule.RuleID,
}).Trace("Matched a push rule")
return rule.Actions, nil
}
type ruleSetEvalContext struct {
ctx context.Context
rsAPI rsapi.UserRoomserverAPI
mem *localMembership
roomID string
roomSize int
}
func (rse *ruleSetEvalContext) UserDisplayName() string { return rse.mem.DisplayName }
func (rse *ruleSetEvalContext) RoomMemberCount() (int, error) { return rse.roomSize, nil }
func (rse *ruleSetEvalContext) HasPowerLevel(userID, levelKey string) (bool, error) {
req := &rsapi.QueryLatestEventsAndStateRequest{
RoomID: rse.roomID,
StateToFetch: []gomatrixserverlib.StateKeyTuple{
{EventType: gomatrixserverlib.MRoomPowerLevels},
},
}
var res rsapi.QueryLatestEventsAndStateResponse
if err := rse.rsAPI.QueryLatestEventsAndState(rse.ctx, req, &res); err != nil {
return false, err
}
for _, ev := range res.StateEvents {
if ev.Type() != gomatrixserverlib.MRoomPowerLevels {
continue
}
plc, err := gomatrixserverlib.NewPowerLevelContentFromEvent(ev.Event)
if err != nil {
return false, err
}
return plc.UserLevel(userID) >= plc.NotificationLevel(levelKey), nil
}
return true, nil
}
// localPushDevices pushes to the configured devices of a local
// user. The map keys are [url][format].
func (s *OutputRoomEventConsumer) localPushDevices(ctx context.Context, localpart string, tweaks map[string]interface{}) (map[string]map[string][]*pushgateway.Device, string, error) {
pusherDevices, err := util.GetPushDevices(ctx, localpart, tweaks, s.db)
if err != nil {
return nil, "", err
}
var profileTag string
devicesByURL := make(map[string]map[string][]*pushgateway.Device, len(pusherDevices))
for _, pusherDevice := range pusherDevices {
if profileTag == "" {
profileTag = pusherDevice.Pusher.ProfileTag
}
url := pusherDevice.URL
if devicesByURL[url] == nil {
devicesByURL[url] = make(map[string][]*pushgateway.Device, 2)
}
devicesByURL[url][pusherDevice.Format] = append(devicesByURL[url][pusherDevice.Format], &pusherDevice.Device)
}
return devicesByURL, profileTag, nil
}
// notifyHTTP performs a notificatation to a Push Gateway.
func (s *OutputRoomEventConsumer) notifyHTTP(ctx context.Context, event *gomatrixserverlib.HeaderedEvent, url, format string, devices []*pushgateway.Device, localpart, roomName string, userNumUnreadNotifs int) ([]*pushgateway.Device, error) {
logger := log.WithFields(log.Fields{
"event_id": event.EventID(),
"url": url,
"localpart": localpart,
"num_devices": len(devices),
})
var req pushgateway.NotifyRequest
switch format {
case "event_id_only":
req = pushgateway.NotifyRequest{
Notification: pushgateway.Notification{
Counts: &pushgateway.Counts{
Unread: userNumUnreadNotifs,
},
Devices: devices,
EventID: event.EventID(),
RoomID: event.RoomID(),
},
}
default:
req = pushgateway.NotifyRequest{
Notification: pushgateway.Notification{
Content: event.Content(),
Counts: &pushgateway.Counts{
Unread: userNumUnreadNotifs,
},
Devices: devices,
EventID: event.EventID(),
ID: event.EventID(),
RoomID: event.RoomID(),
RoomName: roomName,
Sender: event.Sender(),
Type: event.Type(),
},
}
if mem, err := event.Membership(); err == nil {
req.Notification.Membership = mem
}
if event.StateKey() != nil && *event.StateKey() == fmt.Sprintf("@%s:%s", localpart, s.cfg.Matrix.ServerName) {
req.Notification.UserIsTarget = true
}
}
logger.Tracef("Notifying push gateway %s", url)
var res pushgateway.NotifyResponse
if err := s.pgClient.Notify(ctx, url, &req, &res); err != nil {
logger.WithError(err).Errorf("Failed to notify push gateway %s", url)
return nil, err
}
logger.WithField("num_rejected", len(res.Rejected)).Trace("Push gateway result")
if len(res.Rejected) == 0 {
return nil, nil
}
devMap := make(map[string]*pushgateway.Device, len(devices))
for _, d := range devices {
devMap[d.PushKey] = d
}
rejected := make([]*pushgateway.Device, 0, len(res.Rejected))
for _, pushKey := range res.Rejected {
d := devMap[pushKey]
if d != nil {
rejected = append(rejected, d)
}
}
return rejected, nil
}
// deleteRejectedPushers deletes the pushers associated with the given devices.
func (s *OutputRoomEventConsumer) deleteRejectedPushers(ctx context.Context, devices []*pushgateway.Device, localpart string) {
log.WithFields(log.Fields{
"localpart": localpart,
"app_id0": devices[0].AppID,
"num_devices": len(devices),
}).Warnf("Deleting pushers rejected by the HTTP push gateway")
for _, d := range devices {
if err := s.db.RemovePusher(ctx, d.AppID, d.PushKey, localpart); err != nil {
log.WithFields(log.Fields{
"localpart": localpart,
}).WithError(err).Errorf("Unable to delete rejected pusher")
}
}
}