Implement backfill in the roomserver (#983)
* Initial cut for backfilling The syncserver now asks the roomserver via QueryBackfill (which already existed to *handle* backfill requests) which then makes federation requests via gomatrixserverlib.RequestBackfill. Currently, tests fail on subsequent /messages requests because we don't know which servers are in the room, because we are unable to get state snapshots from a backfilled event because that code doesn't exist yet. * WIP backfill, doesn't work * Make initial backfill pass checks * Persist backfilled events with state snapshots * Remove debug lines * Linting * Review commentsmain
Kegsay
GitHub
parent
3a858afca2
commit
6d832ae544
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@ -148,7 +148,7 @@ func main() {
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federation := createFederationClient(base)
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keyRing := keydb.CreateKeyRing(federation.Client, keyDB, cfg.Matrix.KeyPerspectives)
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alias, input, query := roomserver.SetupRoomServerComponent(&base.Base)
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alias, input, query := roomserver.SetupRoomServerComponent(&base.Base, keyRing)
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eduInputAPI := eduserver.SetupEDUServerComponent(&base.Base, cache.New())
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asQuery := appservice.SetupAppServiceAPIComponent(
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&base.Base, accountDB, deviceDB, federation, alias, query, transactions.New(),
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@ -57,7 +57,7 @@ func main() {
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federation := base.CreateFederationClient()
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keyRing := keydb.CreateKeyRing(federation.Client, keyDB, cfg.Matrix.KeyPerspectives)
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alias, input, query := roomserver.SetupRoomServerComponent(base)
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alias, input, query := roomserver.SetupRoomServerComponent(base, keyRing)
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eduInputAPI := eduserver.SetupEDUServerComponent(base, cache.New())
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asQuery := appservice.SetupAppServiceAPIComponent(
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base, accountDB, deviceDB, federation, alias, query, transactions.New(),
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@ -18,6 +18,7 @@ import (
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_ "net/http/pprof"
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"github.com/matrix-org/dendrite/common/basecomponent"
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"github.com/matrix-org/dendrite/common/keydb"
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"github.com/matrix-org/dendrite/roomserver"
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)
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@ -25,8 +26,11 @@ func main() {
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cfg := basecomponent.ParseFlags()
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base := basecomponent.NewBaseDendrite(cfg, "RoomServerAPI")
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defer base.Close() // nolint: errcheck
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keyDB := base.CreateKeyDB()
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federation := base.CreateFederationClient()
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keyRing := keydb.CreateKeyRing(federation.Client, keyDB, cfg.Matrix.KeyPerspectives)
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roomserver.SetupRoomServerComponent(base)
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roomserver.SetupRoomServerComponent(base, keyRing)
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base.SetupAndServeHTTP(string(base.Cfg.Bind.RoomServer), string(base.Cfg.Listen.RoomServer))
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@ -69,6 +69,7 @@ func Backfill(
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// Populate the request.
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req := api.QueryBackfillRequest{
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RoomID: roomID,
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EarliestEventsIDs: eIDs,
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ServerName: request.Origin(),
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}
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1
go.mod
1
go.mod
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@ -26,6 +26,7 @@ require (
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github.com/opentracing/opentracing-go v1.1.0
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github.com/pkg/errors v0.9.1
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github.com/prometheus/client_golang v1.4.1
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github.com/prometheus/common v0.9.1
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github.com/sirupsen/logrus v1.4.2
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github.com/tidwall/gjson v1.6.0
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github.com/uber/jaeger-client-go v2.15.0+incompatible
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11
go.sum
11
go.sum
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@ -367,6 +367,16 @@ github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26 h1:Hr3zjRsq2bh
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github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26/go.mod h1:3fxX6gUjWyI/2Bt7J1OLhpCzOfO/bB3AiX0cJtEKud0=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5 h1:kmRjpmFOenVpOaV/DRlo9p6z/IbOKlUC+hhKsAAh8Qg=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200422082552-d7b4202c47f3 h1:xis1ojN99vjygwqudzB9VQq3cM2SJ7aCAMlXj/YN+88=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200422082552-d7b4202c47f3/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200423090438-562549dbe799 h1:OsoUMTirIpeuZJdYkKKiYe6jm0E5viZR7aOS9K465QI=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200423090438-562549dbe799/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200424154222-2827b39252bd h1:243fMfK0XqTQsdUY3IIqtxPX5g9MfPTaAP92CseqOek=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200424154222-2827b39252bd/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200427134702-21db6d1430e3 h1:aJMAKjfXG5I8TqPxJQbQIkGSWM770oxkpgsPHE8C06E=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200427134702-21db6d1430e3/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200427152419-6a0535cc473a h1:tlXCVU3eab9kksGYBRA3oyrmIRwD/aPujo5KJCdlCVQ=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200427152419-6a0535cc473a/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200428095012-a95e289995b1 h1:TB4V69eOtvmHdFp0+BgLNrDCcCwq6QDUOTjmi8fjC/M=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200428095012-a95e289995b1/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
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github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1 h1:osLoFdOy+ChQqVUn2PeTDETFftVkl4w9t/OW18g3lnk=
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@ -677,6 +687,7 @@ google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZi
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google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
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gopkg.in/Shopify/sarama.v1 v1.20.1 h1:Gi09A3fJXm0Jgt8kuKZ8YK+r60GfYn7MQuEmI3oq6hE=
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gopkg.in/Shopify/sarama.v1 v1.20.1/go.mod h1:AxnvoaevB2nBjNK17cG61A3LleFcWFwVBHBt+cot4Oc=
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gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=
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gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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@ -229,6 +229,8 @@ type QueryStateAndAuthChainResponse struct {
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// QueryBackfillRequest is a request to QueryBackfill.
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type QueryBackfillRequest struct {
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// The room to backfill
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RoomID string `json:"room_id"`
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// Events to start paginating from.
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EarliestEventsIDs []string `json:"earliest_event_ids"`
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// The maximum number of events to retrieve.
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@ -243,21 +245,7 @@ type QueryBackfillResponse struct {
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Events []gomatrixserverlib.HeaderedEvent `json:"events"`
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}
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// QueryServersInRoomAtEventRequest is a request to QueryServersInRoomAtEvent
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type QueryServersInRoomAtEventRequest struct {
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// ID of the room to retrieve member servers for.
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RoomID string `json:"room_id"`
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// ID of the event for which to retrieve member servers.
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EventID string `json:"event_id"`
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}
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// QueryServersInRoomAtEventResponse is a response to QueryServersInRoomAtEvent
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type QueryServersInRoomAtEventResponse struct {
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// Servers present in the room for these events.
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Servers []gomatrixserverlib.ServerName `json:"servers"`
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}
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// QueryRoomVersionCapabilities asks for the default room version
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// QueryRoomVersionCapabilitiesRequest asks for the default room version
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type QueryRoomVersionCapabilitiesRequest struct{}
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// QueryRoomVersionCapabilitiesResponse is a response to QueryRoomVersionCapabilitiesRequest
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@ -266,12 +254,12 @@ type QueryRoomVersionCapabilitiesResponse struct {
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AvailableRoomVersions map[gomatrixserverlib.RoomVersion]string `json:"available"`
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}
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// QueryRoomVersionForRoom asks for the room version for a given room.
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// QueryRoomVersionForRoomRequest asks for the room version for a given room.
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type QueryRoomVersionForRoomRequest struct {
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RoomID string `json:"room_id"`
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}
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// QueryRoomVersionCapabilitiesResponse is a response to QueryServersInRoomAtEventResponse
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// QueryRoomVersionForRoomResponse is a response to QueryRoomVersionForRoomRequest
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type QueryRoomVersionForRoomResponse struct {
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RoomVersion gomatrixserverlib.RoomVersion `json:"room_version"`
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}
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@ -350,12 +338,6 @@ type RoomserverQueryAPI interface {
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response *QueryBackfillResponse,
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) error
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QueryServersInRoomAtEvent(
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ctx context.Context,
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request *QueryServersInRoomAtEventRequest,
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response *QueryServersInRoomAtEventResponse,
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) error
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// Asks for the default room version as preferred by the server.
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QueryRoomVersionCapabilities(
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ctx context.Context,
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@ -401,13 +383,10 @@ const RoomserverQueryStateAndAuthChainPath = "/api/roomserver/queryStateAndAuthC
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// RoomserverQueryBackfillPath is the HTTP path for the QueryBackfillPath API
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const RoomserverQueryBackfillPath = "/api/roomserver/queryBackfill"
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// RoomserverQueryServersInRoomAtEventPath is the HTTP path for the QueryServersInRoomAtEvent API
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const RoomserverQueryServersInRoomAtEventPath = "/api/roomserver/queryServersInRoomAtEvents"
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// RoomserverQueryRoomVersionCapabilitiesPath is the HTTP path for the QueryRoomVersionCapabilities API
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const RoomserverQueryRoomVersionCapabilitiesPath = "/api/roomserver/queryRoomVersionCapabilities"
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// RoomserverQueryRoomVersionCapabilitiesPath is the HTTP path for the QueryRoomVersionCapabilities API
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// RoomserverQueryRoomVersionForRoomPath is the HTTP path for the QueryRoomVersionForRoom API
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const RoomserverQueryRoomVersionForRoomPath = "/api/roomserver/queryRoomVersionForRoom"
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// NewRoomserverQueryAPIHTTP creates a RoomserverQueryAPI implemented by talking to a HTTP POST API.
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@ -555,19 +534,6 @@ func (h *httpRoomserverQueryAPI) QueryBackfill(
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return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
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}
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// QueryServersInRoomAtEvent implements RoomServerQueryAPI
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func (h *httpRoomserverQueryAPI) QueryServersInRoomAtEvent(
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ctx context.Context,
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request *QueryServersInRoomAtEventRequest,
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response *QueryServersInRoomAtEventResponse,
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) error {
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span, ctx := opentracing.StartSpanFromContext(ctx, "QueryServersInRoomAtEvent")
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defer span.Finish()
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apiURL := h.roomserverURL + RoomserverQueryServersInRoomAtEventPath
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return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
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}
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// QueryRoomVersionCapabilities implements RoomServerQueryAPI
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func (h *httpRoomserverQueryAPI) QueryRoomVersionCapabilities(
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ctx context.Context,
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@ -26,6 +26,7 @@ import (
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"github.com/matrix-org/dendrite/roomserver/storage"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/sirupsen/logrus"
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log "github.com/sirupsen/logrus"
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)
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@ -53,6 +54,7 @@ func processRoomEvent(
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// Check that the event passes authentication checks and work out the numeric IDs for the auth events.
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authEventNIDs, err := checkAuthEvents(ctx, db, headered, input.AuthEventIDs)
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if err != nil {
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logrus.WithError(err).WithField("event_id", event.EventID()).Error("processRoomEvent.checkAuthEvents failed for event")
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return
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}
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@ -77,6 +79,7 @@ func processRoomEvent(
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// For outliers we can stop after we've stored the event itself as it
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// doesn't have any associated state to store and we don't need to
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// notify anyone about it.
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logrus.WithField("event_id", event.EventID()).WithField("type", event.Type()).WithField("room", event.RoomID()).Info("Stored outlier")
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return event.EventID(), nil
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}
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@ -89,11 +92,6 @@ func processRoomEvent(
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}
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}
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if input.Kind == api.KindBackfill {
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// Backfill is not implemented.
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panic("Not implemented")
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}
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// Update the extremities of the event graph for the room
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return event.EventID(), updateLatestEvents(
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ctx, db, ow, roomNID, stateAtEvent, event, input.SendAsServer, input.TransactionID,
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|
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@ -0,0 +1,217 @@
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package query
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import (
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"context"
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"github.com/matrix-org/dendrite/roomserver/storage"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/sirupsen/logrus"
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)
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// backfillRequester implements gomatrixserverlib.BackfillRequester
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type backfillRequester struct {
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db storage.Database
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fedClient *gomatrixserverlib.FederationClient
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thisServer gomatrixserverlib.ServerName
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// per-request state
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servers []gomatrixserverlib.ServerName
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eventIDToBeforeStateIDs map[string][]string
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eventIDMap map[string]gomatrixserverlib.Event
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}
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func newBackfillRequester(db storage.Database, fedClient *gomatrixserverlib.FederationClient, thisServer gomatrixserverlib.ServerName) *backfillRequester {
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return &backfillRequester{
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db: db,
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fedClient: fedClient,
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thisServer: thisServer,
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eventIDToBeforeStateIDs: make(map[string][]string),
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eventIDMap: make(map[string]gomatrixserverlib.Event),
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}
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}
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func (b *backfillRequester) StateIDsBeforeEvent(ctx context.Context, targetEvent gomatrixserverlib.HeaderedEvent) ([]string, error) {
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b.eventIDMap[targetEvent.EventID()] = targetEvent.Unwrap()
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if ids, ok := b.eventIDToBeforeStateIDs[targetEvent.EventID()]; ok {
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return ids, nil
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}
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// if we have exactly 1 prev event and we know the state of the room at that prev event, then just roll forward the prev event.
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// Else, we have to hit /state_ids because either we don't know the state at all at this event (new backwards extremity) or
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// we don't know the result of state res to merge forks (2 or more prev_events)
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if len(targetEvent.PrevEventIDs()) == 1 {
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prevEventID := targetEvent.PrevEventIDs()[0]
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prevEvent, ok := b.eventIDMap[prevEventID]
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if !ok {
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goto FederationHit
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}
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prevEventStateIDs, ok := b.eventIDToBeforeStateIDs[prevEventID]
|
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if !ok {
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goto FederationHit
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}
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newStateIDs := b.calculateNewStateIDs(targetEvent.Unwrap(), prevEvent, prevEventStateIDs)
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if newStateIDs != nil {
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b.eventIDToBeforeStateIDs[targetEvent.EventID()] = newStateIDs
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return newStateIDs, nil
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}
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// else we failed to calculate the new state, so fallthrough
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}
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FederationHit:
|
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var lastErr error
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logrus.WithField("event_id", targetEvent.EventID()).Info("Requesting /state_ids at event")
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for _, srv := range b.servers { // hit any valid server
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c := gomatrixserverlib.FederatedStateProvider{
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FedClient: b.fedClient,
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AuthEventsOnly: false,
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Server: srv,
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}
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res, err := c.StateIDsBeforeEvent(ctx, targetEvent)
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if err != nil {
|
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lastErr = err
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continue
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}
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b.eventIDToBeforeStateIDs[targetEvent.EventID()] = res
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return res, nil
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}
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return nil, lastErr
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}
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|
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func (b *backfillRequester) calculateNewStateIDs(targetEvent, prevEvent gomatrixserverlib.Event, prevEventStateIDs []string) []string {
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newStateIDs := prevEventStateIDs[:]
|
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if prevEvent.StateKey() == nil {
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// state is the same as the previous event
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b.eventIDToBeforeStateIDs[targetEvent.EventID()] = newStateIDs
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return newStateIDs
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}
|
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|
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missingState := false // true if we are missing the info for a state event ID
|
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foundEvent := false // true if we found a (type, state_key) match
|
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// find which state ID to replace, if any
|
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for i, id := range newStateIDs {
|
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ev, ok := b.eventIDMap[id]
|
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if !ok {
|
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missingState = true
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continue
|
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}
|
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// The state IDs BEFORE the target event are the state IDs BEFORE the prev_event PLUS the prev_event itself
|
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if ev.Type() == prevEvent.Type() && ev.StateKey() != nil && *ev.StateKey() == *prevEvent.StateKey() {
|
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newStateIDs[i] = prevEvent.EventID()
|
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foundEvent = true
|
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break
|
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}
|
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}
|
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if !foundEvent && !missingState {
|
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// we can be certain that this is new state
|
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newStateIDs = append(newStateIDs, prevEvent.EventID())
|
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foundEvent = true
|
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}
|
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|
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if foundEvent {
|
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b.eventIDToBeforeStateIDs[targetEvent.EventID()] = newStateIDs
|
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return newStateIDs
|
||||
}
|
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return nil
|
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}
|
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|
||||
func (b *backfillRequester) StateBeforeEvent(ctx context.Context, roomVer gomatrixserverlib.RoomVersion, event gomatrixserverlib.HeaderedEvent, eventIDs []string) (map[string]*gomatrixserverlib.Event, error) {
|
||||
// try to fetch the events from the database first
|
||||
events, err := b.ProvideEvents(roomVer, eventIDs)
|
||||
if err != nil {
|
||||
// non-fatal, fallthrough
|
||||
logrus.WithError(err).Info("Failed to fetch events")
|
||||
} else {
|
||||
logrus.Infof("Fetched %d/%d events from the database", len(events), len(eventIDs))
|
||||
if len(events) == len(eventIDs) {
|
||||
result := make(map[string]*gomatrixserverlib.Event)
|
||||
for i := range events {
|
||||
result[events[i].EventID()] = &events[i]
|
||||
b.eventIDMap[events[i].EventID()] = events[i]
|
||||
}
|
||||
return result, nil
|
||||
}
|
||||
}
|
||||
|
||||
c := gomatrixserverlib.FederatedStateProvider{
|
||||
FedClient: b.fedClient,
|
||||
AuthEventsOnly: false,
|
||||
Server: b.servers[0],
|
||||
}
|
||||
result, err := c.StateBeforeEvent(ctx, roomVer, event, eventIDs)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
for eventID, ev := range result {
|
||||
b.eventIDMap[eventID] = *ev
|
||||
}
|
||||
return result, nil
|
||||
}
|
||||
|
||||
// ServersAtEvent is called when trying to determine which server to request from.
|
||||
// It returns a list of servers which can be queried for backfill requests. These servers
|
||||
// will be servers that are in the room already. The entries at the beginning are preferred servers
|
||||
// and will be tried first. An empty list will fail the request.
|
||||
func (b *backfillRequester) ServersAtEvent(ctx context.Context, roomID, eventID string) (servers []gomatrixserverlib.ServerName) {
|
||||
// getMembershipsBeforeEventNID requires a NID, so retrieving the NID for
|
||||
// the event is necessary.
|
||||
NIDs, err := b.db.EventNIDs(ctx, []string{eventID})
|
||||
if err != nil {
|
||||
logrus.WithField("event_id", eventID).WithError(err).Error("ServersAtEvent: failed to get event NID for event")
|
||||
return
|
||||
}
|
||||
|
||||
// Retrieve all "m.room.member" state events of "join" membership, which
|
||||
// contains the list of users in the room before the event, therefore all
|
||||
// the servers in it at that moment.
|
||||
events, err := getMembershipsBeforeEventNID(ctx, b.db, NIDs[eventID], true)
|
||||
if err != nil {
|
||||
logrus.WithField("event_id", eventID).WithError(err).Error("ServersAtEvent: failed to get memberships before event")
|
||||
return
|
||||
}
|
||||
|
||||
// Store the server names in a temporary map to avoid duplicates.
|
||||
serverSet := make(map[gomatrixserverlib.ServerName]bool)
|
||||
for _, event := range events {
|
||||
serverSet[event.Origin()] = true
|
||||
}
|
||||
for server := range serverSet {
|
||||
if server == b.thisServer {
|
||||
continue
|
||||
}
|
||||
servers = append(servers, server)
|
||||
}
|
||||
b.servers = servers
|
||||
return
|
||||
}
|
||||
|
||||
// Backfill performs a backfill request to the given server.
|
||||
// https://matrix.org/docs/spec/server_server/latest#get-matrix-federation-v1-backfill-roomid
|
||||
func (b *backfillRequester) Backfill(ctx context.Context, server gomatrixserverlib.ServerName, roomID string, fromEventIDs []string, limit int) (*gomatrixserverlib.Transaction, error) {
|
||||
tx, err := b.fedClient.Backfill(ctx, server, roomID, limit, fromEventIDs)
|
||||
return &tx, err
|
||||
}
|
||||
|
||||
func (b *backfillRequester) ProvideEvents(roomVer gomatrixserverlib.RoomVersion, eventIDs []string) ([]gomatrixserverlib.Event, error) {
|
||||
ctx := context.Background()
|
||||
nidMap, err := b.db.EventNIDs(ctx, eventIDs)
|
||||
if err != nil {
|
||||
logrus.WithError(err).WithField("event_ids", eventIDs).Error("Failed to find events")
|
||||
return nil, err
|
||||
}
|
||||
eventNIDs := make([]types.EventNID, len(nidMap))
|
||||
i := 0
|
||||
for _, nid := range nidMap {
|
||||
eventNIDs[i] = nid
|
||||
i++
|
||||
}
|
||||
eventsWithNids, err := b.db.Events(ctx, eventNIDs)
|
||||
if err != nil {
|
||||
logrus.WithError(err).WithField("event_nids", eventNIDs).Error("Failed to load events")
|
||||
return nil, err
|
||||
}
|
||||
events := make([]gomatrixserverlib.Event, len(eventsWithNids))
|
||||
for i := range eventsWithNids {
|
||||
events[i] = eventsWithNids[i].Event
|
||||
}
|
||||
return events, nil
|
||||
}
|
||||
|
|
@ -19,6 +19,7 @@ package query
|
|||
import (
|
||||
"context"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"net/http"
|
||||
|
||||
"github.com/matrix-org/dendrite/common"
|
||||
|
|
@ -31,12 +32,16 @@ import (
|
|||
"github.com/matrix-org/dendrite/roomserver/version"
|
||||
"github.com/matrix-org/gomatrixserverlib"
|
||||
"github.com/matrix-org/util"
|
||||
"github.com/sirupsen/logrus"
|
||||
)
|
||||
|
||||
// RoomserverQueryAPI is an implementation of api.RoomserverQueryAPI
|
||||
type RoomserverQueryAPI struct {
|
||||
DB storage.Database
|
||||
ImmutableCache caching.ImmutableCache
|
||||
ServerName gomatrixserverlib.ServerName
|
||||
KeyRing gomatrixserverlib.JSONVerifier
|
||||
FedClient *gomatrixserverlib.FederationClient
|
||||
}
|
||||
|
||||
// QueryLatestEventsAndState implements api.RoomserverQueryAPI
|
||||
|
|
@ -281,7 +286,7 @@ func (r *RoomserverQueryAPI) QueryMembershipsForRoom(
|
|||
|
||||
events, err = r.DB.Events(ctx, eventNIDs)
|
||||
} else {
|
||||
events, err = r.getMembershipsBeforeEventNID(ctx, membershipEventNID, request.JoinedOnly)
|
||||
events, err = getMembershipsBeforeEventNID(ctx, r.DB, membershipEventNID, request.JoinedOnly)
|
||||
}
|
||||
|
||||
if err != nil {
|
||||
|
|
@ -300,19 +305,19 @@ func (r *RoomserverQueryAPI) QueryMembershipsForRoom(
|
|||
// of the event's room as it was when this event was fired, then filters the state events to
|
||||
// only keep the "m.room.member" events with a "join" membership. These events are returned.
|
||||
// Returns an error if there was an issue fetching the events.
|
||||
func (r *RoomserverQueryAPI) getMembershipsBeforeEventNID(
|
||||
ctx context.Context, eventNID types.EventNID, joinedOnly bool,
|
||||
func getMembershipsBeforeEventNID(
|
||||
ctx context.Context, db storage.Database, eventNID types.EventNID, joinedOnly bool,
|
||||
) ([]types.Event, error) {
|
||||
roomState := state.NewStateResolution(r.DB)
|
||||
roomState := state.NewStateResolution(db)
|
||||
events := []types.Event{}
|
||||
// Lookup the event NID
|
||||
eIDs, err := r.DB.EventIDs(ctx, []types.EventNID{eventNID})
|
||||
eIDs, err := db.EventIDs(ctx, []types.EventNID{eventNID})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
eventIDs := []string{eIDs[eventNID]}
|
||||
|
||||
prevState, err := r.DB.StateAtEventIDs(ctx, eventIDs)
|
||||
prevState, err := db.StateAtEventIDs(ctx, eventIDs)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
|
@ -332,7 +337,7 @@ func (r *RoomserverQueryAPI) getMembershipsBeforeEventNID(
|
|||
}
|
||||
|
||||
// Get all of the events in this state
|
||||
stateEvents, err := r.DB.Events(ctx, eventNIDs)
|
||||
stateEvents, err := db.Events(ctx, eventNIDs)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
|
@ -484,6 +489,13 @@ func (r *RoomserverQueryAPI) QueryBackfill(
|
|||
request *api.QueryBackfillRequest,
|
||||
response *api.QueryBackfillResponse,
|
||||
) error {
|
||||
// if we are requesting the backfill then we need to do a federation hit
|
||||
// TODO: we could be more sensible and fetch as many events we already have then request the rest
|
||||
// which is what the syncapi does already.
|
||||
if request.ServerName == r.ServerName {
|
||||
return r.backfillViaFederation(ctx, request, response)
|
||||
}
|
||||
// someone else is requesting the backfill, try to service their request.
|
||||
var err error
|
||||
var front []string
|
||||
|
||||
|
|
@ -525,6 +537,55 @@ func (r *RoomserverQueryAPI) QueryBackfill(
|
|||
return err
|
||||
}
|
||||
|
||||
func (r *RoomserverQueryAPI) backfillViaFederation(ctx context.Context, req *api.QueryBackfillRequest, res *api.QueryBackfillResponse) error {
|
||||
roomVer, err := r.DB.GetRoomVersionForRoom(ctx, req.RoomID)
|
||||
if err != nil {
|
||||
return fmt.Errorf("backfillViaFederation: unknown room version for room %s : %w", req.RoomID, err)
|
||||
}
|
||||
requester := newBackfillRequester(r.DB, r.FedClient, r.ServerName)
|
||||
events, err := gomatrixserverlib.RequestBackfill(
|
||||
ctx, requester,
|
||||
r.KeyRing, req.RoomID, roomVer, req.EarliestEventsIDs, req.Limit)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
logrus.WithField("room_id", req.RoomID).Infof("backfilled %d events", len(events))
|
||||
|
||||
// persist these new events - auth checks have already been done
|
||||
roomNID, backfilledEventMap := persistEvents(ctx, r.DB, events)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
for _, ev := range backfilledEventMap {
|
||||
// now add state for these events
|
||||
stateIDs, ok := requester.eventIDToBeforeStateIDs[ev.EventID()]
|
||||
if !ok {
|
||||
// this should be impossible as all events returned must have pass Step 5 of the PDU checks
|
||||
// which requires a list of state IDs.
|
||||
logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to find state IDs for event which passed auth checks")
|
||||
continue
|
||||
}
|
||||
var entries []types.StateEntry
|
||||
if entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
var beforeStateSnapshotNID types.StateSnapshotNID
|
||||
if beforeStateSnapshotNID, err = r.DB.AddState(ctx, roomNID, nil, entries); err != nil {
|
||||
return err
|
||||
}
|
||||
if err = r.DB.SetState(ctx, ev.EventNID, beforeStateSnapshotNID); err != nil {
|
||||
logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to set state before event")
|
||||
}
|
||||
}
|
||||
|
||||
// TODO: update backwards extremities, as that should be moved from syncapi to roomserver at some point.
|
||||
|
||||
res.Events = events
|
||||
return nil
|
||||
}
|
||||
|
||||
func (r *RoomserverQueryAPI) isServerCurrentlyInRoom(ctx context.Context, serverName gomatrixserverlib.ServerName, roomID string) (bool, error) {
|
||||
roomNID, err := r.DB.RoomNID(ctx, roomID)
|
||||
if err != nil {
|
||||
|
|
@ -778,39 +839,33 @@ func getAuthChain(
|
|||
return authEvents, nil
|
||||
}
|
||||
|
||||
// QueryServersInRoomAtEvent implements api.RoomserverQueryAPI
|
||||
func (r *RoomserverQueryAPI) QueryServersInRoomAtEvent(
|
||||
ctx context.Context,
|
||||
request *api.QueryServersInRoomAtEventRequest,
|
||||
response *api.QueryServersInRoomAtEventResponse,
|
||||
) error {
|
||||
// getMembershipsBeforeEventNID requires a NID, so retrieving the NID for
|
||||
// the event is necessary.
|
||||
NIDs, err := r.DB.EventNIDs(ctx, []string{request.EventID})
|
||||
if err != nil {
|
||||
return err
|
||||
func persistEvents(ctx context.Context, db storage.Database, events []gomatrixserverlib.HeaderedEvent) (types.RoomNID, map[string]types.Event) {
|
||||
var roomNID types.RoomNID
|
||||
backfilledEventMap := make(map[string]types.Event)
|
||||
for _, ev := range events {
|
||||
nidMap, err := db.EventNIDs(ctx, ev.AuthEventIDs())
|
||||
if err != nil { // this shouldn't happen as RequestBackfill already found them
|
||||
logrus.WithError(err).WithField("auth_events", ev.AuthEventIDs()).Error("Failed to find one or more auth events")
|
||||
continue
|
||||
}
|
||||
authNids := make([]types.EventNID, len(nidMap))
|
||||
i := 0
|
||||
for _, nid := range nidMap {
|
||||
authNids[i] = nid
|
||||
i++
|
||||
}
|
||||
var stateAtEvent types.StateAtEvent
|
||||
roomNID, stateAtEvent, err = db.StoreEvent(ctx, ev.Unwrap(), nil, authNids)
|
||||
if err != nil {
|
||||
logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to store backfilled event")
|
||||
continue
|
||||
}
|
||||
backfilledEventMap[ev.EventID()] = types.Event{
|
||||
EventNID: stateAtEvent.StateEntry.EventNID,
|
||||
Event: ev.Unwrap(),
|
||||
}
|
||||
}
|
||||
|
||||
// Retrieve all "m.room.member" state events of "join" membership, which
|
||||
// contains the list of users in the room before the event, therefore all
|
||||
// the servers in it at that moment.
|
||||
events, err := r.getMembershipsBeforeEventNID(ctx, NIDs[request.EventID], true)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Store the server names in a temporary map to avoid duplicates.
|
||||
servers := make(map[gomatrixserverlib.ServerName]bool)
|
||||
for _, event := range events {
|
||||
servers[event.Origin()] = true
|
||||
}
|
||||
|
||||
// Populate the response.
|
||||
for server := range servers {
|
||||
response.Servers = append(response.Servers, server)
|
||||
}
|
||||
|
||||
return nil
|
||||
return roomNID, backfilledEventMap
|
||||
}
|
||||
|
||||
// QueryRoomVersionCapabilities implements api.RoomserverQueryAPI
|
||||
|
|
@ -994,20 +1049,6 @@ func (r *RoomserverQueryAPI) SetupHTTP(servMux *http.ServeMux) {
|
|||
return util.JSONResponse{Code: http.StatusOK, JSON: &response}
|
||||
}),
|
||||
)
|
||||
servMux.Handle(
|
||||
api.RoomserverQueryServersInRoomAtEventPath,
|
||||
common.MakeInternalAPI("QueryServersInRoomAtEvent", func(req *http.Request) util.JSONResponse {
|
||||
var request api.QueryServersInRoomAtEventRequest
|
||||
var response api.QueryServersInRoomAtEventResponse
|
||||
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
|
||||
return util.ErrorResponse(err)
|
||||
}
|
||||
if err := r.QueryServersInRoomAtEvent(req.Context(), &request, &response); err != nil {
|
||||
return util.ErrorResponse(err)
|
||||
}
|
||||
return util.JSONResponse{Code: http.StatusOK, JSON: &response}
|
||||
}),
|
||||
)
|
||||
servMux.Handle(
|
||||
api.RoomserverQueryRoomVersionCapabilitiesPath,
|
||||
common.MakeInternalAPI("QueryRoomVersionCapabilities", func(req *http.Request) util.JSONResponse {
|
||||
|
|
|
|||
|
|
@ -18,6 +18,7 @@ import (
|
|||
"net/http"
|
||||
|
||||
"github.com/matrix-org/dendrite/roomserver/api"
|
||||
"github.com/matrix-org/gomatrixserverlib"
|
||||
|
||||
asQuery "github.com/matrix-org/dendrite/appservice/query"
|
||||
"github.com/matrix-org/dendrite/common/basecomponent"
|
||||
|
|
@ -33,7 +34,7 @@ import (
|
|||
// allowing other components running in the same process to hit the query the
|
||||
// APIs directly instead of having to use HTTP.
|
||||
func SetupRoomServerComponent(
|
||||
base *basecomponent.BaseDendrite,
|
||||
base *basecomponent.BaseDendrite, keyRing gomatrixserverlib.JSONVerifier,
|
||||
) (api.RoomserverAliasAPI, api.RoomserverInputAPI, api.RoomserverQueryAPI) {
|
||||
roomserverDB, err := storage.Open(string(base.Cfg.Database.RoomServer))
|
||||
if err != nil {
|
||||
|
|
@ -51,6 +52,11 @@ func SetupRoomServerComponent(
|
|||
queryAPI := query.RoomserverQueryAPI{
|
||||
DB: roomserverDB,
|
||||
ImmutableCache: base.ImmutableCache,
|
||||
ServerName: base.Cfg.Matrix.ServerName,
|
||||
FedClient: base.CreateFederationClient(),
|
||||
// TODO: We should have a key server so we don't keep adding components
|
||||
// which talk to the same DB.
|
||||
KeyRing: keyRing,
|
||||
}
|
||||
|
||||
queryAPI.SetupHTTP(http.DefaultServeMux)
|
||||
|
|
|
|||
|
|
@ -31,7 +31,8 @@ type Database interface {
|
|||
state []types.StateEntry,
|
||||
) (types.StateSnapshotNID, error)
|
||||
// Look up the state of a room at each event for a list of string event IDs.
|
||||
// Returns an error if there is an error talking to the database
|
||||
// Returns an error if there is an error talking to the database.
|
||||
// The length of []types.StateAtEvent is guaranteed to equal the length of eventIDs if no error is returned.
|
||||
// Returns a types.MissingEventError if the room state for the event IDs aren't in the database
|
||||
StateAtEventIDs(ctx context.Context, eventIDs []string) ([]types.StateAtEvent, error)
|
||||
// Look up the numeric IDs for a list of string event types.
|
||||
|
|
|
|||
|
|
@ -285,7 +285,7 @@ func (r *messagesReq) handleEmptyEventsSlice() (
|
|||
// Check if we have backward extremities for this room.
|
||||
if len(backwardExtremities) > 0 {
|
||||
// If so, retrieve as much events as needed through backfilling.
|
||||
events, err = r.backfill(backwardExtremities, r.limit)
|
||||
events, err = r.backfill(r.roomID, backwardExtremities, r.limit)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
|
@ -334,7 +334,7 @@ func (r *messagesReq) handleNonEmptyEventsSlice(streamEvents []types.StreamEvent
|
|||
if len(backwardExtremities) > 0 && !isSetLargeEnough && r.backwardOrdering {
|
||||
var pdus []gomatrixserverlib.HeaderedEvent
|
||||
// Only ask the remote server for enough events to reach the limit.
|
||||
pdus, err = r.backfill(backwardExtremities, r.limit-len(streamEvents))
|
||||
pdus, err = r.backfill(r.roomID, backwardExtremities, r.limit-len(streamEvents))
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
|
@ -358,45 +358,29 @@ func (r *messagesReq) handleNonEmptyEventsSlice(streamEvents []types.StreamEvent
|
|||
// event, or if there is no remote homeserver to contact.
|
||||
// Returns an error if there was an issue with retrieving the list of servers in
|
||||
// the room or sending the request.
|
||||
func (r *messagesReq) backfill(fromEventIDs []string, limit int) ([]gomatrixserverlib.HeaderedEvent, error) {
|
||||
verReq := api.QueryRoomVersionForRoomRequest{RoomID: r.roomID}
|
||||
verRes := api.QueryRoomVersionForRoomResponse{}
|
||||
if err := r.queryAPI.QueryRoomVersionForRoom(r.ctx, &verReq, &verRes); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
srvToBackfillFrom, err := r.serverToBackfillFrom(fromEventIDs)
|
||||
func (r *messagesReq) backfill(roomID string, fromEventIDs []string, limit int) ([]gomatrixserverlib.HeaderedEvent, error) {
|
||||
var res api.QueryBackfillResponse
|
||||
err := r.queryAPI.QueryBackfill(context.Background(), &api.QueryBackfillRequest{
|
||||
RoomID: roomID,
|
||||
EarliestEventsIDs: fromEventIDs,
|
||||
Limit: limit,
|
||||
ServerName: r.cfg.Matrix.ServerName,
|
||||
}, &res)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("Cannot find server to backfill from: %w", err)
|
||||
return nil, fmt.Errorf("QueryBackfill failed: %w", err)
|
||||
}
|
||||
util.GetLogger(r.ctx).WithField("new_events", len(res.Events)).Info("Storing new events from backfill")
|
||||
|
||||
headered := make([]gomatrixserverlib.HeaderedEvent, 0)
|
||||
|
||||
// If the roomserver responded with at least one server that isn't us,
|
||||
// send it a request for backfill.
|
||||
util.GetLogger(r.ctx).WithField("server", srvToBackfillFrom).WithField("limit", limit).Info("Backfilling from server")
|
||||
txn, err := r.federation.Backfill(
|
||||
r.ctx, srvToBackfillFrom, r.roomID, limit, fromEventIDs,
|
||||
)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
for _, p := range txn.PDUs {
|
||||
event, e := gomatrixserverlib.NewEventFromUntrustedJSON(p, verRes.RoomVersion)
|
||||
if e != nil {
|
||||
continue
|
||||
}
|
||||
headered = append(headered, event.Headered(verRes.RoomVersion))
|
||||
}
|
||||
util.GetLogger(r.ctx).WithField("server", srvToBackfillFrom).WithField("new_events", len(headered)).Info("Storing new events from backfill")
|
||||
// TODO: we should only be inserting events into the database from the roomserver's kafka output stream.
|
||||
// Currently, this can race with live events for the room and cause problems. It's also just a bit unclear
|
||||
// when you have multiple entry points to write events.
|
||||
|
||||
// Store the events in the database, while marking them as unfit to show
|
||||
// up in responses to sync requests.
|
||||
for i := range headered {
|
||||
for i := range res.Events {
|
||||
if _, err = r.db.WriteEvent(
|
||||
r.ctx,
|
||||
&headered[i],
|
||||
&res.Events[i],
|
||||
[]gomatrixserverlib.HeaderedEvent{},
|
||||
[]string{},
|
||||
[]string{},
|
||||
|
|
@ -406,63 +390,7 @@ func (r *messagesReq) backfill(fromEventIDs []string, limit int) ([]gomatrixserv
|
|||
}
|
||||
}
|
||||
|
||||
return headered, nil
|
||||
}
|
||||
|
||||
func (r *messagesReq) serverToBackfillFrom(fromEventIDs []string) (gomatrixserverlib.ServerName, error) {
|
||||
// Query the list of servers in the room when one of the backward extremities
|
||||
// was sent.
|
||||
var serversResponse api.QueryServersInRoomAtEventResponse
|
||||
serversRequest := api.QueryServersInRoomAtEventRequest{
|
||||
RoomID: r.roomID,
|
||||
EventID: fromEventIDs[0],
|
||||
}
|
||||
if err := r.queryAPI.QueryServersInRoomAtEvent(r.ctx, &serversRequest, &serversResponse); err != nil {
|
||||
util.GetLogger(r.ctx).WithError(err).Warn("Failed to query servers in room at event, falling back to event sender")
|
||||
// FIXME: We shouldn't be doing this but in situations where we have already backfilled once
|
||||
// the query API doesn't work as backfilled events do not make it to the room server.
|
||||
// This means QueryServersInRoomAtEvent returns an error as it doesn't have the event ID in question.
|
||||
// We need to inject backfilled events into the room server and store them appropriately.
|
||||
events, err := r.db.Events(r.ctx, fromEventIDs)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
if len(events) == 0 {
|
||||
// should be impossible as these event IDs are backwards extremities
|
||||
return "", fmt.Errorf("backfill: missing backwards extremities, event IDs: %s", fromEventIDs)
|
||||
}
|
||||
// The rationale here is that the last event was unlikely to be sent by us, so poke the server who sent it.
|
||||
// We shouldn't be doing this really, but as a heuristic it should work pretty well for now.
|
||||
for _, e := range events {
|
||||
_, srv, srverr := gomatrixserverlib.SplitID('@', e.Sender())
|
||||
if srverr != nil {
|
||||
util.GetLogger(r.ctx).WithError(srverr).Warn("Failed to extract domain from event sender")
|
||||
continue
|
||||
}
|
||||
if srv != r.cfg.Matrix.ServerName {
|
||||
return srv, nil
|
||||
}
|
||||
}
|
||||
// no valid events which have a remote server, fail.
|
||||
return "", err
|
||||
}
|
||||
|
||||
// Use the first server from the response, except if that server is us.
|
||||
// In that case, use the second one if the roomserver responded with
|
||||
// enough servers. If not, use an empty string to prevent the backfill
|
||||
// from happening as there's no server to direct the request towards.
|
||||
// TODO: Be smarter at selecting the server to direct the request
|
||||
// towards.
|
||||
srvToBackfillFrom := serversResponse.Servers[0]
|
||||
if srvToBackfillFrom == r.cfg.Matrix.ServerName {
|
||||
if len(serversResponse.Servers) > 1 {
|
||||
srvToBackfillFrom = serversResponse.Servers[1]
|
||||
} else {
|
||||
util.GetLogger(r.ctx).Info("Not enough servers to backfill from")
|
||||
return "", nil
|
||||
}
|
||||
}
|
||||
return srvToBackfillFrom, nil
|
||||
return res.Events, nil
|
||||
}
|
||||
|
||||
// setToDefault returns the default value for the "to" query parameter of a
|
||||
|
|
|
|||
Loading…
Reference in New Issue