dendrite/federationapi/routing/join.go
2023-06-07 17:14:35 +00:00

355 lines
12 KiB
Go

// Copyright 2017 New Vector 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 routing
import (
"fmt"
"net/http"
"sort"
"time"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/gomatrixserverlib/fclient"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/matrix-org/util"
"github.com/sirupsen/logrus"
"github.com/matrix-org/dendrite/internal/eventutil"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/dendrite/setup/config"
)
// MakeJoin implements the /make_join API
func MakeJoin(
httpReq *http.Request,
request *fclient.FederationRequest,
cfg *config.FederationAPI,
rsAPI api.FederationRoomserverAPI,
roomID spec.RoomID, userID spec.UserID,
remoteVersions []gomatrixserverlib.RoomVersion,
) util.JSONResponse {
roomVersion, err := rsAPI.QueryRoomVersionForRoom(httpReq.Context(), roomID.String())
if err != nil {
util.GetLogger(httpReq.Context()).WithError(err).Error("failed obtaining room version")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
req := api.QueryServerJoinedToRoomRequest{
ServerName: request.Destination(),
RoomID: roomID.String(),
}
res := api.QueryServerJoinedToRoomResponse{}
if err = rsAPI.QueryServerJoinedToRoom(httpReq.Context(), &req, &res); err != nil {
util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QueryServerJoinedToRoom failed")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
createJoinTemplate := func(proto *gomatrixserverlib.ProtoEvent) (gomatrixserverlib.PDU, []gomatrixserverlib.PDU, error) {
identity, signErr := cfg.Matrix.SigningIdentityFor(request.Destination())
if signErr != nil {
util.GetLogger(httpReq.Context()).WithError(signErr).Errorf("obtaining signing identity for %s failed", request.Destination())
return nil, nil, spec.NotFound(fmt.Sprintf("Server name %q does not exist", request.Destination()))
}
queryRes := api.QueryLatestEventsAndStateResponse{
RoomVersion: roomVersion,
}
event, signErr := eventutil.QueryAndBuildEvent(httpReq.Context(), proto, identity, time.Now(), rsAPI, &queryRes)
switch e := signErr.(type) {
case nil:
case eventutil.ErrRoomNoExists:
util.GetLogger(httpReq.Context()).WithError(signErr).Error("eventutil.BuildEvent failed")
return nil, nil, spec.NotFound("Room does not exist")
case gomatrixserverlib.BadJSONError:
util.GetLogger(httpReq.Context()).WithError(signErr).Error("eventutil.BuildEvent failed")
return nil, nil, spec.BadJSON(e.Error())
default:
util.GetLogger(httpReq.Context()).WithError(signErr).Error("eventutil.BuildEvent failed")
return nil, nil, spec.InternalServerError{}
}
stateEvents := make([]gomatrixserverlib.PDU, len(queryRes.StateEvents))
for i, stateEvent := range queryRes.StateEvents {
stateEvents[i] = stateEvent.PDU
}
return event, stateEvents, nil
}
roomQuerier := api.JoinRoomQuerier{
Roomserver: rsAPI,
}
senderID, err := rsAPI.QuerySenderIDForUser(httpReq.Context(), roomID.String(), userID)
if err != nil {
util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QuerySenderIDForUser failed")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
input := gomatrixserverlib.HandleMakeJoinInput{
Context: httpReq.Context(),
UserID: userID,
SenderID: senderID,
RoomID: roomID,
RoomVersion: roomVersion,
RemoteVersions: remoteVersions,
RequestOrigin: request.Origin(),
LocalServerName: cfg.Matrix.ServerName,
LocalServerInRoom: res.RoomExists && res.IsInRoom,
RoomQuerier: &roomQuerier,
UserIDQuerier: func(roomID string, senderID spec.SenderID) (*spec.UserID, error) {
return rsAPI.QueryUserIDForSender(httpReq.Context(), roomID, senderID)
},
BuildEventTemplate: createJoinTemplate,
}
response, internalErr := gomatrixserverlib.HandleMakeJoin(input)
switch e := internalErr.(type) {
case nil:
case spec.InternalServerError:
util.GetLogger(httpReq.Context()).WithError(internalErr).Error("failed to handle make_join request")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
case spec.MatrixError:
util.GetLogger(httpReq.Context()).WithError(internalErr).Error("failed to handle make_join request")
code := http.StatusInternalServerError
switch e.ErrCode {
case spec.ErrorForbidden:
code = http.StatusForbidden
case spec.ErrorNotFound:
code = http.StatusNotFound
case spec.ErrorUnableToAuthoriseJoin:
fallthrough // http.StatusBadRequest
case spec.ErrorBadJSON:
code = http.StatusBadRequest
}
return util.JSONResponse{
Code: code,
JSON: e,
}
case spec.IncompatibleRoomVersionError:
util.GetLogger(httpReq.Context()).WithError(internalErr).Error("failed to handle make_join request")
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: e,
}
default:
util.GetLogger(httpReq.Context()).WithError(internalErr).Error("failed to handle make_join request")
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.Unknown("unknown error"),
}
}
if response == nil {
util.GetLogger(httpReq.Context()).Error("gmsl.HandleMakeJoin returned invalid response")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: map[string]interface{}{
"event": response.JoinTemplateEvent,
"room_version": response.RoomVersion,
},
}
}
// SendJoin implements the /send_join API
// The make-join send-join dance makes much more sense as a single
// flow so the cyclomatic complexity is high:
// nolint:gocyclo
func SendJoin(
httpReq *http.Request,
request *fclient.FederationRequest,
cfg *config.FederationAPI,
rsAPI api.FederationRoomserverAPI,
keys gomatrixserverlib.JSONVerifier,
roomID spec.RoomID,
eventID string,
) util.JSONResponse {
roomVersion, err := rsAPI.QueryRoomVersionForRoom(httpReq.Context(), roomID.String())
if err != nil {
util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QueryRoomVersionForRoom failed")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
input := gomatrixserverlib.HandleSendJoinInput{
Context: httpReq.Context(),
RoomID: roomID,
EventID: eventID,
JoinEvent: request.Content(),
RoomVersion: roomVersion,
RequestOrigin: request.Origin(),
LocalServerName: cfg.Matrix.ServerName,
KeyID: cfg.Matrix.KeyID,
PrivateKey: cfg.Matrix.PrivateKey,
Verifier: keys,
MembershipQuerier: &api.MembershipQuerier{Roomserver: rsAPI},
UserIDQuerier: func(roomID string, senderID spec.SenderID) (*spec.UserID, error) {
return rsAPI.QueryUserIDForSender(httpReq.Context(), roomID, senderID)
},
}
response, joinErr := gomatrixserverlib.HandleSendJoin(input)
switch e := joinErr.(type) {
case nil:
case spec.InternalServerError:
util.GetLogger(httpReq.Context()).WithError(joinErr)
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
case spec.MatrixError:
util.GetLogger(httpReq.Context()).WithError(joinErr)
code := http.StatusInternalServerError
switch e.ErrCode {
case spec.ErrorForbidden:
code = http.StatusForbidden
case spec.ErrorNotFound:
code = http.StatusNotFound
case spec.ErrorUnsupportedRoomVersion:
code = http.StatusInternalServerError
case spec.ErrorBadJSON:
code = http.StatusBadRequest
}
return util.JSONResponse{
Code: code,
JSON: e,
}
default:
util.GetLogger(httpReq.Context()).WithError(joinErr)
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.Unknown("unknown error"),
}
}
if response == nil {
util.GetLogger(httpReq.Context()).Error("gmsl.HandleMakeJoin returned invalid response")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
// Fetch the state and auth chain. We do this before we send the events
// on, in case this fails.
var stateAndAuthChainResponse api.QueryStateAndAuthChainResponse
err = rsAPI.QueryStateAndAuthChain(httpReq.Context(), &api.QueryStateAndAuthChainRequest{
PrevEventIDs: response.JoinEvent.PrevEventIDs(),
AuthEventIDs: response.JoinEvent.AuthEventIDs(),
RoomID: roomID.String(),
ResolveState: true,
}, &stateAndAuthChainResponse)
if err != nil {
util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QueryStateAndAuthChain failed")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
if !stateAndAuthChainResponse.RoomExists {
return util.JSONResponse{
Code: http.StatusNotFound,
JSON: spec.NotFound("Room does not exist"),
}
}
if !stateAndAuthChainResponse.StateKnown {
return util.JSONResponse{
Code: http.StatusForbidden,
JSON: spec.Forbidden("State not known"),
}
}
// Send the events to the room server.
// We are responsible for notifying other servers that the user has joined
// the room, so set SendAsServer to cfg.Matrix.ServerName
if !response.AlreadyJoined {
var rsResponse api.InputRoomEventsResponse
rsAPI.InputRoomEvents(httpReq.Context(), &api.InputRoomEventsRequest{
InputRoomEvents: []api.InputRoomEvent{
{
Kind: api.KindNew,
Event: &types.HeaderedEvent{PDU: response.JoinEvent},
SendAsServer: string(cfg.Matrix.ServerName),
TransactionID: nil,
},
},
}, &rsResponse)
if rsResponse.ErrMsg != "" {
util.GetLogger(httpReq.Context()).WithField(logrus.ErrorKey, rsResponse.ErrMsg).Error("SendEvents failed")
if rsResponse.NotAllowed {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.Forbidden(rsResponse.ErrMsg),
}
}
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
}
// sort events deterministically by depth (lower is earlier)
// We also do this because sytest's basic federation server isn't good at using the correct
// state if these lists are randomised, resulting in flakey tests. :(
sort.Sort(eventsByDepth(stateAndAuthChainResponse.StateEvents))
sort.Sort(eventsByDepth(stateAndAuthChainResponse.AuthChainEvents))
// https://matrix.org/docs/spec/server_server/latest#put-matrix-federation-v1-send-join-roomid-eventid
return util.JSONResponse{
Code: http.StatusOK,
JSON: fclient.RespSendJoin{
StateEvents: types.NewEventJSONsFromHeaderedEvents(stateAndAuthChainResponse.StateEvents),
AuthEvents: types.NewEventJSONsFromHeaderedEvents(stateAndAuthChainResponse.AuthChainEvents),
Origin: cfg.Matrix.ServerName,
Event: response.JoinEvent.JSON(),
},
}
}
type eventsByDepth []*types.HeaderedEvent
func (e eventsByDepth) Len() int {
return len(e)
}
func (e eventsByDepth) Swap(i, j int) {
e[i], e[j] = e[j], e[i]
}
func (e eventsByDepth) Less(i, j int) bool {
return e[i].Depth() < e[j].Depth()
}