154 lines
4 KiB
Go
154 lines
4 KiB
Go
// 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 routing
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import (
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"context"
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"net/http"
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"net/url"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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"github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/util"
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)
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// GetState returns state events & auth events for the roomID, eventID
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func GetState(
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ctx context.Context,
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request *gomatrixserverlib.FederationRequest,
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rsAPI api.RoomserverInternalAPI,
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roomID string,
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) util.JSONResponse {
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eventID, err := parseEventIDParam(request)
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if err != nil {
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return *err
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}
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stateEvents, authChain, err := getState(ctx, request, rsAPI, roomID, eventID)
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if err != nil {
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return *err
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}
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return util.JSONResponse{Code: http.StatusOK, JSON: &gomatrixserverlib.RespState{
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AuthEvents: gomatrixserverlib.NewEventJSONsFromHeaderedEvents(authChain),
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StateEvents: gomatrixserverlib.NewEventJSONsFromHeaderedEvents(stateEvents),
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}}
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}
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// GetStateIDs returns state event IDs & auth event IDs for the roomID, eventID
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func GetStateIDs(
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ctx context.Context,
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request *gomatrixserverlib.FederationRequest,
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rsAPI api.RoomserverInternalAPI,
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roomID string,
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) util.JSONResponse {
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eventID, err := parseEventIDParam(request)
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if err != nil {
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return *err
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}
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stateEvents, authEvents, err := getState(ctx, request, rsAPI, roomID, eventID)
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if err != nil {
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return *err
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}
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stateEventIDs := getIDsFromEvent(stateEvents)
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authEventIDs := getIDsFromEvent(authEvents)
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return util.JSONResponse{Code: http.StatusOK, JSON: gomatrixserverlib.RespStateIDs{
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StateEventIDs: stateEventIDs,
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AuthEventIDs: authEventIDs,
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},
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}
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}
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func parseEventIDParam(
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request *gomatrixserverlib.FederationRequest,
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) (eventID string, resErr *util.JSONResponse) {
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URL, err := url.Parse(request.RequestURI())
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if err != nil {
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response := util.ErrorResponse(err)
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resErr = &response
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return
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}
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eventID = URL.Query().Get("event_id")
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if eventID == "" {
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resErr = &util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.MissingArgument("event_id missing"),
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}
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}
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return
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}
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func getState(
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ctx context.Context,
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request *gomatrixserverlib.FederationRequest,
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rsAPI api.RoomserverInternalAPI,
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roomID string,
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eventID string,
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) (stateEvents, authEvents []*gomatrixserverlib.HeaderedEvent, errRes *util.JSONResponse) {
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event, resErr := fetchEvent(ctx, rsAPI, eventID)
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if resErr != nil {
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return nil, nil, resErr
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}
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if event.RoomID() != roomID {
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return nil, nil, &util.JSONResponse{Code: http.StatusNotFound, JSON: jsonerror.NotFound("event does not belong to this room")}
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}
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resErr = allowedToSeeEvent(ctx, request.Origin(), rsAPI, eventID)
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if resErr != nil {
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return nil, nil, resErr
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}
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var response api.QueryStateAndAuthChainResponse
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err := rsAPI.QueryStateAndAuthChain(
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ctx,
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&api.QueryStateAndAuthChainRequest{
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RoomID: roomID,
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PrevEventIDs: []string{eventID},
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AuthEventIDs: event.AuthEventIDs(),
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},
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&response,
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)
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if err != nil {
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resErr := util.ErrorResponse(err)
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return nil, nil, &resErr
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}
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if response.IsRejected {
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return nil, nil, &util.JSONResponse{
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Code: http.StatusNotFound,
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JSON: jsonerror.NotFound("Event not found"),
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}
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}
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if !response.RoomExists {
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return nil, nil, &util.JSONResponse{Code: http.StatusNotFound, JSON: nil}
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}
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return response.StateEvents, response.AuthChainEvents, nil
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}
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func getIDsFromEvent(events []*gomatrixserverlib.HeaderedEvent) []string {
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IDs := make([]string, len(events))
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for i := range events {
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IDs[i] = events[i].EventID()
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}
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return IDs
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}
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