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// Copyright 2020 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 (
"net/http"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
)
// Peek implements the SS /peek API, handling inbound peeks
func Peek(
httpReq *http.Request,
request *gomatrixserverlib.FederationRequest,
cfg *config.FederationAPI,
rsAPI api.RoomserverInternalAPI,
roomID, peekID string,
remoteVersions []gomatrixserverlib.RoomVersion,
) util.JSONResponse {
// TODO: check if we're just refreshing an existing peek by querying the federationapi
verReq := api.QueryRoomVersionForRoomRequest{RoomID: roomID}
verRes := api.QueryRoomVersionForRoomResponse{}
if err := rsAPI.QueryRoomVersionForRoom(httpReq.Context(), &verReq, &verRes); err != nil {
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: jsonerror.InternalServerError(),
}
}
// Check that the room that the peeking server is trying to peek is actually
// one of the room versions that they listed in their supported ?ver= in
// the peek URL.
remoteSupportsVersion := false
for _, v := range remoteVersions {
if v == verRes.RoomVersion {
remoteSupportsVersion = true
break
}
}
// If it isn't, stop trying to peek the room.
if !remoteSupportsVersion {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.IncompatibleRoomVersion(verRes.RoomVersion),
}
}
// TODO: Check history visibility
// tell the peeking server to renew every hour
renewalInterval := int64(60 * 60 * 1000 * 1000)
var response api.PerformInboundPeekResponse
err := rsAPI.PerformInboundPeek(
httpReq.Context(),
&api.PerformInboundPeekRequest{
RoomID: roomID,
PeekID: peekID,
ServerName: request.Origin(),
RenewalInterval: renewalInterval,
},
&response,
)
if err != nil {
resErr := util.ErrorResponse(err)
return resErr
}
if !response.RoomExists {
return util.JSONResponse{Code: http.StatusNotFound, JSON: nil}
}
respPeek := gomatrixserverlib.RespPeek{
StateEvents: gomatrixserverlib.UnwrapEventHeaders(response.StateEvents),
AuthEvents: gomatrixserverlib.UnwrapEventHeaders(response.AuthChainEvents),
RoomVersion: response.RoomVersion,
LatestEvent: response.LatestEvent.Unwrap(),
RenewalInterval: renewalInterval,
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: respPeek,
}
}
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