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// Copyright 2020-2024 New Vector Ltd.
//
// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
// Please see LICENSE files in the repository root for full details.
package routing
import (
"net/http"
"github.com/element-hq/dendrite/roomserver/api"
"github.com/element-hq/dendrite/roomserver/types"
"github.com/element-hq/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/gomatrixserverlib/fclient"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/matrix-org/util"
)
// Peek implements the SS /peek API, handling inbound peeks
func Peek(
httpReq *http.Request,
request *fclient.FederationRequest,
cfg *config.FederationAPI,
rsAPI api.FederationRoomserverAPI,
roomID, peekID string,
remoteVersions []gomatrixserverlib.RoomVersion,
) util.JSONResponse {
// TODO: check if we're just refreshing an existing peek by querying the federationapi
roomVersion, err := rsAPI.QueryRoomVersionForRoom(httpReq.Context(), roomID)
if err != nil {
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.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 == roomVersion {
remoteSupportsVersion = true
break
}
}
// If it isn't, stop trying to peek the room.
if !remoteSupportsVersion {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.IncompatibleRoomVersion(string(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 := fclient.RespPeek{
StateEvents: types.NewEventJSONsFromHeaderedEvents(response.StateEvents),
AuthEvents: types.NewEventJSONsFromHeaderedEvents(response.AuthChainEvents),
RoomVersion: response.RoomVersion,
LatestEvent: response.LatestEvent.PDU,
RenewalInterval: renewalInterval,
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: respPeek,
}
}
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