package routing import ( "context" "fmt" "net/http" "strconv" "github.com/matrix-org/gomatrixserverlib" "github.com/matrix-org/gomatrixserverlib/fclient" "github.com/matrix-org/gomatrixserverlib/spec" "github.com/matrix-org/util" "github.com/matrix-org/dendrite/clientapi/httputil" roomserverAPI "github.com/matrix-org/dendrite/roomserver/api" ) type PublicRoomReq struct { Since string `json:"since,omitempty"` Limit int16 `json:"limit,omitempty"` Filter filter `json:"filter,omitempty"` IncludeAllNetworks bool `json:"include_all_networks,omitempty"` NetworkID string `json:"third_party_instance_id,omitempty"` } type filter struct { SearchTerms string `json:"generic_search_term,omitempty"` RoomTypes []string `json:"room_types,omitempty"` } // GetPostPublicRooms implements GET and POST /publicRooms func GetPostPublicRooms(req *http.Request, rsAPI roomserverAPI.FederationRoomserverAPI) util.JSONResponse { var request PublicRoomReq if fillErr := fillPublicRoomsReq(req, &request); fillErr != nil { return *fillErr } if request.Limit == 0 { request.Limit = 50 } response, err := publicRooms(req.Context(), request, rsAPI) if err != nil { return spec.InternalServerError() } return util.JSONResponse{ Code: http.StatusOK, JSON: response, } } func publicRooms( ctx context.Context, request PublicRoomReq, rsAPI roomserverAPI.FederationRoomserverAPI, ) (*fclient.RespPublicRooms, error) { var response fclient.RespPublicRooms var limit int16 var offset int64 limit = request.Limit offset, err := strconv.ParseInt(request.Since, 10, 64) // ParseInt returns 0 and an error when trying to parse an empty string // In that case, we want to assign 0 so we ignore the error if err != nil && len(request.Since) > 0 { util.GetLogger(ctx).WithError(err).Error("strconv.ParseInt failed") return nil, err } if request.IncludeAllNetworks && request.NetworkID != "" { return nil, fmt.Errorf("include_all_networks and third_party_instance_id can not be used together") } var queryRes roomserverAPI.QueryPublishedRoomsResponse err = rsAPI.QueryPublishedRooms(ctx, &roomserverAPI.QueryPublishedRoomsRequest{ NetworkID: request.NetworkID, }, &queryRes) if err != nil { util.GetLogger(ctx).WithError(err).Error("QueryPublishedRooms failed") return nil, err } response.TotalRoomCountEstimate = len(queryRes.RoomIDs) if offset > 0 { response.PrevBatch = strconv.Itoa(int(offset) - 1) } nextIndex := int(offset) + int(limit) if response.TotalRoomCountEstimate > nextIndex { response.NextBatch = strconv.Itoa(nextIndex) } if offset < 0 { offset = 0 } if nextIndex > len(queryRes.RoomIDs) { nextIndex = len(queryRes.RoomIDs) } roomIDs := queryRes.RoomIDs[offset:nextIndex] response.Chunk, err = fillInRooms(ctx, roomIDs, rsAPI) return &response, err } // fillPublicRoomsReq fills the Limit, Since and Filter attributes of a GET or POST request // on /publicRooms by parsing the incoming HTTP request // Filter is only filled for POST requests func fillPublicRoomsReq(httpReq *http.Request, request *PublicRoomReq) *util.JSONResponse { if httpReq.Method == http.MethodGet { limit, err := strconv.Atoi(httpReq.FormValue("limit")) // Atoi returns 0 and an error when trying to parse an empty string // In that case, we want to assign 0 so we ignore the error if err != nil && len(httpReq.FormValue("limit")) > 0 { util.GetLogger(httpReq.Context()).WithError(err).Error("strconv.Atoi failed") reqErr := spec.InternalServerError() return &reqErr } request.Limit = int16(limit) request.Since = httpReq.FormValue("since") return nil } else if httpReq.Method == http.MethodPost { return httputil.UnmarshalJSONRequest(httpReq, request) } return &util.JSONResponse{ Code: http.StatusMethodNotAllowed, JSON: spec.NotFound("Bad method"), } } // due to lots of switches func fillInRooms(ctx context.Context, roomIDs []string, rsAPI roomserverAPI.FederationRoomserverAPI) ([]fclient.PublicRoom, error) { avatarTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.avatar", StateKey: ""} nameTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.name", StateKey: ""} canonicalTuple := gomatrixserverlib.StateKeyTuple{EventType: spec.MRoomCanonicalAlias, StateKey: ""} topicTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.topic", StateKey: ""} guestTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.guest_access", StateKey: ""} visibilityTuple := gomatrixserverlib.StateKeyTuple{EventType: spec.MRoomHistoryVisibility, StateKey: ""} joinRuleTuple := gomatrixserverlib.StateKeyTuple{EventType: spec.MRoomJoinRules, StateKey: ""} var stateRes roomserverAPI.QueryBulkStateContentResponse err := rsAPI.QueryBulkStateContent(ctx, &roomserverAPI.QueryBulkStateContentRequest{ RoomIDs: roomIDs, AllowWildcards: true, StateTuples: []gomatrixserverlib.StateKeyTuple{ nameTuple, canonicalTuple, topicTuple, guestTuple, visibilityTuple, joinRuleTuple, avatarTuple, {EventType: spec.MRoomMember, StateKey: "*"}, }, }, &stateRes) if err != nil { util.GetLogger(ctx).WithError(err).Error("QueryBulkStateContent failed") return nil, err } chunk := make([]fclient.PublicRoom, len(roomIDs)) i := 0 for roomID, data := range stateRes.Rooms { pub := fclient.PublicRoom{ RoomID: roomID, } joinCount := 0 var joinRule, guestAccess string for tuple, contentVal := range data { if tuple.EventType == spec.MRoomMember && contentVal == "join" { joinCount++ continue } switch tuple { case avatarTuple: pub.AvatarURL = contentVal case nameTuple: pub.Name = contentVal case topicTuple: pub.Topic = contentVal case canonicalTuple: if _, _, err := gomatrixserverlib.SplitID('#', contentVal); err == nil { pub.CanonicalAlias = contentVal } case visibilityTuple: pub.WorldReadable = contentVal == "world_readable" // need both of these to determine whether guests can join case joinRuleTuple: joinRule = contentVal case guestTuple: guestAccess = contentVal } } if joinRule == spec.Public && guestAccess == "can_join" { pub.GuestCanJoin = true } pub.JoinedMembersCount = joinCount chunk[i] = pub i++ } return chunk, nil }