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Fix 500s on /state, /state_ids when state not known (#2672)

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This was due to bad error bubbling.
This commit is contained in:
Neil Alexander 2022-08-25 09:51:36 +01:00 committed by GitHub
parent 522bd2999f
commit 16156b0b09
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 23 additions and 7 deletions
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6
federationapi/routing/join.go
View file

@ -329,6 +329,12 @@ func SendJoin(
JSON: jsonerror.NotFound("Room does not exist"),
}
}
if !stateAndAuthChainResponse.StateKnown {
return util.JSONResponse{
Code: http.StatusForbidden,
JSON: jsonerror.Forbidden("State not known"),
}
}
// Check if the user is already in the room. If they're already in then
// there isn't much point in sending another join event into the room.

6
federationapi/routing/state.go
View file

@ -135,6 +135,12 @@ func getState(
return nil, nil, &resErr
}
if !response.StateKnown {
return nil, nil, &util.JSONResponse{
Code: http.StatusNotFound,
JSON: jsonerror.NotFound("State not known"),
}
}
if response.IsRejected {
return nil, nil, &util.JSONResponse{
Code: http.StatusNotFound,

1
roomserver/api/query.go
View file

@ -227,6 +227,7 @@ type QueryStateAndAuthChainResponse struct {
// Do all the previous events exist on this roomserver?
// If some of previous events do not exist this will be false and StateEvents will be empty.
PrevEventsExist bool `json:"prev_events_exist"`
StateKnown bool `json:"state_known"`
// The state and auth chain events that were requested.
// The lists will be in an arbitrary order.
StateEvents []*gomatrixserverlib.HeaderedEvent `json:"state_events"`

17
roomserver/internal/query/query.go
View file

@ -503,10 +503,11 @@ func (r *Queryer) QueryStateAndAuthChain(
}
var stateEvents []*gomatrixserverlib.Event
stateEvents, rejected, err := r.loadStateAtEventIDs(ctx, info, request.PrevEventIDs)
stateEvents, rejected, stateMissing, err := r.loadStateAtEventIDs(ctx, info, request.PrevEventIDs)
if err != nil {
return err
}
response.StateKnown = !stateMissing
response.IsRejected = rejected
response.PrevEventsExist = true
@ -542,15 +543,18 @@ func (r *Queryer) QueryStateAndAuthChain(
return err
}
func (r *Queryer) loadStateAtEventIDs(ctx context.Context, roomInfo *types.RoomInfo, eventIDs []string) ([]*gomatrixserverlib.Event, bool, error) {
// first bool: is rejected, second bool: state missing
func (r *Queryer) loadStateAtEventIDs(ctx context.Context, roomInfo *types.RoomInfo, eventIDs []string) ([]*gomatrixserverlib.Event, bool, bool, error) {
roomState := state.NewStateResolution(r.DB, roomInfo)
prevStates, err := r.DB.StateAtEventIDs(ctx, eventIDs)
if err != nil {
switch err.(type) {
case types.MissingEventError:
return nil, false, nil
return nil, false, true, nil
case types.MissingStateError:
return nil, false, true, nil
default:
return nil, false, err
return nil, false, false, err
}
}
// Currently only used on /state and /state_ids
@ -567,12 +571,11 @@ func (r *Queryer) loadStateAtEventIDs(ctx context.Context, roomInfo *types.RoomI
ctx, prevStates,
)
if err != nil {
return nil, rejected, err
return nil, rejected, false, err
}
events, err := helpers.LoadStateEvents(ctx, r.DB, stateEntries)
return events, rejected, err
return events, rejected, false, err
}
type eventsFromIDs func(context.Context, []string) ([]types.Event, error)