if bucketName != "" {
		if _, err := objAPI.GetBucketInfo(ctx, bucketName, BucketOptions{}); err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
	}

	rulesMap := event.NewRulesMap(eventNames, pattern, event.TargetID{ID: mustGetUUID()})

	setEventStreamHeaders(w)

	// Listen Publisher and peer-listen-client uses nonblocking send and hence does not wait for slow receivers.

		eventName, err := event.ParseName(ev)
		if err != nil {
			return grid.NewRemoteErr(err)
		}
		mask.MergeMaskable(eventName)
		eventNames = append(eventNames, eventName)
	}

	rulesMap := event.NewRulesMap(eventNames, pattern, event.TargetID{ID: mustGetUUID()})

	// Listen Publisher uses nonblocking publish and hence does not wait for slow subscribers.
	// Use buffered channel to take care of burst sends or slow w.Write()