code review

Author: wuhua3

cluster/clusterSelector.go

@@ -22,7 +22,7 @@ func (d *DefaultClusterSelector) Init(clusterGroup motan.ClusterGroup) {
 }
 
 func (d *DefaultClusterSelector) Select(request motan.Request) motan.Cluster {
-	routeGroup := strings.TrimSpace(request.GetAttachment(MRouteGroup))
+	routeGroup := request.GetAttachment(MRouteGroup)
 	if routeGroup != "" {
 		var sandboxGroup string
 		var greyGroup string
@@ -32,7 +32,7 @@ func (d *DefaultClusterSelector) Select(request motan.Request) motan.Cluster {
 		if d.defaultGreyCluster != nil && len(d.defaultGreyCluster.GetRefers()) > 0 {
 			greyGroup = d.defaultGreyCluster.GetURL().Group
 		}
-		if sandboxGroup != "" && routeGroup == DefaultSandboxRouteGroup {
+		if sandboxGroup != "" && strings.TrimSpace(routeGroup) == DefaultSandboxRouteGroup {
 			return d.defaultSandboxCluster
 		}
 		routeGroupList := motan.TrimSplit(routeGroup, ",")