Fix #3949 : store RouterPattern before filter execute so that filter can use the pattern

router.go

@@ -750,19 +750,22 @@ func (p *ControllerRegister) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 		}
 	}
 
-	//execute middleware filters
+	if routerInfo != nil {
+		// store router pattern into context
+		context.Input.SetData("RouterPattern", routerInfo.pattern)
+	}
+
+	// execute middleware filters
 	if len(p.filters[BeforeExec]) > 0 && p.execFilter(context, urlPath, BeforeExec) {
 		goto Admin
 	}
 
-	//check policies
+	// check policies
 	if p.execPolicy(context, urlPath) {
 		goto Admin
 	}
 
 	if routerInfo != nil {
-		//store router pattern into context
-		context.Input.SetData("RouterPattern", routerInfo.pattern)
 		if routerInfo.routerType == routerTypeRESTFul {
 			if _, ok := routerInfo.methods[r.Method]; ok {
 				isRunnable = true