beego: support namespace

ns := beego.NewNamespace("/v1/api/")
ns.Cond(func(ctx *context.Context)bool{
	    if ctx.Input.Domain() == "www.beego.me" {
	    	return true
	    }
	    return false
	})
.Filter("before", Authenticate)
.Router("/order",	&admin.OrderController{})
.Get("/version",func (ctx *context.Context) {
	ctx.Output.Body([]byte("1.0.0"))
})
.Post("/login",func (ctx *context.Context) {
	if ctx.Query("username") == "admin" && ctx.Query("username") ==
"password" {

	}
})
.Namespace(
	NewNamespace("/shop").
		Get("/order/:id", func(ctx *context.Context) {
		ctx.Output.Body([]byte(ctx.Input.Param(":id")))
	}),
)

router.go

@@ -69,6 +69,7 @@ type controllerInfo struct {
 	handler        http.Handler
 	runfunction    FilterFunc
 	routerType     int
+	isPrefix       bool
 }
 
 // ControllerRegistor containers registered router rules, controller handlers and filters.
@@ -277,11 +278,16 @@ func (p *ControllerRegistor) AddMethod(method, pattern string, f FilterFunc) {
 	}
 }
 
-func (p *ControllerRegistor) Handler(pattern string, h http.Handler) {
+func (p *ControllerRegistor) Handler(pattern string, h http.Handler, options ...interface{}) {
 	paramnums, params, parts := p.splitRoute(pattern)
 	route := &controllerInfo{}
 	route.routerType = routerTypeHandler
 	route.handler = h
+	if len(options) > 0 {
+		if v, ok := options[0].(bool); ok {
+			route.isPrefix = v
+		}
+	}
 	if paramnums == 0 {
 		route.pattern = pattern
 		p.fixrouters = append(p.fixrouters, route)
@@ -446,6 +452,7 @@ func (p *ControllerRegistor) AddFilter(pattern, action string, filter FilterFunc
 	if err != nil {
 		return err
 	}
+
 	switch action {
 	case "BeforeRouter":
 		p.filters[BeforeRouter] = append(p.filters[BeforeRouter], mr)
@@ -760,6 +767,14 @@ func (p *ControllerRegistor) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 					break
 				}
 			}
+			if route.routerType == routerTypeHandler && route.isPrefix &&
+				strings.HasPrefix(requestPath, route.pattern) {
+
+				routerInfo = route
+				runrouter = route.controllerType
+				findrouter = true
+				break
+			}
 		}
 	}