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GoLang 上的反射错误 - 参数太少

我有这个控制器:


package web


import (

    "net/http"

)


func init() {


}


func (controller *Controller) Index(r *http.Request) (string, int) {

    return "Testing", http.StatusOK

}

使用此处理程序:


type Application struct {

}


func (application *Application) Route(controller interface{}, route string) http.HandlerFunc {

    return func(w http.ResponseWriter, r *http.Request) {


        var ptr reflect.Value

        var value reflect.Value

        var finalMethod reflect.Value


        value = reflect.ValueOf(controller)


        // if we start with a pointer, we need to get value pointed to

        // if we start with a value, we need to get a pointer to that value

        if value.Type().Kind() == reflect.Ptr {

            ptr = value

            value = ptr.Elem()

        } else {

            ptr = reflect.New(reflect.TypeOf(controller))

            temp := ptr.Elem()

            temp.Set(value)

        }


        // check for method on value

        method := value.MethodByName(route)

        if method.IsValid() {

            finalMethod = method

        }

        // check for method on pointer

        method = ptr.MethodByName(route)

        if method.IsValid() {

            finalMethod = method

     

        }

    }

}

它是这样执行的:


controller := &web.Controller{}

application := &system.Application{}


http.HandleFunc("/", application.Route(controller, "Index"))

问题是它编译好了。它没有显示任何错误,但是当我访问该网站时,只需指向 localhost,它就会显示:


2014/12/27 22:38:16 http: panic serving 127.0.0.1:58304: reflect: Call with too few input arguments

goroutine 20 [running]:

net/http.func·011()

    /usr/local/Cellar/go/1.3.3/libexec/src/pkg/net/http/server.go:1100 +0xb7

我找不到任何错误,更奇怪的是它编译正常......我是 Go 新手,所以我不知道发生了什么......


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