GoLang 上的反射错误 - 参数太少

Question

我有这个控制器：package webimport (    "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 argumentsgoroutine 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......