scala – Basic Play 2.0找不到WebSocket请求标头

这是我现在在做什么：

>在我的控制器中定义WebSocket：

def wsrequest = WebSocket.using[String] { request =>

  // Send a single 'Hello!' message 
  val out = Enumerator("Hello!") 

 // Just consume and ignore the input
  val in = Iteratee.consume[String]()

  // tie the in and out values to each other
  (in,out)
}

>在我的路由文件中添加路由

GET     /wsrequest                  controllers.Application.wsrequest

>在我的index.scala.html中的javascript中使用以下内容：

var sock = new WS("@routes.Application.wsrequest().webSocketURL()")

但是,当我尝试编译这个我收到一个错误：

[info] Compiling 5 Scala sources and 1 Java source to targetscala-2.9.1classes...
[error] targetscala-2.9.1src_managedmainviewshtmlindex.template.scala:32: Cannot find any HTTP Request Header here
[error] Error occurred in an application involving default arguments.
[error]             var sock = new WS(""""),_display_(Seq[Any](/*11.33*/routes/*11.39*/.Application.wsrequest().webSocketURL())),format.raw/*11.78*/("""")
[error]                                                                                                                     ^
[error] one error found

我错过了一步吗？还是我以前做过的错误？