牛仔和jiffy websocket_handle事件

Question

我正在使用牛仔和jiffy(Json库)为我的websocket ..我可以从我的websocket_handle客户端收到数据,截至目前我有类似于此的代码

websocket_handle({text, Msg}, Req, Handle) ->
    Message = jiffy:decode(Msg),
    case Message of ?

pattern1 - > ........... pattern2 - > .......... end,{ok,Res,State}

然而,而不是这个我想在句柄级别模式匹配...

  websocket_handle({text, pattern1}, Req, State),
  websocket_handle({text, pattern2}, Req, State)

问题是我无法使用jiffy:在websocket_handle的参数中解码..所以我不能写出类似的东西

 websocket_handle({text, jiffy:decode(Msg), Req, State})

如何使它工作？

Answer 1

如果您喜欢函数签名与案例表达式中的模式匹配,则可以将解码后的消息"转发"到另一个"内部"函数.

websocket_handle({text, Msg}, Req, Handle) ->
    Message = jiffy:decode(Msg),
    websocket_handle_({test, Message}, Req, Handle).

websocket_handle_({text, Pattern1}, Req, Handle) ->
    {ok, Req, State}; 
websocket_handle_({text, Pattern2}, Req, Handle) ->
    {reply, OutFrame | [OutFrame], Req, State};
websocket_handle_({text, PatternN}, Req, Handle) ->
    {ok, Req, State}.