對象沒有方法writeHead

Question

Rohit Rai的“ socket.IO實時Web應用程序開發”中的示例。 這是關於路由請求的第二個示例：

var http =  require("http");
var url =  require("url");

var route = {
        routes:{},
        for: function(path,handler){
            this.routes[path] = handler;
        }
};

route.for("/start", function(response,request){
        response.writeHead(200,{"Content-Type": "text/plain"});
        response.write("Hello2");
        response.end();
    }
);

route.for("/finish", function(response,request){
        response.writeHead(200, {"Content-Type": "text/plain"});
        response.write("Goodbye2");
        response.end();
    }
);

function onRequest(request,response){
    var pathname = url.parse(request.url).pathname;
    console.log("Request for: " + pathname + " received");

    if(typeof route.routes[pathname] === 'function'){
        route.routes[pathname](request,response);

   }
    else{
       response.writeHead(404,{"Content-Type": "text/plain"});
       response.end("404 Not Found!");
   }
};

http.createServer(onRequest).listen(9999);
console.log("Server has started");

控制台說服務器已經啟動，404可以工作，但是一旦我嘗試啟動或完成，我在控制台中就會收到一條錯誤消息：引用resources.js：12 TypeError Object＃沒有方法'writeHead'？

Answer 1

您在/ start和/ finish行中交換了請求和響應參數。

route.for("/start", function(request,response){
route.for("/finish", function(request,response){

那應該修復錯誤。