Javascript node.js中的Web服务器路径错误

我尝试使用node.js作为Web服务器，我的源代码分为四个模块

• index.js
• server.js
• 路由器.js
• requestHandlers.js

代码的目的是在/、/start和/upload中显示不同的页面，而如果我键入另一个路径，则会出现错误404。但是，当我将请求发送到服务器时，就会出现错误

这是我的错误：

> Server has started. Request for /start received. About to route a
> request for /start Request handler 'start' was called.
> 
> http.js:852
>     throw new TypeError('first argument must be a string or Buffer');
>           ^ TypeError: first argument must be a string or Buffer
>     at ServerResponse.OutgoingMessage.write (http.js:852:11)
>     at Server.onRequest (/Users/Alessio/Desktop/Circolare/server.js:12:14)
>     at Server.emit (events.js:98:17)
>     at HTTPParser.parser.onIncoming (http.js:2113:12)
>     at HTTPParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:122:23)
>     at Socket.socket.ondata (http.js:1971:22)
>     at TCP.onread (net.js:528:27)

index.js

var server = require("./server");
var router = require("./router");
var requestHandlers=require("./requestHandlers");

var handle={}
handle["/"]=requestHandlers.start;
handle["/start"]=requestHandlers.start;
handle["/upload"]=requestHandlers.upload;

server.start(router.route, handle);

function route(handle, pathname){
    console.log("About to route a request for " + pathname);
    if(typeof handle[pathname] === 'function'){
        handle[pathname]();
    }
    else{
        console.log("No request handler found for " + pathname);
        return "404 Not Found";
    }
}

exports.route = route;

function start(){
    console.log("Request handler 'start' was called.");
    return "Hello Start";
}

function upload(){
    console.log("Request handler 'upload' was called.");
    return "Hello Upload";
}

exports.start=start;
exports.upload=upload;

server.js这里是我出错的地方

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

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

    response.writeHead(200, {"Content-Type": "text/plain"});

    var content = route(handle, pathname); //Here the ERROR
    response.write(content);
    response.end();

  }

  http.createServer(onRequest).listen(8888);

  console.log("Server has started.");
}

exports.start = start;

router.js

var server = require("./server");
var router = require("./router");
var requestHandlers=require("./requestHandlers");

var handle={}
handle["/"]=requestHandlers.start;
handle["/start"]=requestHandlers.start;
handle["/upload"]=requestHandlers.upload;

server.start(router.route, handle);

function route(handle, pathname){
    console.log("About to route a request for " + pathname);
    if(typeof handle[pathname] === 'function'){
        handle[pathname]();
    }
    else{
        console.log("No request handler found for " + pathname);
        return "404 Not Found";
    }
}

exports.route = route;

function start(){
    console.log("Request handler 'start' was called.");
    return "Hello Start";
}

function upload(){
    console.log("Request handler 'upload' was called.");
    return "Hello Upload";
}

exports.start=start;
exports.upload=upload;

requestHandlers.js

var server = require("./server");
var router = require("./router");
var requestHandlers=require("./requestHandlers");

var handle={}
handle["/"]=requestHandlers.start;
handle["/start"]=requestHandlers.start;
handle["/upload"]=requestHandlers.upload;

server.start(router.route, handle);

function route(handle, pathname){
    console.log("About to route a request for " + pathname);
    if(typeof handle[pathname] === 'function'){
        handle[pathname]();
    }
    else{
        console.log("No request handler found for " + pathname);
        return "404 Not Found";
    }
}

exports.route = route;

function start(){
    console.log("Request handler 'start' was called.");
    return "Hello Start";
}

function upload(){
    console.log("Request handler 'upload' was called.");
    return "Hello Upload";
}

exports.start=start;
exports.upload=upload;

---

成功后，您似乎不会从

route（）

函数返回任何内容：

function route(handle, pathname){
    console.log("About to route a request for " + pathname);
    if(typeof handle[pathname] === 'function'){
        return handle[pathname]();  // <-- probably need a `return` statement here...
    }
    else{
        console.log("No request handler found for " + pathname);
        return "404 Not Found";
    }
}

功能路由（句柄、路径名）{
log（“即将路由对“+路径名”的请求）；
if（句柄类型[路径名]=“函数”）{
返回句柄[pathname]（）；//看起来您在成功时不会从
route（）函数中返回任何内容：

function route(handle, pathname){
    console.log("About to route a request for " + pathname);
    if(typeof handle[pathname] === 'function'){
        return handle[pathname]();  // <-- probably need a `return` statement here...
    }
    else{
        console.log("No request handler found for " + pathname);
        return "404 Not Found";
    }
}

功能路由（句柄、路径名）{
log（“即将路由对“+路径名”的请求）；
if（句柄类型[路径名]=“函数”）{
return handle[pathname]（）；//您可以通过向函数调用handlepathname添加一个return来更新route函数，然后它就可以工作了

function route(handle, pathname){
    console.log("About to route a request for " + pathname);
    if(typeof handle[pathname] === 'function'){
       return handle[pathname]();
    }
    else{
        console.log("No request handler found for " + pathname);
        return "404 Not Found";
    }
}

exports.route = route;

您可以通过向函数调用handlepathname添加一个return来更新route函数，它应该可以工作

function route(handle, pathname){
    console.log("About to route a request for " + pathname);
    if(typeof handle[pathname] === 'function'){
       return handle[pathname]();
    }
    else{
        console.log("No request handler found for " + pathname);
        return "404 Not Found";
    }
}

exports.route = route;

抱歉，看起来我们是同时回答的。不过接得好。抱歉，看起来我们是同时回答的。不过接得好。