Question

在我的节点测试工作中，我一直在调用这些函数，每当我调用函数时我都没有在浏览器中得到结果，万一我给出错误的“路由”然后我正确地在浏览器中重新输入错误..

为什么返回结果的函数没有出现在浏览器中？

这是我的功能：

function route (handle, pathname) {

    console.log ("About to route a request for " + pathname);

    if (typeof handle[pathname] === 'function'){

        handle[pathname](); // but nothing display in browser.

    } else {

        console.log ("No request Handler for " + pathname);

        return "404 Not Found"; //it works fine. ( display the message )

    }

}

exports.route =  route;

我的方法也被正确调用..这是我的方法：

function start() {
    return "Hello Start"; // nothing display in browser
}

function upload() {
    return "Hello Upload"; // nothing display in browser
}

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

应该是什么问题？我应该假设在浏览器中得到结果吗？

更新：

在server.js中我做了这样的改动：

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);
        response.write(content); //new change;
        response.end(); // new change;

    }

    http.createServer(onRequest).listen(8888);
    console.log ("Server has started");

}

exports.start = start;

现在我收到的错误是这样的：

[ERROR] 14:02:14 TypeError
TypeError: first argument must be a string or Buffer
    at ServerResponse.OutgoingMessage.write (http.js:743:11)
    at Server.onRequest (/Users/mohamedarif/Sites/node/server.js:16:12)
    at Server.EventEmitter.emit (events.js:99:17)
    at HTTPParser.parser.onIncoming (http.js:1928:12)
    at HTTPParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:111:23)
    at Socket.socket.ondata (http.js:1825:22)
    at TCP.onread (net.js:404:27)

这里有什么问题？

Answer 1

在路由器部分，我更新了我的功能：现在它正常工作。

function route (handle, pathname) {

    console.log ("About to route a request for " + pathname);

    if (typeof handle[pathname] === 'function'){


        return handle[pathname](); //added return;

    } else {

        console.log ("No request Handler for " + pathname);

        return "404 Not Found";

    }

}

exports.route =  route;

Node.js没有返回结果

1 个答案: