javascript - 在 Node.js 中通过命令行不会出现实际错误

Question

我正在尝试使用 Node.js 创建一个具有 GET 和 POST 功能的 HTTP 服务器，用户将上传图像和文件。但问题是，在尝试运行服务器时，Node.js 的命令行不会向我显示实际的错误，并指出某些不存在的行。

Server.js

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


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

    request.setEncoding("utf8");

    request.addListener("data", function(postDataChunk) { 
        postData += postDataChunk;
        console.log("Received POST data chunk ' " + 
            postDataChunk + " ' .");
    });

request.addListener("data", function(chunk) {
    //called when a new chunk of data was received
});

request.addListener("end", function() {
    //called when all chunks of data been received
});

    request.addListener("end", function() {
    route(handle, pathname, response, postData);
    });
}

    var formidable = require('formidable'),
    http = require('http'),
    sys = require('sys');

    http.createServer(function(req,res) {
        if(req.url == '/upload' && req.method.toLowerCase() == 'POST') {
            //parse a file upload
            var form = new formidable.IncomingForm();
            form.parse(req,function(err,fields,files) {
                res.writeHead(200, {'content-type' : 'text/plain'});
                res.write('received upload \n\n');
                res.end(sys.inspect({fields : fields, files : files}));
            });
            return;
        }


        //show a file upload form
        res.writeHead(200, {'content-type' : 'text/html'});
        res.end(
        '<form action = "/upload" enctype="multipart/form-data" ' +
        'method ="post">' +
        '<input type="text" name= "title" ><br>' +
        '<input type ="file" name = "upload" multiple="multiple"<br>' +
        '<input typw="submit" value="upload"' +
        '</form>');
}).listen(8888);


exports.start = start;

唯一可以肯定的是，我知道 Server.js 中正在发生这种情况，因为那里已经指出了。

server.js:69 - Unexpected token )

我怎样才能知道这个错误出在哪里？也许还有很多其他语法错误。

Answer 1

您缺少 start 函数的结束 }。尝试添加该内容并查看错误是否消失。这就是您的代码的外观(具有正确的缩进，以便更容易发现错误):

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

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

        request.setEncoding("utf8");

        request.addListener("data", function(postDataChunk) { 
            postData += postDataChunk;
            console.log("Received POST data chunk ' " + 
                postDataChunk + " ' .");
        });

        request.addListener("data", function(chunk) {
            //called when a new chunk of data was received
        });

        request.addListener("end", function() {
            //called when all chunks of data been received
        });

        request.addListener("end", function() {
        route(handle, pathname, response, postData);
        });
    }

    var formidable = require('formidable'),
    http = require('http'),
    sys = require('sys');

    http.createServer(function(req,res) {
        if(req.url == '/upload' && req.method.toLowerCase() == 'POST') {
            //parse a file upload
            var form = new formidable.IncomingForm();
            form.parse(req,function(err,fields,files) {
                res.writeHead(200, {'content-type' : 'text/plain'});
                res.write('received upload \n\n');
                res.end(sys.inspect({fields : fields, files : files}));
            });
            return;
        }

        //show a file upload form
        res.writeHead(200, {'content-type' : 'text/html'});
        res.end(
        '<form action = "/upload" enctype="multipart/form-data" ' +
        'method ="post">' +
        '<input type="text" name= "title" ><br>' +
        '<input type ="file" name = "upload" multiple="multiple"<br>' +
        '<input typw="submit" value="upload"' +
        '</form>');
    }).listen(8888);
}

exports.start = start;