NodeJS-服务资源错误

Question

I installed express using npm in VS. But i have empty exception in lines started with app.use in server.js :

'use strict';
var http = require('http');
var port = process.env.PORT || 1337;

var express = require('express');
var app = express();

app.use("/css", express.static(path.join(__dirname, 'public', 'css')));
app.use("/fonts", express.static(path.join(__dirname, 'public', 'ttf')));
app.use("/images", express.static(path.join(__dirname, 'public', 'png')));
app.use("/scripts", express.static(path.join(__dirname, 'public', 'js')));


http.createServer(function (req, res) {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.end(loadCore());
}).listen(port);

I want to serve css, ttf, png, jpg and also just js files existed in scripts folder. How should i do this?

Edit

I finally changed my server like this; i write it here in case might help anyone:

'use strict';
var http = require('http');
var path = require('path');
var port = process.env.PORT || 1337;

var express = require('express');
var app = express();

app.use("/css", express.static(path.join(__dirname, 'public', 'css')));
app.use("/fonts", express.static(path.join(__dirname, 'public', 'fonts')));
app.use("/images", express.static(path.join(__dirname, 'public', 'images')));
app.use("/scripts", express.static(path.join(__dirname, 'public', 'scripts')));

app.get('/',//to serve application
    function (req, res) {
        res.send(loadCore());
    }
);
app.get('/service',//to serve service
    function (req, res) {
        res.send("[SERVICE]");
    }
);
app.listen(port);

My css files is in public/css folder; i mapped it to localhost:port/css/ using this:

app.use("/css", express.static(path.join(__dirname, 'public', 'css')));

Answer 1

You seem to miss

var path = require('path');

somewhere at the beginning. Otherwise the path variable doesn't point to anything.

Similar issue will, however, occur with loadCore function that doesn't seem to be defined either.