中间件例子_静态文件夹

static.js

var path = require('path');
var fs = require('fs');
var url = require('url');
var app = require('express')();

var staticfile = function (req,res,next) {
    var pathname = url.parse(req.url).pathname;
    fs.readFile(path.join(ROOT, pathname), function (err, file){
        if(err){
            return next();
        }
        res.writeHead(200);
        res.end(file);
    });
};

app.use('/public', staticFile);