NODE.JS跨域问题的完美解决方案

var express = require('express');
var app = express();
//设置跨域访问
app.all('', function(req, res, next) {
res.header("Aess-Control-Allow-Origin", "");
res.header("Aess-Control-Allow-Headers", "X-Requested-With");
res.header("Aess-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
res.header("X-Powered-By",' 3.2.1');
res.header("Content-Type", "application/json;charset=utf-8");
next();
});
//app.listen(8088);