//express_demo.js 文件2 var express = require(‘express‘);3 var bodyParser = require(‘body-parser‘);4 var app = express();5 6 app.all(‘*‘, function(req, res, next) {7 // TODO 支持跨域访问8 res.setHeader("Access-Control-Allow-Origin", "*");9 res.setHeader("Access-Control-Allow-Credentials", "true");10 res.setHeader("Access-Control-Allow-Methods", "*");11 res.setHeader("Acce...