解决NodeJS+Express模块的跨域访问控制问题：Access-Control-Allow-Origin

by 董龙飞

at 2013-04-18 16:06:19

original http://www.donglongfei.com/2013/04/nodejsaccess-control-allow-origin/?utm_source=rss&utm_medium=rss&utm_campaign=nodejsaccess-control-allow-origin

在一个项目上想用NodeJS，所以边学边练。第一个遇到的问题就是跨域访问控制问题。很多初学者会遇到同样问题。问题在前端的JS（http://localhost/xxx）中ajax访问后端RestAPI(http://localhost:3000/….)时(Chrome)报错： XMLHttpRequest cannot load http://localhost:3000/auth/xxx/xxx. Origin http://localhost is not allowed by Access-Control-Allow-Origin. 方案解决代码如下： var express = require('express'); var app = express(); //设置跨域访问 app.all('*', function(req, res, next) { res.header("Access-Control-Allow-Origin", "*"); res.header("Access-Control-Allow-Headers", "X-Requested-With"); res.header("Access-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(); … Continue reading →

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