node跨域cors，node ，express框架后臺設置跨域操作,路由中間件

express項目入口文件下app.js

設置跨域操作

app.all('*', function(req, res, next) {  res.header("Access-Control-Allow-Origin", "*");  res.header("Access-Control-Allow-Headers", "X-Requested-With,Content-Type");  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();  
});  
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設置中間件

// 引入路由入口文件
var all_GoodsRoute = require('./routes/all_GoodsRoute');
//設置路由中間件
app.use('/all',all_GoodsRoute);
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