CORS两种跨域方法示例讲解

ajax1.0

const http=require('http');

let httpserver=http.createserver((req,res)=>{
res.setheader('access-control-allow-origin','*');
res.write('aaaa');
res.end();
});

httpserver.listen(8080);

ajax2.0

const http=require('http');
let allowhosts=['taobao.com','baidu.com'];
let httpserver=http.createserver((req,res)=>{
if(allowhosts.indexof(req.headers['origin'])!=-1){
res.setheader('access-control-allow-origin','*');
}
res.write('aaaa');
res.end();
});

httpserver.listen(8080);