核心提示：Ajax1.0const http=require(http);let httpServer=http.createServer((req,res)={res.setHeader(Access-Con...
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);
