POST 数据可能是分多次发送

const http=require('http');
const querystring=require('querystring');

let server=http.createServer(function(req, res){
    let arr=[];
    req.on('data', buffer=>{
        arr.push(buffer);
    });
    res.on('end', ()=>{
        let buffer = Buffer.concat(arr);
        let post =querystring.parse(buffer.toString());
    });
    console.log(post);
});
server.listen(8080);