var http = require('http');

//1、正常逻辑第一步正常请求，动作进行一次的方法；

function seqRequest(i,limit){

    var req = http.get({host:'www.baidu.com', port:80, path:'/',agent:false},function(res) {

        resultdata = '';

        res.on('data',function(chunk) {

            resultdata += chunk;

        });

        res.on('end',function() {

            console.log(i)

            console.log('return ' + resultdata.length);

            //2、加入循环条件

            if(i<limit){

                //3、继续执行里面加入自增

                seqRequest(i+1,limit)

            }

        });

    });

    req.on('error',function(err) {

        console.log('problem with request: ' + err.message);

    });

}

seqRequest(0,10)