//post请求的基本服务器var http=require("http");var jsonData="";http.createServer((req,res)=>{    console.log(req);    req.on("data",(chunk)=>{        jsonData+=chunk;    });    req.on("end",()=>{        console.log("???");        console.log(jsonData);        var reqObj=JSON.parse(jsonData);        console.log(reqObj);        var resObj={            message:"hello "+reqObj.name,            question:"Are you "+reqObj.age+" age ?"        };        res.writeHead(200);        res.end(JSON.stringify(resObj));   });    console.log("??");}).listen(8080);console.log("???");var options={    host:"127.0.0.1",    path:"/",    port:"8080",    method:"POST"};var req=http.request(options,(response)=>{    console.log("????");    var responseData="";    response.on("data",(chunk)=>{        responseData+=chunk;    });    response.on("end",()=>{        var dataObj=JSON.parse(responseData);        console.log("Raw Response : "+responseData);        console.log("Message : "+dataObj.message);        console.log("Question : "+dataObj.question);    });    console.log("?????");});req.write('{"name":"Soul","age":21}');req.end();console.log("????????");

　　　

代码初次执行结果(注意代码的执行顺序)：

　

浏览器发出请求后的结果(注意代码执行的内容)：

 ===>