nodejs post请求

function form(callBack)
{
    
 
var data = {  
    username: 'admin',  
    password: "123"  
}; 

var postData = require('querystring').stringify(data);  
    var options = {  
        method: "POST",  
        host: "test.xx.cn",  
        port: 8001,  
        path: "/api/MyApi/test1",  
        headers: {  
            "Content-Type": 'application/x-www-form-urlencoded',  
            "Content-Length": postData.length  
        }  
    };  
    console.log( options ); 
    var body = ''; 
    var request = http.request( options, function(res) {  
        // show results  
        console.log('STATUS: ' + res.statusCode);    
        res.setEncoding('utf8');  
        res.on('data', function(chunk) {  
            body += chunk;
            console.log('BODY: ' + chunk);  
        });  
  
        res.on('end', function(err) {  
            console.log( ' complete.');  
            callBack(body);
        });  
    });  
        request.on("error", function(e) {  
            console.log('upload Error: ' + e.message);  
        });
        request.write(postData);
        request.end();
}
function data_(d){
console.log("获取返回数据:"+d);
}
form(data_);