nodejs的http.request如何发送带参数的post请求？

Question

用nodejs做代理访问外部接口系统，如何实现带参数的post请求？

var opt = {
     host:'localhost',
     port:'8888',
     method:'POST',
     path:'/getTicket',
     headers:{

     }
}

var body = '';
var req = http.request(opt, function(res) {
    console.log("Got response: " + res.statusCode);
    res.on('data',function(d){
        body += d;
    }).on('end', function(){
        console.log(res.headers)
        console.log(body)
    });
}).on('error', function(e) {
    console.log("Got error: " + e.message);
})
req.end();

以上来自nodejs文档，怎样在请求中添加参数？

Answer 1

req.end()之前加上:

data = {user:"hello",password:"world"};
req.write(require('querystring').stringify(data));

参见：http://nodejs.org/api/http.html#http_request_write_chunk_encoding

Answer 2

var postData = querystring.stringify({
  'msg' : 'Hello World!'
});

var opt = {
     host:'localhost',
     port:'8888',
     method:'POST',
     path:'/getTicket',
     headers:{
        'Content-Type': 'application/x-www-form-urlencoded',
        'Content-Length': Buffer.byteLength(postData)
     }
}