Node.JS：如何使用请求模块发送带有表单数据的标头

我终于设法做到了。在下面的代码段中回答：

var querystring = require('querystring');var request = require('request');var form = {    username: 'usr',    password: 'pwd',    opaque: 'opaque',    logintype: '1'};var formData = querystring.stringify(form);var contentLength = formData.length;request({    headers: {      'Content-Length': contentLength,      'Content-Type': 'application/x-www-form-urlenpred'    },    uri: 'http://myUrl',    body: formData,    method: 'POST'  }, function (err, res, body) {    //it works!  });