SuperAgent Node.js连接被拒绝

$curl http://localhost:5000/
{"you": "looking good"}

$node
> var request = require("superagent");
> var req = request.get("http://localhost:5000/").on('error',function (err) {
    console.log("There's an emergency is going on.",err)
  }).end(function (data) {
    console.log("All is well",data.body)
  });

There's an emergency is going on. { [Error: connect ECONNREFUSED]
  code: 'ECONNREFUSED',errno: 'ECONNREFUSED',syscall: 'connect' }

我做了什么假设打破了这个？我实际上是在编写同构JavaScript和完全相同的代码,使浏览器上的http查询工作正常！