如果是nodejs 自带的http, 大概这样，没验证过, 如是express就可能简单的多：

 http.createServer(function(req, res) {
 if ('POST' == req.method) {
  var body = ''
  req.on('data', function(chunk) {
    body += chunk
  })
  req.on('end', function() {
    console.log(body)
    var j = JSON.parse(body)
    res.end('end')
  })
}

}).listen(8080);

@beiyio 可能你是get而不是post, 用curl post试下：

curl -H "Accept: application/json" -H "Content-type: application/json" -X POST -d '{"interfaceid":'1002',"mac": "cat","gameid":"23","uid":"3000"}' http://localhost:1337