如何删除node.js中的“__proto __”：{}

Question

大家好我有这样的代码

var BaseController = require("./Base"),
    View = require("../views/Base"),
    model = new (require("../models/ContentModel"));

module.exports = BaseController.extend({ 
    name: "insertUser",
    content: null,
    run: function(req, res, next) {
        model.setDB(req.db);
        var self = this;
        req.body = _.omit(req.body, '__proto__');
       res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    res.writeHead(200, { 'Content-Type': 'application/json' }); 
      res.end(JSON.stringify(req.body));

        /*this.getContent(function() {
        //  var v = new View(res, 'place');
        res.setHeader('Content-Type', 'application/json');
    res.send(JSON.stringify(self.content));


        });*/
       // console.log("go to hell");


    },

但它正在向我发送此格式的回复

{ “{\” 代码\ “：\” OU4 \ n \u0013|é\ “\ ”年龄\“：25} ”：“”， “的原”：{} }

我只想删除“ proto ”：{}或者特别是sal我希望得到像这样的输出

"{\"code\":\"Øù4\\n\\u0013¦é\",\"Age\":25}"

请你们查看我犯错误或错误的地方

好吧，我通过这个过程将ajax请求发送给控制器

function encryptCode()
{
  var value = document.getElementById("code").value;
  var key = "secretKeyToProvide";  /*--Provide Your secret key here--*/
  var codeValue = rc4(key, value);
  var arr = {code:codeValue, Age:25};




            var request = 
            $.ajax({
                url: "http://localhost:3000/insertUser",
                type: "POST",
                data: JSON.stringify(arr),
                dataType: 'json',
                async: false,
                contentType: "application/x-www-form-urlencoded", //This is what made the difference.

            });  

        request.success(function(result) {
            var value =  JSON.stringify(result);
            alert(value);

        });

        request.fail(function(jqXHR, textStatus) {
            alert("Request failed: " + textStatus);
        });

}

如何摆脱这种“ proto ”