将字符串值解析为Object

Question

您好我有这样的问题：我有一个用swift编写的应用程序，它将带有 json 数组的值发送到 node.js ！我应该推断用户名和密码参数吗？我怎么办？

Swift代码：

// prepare json data
let json: [String: Any] = ["Username": ""+UsernameTextBox.text!,"Password": ""+PasswordTextBox.text!]

let jsonData = try? JSONSerialization.data(withJSONObject: json)

// create post request
let url = URL(string: "http://localhost:3000/login")!
var request = URLRequest(url: url)
request.httpMethod = "POST"

// insert json data to the request
request.httpBody = jsonData

let task = URLSession.shared.dataTask(with: request) { data, response, error in
    guard let data = data, error == nil else {
        print(error?.localizedDescription ?? "No data")
        return
    }
    let responseJSON = try? JSONSerialization.jsonObject(with: data, options: [])
    if let responseJSON = responseJSON as? [String: Any] {
        print(responseJSON)
    }
}

task.resume()

Node.js代码：

var express = require("express");
var myParser = require("body-parser");
var app = express();

//Login 
app.use(myParser.urlencoded({extended : true}));
   app.post("/login", function(request, response) {
     console.log(request.body); 

    });

//Application Listen on Port
app.listen(3000,function(){
    console.log("Application Server Start on Port: 3000");
})

身体记录：

新的JavaScript代码图片：

Answer 1

输出：

console.log(request.body);

是

{{"username": "something", "password": "somethingElse"}: ""}

您可以将数据的格式更改为您可以轻松访问的内容，如下所示：

{"Username": "something", "Password": "somethingElse"}

但是，如果出于某些原因，您更愿意坚持在问题中发送数据的方式，则可以使用以下方式提取用户凭据：

 var data = JSON.parse(Object.keys(request.body)[0]);
 var username = data.Username;
 var password = data.Password;

Answer 2

将扩展名更改为false并尝试此操作，您将在请求正文中获取json对象。

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

Answer 3

扩展到@edkeveked，

"/(i(?:phone|pad|pod)) OS (\d+_\d+_\d+)/i"

Answer 4

为什么在字符串上使用JSON.stringify，删除它并且您的代码应该有效：

var data = JSON.parse(Object.keys(request.body)[0]);
var username = data.Username;
var password = data.Password;

＆＃13;

＆＃13;

var body = {'{"Password":"dsdsd","Username":"dsdsdsds"}':''};

var data = JSON.parse(Object.keys(body)[0]);
var username = data.Username;
var password = data.Password;

console.log(username, password);

＆＃13;

＆＃13;

＆＃13;