javascript - Parse Array of JSON objects in NodeJS

Question

I am wondering how can I parse Array of JSON objects in NodeJS?

I want to post JSON array to the server, and be able to use the received array as a regualar JavaScript array.

Thanks in advance.

This is my front-end part that I am converting Array to String using stringify function

document.getElementById("sendJson").addEventListener("click", function () {
    $.post("/echo", JSON.stringify(QuestionsArray), function (data) {
        alert(data);
    });
})

This my back-end part that I am trying to convert Array of JSON object to Array

app.post('/echo', function (req, res) {
    var Array = JSON.parse(JSON.stringify(req.toString()));
    res.end(Array[0]["QuestionText"].toString());
});

This is Array that I am trying to sent to the server:

[  
   {  
      "QuestionText":"What is your Name",
      "QuestionType":1
   },
   {  
      "QuestionText":"Where are you from",
      "QuestionType":2,
      "ChoiceList":[  
         "US",
         "UK"
      ]
   },
   {  
      "QuestionText":"Are you married",
      "QuestionType":3,
      "ChoiceList":[  
         "Yes",
         "No"
      ]
   }
]

Here is the source code

Answer 1

In your app.js:

var bodyParser = require("body-parser");
...
app.use(bodyParser.urlencoded({extended: true}));

Then you can just use req.body to get the posted values:

app.post('/echo', function (req, res) {
    var Array = req.body.data;
    res.end(Array[0]["QuestionText"].toString());
});

In front-end, don't do any stringifying:

$.post("/echo", {data: QuestionsArray}, function (data) {
    alert(data);
});