Submitting data using JavaScript's POST method

Question

Submitting data using JavaScript's POST method

I am facing a challenge with posting Array data to an HTTP connector. My data is structured as follows:

var data = [{ 
    key:'myKey',
    keyName:'myKeyName',
    value:'value',
    valueName:'valueName' 
}, { 
    key:'mySecondKey', 
    keyName:'mySecondKeyName',
    value:'secondValue',
    valueName:'secondValueName'
}, ...and so on ];

When attempting to post it via Ajax like this:

$.ajax({
    type:   "POST",
    url:    url,
    data:   data,
    error:  function(){
        alert("Error");
    },
    success: function(){
        alert("OK");
    }
});

The request returns fine, but the posted data appears as

undefined=value&undefined=secondValue

I need all this information for configurations. How can I resolve this issue? Simple posts with keys and values work perfectly fine.

javascript arrays ajax http post

Answer 1

Answer №1

Assuming you are sending a POST request with a JSON payload, it is important to ensure that your payload is properly formatted as JSON. You can check the formatting using this tool:

Next, when sending the payload, utilize JSON.stringify and set the contentType:

data: JSON.stringify(data), contentType: "application/json; charset=utf-8"

If you execute this code and inspect the network tab in Chrome's Dev Tools, you will see any potential errors, but also view the formatted payload being sent to the server: http://prntscr.com/f8hf6s

var data = [{
    "key": "myKey",
    "keyName": "myKeyName",
    "value": "value",
    "valueName": "valueName"
  },
  {
    "key": "mySecondKey",
    "keyName": "mySecondKeyName",
    "value": "secondValue",
    "valueName": "secondValueName"
  }
];

var url = "http://swapi.co/api/";

$.ajax({
  type: "POST",
  url: url,
  data: JSON.stringify(data),
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  error: function() {
    alert("Error");
  },
  success: function() {
    alert("OK");
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Answer 2

Assuming you are sending a POST request with a JSON payload, it is important to ensure that your payload is properly formatted as JSON. You can check the formatting using this tool:

Next, when sending the payload, utilize JSON.stringify and set the contentType:

data: JSON.stringify(data), contentType: "application/json; charset=utf-8"

If you execute this code and inspect the network tab in Chrome's Dev Tools, you will see any potential errors, but also view the formatted payload being sent to the server: http://prntscr.com/f8hf6s

var data = [{
    "key": "myKey",
    "keyName": "myKeyName",
    "value": "value",
    "valueName": "valueName"
  },
  {
    "key": "mySecondKey",
    "keyName": "mySecondKeyName",
    "value": "secondValue",
    "valueName": "secondValueName"
  }
];

var url = "http://swapi.co/api/";

$.ajax({
  type: "POST",
  url: url,
  data: JSON.stringify(data),
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  error: function() {
    alert("Error");
  },
  success: function() {
    alert("OK");
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Submitting data using JavaScript's POST method

Answer №1

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