JIRA cloud plugin not able to attach a text file as an attachment

[Vikash Kumar]

I am trying to attach a text file to Jira cloud instance via Jira Plugin. I am creating blog file in the javascript and making a REST call to the server.

The call is going through successfully but it is returning empty json array in response. When I refresh the Jira issue page in the browser then I do not see any attachment.

Please find the JavaScript code snippet I am using below:

attachToTicket("Hello there", "hello.txt");

function attchToTicket(fileContent, fileName) {

 var formData = makeFile(fileContent, fileName);
 AP.require('request', function (request) {
 request({
 url: '/rest/api/2/issue/TEST-2/attachments',
 data: formData,
 type: 'POST',
 dataType: 'application/json',
 contentType: 'multipart/form-data',
 /* Keeping or removing below lines does not help either
 processData: false,
 cache: false, 
  */

 success: function (response) {
   response = JSON.parse(response);console.log(response);
 },

 error: function () {
    console.log("error: " + arguments);
 }
 });
 });
 }

 function makeFile(content, fileName) {
   var theBlob = new Blob([content], {
     type: 'text/plain; charset="UTF-8"'
   });

   var formData = new FormData();

   formData.append("file", theBlob, fileName);
   return formData;
 }

In my chrome console it shows 200 OK. Any hint on this will be of great help. 

Thank you!