Get JSON file in CI_RESTful_Error_Exception

getErrorMessage.js

/**
 * @param {string} err 
 */
let getErrorMessage = (err) => {
  // All json string will pass in this regex
  let regex = /(\{\"([^\"]+)\"\:(\w+)\,\"([^\"]+)\"\:\"([^\"]+)\"\,\"([^\"]+)\"\:\"([^\"]+)\"\})/gm
  return JSON.parse(err.match(regex)[0]);
}