Transform an object to x-www-form-urlencoded serialization

index.config.js

angular.module('engageAngularApp')
		.config(transformRequest)

	/** @ngInject */
	function transformRequest($httpProvider) {
		// Enable cross domain calls
		// $httpProvider.defaults.useXDomain = true;

		// Remove the header used to identify ajax call  that would prevent CORS from working
		// delete $httpProvider.defaults.headers.common['X-Requested-With'];

		// Use x-www-form-urlencoded Content-Type
		// $httpProvider.defaults.headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=utf-8';

		// Override $http service's default transformRequest
		$httpProvider.defaults.transformRequest = [function (data) {
			/**
			 * The workhorse; converts an object to x-www-form-urlencoded serialization.
			 * @param {Object} obj
			 * @return {String}
			 */
			var param = function (obj) {
				var query = '';
				var name, value, fullSubName, subName, subValue, innerObj, i;
				for (name in obj) {
					value = obj[name];
					if (value instanceof Array) {
						for (i = 0; i < value.length; ++i) {
							subValue = value[i];
							fullSubName = name + '[' + i + ']';
							innerObj = {};
							innerObj[fullSubName] = subValue;
							query += param(innerObj) + '&';
						}
					} else if (value instanceof Object) {
						for (subName in value) {
							subValue = value[subName];
							fullSubName = name + '[' + subName + ']';
							innerObj = {};
							innerObj[fullSubName] = subValue;
							query += param(innerObj) + '&';
						}
					} else if (value !== undefined && value !== null) {
						query += encodeURIComponent(name) + '=' + encodeURIComponent(value) + '&';
					}
				}
				return query.length ? query.substr(0, query.length - 1) : query;
			};
			// console.log(param(data));
			return (angular.isObject(data) ) ? param(data) : data;
		}];
	}