Download Pdf file using AJAX (angular)

gistfile1.js

angular.module("test-app", [])
	.controller("PDFDownloadController", ["$scope", "$http", function($scope, $http) {
		function handleResponse(response){
			var pdfFile = new Blob([response.data], { type : 'application/pdf' })
			var downloadURL = URL.createObjectURL(pdfFile);
			var link = document.createElement('a');
			link.href = downloadURL;
			link.download = "preview.pdf"
			document.body.appendChild(link);
			link.click();
		}

		$scope.loadPdf = function () {
			$http.get("file.pdf", { responseType : 'arraybuffer' }).then(handleResponse);
		};
	}])