AngularJS - Save remote PDF locally and open it using native PDF Viewer

PdfDownloadAndViewer.js

(function(){
    'use strict';

    angular.module('app.controllers')

    .controller('PdfDownloadAndViewerCtrl', function(
        $cordovaFile,
        $http,
        $cordovaFileOpener2,
        $sce
    ){
        $scope.view = function(conteudo) {

            // downloads file
            var pdfUrl = encodeURI('http://unec.edu.az/application/uploads/2014/12/pdf-sample.pdf');
            $http({
                url: pdfUrl,
                method: 'GET',
                headers: {'Content-Type': 'application/pdf'},
                responseType: 'arraybuffer'
            }).then(function(response) {
                // create blob
                try {
                    var blob = new Blob([response.data], {type : "application/pdf"});

                } catch(e) {
                    // TypeError old chrome and FF
                    window.BlobBuilder = window.BlobBuilder ||
                        window.WebKitBlobBuilder ||
                        window.MozBlobBuilder ||
                        window.MSBlobBuilder;

                    if (e.name == 'TypeError' && window.BlobBuilder) {
                        var bb = new BlobBuilder();
                        bb.append(response.data);
                        var blob = bb.getBlob("application/pdf");

                    } else if (e.name == "InvalidStateError") {
                        // InvalidStateError (tested on FF13 WinXP)
                        var blob = new Blob([response.data], {type : "application/pdf"});
                    } else {
                        console.log('We\'re screwed, blob constructor unsupported entirely');
                        return;
                    }
                }

                var objectUrl = window.URL || window.webkitURL;
                var fileURL   = objectUrl.createObjectURL(blob);
                $sce.trustAsResourceUrl(fileURL);

                var fileName = "test.pdf";

                // save file locally
                $cordovaFile.writeFile(cordova.file.dataDirectory, fileName, blob, true)
                    .then(function (success) {
                        
                        // open pdf with native PDF Viewer
                        var filePath = cordova.file.dataDirectory + fileName;
                        $cordovaFileOpener2.open(
                            filePath,
                            'application/pdf'
                          ).then(function() {
                              console.log('file opened successfully');
                          }, function(err) {
                              console.log('An error occurred. Show a message to the user');
                              console.log(JSON.stringify(err));
                          });

                    }, function (err) {
                        console.log('error saving file');
                        console.log(JSON.stringify(err));
                    });

            }).catch(function(err) {
                console.log(JSON.stringify(err));
            });
        };
    })
})()