download file and save to private ios directory

gistfile1.txt

function getFileAndSave (filename, url) {
        var file_obj = {
            file: filename,
            url: url,
            path: null
        };

        var testFile = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory);
        var privateDocFolder = testFile.nativePath.replace('Documents/', '');
        privateDocFolder += 'Library/Private%20Documents/';
        if (Ti.Platform.getOsname() === 'android') {
            if (Ti.Filesystem.isExternalStoragePresent()) {
                privateDocFolder = Ti.Filesystem.externalStorageDirectory;
            } else {
                privateDocFolder = Ti.Filesystem.applicationDataDirectory
            }
            var nomediafile = Ti.Filesystem.getFile(privateDocFolder, '.nomedia');
            if (!nomediafile.exists()) {
                nomediafile.write(' ');
            }
        }

        var cacheBuster = new Date();

        var file = Ti.Filesystem.getFile(privateDocFolder, filename);
        var localFile = Ti.Filesystem.getFile(privateDocFolder + '/' + url);

        var cacheString = '';
        if (Ti.Platform.osname !== 'android') {
            cacheString += '?cacheBuster=' + cacheBuster.getTime();
        }

        if (file.exists()) {
            file_obj.path = privateDocFolder;
            return file_obj.path + '/' + filename + cacheString;
        } else if (localFile.exists()) {
            return privateDocFolder + '/' + url + cacheString;
        } else {
            if (Ti.Network.online) {
                if (Ti.Network.networkType == Ti.Network.NETWORK_WIFI) {
                    var c = Ti.Network.createHTTPClient();
                    c.setTimeout(10000);
                    c.onload = function () {
                        if (c.status == 200) {
                            var dir = privateDocFolder;
                            var folder = Ti.Filesystem.getFile(dir);
                            if (!folder.exists()) {
                                folder.createDirectory();
                            }

                            var f = Ti.Filesystem.getFile(dir, filename);
                            f.write(this.responseData);

                            file_obj.path = dir + Ti.Filesystem.separator;
                        } else {
                            file_obj.error = 'file not found'; // to set some errors codes
                        }

                    };
                    c.ondatastream = function () {
                        //if (fn_progress) fn_progress(e.progress);
                    };
                    c.error = function (e) {
                        file_obj.error = e.error;
                    };
                    c.open('GET', url);
                    c.send();
                }
            } else {
                file_obj.url = '';
                file_obj.error = 'no internet';
            }
            return file_obj.url;

        }
    }