http.php
81 lines
| 1 | <?php |
| 2 | /** |
| 3 | * @package VikAppointments |
| 4 | * @subpackage core |
| 5 | * @author E4J s.r.l. |
| 6 | * @copyright Copyright (C) 2021 E4J s.r.l. All Rights Reserved. |
| 7 | * @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL |
| 8 | * @link https://vikwp.com |
| 9 | */ |
| 10 | |
| 11 | // No direct access |
| 12 | defined('ABSPATH') or die('No script kiddies please!'); |
| 13 | |
| 14 | /** |
| 15 | * Implementor used to extract an iCalendar from remote URL. |
| 16 | * |
| 17 | * @since 1.7.3 |
| 18 | */ |
| 19 | class VAPIcalReaderHttp implements VAPIcalReader |
| 20 | { |
| 21 | /** |
| 22 | * The remote URL. |
| 23 | * |
| 24 | * @var string |
| 25 | */ |
| 26 | protected $url; |
| 27 | |
| 28 | /** |
| 29 | * The request headers. |
| 30 | * |
| 31 | * @var array |
| 32 | */ |
| 33 | protected $headers; |
| 34 | |
| 35 | /** |
| 36 | * Class constructor. |
| 37 | * |
| 38 | * @param string $url |
| 39 | * @param array $headers |
| 40 | */ |
| 41 | public function __construct($url, array $headers = []) |
| 42 | { |
| 43 | $this->url = $url; |
| 44 | |
| 45 | /** |
| 46 | * Include a user agent to prevent a redirect with Outlook calendar. |
| 47 | * |
| 48 | * @since 1.7.8 |
| 49 | */ |
| 50 | $this->headers = array_merge([ |
| 51 | 'User-Agent' => 'E4J\\VikAppointments ' . VIKAPPOINTMENTS_SOFTWARE_VERSION, |
| 52 | ], $headers); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Extracts the iCalendar buffer from a remote host. |
| 57 | * |
| 58 | * @return string The iCalendar string. |
| 59 | */ |
| 60 | public function load() |
| 61 | { |
| 62 | $http = new JHttp(); |
| 63 | |
| 64 | // replace WEBCAL scheme with HTTPS, because cURL may not support it |
| 65 | $url = preg_replace("/^webcal:\/\//", 'https://', $this->url); |
| 66 | |
| 67 | // make GET request |
| 68 | $response = $http->get($url, $this->headers); |
| 69 | |
| 70 | if ($response->code != 200) |
| 71 | { |
| 72 | // fetch error from body (ignore HTML tags) |
| 73 | $error = strip_tags($response->body); |
| 74 | |
| 75 | throw new Exception($error ? $error : 'Error', $response->code); |
| 76 | } |
| 77 | |
| 78 | return $response->body; |
| 79 | } |
| 80 | } |
| 81 |