| 1 | <?php |
| 2 | /* |
| 3 | +--------------------------------------------------------------------+ |
| 4 | | CiviCRM version 4.4 | |
| 5 | +--------------------------------------------------------------------+ |
| 6 | | Copyright CiviCRM LLC (c) 2004-2013 | |
| 7 | +--------------------------------------------------------------------+ |
| 8 | | This file is a part of CiviCRM. | |
| 9 | | | |
| 10 | | CiviCRM is free software; you can copy, modify, and distribute it | |
| 11 | | under the terms of the GNU Affero General Public License | |
| 12 | | Version 3, 19 November 2007 and the CiviCRM Licensing Exception. | |
| 13 | | | |
| 14 | | CiviCRM is distributed in the hope that it will be useful, but | |
| 15 | | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
| 17 | | See the GNU Affero General Public License for more details. | |
| 18 | | | |
| 19 | | You should have received a copy of the GNU Affero General Public | |
| 20 | | License and the CiviCRM Licensing Exception along | |
| 21 | | with this program; if not, contact CiviCRM LLC | |
| 22 | | at info[AT]civicrm[DOT]org. If you have questions about the | |
| 23 | | GNU Affero General Public License or the licensing of CiviCRM, | |
| 24 | | see the CiviCRM license FAQ at http://civicrm.org/licensing | |
| 25 | +--------------------------------------------------------------------+ |
| 26 | */ |
| 27 | |
| 28 | /** |
| 29 | * |
| 30 | * @package CRM |
| 31 | * @copyright CiviCRM LLC (c) 2004-2013 |
| 32 | * $Id: $ |
| 33 | * |
| 34 | */ |
| 35 | |
| 36 | /** |
| 37 | * Simple static helpers for network operations |
| 38 | */ |
| 39 | class CRM_Utils_Network { |
| 40 | /** |
| 41 | * Try connecting to a TCP service; if it fails, retry. Repeat until serverStartupTimeOut elapses. |
| 42 | * |
| 43 | * @param int $serverStartupTimeOut seconds |
| 44 | * @param float $interval seconds to wait in between pollings |
| 45 | * @return bool TRUE if service is online |
| 46 | */ |
| 47 | public static function waitForServiceStartup($host, $port, $serverStartupTimeOut, $interval = 0.333) { |
| 48 | $start = time(); |
| 49 | $end = $start + $serverStartupTimeOut; |
| 50 | $found = FALSE; |
| 51 | $interval_usec = (int) 1000000 * $interval; |
| 52 | |
| 53 | while (!$found && $end >= time()) { |
| 54 | $found = self::checkService($host, $port, $end - time()); |
| 55 | if ($found) { |
| 56 | return TRUE; |
| 57 | } |
| 58 | usleep($interval_usec); |
| 59 | } |
| 60 | return FALSE; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Check whether a TCP service is available on $host and $port |
| 65 | */ |
| 66 | public static function checkService($host, $port, $serverConnectionTimeOut) { |
| 67 | $old_error_reporting = error_reporting(); |
| 68 | error_reporting($old_error_reporting & ~E_WARNING); |
| 69 | try { |
| 70 | $fh = fsockopen($host, $port, $errno, $errstr, $serverConnectionTimeOut); |
| 71 | if ($fh) { |
| 72 | fclose($fh); |
| 73 | error_reporting($old_error_reporting); |
| 74 | return TRUE; |
| 75 | } |
| 76 | } catch (Exception $e) { |
| 77 | } |
| 78 | error_reporting($old_error_reporting); |
| 79 | return FALSE; |
| 80 | } |
| 81 | } |