system/helpers/remote.php

   1 <?php defined('SYSPATH') OR die('No direct access allowed.');
   2 /**
   3  * Remote url/file helper.
   4  *
   5  * $Id: remote.php 3917 2009-01-21 03:06:22Z zombor $
   6  *
   7  * @package    Core
   8  * @author     Kohana Team
   9  * @copyright  (c) 2007-2008 Kohana Team
  10  * @license    http://kohanaphp.com/license.html
  11  */
  12 class remote {
  13
  14         public static function status($url)
  15         {
  16                 if ( ! valid::url($url, 'http'))
  17                         return FALSE;
  18
  19                 // Get the hostname and path
  20                 $url = parse_url($url);
  21
  22                 if (empty($url['path']))
  23                 {
  24                         // Request the root document
  25                         $url['path'] = '/';
  26                 }
  27
  28                 // Open a remote connection
  29                 $remote = fsockopen($url['host'], 80, $errno, $errstr, 5);
  30
  31                 if ( ! is_resource($remote))
  32                         return FALSE;
  33
  34                 // Set CRLF
  35                 $CRLF = "\r\n";
  36
  37                 // Send request
  38                 fwrite($remote, 'HEAD '.$url['path'].' HTTP/1.0'.$CRLF);
  39                 fwrite($remote, 'Host: '.$url['host'].$CRLF);
  40                 fwrite($remote, 'Connection: close'.$CRLF);
  41                 fwrite($remote, 'User-Agent: Kohana Framework (+http://kohanaphp.com/)'.$CRLF);
  42
  43                 // Send one more CRLF to terminate the headers
  44                 fwrite($remote, $CRLF);
  45
  46                 while ( ! feof($remote))
  47                 {
  48                         // Get the line
  49                         $line = trim(fgets($remote, 512));
  50
  51                         if ($line !== '' AND preg_match('#^HTTP/1\.[01] (\d{3})#', $line, $matches))
  52                         {
  53                                 // Response code found
  54                                 $response = (int) $matches[1];
  55
  56                                 break;
  57                         }
  58                 }
  59
  60                 // Close the connection
  61                 fclose($remote);
  62
  63                 return isset($response) ? $response : FALSE;
  64         }
  65
  66 } // End remote