version_check.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * A caching proxy for retrieving version information from phpmyadmin.net
   5  *
   6  * @package PhpMyAdmin
   7  */
   8
   9 // Sets up the session
  10 define('PMA_MINIMUM_COMMON', true);
  11 require_once 'libraries/common.inc.php';
  12
  13 // Get response text from phpmyadmin.net or from the session
  14 // Update cache every 6 hours
  15 if (isset($_SESSION['cache']['version_check'])
  16     && time() < $_SESSION['cache']['version_check']['timestamp'] + 3600 * 6
  17 ) {
  18     $save = false;
  19     $response = $_SESSION['cache']['version_check']['response'];
  20 } else {
  21     $save = true;
  22     $file = 'http://www.phpmyadmin.net/home_page/version.json';
  23     if (ini_get('allow_url_fopen')) {
  24         if (strlen($cfg['VersionCheckProxyUrl'])) {
  25             $context = array(
  26                 'http' => array(
  27                     'proxy' => $cfg['VersionCheckProxyUrl'],
  28                     'request_fulluri' => true
  29                 )
  30             );
  31             if (strlen($cfg['VersionCheckProxyUser'])) {
  32                 $auth = base64_encode(
  33                     $cfg['VersionCheckProxyUser'] . ':' . $cfg['VersionCheckProxyPass']
  34                 );
  35                 $context['http']['header'] = 'Proxy-Authorization: Basic ' . $auth;
  36             }
  37             $response = file_get_contents(
  38                 $file,
  39                 false,
  40                 stream_context_create($context)
  41             );
  42         } else {
  43             $response = file_get_contents($file);
  44         }
  45     } else if (function_exists('curl_init')) {
  46         $curl_handle = curl_init($file);
  47         if (strlen($cfg['VersionCheckProxyUrl'])) {
  48             curl_setopt($curl_handle, CURLOPT_PROXY, $cfg['VersionCheckProxyUrl']);
  49             if (strlen($cfg['VersionCheckProxyUser'])) {
  50                 curl_setopt(
  51                     $curl_handle,
  52                     CURLOPT_PROXYUSERPWD,
  53                     $cfg['VersionCheckProxyUser'] . ':' . $cfg['VersionCheckProxyPass']
  54                 );
  55             }
  56         }
  57         curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
  58         $response = curl_exec($curl_handle);
  59     }
  60 }
  61
  62 // Always send the correct headers
  63 header('Content-type: application/json; charset=UTF-8');
  64
  65 // Save and forward the response only if in valid format
  66 $data = json_decode($response);
  67 if (is_object($data) && strlen($data->version) && strlen($data->date)) {
  68     if ($save) {
  69         $_SESSION['cache']['version_check'] = array(
  70             'response' => $response,
  71             'timestamp' => time()
  72         );
  73     }
  74     echo $response;
  75 }
  76
  77 ?>