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PHP Script  |  2004-10-24  |  9KB  |  221 lines
  1. <?php
  2. /**
  3.  * Smarty plugin
  4.  * @package Smarty
  5.  * @subpackage plugins
  6.  */
  7.  
  8.  
  9. /**
  10.  * Smarty {fetch} plugin
  11.  *
  12.  * Type:     function<br>
  13.  * Name:     fetch<br>
  14.  * Purpose:  fetch file, web or ftp data and display results
  15.  * @link http://smarty.php.net/manual/en/language.function.fetch.php {fetch}
  16.  *       (Smarty online manual)
  17.  * @param array
  18.  * @param Smarty
  19.  * @return string|null if the assign parameter is passed, Smarty assigns the
  20.  *                     result to a template variable
  21.  */
  22. function smarty_function_fetch($params, &$smarty)
  23. {
  24.     if (empty($params['file'])) {
  25.         $smarty->_trigger_fatal_error("[plugin] parameter 'file' cannot be empty");
  26.         return;
  27.     }
  28.  
  29.     $content = '';
  30.     if ($smarty->security && !preg_match('!^(http|ftp)://!i', $params['file'])) {
  31.         $_params = array('resource_type' => 'file', 'resource_name' => $params['file']);
  32.         require_once(SMARTY_DIR . 'core' . DIRECTORY_SEPARATOR . 'core.is_secure.php');
  33.         if(!smarty_core_is_secure($_params, $smarty)) {
  34.             $smarty->_trigger_fatal_error('[plugin] (secure mode) fetch \'' . $params['file'] . '\' is not allowed');
  35.             return;
  36.         }
  37.         
  38.         // fetch the file
  39.         if($fp = @fopen($params['file'],'r')) {
  40.             while(!feof($fp)) {
  41.                 $content .= fgets ($fp,4096);
  42.             }
  43.             fclose($fp);
  44.         } else {
  45.             $smarty->_trigger_fatal_error('[plugin] fetch cannot read file \'' . $params['file'] . '\'');
  46.             return;
  47.         }
  48.     } else {
  49.         // not a local file
  50.         if(preg_match('!^http://!i',$params['file'])) {
  51.             // http fetch
  52.             if($uri_parts = parse_url($params['file'])) {
  53.                 // set defaults
  54.                 $host = $server_name = $uri_parts['host'];
  55.                 $timeout = 30;
  56.                 $accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*";
  57.                 $agent = "Smarty Template Engine ".$smarty->_version;
  58.                 $referer = "";
  59.                 $uri = !empty($uri_parts['path']) ? $uri_parts['path'] : '/';
  60.                 $uri .= !empty($uri_parts['query']) ? '?' . $uri_parts['query'] : '';
  61.                 $_is_proxy = false;
  62.                 if(empty($uri_parts['port'])) {
  63.                     $port = 80;
  64.                 } else {
  65.                     $port = $uri_parts['port'];
  66.                 }
  67.                 if(!empty($uri_parts['user'])) {
  68.                     $user = $uri_parts['user'];
  69.                 }
  70.                 if(!empty($uri_parts['pass'])) {
  71.                     $pass = $uri_parts['pass'];
  72.                 }
  73.                 // loop through parameters, setup headers
  74.                 foreach($params as $param_key => $param_value) {
  75.                     switch($param_key) {
  76.                         case "file":
  77.                         case "assign":
  78.                         case "assign_headers":
  79.                             break;
  80.                         case "user":
  81.                             if(!empty($param_value)) {
  82.                                 $user = $param_value;
  83.                             }
  84.                             break;
  85.                         case "pass":
  86.                             if(!empty($param_value)) {
  87.                                 $pass = $param_value;
  88.                             }
  89.                             break;
  90.                         case "accept":
  91.                             if(!empty($param_value)) {
  92.                                 $accept = $param_value;
  93.                             }
  94.                             break;
  95.                         case "header":
  96.                             if(!empty($param_value)) {
  97.                                 if(!preg_match('![\w\d-]+: .+!',$param_value)) {
  98.                                     $smarty->_trigger_fatal_error("[plugin] invalid header format '".$param_value."'");
  99.                                     return;
  100.                                 } else {
  101.                                     $extra_headers[] = $param_value;
  102.                                 }
  103.                             }
  104.                             break;
  105.                         case "proxy_host":
  106.                             if(!empty($param_value)) {
  107.                                 $proxy_host = $param_value;
  108.                             }
  109.                             break;
  110.                         case "proxy_port":
  111.                             if(!preg_match('!\D!', $param_value)) {
  112.                                 $proxy_port = (int) $param_value;
  113.                             } else {
  114.                                 $smarty->_trigger_fatal_error("[plugin] invalid value for attribute '".$param_key."'");
  115.                                 return;
  116.                             }
  117.                             break;
  118.                         case "agent":
  119.                             if(!empty($param_value)) {
  120.                                 $agent = $param_value;
  121.                             }
  122.                             break;
  123.                         case "referer":
  124.                             if(!empty($param_value)) {
  125.                                 $referer = $param_value;
  126.                             }
  127.                             break;
  128.                         case "timeout":
  129.                             if(!preg_match('!\D!', $param_value)) {
  130.                                 $timeout = (int) $param_value;
  131.                             } else {
  132.                                 $smarty->_trigger_fatal_error("[plugin] invalid value for attribute '".$param_key."'");
  133.                                 return;
  134.                             }
  135.                             break;
  136.                         default:
  137.                             $smarty->_trigger_fatal_error("[plugin] unrecognized attribute '".$param_key."'");
  138.                             return;
  139.                     }
  140.                 }
  141.                 if(!empty($proxy_host) && !empty($proxy_port)) {
  142.                     $_is_proxy = true;
  143.                     $fp = fsockopen($proxy_host,$proxy_port,$errno,$errstr,$timeout);
  144.                 } else {
  145.                     $fp = fsockopen($server_name,$port,$errno,$errstr,$timeout);
  146.                 }
  147.  
  148.                 if(!$fp) {
  149.                     $smarty->_trigger_fatal_error("[plugin] unable to fetch: $errstr ($errno)");
  150.                     return;
  151.                 } else {
  152.                     if($_is_proxy) {
  153.                         fputs($fp, 'GET ' . $params['file'] . " HTTP/1.0\r\n");
  154.                     } else {
  155.                         fputs($fp, "GET $uri HTTP/1.0\r\n");
  156.                     }
  157.                     if(!empty($host)) {
  158.                         fputs($fp, "Host: $host\r\n");
  159.                     }
  160.                     if(!empty($accept)) {
  161.                         fputs($fp, "Accept: $accept\r\n");
  162.                     }
  163.                     if(!empty($agent)) {
  164.                         fputs($fp, "User-Agent: $agent\r\n");
  165.                     }
  166.                     if(!empty($referer)) {
  167.                         fputs($fp, "Referer: $referer\r\n");
  168.                     }
  169.                     if(isset($extra_headers) && is_array($extra_headers)) {
  170.                         foreach($extra_headers as $curr_header) {
  171.                             fputs($fp, $curr_header."\r\n");
  172.                         }
  173.                     }
  174.                     if(!empty($user) && !empty($pass)) {
  175.                         fputs($fp, "Authorization: BASIC ".base64_encode("$user:$pass")."\r\n");
  176.                     }
  177.  
  178.                     fputs($fp, "\r\n");
  179.                     while(!feof($fp)) {
  180.                         $content .= fgets($fp,4096);
  181.                     }
  182.                     fclose($fp);
  183.                     $csplit = split("\r\n\r\n",$content,2);
  184.  
  185.                     $content = $csplit[1];
  186.  
  187.                     if(!empty($params['assign_headers'])) {
  188.                         $smarty->assign($params['assign_headers'],split("\r\n",$csplit[0]));
  189.                     }
  190.                 }
  191.             } else {
  192.                 $smarty->_trigger_fatal_error("[plugin] unable to parse URL, check syntax");
  193.                 return;
  194.             }
  195.         } else {
  196.             // ftp fetch
  197.             if($fp = @fopen($params['file'],'r')) {
  198.                 while(!feof($fp)) {
  199.                     $content .= fgets ($fp,4096);
  200.                 }
  201.                 fclose($fp);
  202.             } else {
  203.                 $smarty->_trigger_fatal_error('[plugin] fetch cannot read file \'' . $params['file'] .'\'');
  204.                 return;
  205.             }
  206.         }
  207.  
  208.     }
  209.  
  210.  
  211.     if (!empty($params['assign'])) {
  212.         $smarty->assign($params['assign'],$content);
  213.     } else {
  214.         return $content;
  215.     }
  216. }
  217.  
  218. /* vim: set expandtab: */
  219.  
  220. ?>
  221.