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<?php
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/**
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* Smarty plugin
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*
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* @package Smarty
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* @subpackage PluginsFunction
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*/
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/**
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* Smarty {fetch} plugin
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*
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* Type: function<br>
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* Name: fetch<br>
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* Purpose: fetch file, web or ftp data and display results
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*
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* @link http://www.smarty.net/manual/en/language.function.fetch.php {fetch}
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* (Smarty online manual)
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* @author Monte Ohrt <monte at ohrt dot com>
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* @param array $params parameters
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* @param Smarty_Internal_Template $template template object
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* @return string|null if the assign parameter is passed, Smarty assigns the result to a template variable
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*/
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function smarty_function_fetch($params, $template)
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{
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if (empty($params['file'])) {
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trigger_error("[plugin] fetch parameter 'file' cannot be empty",E_USER_NOTICE);
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return;
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}
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// strip file protocol
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if (stripos($params['file'], 'file://') === 0) {
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$params['file'] = substr($params['file'], 7);
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}
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$protocol = strpos($params['file'], '://');
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if ($protocol !== false) {
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$protocol = strtolower(substr($params['file'], 0, $protocol));
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}
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if (isset($template->smarty->security_policy)) {
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if ($protocol) {
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// remote resource (or php stream, …)
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if(!$template->smarty->security_policy->isTrustedUri($params['file'])) {
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return;
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}
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} else {
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// local file
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if(!$template->smarty->security_policy->isTrustedResourceDir($params['file'])) {
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return;
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}
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}
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}
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$content = '';
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if ($protocol == 'http') {
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// http fetch
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if($uri_parts = parse_url($params['file'])) {
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// set defaults
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$host = $server_name = $uri_parts['host'];
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$timeout = 30;
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$accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*";
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$agent = "Smarty Template Engine ". Smarty::SMARTY_VERSION;
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$referer = "";
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$uri = !empty($uri_parts['path']) ? $uri_parts['path'] : '/';
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$uri .= !empty($uri_parts['query']) ? '?' . $uri_parts['query'] : '';
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$_is_proxy = false;
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if(empty($uri_parts['port'])) {
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$port = 80;
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} else {
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$port = $uri_parts['port'];
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}
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if(!empty($uri_parts['user'])) {
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$user = $uri_parts['user'];
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}
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if(!empty($uri_parts['pass'])) {
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$pass = $uri_parts['pass'];
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}
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// loop through parameters, setup headers
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foreach($params as $param_key => $param_value) {
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switch($param_key) {
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case "file":
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case "assign":
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case "assign_headers":
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break;
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case "user":
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if(!empty($param_value)) {
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$user = $param_value;
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}
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break;
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case "pass":
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if(!empty($param_value)) {
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$pass = $param_value;
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}
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break;
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case "accept":
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if(!empty($param_value)) {
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$accept = $param_value;
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}
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break;
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case "header":
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if(!empty($param_value)) {
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if(!preg_match('![\w\d-]+: .+!',$param_value)) {
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trigger_error("[plugin] invalid header format '".$param_value."'",E_USER_NOTICE);
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return;
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} else {
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$extra_headers[] = $param_value;
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}
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}
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break;
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case "proxy_host":
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if(!empty($param_value)) {
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$proxy_host = $param_value;
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}
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break;
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case "proxy_port":
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if(!preg_match('!\D!', $param_value)) {
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$proxy_port = (int) $param_value;
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} else {
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trigger_error("[plugin] invalid value for attribute '".$param_key."'",E_USER_NOTICE);
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return;
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}
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break;
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case "agent":
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if(!empty($param_value)) {
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$agent = $param_value;
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}
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break;
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case "referer":
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if(!empty($param_value)) {
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$referer = $param_value;
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}
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break;
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case "timeout":
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if(!preg_match('!\D!', $param_value)) {
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$timeout = (int) $param_value;
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} else {
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trigger_error("[plugin] invalid value for attribute '".$param_key."'",E_USER_NOTICE);
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return;
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}
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break;
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default:
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trigger_error("[plugin] unrecognized attribute '".$param_key."'",E_USER_NOTICE);
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return;
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}
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}
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if(!empty($proxy_host) && !empty($proxy_port)) {
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$_is_proxy = true;
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$fp = fsockopen($proxy_host,$proxy_port,$errno,$errstr,$timeout);
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} else {
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$fp = fsockopen($server_name,$port,$errno,$errstr,$timeout);
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}
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if(!$fp) {
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trigger_error("[plugin] unable to fetch: $errstr ($errno)",E_USER_NOTICE);
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return;
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} else {
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if($_is_proxy) {
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fputs($fp, 'GET ' . $params['file'] . " HTTP/1.0\r\n");
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} else {
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fputs($fp, "GET $uri HTTP/1.0\r\n");
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}
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if(!empty($host)) {
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fputs($fp, "Host: $host\r\n");
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}
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if(!empty($accept)) {
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fputs($fp, "Accept: $accept\r\n");
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}
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if(!empty($agent)) {
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fputs($fp, "User-Agent: $agent\r\n");
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}
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if(!empty($referer)) {
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fputs($fp, "Referer: $referer\r\n");
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}
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if(isset($extra_headers) && is_array($extra_headers)) {
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foreach($extra_headers as $curr_header) {
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fputs($fp, $curr_header."\r\n");
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}
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}
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if(!empty($user) && !empty($pass)) {
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fputs($fp, "Authorization: BASIC ".base64_encode("$user:$pass")."\r\n");
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}
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fputs($fp, "\r\n");
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while(!feof($fp)) {
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$content .= fgets($fp,4096);
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}
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fclose($fp);
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$csplit = preg_split("!\r\n\r\n!",$content,2);
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$content = $csplit[1];
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if(!empty($params['assign_headers'])) {
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$template->assign($params['assign_headers'],preg_split("!\r\n!",$csplit[0]));
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}
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}
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} else {
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trigger_error("[plugin fetch] unable to parse URL, check syntax",E_USER_NOTICE);
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return;
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}
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} else {
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$content = @file_get_contents($params['file']);
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if ($content === false) {
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throw new SmartyException("{fetch} cannot read resource '" . $params['file'] ."'");
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}
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}
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if (!empty($params['assign'])) {
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$template->assign($params['assign'], $content);
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} else {
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return $content;
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}
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}
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?> |