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rexy |
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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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* Type: function
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* Name: fetch
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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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*
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* @param array $params parameters
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* @param Smarty_Internal_Template $template template object
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*
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* @throws SmartyException
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* @return string|null if the assign parameter is passed, Smarty assigns the result to a template variable
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*/
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function smarty_function_fetch($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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