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204 lines
7.9 KiB
204 lines
7.9 KiB
<?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 https://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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