<?php /** * EGroupware save redirect script * * idea by: Jason Wies * doing and adding to cvs: Lars Kneschke * * @link http://www.egroupware.org * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License */ use EGroupware\Api; /* Use this script when you want to link to a external url. This way you don't send something like sessionid as referer Use this in your app: "<a href=\"$webserverURL/redirect.php?go=".htmlentities(urlencode('http://www.egroupware.org')).'">' */ if(!function_exists('html_entity_decode')) { function html_entity_decode($given_html, $quote_style = ENT_QUOTES) { $trans_table = array_flip(get_html_translation_table( HTML_SPECIALCHARS, $quote_style)); $trans_table['''] = "'"; return(strtr($given_html, $trans_table)); } } /* Only allow redirects with a valid session */ $GLOBALS['egw_info'] = array( 'flags' => array( 'noheader' => True, 'nonavbar' => True, 'currentapp' => 'home' ) ); include('./header.inc.php'); /* Only allow redirects from inside this eGroupware installation. */ $valid_referer = array(); $path = preg_replace('/\/[^\/]*$/','',$_SERVER['PHP_SELF']) . '/'; array_push($valid_referer, $path); array_push($valid_referer, Api\Header\Http::schema() . '//' . $_SERVER['SERVER_ADDR'] . $path); array_push($valid_referer, Api\Framework::getUrl($path)); $referrer = trim($_SERVER['HTTP_REFERER']); if ((!isset($_SERVER['HTTP_REFERER'])) || (empty($referrer))) { echo "Only usable from within eGroupware.\n"; } else if($_GET['go']) { $allow = false; foreach ($valid_referer as $urlRoot) { /* Check if the referrer begins with a valid URL. */ if (strncmp($urlRoot, $referrer, strlen($urlRoot)) == 0) { $allow = true; break; } } if ($allow) { $url= html_entity_decode(urldecode($_GET['go'])); unset($_GET['go']); /* Only add "&" if there is something to append. */ if (!empty($_GET)) { $url=$url."&".http_build_query($_GET); } Header('Location: ' . html_entity_decode(urldecode($url))); exit; } else { echo "Redirect not allowed for referrer '".$_SERVER['HTTP_REFERER']."'.\n"; echo "<pre>"; print_r($valid_referer); echo "<pre>\n"; } } else { echo "Error redirecting."; }