<?php // Shaarli 0.5.0 - Shaare your links... // The personal, minimalist, super-fast, no-database Delicious clone. By sebsauvage.net // http://sebsauvage.net/wiki/doku.php?id=php:shaarli // Licence: http://www.opensource.org/licenses/zlib-license.php // Requires: PHP 5.3.x // ----------------------------------------------------------------------------------------------- // NEVER TRUST IN PHP.INI // Some hosts do not define a default timezone in php.ini, // so we have to do this for avoid the strict standard error. date_default_timezone_set('UTC'); // ----------------------------------------------------------------------------------------------- // Hardcoded parameter (These parameters can be overwritten by editing the file /data/config.php) // You should not touch any code below (or at your own risks!) $GLOBALS['config']['DATADIR'] = 'data'; // Data subdirectory $GLOBALS['config']['CONFIG_FILE'] = $GLOBALS['config']['DATADIR'].'/config.php'; // Configuration file (user login/password) $GLOBALS['config']['DATASTORE'] = $GLOBALS['config']['DATADIR'].'/datastore.php'; // Data storage file. $GLOBALS['config']['LINKS_PER_PAGE'] = 20; // Default links per page. $GLOBALS['config']['IPBANS_FILENAME'] = $GLOBALS['config']['DATADIR'].'/ipbans.php'; // File storage for failures and bans. $GLOBALS['config']['BAN_AFTER'] = 4; // Ban IP after this many failures. $GLOBALS['config']['BAN_DURATION'] = 1800; // Ban duration for IP address after login failures (in seconds) (1800 sec. = 30 minutes) $GLOBALS['config']['OPEN_SHAARLI'] = false; // If true, anyone can add/edit/delete links without having to login $GLOBALS['config']['HIDE_TIMESTAMPS'] = false; // If true, the moment when links were saved are not shown to users that are not logged in. $GLOBALS['config']['SHOW_ATOM'] = false; // If true, an extra "ATOM feed" button will be displayed in the toolbar $GLOBALS['config']['ENABLE_THUMBNAILS'] = true; // Enable thumbnails in links. $GLOBALS['config']['CACHEDIR'] = 'cache'; // Cache directory for thumbnails for SLOW services (like flickr) $GLOBALS['config']['PAGECACHE'] = 'pagecache'; // Page cache directory. $GLOBALS['config']['ENABLE_LOCALCACHE'] = true; // Enable Shaarli to store thumbnail in a local cache. Disable to reduce web space usage. $GLOBALS['config']['PUBSUBHUB_URL'] = ''; // PubSubHubbub support. Put an empty string to disable, or put your hub url here to enable. $GLOBALS['config']['RAINTPL_TMP'] = 'tmp/' ; // Raintpl cache directory (keep the trailing slash!) $GLOBALS['config']['RAINTPL_TPL'] = 'tpl/' ; // Raintpl template directory (keep the trailing slash!) $GLOBALS['config']['UPDATECHECK_FILENAME'] = $GLOBALS['config']['DATADIR'].'/lastupdatecheck.txt'; // For updates check of Shaarli. $GLOBALS['config']['UPDATECHECK_INTERVAL'] = 86400 ; // Updates check frequency for Shaarli. 86400 seconds=24 hours // Note: You must have publisher.php in the same directory as Shaarli index.php $GLOBALS['config']['ARCHIVE_ORG'] = false; // For each link, add a link to an archived version on archive.org $GLOBALS['config']['ENABLE_RSS_PERMALINKS'] = true; // Enable RSS permalinks by default. This corresponds to the default behavior of shaarli before this was added as an option. $GLOBALS['config']['HIDE_PUBLIC_LINKS'] = false; // ----------------------------------------------------------------------------------------------- define('shaarli_version','0.5.0'); // http://server.com/x/shaarli --> /shaarli/ define('WEB_PATH', substr($_SERVER["REQUEST_URI"], 0, 1+strrpos($_SERVER["REQUEST_URI"], '/', 0))); // Force cookie path (but do not change lifetime) $cookie=session_get_cookie_params(); $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/'; session_set_cookie_params($cookie['lifetime'],$cookiedir,$_SERVER['SERVER_NAME']); // Set default cookie expiration and path. // Set session parameters on server side. define('INACTIVITY_TIMEOUT',3600); // (in seconds). If the user does not access any page within this time, his/her session is considered expired. ini_set('session.use_cookies', 1); // Use cookies to store session. ini_set('session.use_only_cookies', 1); // Force cookies for session (phpsessionID forbidden in URL). ini_set('session.use_trans_sid', false); // Prevent PHP form using sessionID in URL if cookies are disabled. session_name('shaarli'); if (session_id() == '') session_start(); // Start session if needed (Some server auto-start sessions). // PHP Settings ini_set('max_input_time','60'); // High execution time in case of problematic imports/exports. ini_set('memory_limit', '128M'); // Try to set max upload file size and read (May not work on some hosts). ini_set('post_max_size', '16M'); ini_set('upload_max_filesize', '16M'); error_reporting(E_ALL^E_WARNING); // See all error except warnings. //error_reporting(-1); // See all errors (for debugging only) // User configuration if (is_file($GLOBALS['config']['CONFIG_FILE'])) { require_once $GLOBALS['config']['CONFIG_FILE']; } // Shaarli library require_once 'application/LinkDB.php'; require_once 'application/TimeZone.php'; require_once 'application/Utils.php'; require_once 'application/Config.php'; // Ensure the PHP version is supported try { checkPHPVersion('5.3', PHP_VERSION); } catch(Exception $e) { header('Content-Type: text/plain; charset=utf-8'); echo $e->getMessage(); exit; } include "inc/rain.tpl.class.php"; //include Rain TPL raintpl::$tpl_dir = $GLOBALS['config']['RAINTPL_TPL']; // template directory raintpl::$cache_dir = $GLOBALS['config']['RAINTPL_TMP']; // cache directory ob_start(); // Output buffering for the page cache. // In case stupid admin has left magic_quotes enabled in php.ini: if (get_magic_quotes_gpc()) { function stripslashes_deep($value) { $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); return $value; } $_POST = array_map('stripslashes_deep', $_POST); $_GET = array_map('stripslashes_deep', $_GET); $_COOKIE = array_map('stripslashes_deep', $_COOKIE); } // Prevent caching on client side or proxy: (yes, it's ugly) header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); header("Cache-Control: no-store, no-cache, must-revalidate"); header("Cache-Control: post-check=0, pre-check=0", false); header("Pragma: no-cache"); // Directories creations (Note that your web host may require different rights than 705.) if (!is_writable(realpath(dirname(__FILE__)))) die('<pre>ERROR: Shaarli does not have the right to write in its own directory.</pre>'); // Handling of old config file which do not have the new parameters. if (empty($GLOBALS['title'])) $GLOBALS['title']='Shared links on '.escape(indexUrl()); if (empty($GLOBALS['timezone'])) $GLOBALS['timezone']=date_default_timezone_get(); if (empty($GLOBALS['redirector'])) $GLOBALS['redirector']=''; if (empty($GLOBALS['disablesessionprotection'])) $GLOBALS['disablesessionprotection']=false; if (empty($GLOBALS['privateLinkByDefault'])) $GLOBALS['privateLinkByDefault']=false; if (empty($GLOBALS['titleLink'])) $GLOBALS['titleLink']='?'; // I really need to rewrite Shaarli with a proper configuation manager. // Run config screen if first run: if (! is_file($GLOBALS['config']['CONFIG_FILE'])) { install(); } $GLOBALS['title'] = !empty($GLOBALS['title']) ? escape($GLOBALS['title']) : ''; $GLOBALS['titleLink'] = !empty($GLOBALS['titleLink']) ? escape($GLOBALS['titleLink']) : ''; $GLOBALS['redirector'] = !empty($GLOBALS['redirector']) ? escape($GLOBALS['redirector']) : ''; // a token depending of deployment salt, user password, and the current ip define('STAY_SIGNED_IN_TOKEN', sha1($GLOBALS['hash'].$_SERVER["REMOTE_ADDR"].$GLOBALS['salt'])); autoLocale(); // Sniff browser language and set date format accordingly. header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling. //================================================================================================== // Checking session state (i.e. is the user still logged in) //================================================================================================== function setup_login_state() { $userIsLoggedIn = false; // By default, we do not consider the user as logged in; $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met. if ($GLOBALS['config']['OPEN_SHAARLI']) { $userIsLoggedIn = true; } if (!isset($GLOBALS['login'])) { $userIsLoggedIn = false; // Shaarli is not configured yet. $loginFailure = true; } if (isset($_COOKIE['shaarli_staySignedIn']) && $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN && !$loginFailure) { fillSessionInfo(); $userIsLoggedIn = true; } // If session does not exist on server side, or IP address has changed, or session has expired, logout. if (empty($_SESSION['uid']) || ($GLOBALS['disablesessionprotection']==false && $_SESSION['ip']!=allIPs()) || time() >= $_SESSION['expires_on']) { logout(); $userIsLoggedIn = false; $loginFailure = true; } if (!empty($_SESSION['longlastingsession'])) { $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked. } else { $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date. } if (!$loginFailure) { $userIsLoggedIn = true; } return $userIsLoggedIn; } $userIsLoggedIn = setup_login_state(); // Checks if an update is available for Shaarli. // (at most once a day, and only for registered user.) // Output: '' = no new version. // other= the available version. function checkUpdate() { if (!isLoggedIn()) return ''; // Do not check versions for visitors. if (empty($GLOBALS['config']['ENABLE_UPDATECHECK'])) return ''; // Do not check if the user doesn't want to. // Get latest version number at most once a day. if (!is_file($GLOBALS['config']['UPDATECHECK_FILENAME']) || (filemtime($GLOBALS['config']['UPDATECHECK_FILENAME'])<time()-($GLOBALS['config']['UPDATECHECK_INTERVAL']))) { $version=shaarli_version; list($httpstatus,$headers,$data) = getHTTP('https://raw.githubusercontent.com/shaarli/Shaarli/master/shaarli_version.php',2); if (strpos($httpstatus,'200 OK')!==false) $version=str_replace(' */ ?>','',str_replace('<?php /* ','',$data)); // If failed, never mind. We don't want to bother the user with that. file_put_contents($GLOBALS['config']['UPDATECHECK_FILENAME'],$version); // touch file date } // Compare versions: $newestversion=file_get_contents($GLOBALS['config']['UPDATECHECK_FILENAME']); if (version_compare($newestversion,shaarli_version)==1) return $newestversion; return ''; } // ----------------------------------------------------------------------------------------------- // Simple cache system (mainly for the RSS/ATOM feeds). class pageCache { private $url; // Full URL of the page to cache (typically the value returned by pageUrl()) private $shouldBeCached; // boolean: Should this url be cached? private $filename; // Name of the cache file for this url. /* $url = URL (typically the value returned by pageUrl()) $shouldBeCached = boolean. If false, the cache will be disabled. */ public function __construct($url,$shouldBeCached) { $this->url = $url; $this->filename = $GLOBALS['config']['PAGECACHE'].'/'.sha1($url).'.cache'; $this->shouldBeCached = $shouldBeCached; } // If the page should be cached and a cached version exists, // returns the cached version (otherwise, return null). public function cachedVersion() { if (!$this->shouldBeCached) return null; if (is_file($this->filename)) { return file_get_contents($this->filename); exit; } return null; } // Put a page in the cache. public function cache($page) { if (!$this->shouldBeCached) return; file_put_contents($this->filename,$page); } // Purge the whole cache. // (call with pageCache::purgeCache()) public static function purgeCache() { if (is_dir($GLOBALS['config']['PAGECACHE'])) { $handler = opendir($GLOBALS['config']['PAGECACHE']); if ($handler!==false) { while (($filename = readdir($handler))!==false) { if (endsWith($filename,'.cache')) { unlink($GLOBALS['config']['PAGECACHE'].'/'.$filename); } } closedir($handler); } } } } // ----------------------------------------------------------------------------------------------- // Log to text file function logm($message) { $t = strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n"; file_put_contents($GLOBALS['config']['DATADIR'].'/log.txt',$t,FILE_APPEND); } // In a string, converts URLs to clickable links. // Function inspired from http://www.php.net/manual/en/function.preg-replace.php#85722 function text2clickable($url) { $redir = empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector']; return preg_replace('!(((?:https?|ftp|file)://|apt:|magnet:)\S+[[:alnum:]]/?)!si','<a href="'.$redir.'$1" rel="nofollow">$1</a>',$url); } // This function inserts where relevant so that multiple spaces are properly displayed in HTML // even in the absence of <pre> (This is used in description to keep text formatting) function keepMultipleSpaces($text) { return str_replace(' ',' ',$text); } // ------------------------------------------------------------------------------------------ // Sniff browser language to display dates in the right format automatically. // (Note that is may not work on your server if the corresponding local is not installed.) function autoLocale() { $attempts = array('en_US'); // Default if browser does not send HTTP_ACCEPT_LANGUAGE if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // e.g. "fr,fr-fr;q=0.8,en;q=0.5,en-us;q=0.3" { // (It's a bit crude, but it works very well. Preferred language is always presented first.) if (preg_match('/([a-z]{2})-?([a-z]{2})?/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) { $loc = $matches[1] . (!empty($matches[2]) ? '_' . strtoupper($matches[2]) : ''); $attempts = array($loc.'.UTF-8', $loc, str_replace('_', '-', $loc).'.UTF-8', str_replace('_', '-', $loc), $loc . '_' . strtoupper($loc).'.UTF-8', $loc . '_' . strtoupper($loc), $loc . '_' . $loc.'.UTF-8', $loc . '_' . $loc, $loc . '-' . strtoupper($loc).'.UTF-8', $loc . '-' . strtoupper($loc), $loc . '-' . $loc.'.UTF-8', $loc . '-' . $loc); } } setlocale(LC_TIME, $attempts); // LC_TIME = Set local for date/time format only. } // ------------------------------------------------------------------------------------------ // PubSubHubbub protocol support (if enabled) [UNTESTED] // (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ ) if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) include './publisher.php'; function pubsubhub() { if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) { $p = new Publisher($GLOBALS['config']['PUBSUBHUB_URL']); $topic_url = array ( indexUrl().'?do=atom', indexUrl().'?do=rss' ); $p->publish_update($topic_url); } } // ------------------------------------------------------------------------------------------ // Session management // Returns the IP address of the client (Used to prevent session cookie hijacking.) function allIPs() { $ip = $_SERVER["REMOTE_ADDR"]; // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy. if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; } if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; } return $ip; } function fillSessionInfo() { $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid) $_SESSION['ip']=allIPs(); // We store IP address(es) of the client to make sure session is not hijacked. $_SESSION['username']=$GLOBALS['login']; $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Set session expiration. } // Check that user/password is correct. function check_auth($login,$password) { $hash = sha1($password.$login.$GLOBALS['salt']); if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash']) { // Login/password is correct. fillSessionInfo(); logm('Login successful'); return True; } logm('Login failed for user '.$login); return False; } // Returns true if the user is logged in. function isLoggedIn() { global $userIsLoggedIn; return $userIsLoggedIn; } // Force logout. function logout() { if (isset($_SESSION)) { unset($_SESSION['uid']); unset($_SESSION['ip']); unset($_SESSION['username']); unset($_SESSION['privateonly']); } setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH); } // ------------------------------------------------------------------------------------------ // Brute force protection system // Several consecutive failed logins will ban the IP address for 30 minutes. if (!is_file($GLOBALS['config']['IPBANS_FILENAME'])) file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"); include $GLOBALS['config']['IPBANS_FILENAME']; // Signal a failed login. Will ban the IP if too many failures: function ban_loginFailed() { $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS']; if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0; $gb['FAILURES'][$ip]++; if ($gb['FAILURES'][$ip]>($GLOBALS['config']['BAN_AFTER']-1)) { $gb['BANS'][$ip]=time()+$GLOBALS['config']['BAN_DURATION']; logm('IP address banned from login'); } $GLOBALS['IPBANS'] = $gb; file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"); } // Signals a successful login. Resets failed login counter. function ban_loginOk() { $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS']; unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]); $GLOBALS['IPBANS'] = $gb; file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"); } // Checks if the user CAN login. If 'true', the user can try to login. function ban_canLogin() { $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS']; if (isset($gb['BANS'][$ip])) { // User is banned. Check if the ban has expired: if ($gb['BANS'][$ip]<=time()) { // Ban expired, user can try to login again. logm('Ban lifted.'); unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]); file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"); return true; // Ban has expired, user can login. } return false; // User is banned. } return true; // User is not banned. } // ------------------------------------------------------------------------------------------ // Process login form: Check if login/password is correct. if (isset($_POST['login'])) { if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.'); if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password']))) { // Login/password is OK. ban_loginOk(); // If user wants to keep the session cookie even after the browser closes: if (!empty($_POST['longlastingsession'])) { setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, time()+31536000, WEB_PATH); $_SESSION['longlastingsession']=31536000; // (31536000 seconds = 1 year) $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // Set session expiration on server-side. $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/'; session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side // Note: Never forget the trailing slash on the cookie path! session_regenerate_id(true); // Send cookie with new expiration date to browser. } else // Standard session expiration (=when browser closes) { $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/'; session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes" session_regenerate_id(true); } // Optional redirect after login: if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; } if (isset($_POST['returnurl'])) { if (endsWith($_POST['returnurl'],'?do=login')) { header('Location: ?'); exit; } // Prevent loops over login screen. header('Location: '.$_POST['returnurl']); exit; } header('Location: ?'); exit; } else { ban_loginFailed(); $redir = ''; if (isset($_GET['post'])) { $redir = '&post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):''); } echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen. exit; } } // ------------------------------------------------------------------------------------------ // Misc utility functions: // Returns the server URL (including port and http/https), without path. // e.g. "http://myserver.com:8080" // You can append $_SERVER['SCRIPT_NAME'] to get the current script URL. function serverUrl() { $https = (!empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS'])=='on')) || $_SERVER["SERVER_PORT"]=='443'; // HTTPS detection. $serverport = ($_SERVER["SERVER_PORT"]=='80' || ($https && $_SERVER["SERVER_PORT"]=='443') ? '' : ':'.$_SERVER["SERVER_PORT"]); return 'http'.($https?'s':'').'://'.$_SERVER['SERVER_NAME'].$serverport; } // Returns the absolute URL of current script, without the query. // (e.g. http://sebsauvage.net/links/) function indexUrl() { $scriptname = $_SERVER["SCRIPT_NAME"]; // If the script is named 'index.php', we remove it (for better looking URLs, // e.g. http://mysite.com/shaarli/?abcde instead of http://mysite.com/shaarli/index.php?abcde) if (endswith($scriptname,'index.php')) $scriptname = substr($scriptname,0,strlen($scriptname)-9); return serverUrl() . $scriptname; } // Returns the absolute URL of current script, WITH the query. // (e.g. http://sebsauvage.net/links/?toto=titi&spamspamspam=humbug) function pageUrl() { return indexUrl().(!empty($_SERVER["QUERY_STRING"]) ? '?'.$_SERVER["QUERY_STRING"] : ''); } // Convert post_max_size/upload_max_filesize (e.g. '16M') parameters to bytes. function return_bytes($val) { $val = trim($val); $last=strtolower($val[strlen($val)-1]); switch($last) { case 'g': $val *= 1024; case 'm': $val *= 1024; case 'k': $val *= 1024; } return $val; } // Try to determine max file size for uploads (POST). // Returns an integer (in bytes) function getMaxFileSize() { $size1 = return_bytes(ini_get('post_max_size')); $size2 = return_bytes(ini_get('upload_max_filesize')); // Return the smaller of two: $maxsize = min($size1,$size2); // FIXME: Then convert back to readable notations ? (e.g. 2M instead of 2000000) return $maxsize; } /* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch) (used to build the ADD_DATE attribute in Netscape-bookmarks file) PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */ function linkdate2timestamp($linkdate) { if(strcmp($linkdate, '_000000') !== 0 || !$linkdate){ $Y=$M=$D=$h=$m=$s=0; $r = sscanf($linkdate,'%4d%2d%2d_%2d%2d%2d',$Y,$M,$D,$h,$m,$s); return mktime($h,$m,$s,$M,$D,$Y); } return time(); } /* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a RFC822 date. (used to build the pubDate attribute in RSS feed.) */ function linkdate2rfc822($linkdate) { return date('r',linkdate2timestamp($linkdate)); // 'r' is for RFC822 date format. } /* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a ISO 8601 date. (used to build the updated tags in ATOM feed.) */ function linkdate2iso8601($linkdate) { return date('c',linkdate2timestamp($linkdate)); // 'c' is for ISO 8601 date format. } // Parse HTTP response headers and return an associative array. function http_parse_headers_shaarli( $headers ) { $res=array(); foreach($headers as $header) { $i = strpos($header,': '); if ($i!==false) { $key=substr($header,0,$i); $value=substr($header,$i+2,strlen($header)-$i-2); $res[$key]=$value; } } return $res; } /* GET an URL. Input: $url : URL to get (http://...) $timeout : Network timeout (will wait this many seconds for an anwser before giving up). Output: An array. [0] = HTTP status message (e.g. "HTTP/1.1 200 OK") or error message [1] = associative array containing HTTP response headers (e.g. echo getHTTP($url)[1]['Content-Type']) [2] = data Example: list($httpstatus,$headers,$data) = getHTTP('http://sebauvage.net/'); if (strpos($httpstatus,'200 OK')!==false) echo 'Data type: '.htmlspecialchars($headers['Content-Type']); else echo 'There was an error: '.htmlspecialchars($httpstatus) */ function getHTTP($url,$timeout=30) { try { $options = array('http'=>array('method'=>'GET','timeout' => $timeout, 'user_agent' => 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0')); // Force network timeout $context = stream_context_create($options); $data=file_get_contents($url,false,$context,-1, 4000000); // We download at most 4 Mb from source. if (!$data) { return array('HTTP Error',array(),''); } $httpStatus=$http_response_header[0]; // e.g. "HTTP/1.1 200 OK" $responseHeaders=http_parse_headers_shaarli($http_response_header); return array($httpStatus,$responseHeaders,$data); } catch (Exception $e) // getHTTP *can* fail silently (we don't care if the title cannot be fetched) { return array($e->getMessage(),'',''); } } // Extract title from an HTML document. // (Returns an empty string if not found.) function html_extract_title($html) { return preg_match('!<title>(.*?)</title>!is', $html, $matches) ? trim(str_replace("\n",' ', $matches[1])) : '' ; } // ------------------------------------------------------------------------------------------ // Token management for XSRF protection // Token should be used in any form which acts on data (create,update,delete,import...). if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array(); // Token are attached to the session. // Returns a token. function getToken() { $rnd = sha1(uniqid('',true).'_'.mt_rand().$GLOBALS['salt']); // We generate a random string. $_SESSION['tokens'][$rnd]=1; // Store it on the server side. return $rnd; } // Tells if a token is OK. Using this function will destroy the token. // true=token is OK. function tokenOk($token) { if (isset($_SESSION['tokens'][$token])) { unset($_SESSION['tokens'][$token]); // Token is used: destroy it. return true; // Token is OK. } return false; // Wrong token, or already used. } // ------------------------------------------------------------------------------------------ /* This class is in charge of building the final page. (This is basically a wrapper around RainTPL which pre-fills some fields.) p = new pageBuilder; p.assign('myfield','myvalue'); p.renderPage('mytemplate'); */ class pageBuilder { private $tpl; // RainTPL template function __construct() { $this->tpl=false; } private function initialize() { $this->tpl = new RainTPL; $this->tpl->assign('newversion',escape(checkUpdate())); $this->tpl->assign('feedurl',escape(indexUrl())); $searchcrits=''; // Search criteria if (!empty($_GET['searchtags'])) $searchcrits.='&searchtags='.urlencode($_GET['searchtags']); elseif (!empty($_GET['searchterm'])) $searchcrits.='&searchterm='.urlencode($_GET['searchterm']); $this->tpl->assign('searchcrits',$searchcrits); $this->tpl->assign('source',indexUrl()); $this->tpl->assign('version',shaarli_version); $this->tpl->assign('scripturl',indexUrl()); $this->tpl->assign('pagetitle','Shaarli'); $this->tpl->assign('privateonly',!empty($_SESSION['privateonly'])); // Show only private links? if (!empty($GLOBALS['title'])) $this->tpl->assign('pagetitle',$GLOBALS['title']); if (!empty($GLOBALS['titleLink'])) $this->tpl->assign('titleLink',$GLOBALS['titleLink']); if (!empty($GLOBALS['pagetitle'])) $this->tpl->assign('pagetitle',$GLOBALS['pagetitle']); $this->tpl->assign('shaarlititle',empty($GLOBALS['title']) ? 'Shaarli': $GLOBALS['title'] ); return; } // The following assign() method is basically the same as RainTPL (except that it's lazy) public function assign($what,$where) { if ($this->tpl===false) $this->initialize(); // Lazy initialization $this->tpl->assign($what,$where); } // Render a specific page (using a template). // e.g. pb.renderPage('picwall') public function renderPage($page) { if ($this->tpl===false) $this->initialize(); // Lazy initialization $this->tpl->draw($page); } } // ------------------------------------------------------------------------------------------ // Output the last N links in RSS 2.0 format. function showRSS() { header('Content-Type: application/rss+xml; charset=utf-8'); // $usepermalink : If true, use permalink instead of final link. // User just has to add 'permalink' in URL parameters. e.g. http://mysite.com/shaarli/?do=rss&permalinks // Also enabled through a config option $usepermalinks = isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS']; // Cache system $query = $_SERVER["QUERY_STRING"]; $cache = new pageCache(pageUrl(),startsWith($query,'do=rss') && !isLoggedIn()); $cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; } // If cached was not found (or not usable), then read the database and build the response: $LINKSDB = new LinkDB( $GLOBALS['config']['DATASTORE'], isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'], $GLOBALS['config']['HIDE_PUBLIC_LINKS'] ); // Read links from database (and filter private links if user it not logged in). // Optionally filter the results: $linksToDisplay=array(); if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']); else if (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags'])); else $linksToDisplay = $LINKSDB; $nblinksToDisplay = 50; // Number of links to display. if (!empty($_GET['nb'])) // In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links. { $nblinksToDisplay = $_GET['nb']=='all' ? count($linksToDisplay) : max($_GET['nb']+0,1) ; } $pageaddr=escape(indexUrl()); echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">'; echo '<channel><title>'.$GLOBALS['title'].'</title><link>'.$pageaddr.'</link>'; echo '<description>Shared links</description><language>en-en</language><copyright>'.$pageaddr.'</copyright>'."\n\n"; if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) { echo '<!-- PubSubHubbub Discovery -->'; echo '<link rel="hub" href="'.escape($GLOBALS['config']['PUBSUBHUB_URL']).'" xmlns="http://www.w3.org/2005/Atom" />'; echo '<link rel="self" href="'.$pageaddr.'?do=rss" xmlns="http://www.w3.org/2005/Atom" />'; echo '<!-- End Of PubSubHubbub Discovery -->'; } $i=0; $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys(). while ($i<$nblinksToDisplay && $i<count($keys)) { $link = $linksToDisplay[$keys[$i]]; $guid = $pageaddr.'?'.smallHash($link['linkdate']); $rfc822date = linkdate2rfc822($link['linkdate']); $absurl = $link['url']; if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute if ($usepermalinks===true) echo '<item><title>'.$link['title'].'</title><guid isPermaLink="true">'.$guid.'</guid><link>'.$guid.'</link>'; else echo '<item><title>'.$link['title'].'</title><guid isPermaLink="false">'.$guid.'</guid><link>'.$absurl.'</link>'; if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) echo '<pubDate>'.escape($rfc822date)."</pubDate>\n"; if ($link['tags']!='') // Adding tags to each RSS entry (as mentioned in RSS specification) { foreach(explode(' ',$link['tags']) as $tag) { echo '<category domain="'.$pageaddr.'">'.$tag.'</category>'."\n"; } } // Add permalink in description $descriptionlink = '(<a href="'.$guid.'">Permalink</a>)'; // If user wants permalinks first, put the final link in description if ($usepermalinks===true) $descriptionlink = '(<a href="'.$absurl.'">Link</a>)'; if (strlen($link['description'])>0) $descriptionlink = '<br>'.$descriptionlink; echo '<description><![CDATA['.nl2br(keepMultipleSpaces(text2clickable($link['description']))).$descriptionlink.']]></description>'."\n</item>\n"; $i++; } echo '</channel></rss><!-- Cached version of '.escape(pageUrl()).' -->'; $cache->cache(ob_get_contents()); ob_end_flush(); exit; } // ------------------------------------------------------------------------------------------ // Output the last N links in ATOM format. function showATOM() { header('Content-Type: application/atom+xml; charset=utf-8'); // $usepermalink : If true, use permalink instead of final link. // User just has to add 'permalink' in URL parameters. e.g. http://mysite.com/shaarli/?do=atom&permalinks $usepermalinks = isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS']; // Cache system $query = $_SERVER["QUERY_STRING"]; $cache = new pageCache(pageUrl(),startsWith($query,'do=atom') && !isLoggedIn()); $cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; } // If cached was not found (or not usable), then read the database and build the response: // Read links from database (and filter private links if used it not logged in). $LINKSDB = new LinkDB( $GLOBALS['config']['DATASTORE'], isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'], $GLOBALS['config']['HIDE_PUBLIC_LINKS'] ); // Optionally filter the results: $linksToDisplay=array(); if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']); else if (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags'])); else $linksToDisplay = $LINKSDB; $nblinksToDisplay = 50; // Number of links to display. if (!empty($_GET['nb'])) // In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links. { $nblinksToDisplay = $_GET['nb']=='all' ? count($linksToDisplay) : max($_GET['nb']+0,1) ; } $pageaddr=escape(indexUrl()); $latestDate = ''; $entries=''; $i=0; $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys(). while ($i<$nblinksToDisplay && $i<count($keys)) { $link = $linksToDisplay[$keys[$i]]; $guid = $pageaddr.'?'.smallHash($link['linkdate']); $iso8601date = linkdate2iso8601($link['linkdate']); $latestDate = max($latestDate,$iso8601date); $absurl = $link['url']; if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute $entries.='<entry><title>'.$link['title'].'</title>'; if ($usepermalinks===true) $entries.='<link href="'.$guid.'" /><id>'.$guid.'</id>'; else $entries.='<link href="'.$absurl.'" /><id>'.$guid.'</id>'; if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $entries.='<updated>'.escape($iso8601date).'</updated>'; // Add permalink in description $descriptionlink = '(<a href="'.$guid.'">Permalink</a>)'; // If user wants permalinks first, put the final link in description if ($usepermalinks===true) $descriptionlink = '(<a href="'.$absurl.'">Link</a>)'; if (strlen($link['description'])>0) $descriptionlink = '<br>'.$descriptionlink; $entries.='<content type="html"><![CDATA['.nl2br(keepMultipleSpaces(text2clickable($link['description']))).$descriptionlink."]]></content>\n"; if ($link['tags']!='') // Adding tags to each ATOM entry (as mentioned in ATOM specification) { foreach(explode(' ',$link['tags']) as $tag) { $entries.='<category scheme="'.$pageaddr.'" term="'.$tag.'" />'."\n"; } } $entries.="</entry>\n"; $i++; } $feed='<?xml version="1.0" encoding="UTF-8"?><feed xmlns="http://www.w3.org/2005/Atom">'; $feed.='<title>'.$GLOBALS['title'].'</title>'; if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $feed.='<updated>'.escape($latestDate).'</updated>'; $feed.='<link rel="self" href="'.escape(serverUrl().$_SERVER["REQUEST_URI"]).'" />'; if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) { $feed.='<!-- PubSubHubbub Discovery -->'; $feed.='<link rel="hub" href="'.escape($GLOBALS['config']['PUBSUBHUB_URL']).'" />'; $feed.='<!-- End Of PubSubHubbub Discovery -->'; } $feed.='<author><name>'.$pageaddr.'</name><uri>'.$pageaddr.'</uri></author>'; $feed.='<id>'.$pageaddr.'</id>'."\n\n"; // Yes, I know I should use a real IRI (RFC3987), but the site URL will do. $feed.=$entries; $feed.='</feed><!-- Cached version of '.escape(pageUrl()).' -->'; echo $feed; $cache->cache(ob_get_contents()); ob_end_flush(); exit; } // ------------------------------------------------------------------------------------------ // Daily RSS feed: 1 RSS entry per day giving all the links on that day. // Gives the last 7 days (which have links). // This RSS feed cannot be filtered. function showDailyRSS() { // Cache system $query = $_SERVER["QUERY_STRING"]; $cache = new pageCache(pageUrl(), startsWith($query, 'do=dailyrss') && !isLoggedIn()); $cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; } // If cached was not found (or not usable), then read the database and build the response: // Read links from database (and filter private links if used it not logged in). $LINKSDB = new LinkDB( $GLOBALS['config']['DATASTORE'], isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'], $GLOBALS['config']['HIDE_PUBLIC_LINKS'] ); /* Some Shaarlies may have very few links, so we need to look back in time (rsort()) until we have enough days ($nb_of_days). */ $linkdates = array(); foreach ($LINKSDB as $linkdate => $value) { $linkdates[] = $linkdate; } rsort($linkdates); $nb_of_days = 7; // We take 7 days. $today = Date('Ymd'); $days = array(); foreach ($linkdates as $linkdate) { $day = substr($linkdate, 0, 8); // Extract day (without time) if (strcmp($day,$today) < 0) { if (empty($days[$day])) { $days[$day] = array(); } $days[$day][] = $linkdate; } if (count($days) > $nb_of_days) { break; // Have we collected enough days? } } // Build the RSS feed. header('Content-Type: application/rss+xml; charset=utf-8'); $pageaddr = escape(indexUrl()); echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">'; echo '<channel>'; echo '<title>Daily - '. $GLOBALS['title'] . '</title>'; echo '<link>'. $pageaddr .'</link>'; echo '<description>Daily shared links</description>'; echo '<language>en-en</language>'; echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL; // For each day. foreach ($days as $day => $linkdates) { $daydate = linkdate2timestamp($day.'_000000'); // Full text date $rfc822date = linkdate2rfc822($day.'_000000'); $absurl = escape(indexUrl().'?do=daily&day='.$day); // Absolute URL of the corresponding "Daily" page. // Build the HTML body of this RSS entry. $html = ''; $href = ''; $links = array(); // We pre-format some fields for proper output. foreach ($linkdates as $linkdate) { $l = $LINKSDB[$linkdate]; $l['formatedDescription'] = nl2br(keepMultipleSpaces(text2clickable($l['description']))); $l['thumbnail'] = thumbnail($l['url']); $l['timestamp'] = linkdate2timestamp($l['linkdate']); if (startsWith($l['url'], '?')) { $l['url'] = indexUrl() . $l['url']; // make permalink URL absolute } $links[$linkdate] = $l; } // Then build the HTML for this day: $tpl = new RainTPL; $tpl->assign('title', $GLOBALS['title']); $tpl->assign('daydate', $daydate); $tpl->assign('absurl', $absurl); $tpl->assign('links', $links); $tpl->assign('rfc822date', escape($rfc822date)); $html = $tpl->draw('dailyrss', $return_string=true); echo $html . PHP_EOL; } echo '</channel></rss><!-- Cached version of '. escape(pageUrl()) .' -->'; $cache->cache(ob_get_contents()); ob_end_flush(); exit; } // "Daily" page. function showDaily() { $LINKSDB = new LinkDB( $GLOBALS['config']['DATASTORE'], isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'], $GLOBALS['config']['HIDE_PUBLIC_LINKS'] ); $day=Date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD. if (isset($_GET['day'])) $day=$_GET['day']; $days = $LINKSDB->days(); $i = array_search($day,$days); if ($i===false) { $i=count($days)-1; $day=$days[$i]; } $previousday=''; $nextday=''; if ($i!==false) { if ($i>=1) $previousday=$days[$i-1]; if ($i<count($days)-1) $nextday=$days[$i+1]; } try { $linksToDisplay = $LINKSDB->filterDay($day); } catch (Exception $exc) { error_log($exc); $linksToDisplay = array(); } // We pre-format some fields for proper output. foreach($linksToDisplay as $key=>$link) { $taglist = explode(' ',$link['tags']); uasort($taglist, 'strcasecmp'); $linksToDisplay[$key]['taglist']=$taglist; $linksToDisplay[$key]['formatedDescription']=nl2br(keepMultipleSpaces(text2clickable($link['description']))); $linksToDisplay[$key]['thumbnail'] = thumbnail($link['url']); $linksToDisplay[$key]['timestamp'] = linkdate2timestamp($link['linkdate']); } /* We need to spread the articles on 3 columns. I did not want to use a JavaScript lib like http://masonry.desandro.com/ so I manually spread entries with a simple method: I roughly evaluate the height of a div according to title and description length. */ $columns=array(array(),array(),array()); // Entries to display, for each column. $fill=array(0,0,0); // Rough estimate of columns fill. foreach($linksToDisplay as $key=>$link) { // Roughly estimate length of entry (by counting characters) // Title: 30 chars = 1 line. 1 line is 30 pixels height. // Description: 836 characters gives roughly 342 pixel height. // This is not perfect, but it's usually OK. $length=strlen($link['title'])+(342*strlen($link['description']))/836; if ($link['thumbnail']) $length +=100; // 1 thumbnails roughly takes 100 pixels height. // Then put in column which is the less filled: $smallest=min($fill); // find smallest value in array. $index=array_search($smallest,$fill); // find index of this smallest value. array_push($columns[$index],$link); // Put entry in this column. $fill[$index]+=$length; } $PAGE = new pageBuilder; $PAGE->assign('linksToDisplay',$linksToDisplay); $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('cols', $columns); $PAGE->assign('day',linkdate2timestamp($day.'_000000')); $PAGE->assign('previousday',$previousday); $PAGE->assign('nextday',$nextday); $PAGE->renderPage('daily'); exit; } // ------------------------------------------------------------------------------------------ // Render HTML page (according to URL parameters and user rights) function renderPage() { $LINKSDB = new LinkDB( $GLOBALS['config']['DATASTORE'], isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'], $GLOBALS['config']['HIDE_PUBLIC_LINKS'] ); // -------- Display login form. if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=login')) { if ($GLOBALS['config']['OPEN_SHAARLI']) { header('Location: ?'); exit; } // No need to login for open Shaarli $token=''; if (ban_canLogin()) $token=getToken(); // Do not waste token generation if not useful. $PAGE = new pageBuilder; $PAGE->assign('token',$token); $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):'')); $PAGE->renderPage('loginform'); exit; } // -------- User wants to logout. if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=logout')) { invalidateCaches(); logout(); header('Location: ?'); exit; } // -------- Picture wall if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=picwall')) { // Optionally filter the results: $links=array(); if (!empty($_GET['searchterm'])) $links = $LINKSDB->filterFulltext($_GET['searchterm']); elseif (!empty($_GET['searchtags'])) $links = $LINKSDB->filterTags(trim($_GET['searchtags'])); else $links = $LINKSDB; $body=''; $linksToDisplay=array(); // Get only links which have a thumbnail. foreach($links as $link) { $permalink='?'.escape(smallhash($link['linkdate'])); $thumb=lazyThumbnail($link['url'],$permalink); if ($thumb!='') // Only output links which have a thumbnail. { $link['thumbnail']=$thumb; // Thumbnail HTML code. $linksToDisplay[]=$link; // Add to array. } } $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('linksToDisplay',$linksToDisplay); $PAGE->renderPage('picwall'); exit; } // -------- Tag cloud if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=tagcloud')) { $tags= $LINKSDB->allTags(); // We sort tags alphabetically, then choose a font size according to count. // First, find max value. $maxcount=0; foreach($tags as $key=>$value) $maxcount=max($maxcount,$value); ksort($tags); $tagList=array(); foreach($tags as $key=>$value) // Tag font size scaling: default 15 and 30 logarithm bases affect scaling, 22 and 6 are arbitrary font sizes for max and min sizes. { $tagList[$key] = array('count'=>$value,'size'=>log($value, 15) / log($maxcount, 30) * (22-6) + 6); } $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('tags',$tagList); $PAGE->renderPage('tagcloud'); exit; } // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...) if (isset($_GET['addtag'])) { // Get previous URL (http_referer) and add the tag to the searchtags parameters in query. if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params); // Prevent redirection loop if (isset($params['addtag'])) { unset($params['addtag']); } // Check if this tag is already in the search query and ignore it if it is. // Each tag is always separated by a space if (isset($params['searchtags'])) { $current_tags = explode(' ', $params['searchtags']); } else { $current_tags = array(); } $addtag = true; foreach ($current_tags as $value) { if ($value === $_GET['addtag']) { $addtag = false; break; } } // Append the tag if necessary if (empty($params['searchtags'])) { $params['searchtags'] = trim($_GET['addtag']); } else if ($addtag) { $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']); } unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different) header('Location: ?'.http_build_query($params)); exit; } // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...) if (isset($_GET['removetag'])) { // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query. if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?'); exit; } // In case browser does not send HTTP_REFERER parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params); // Prevent redirection loop if (isset($params['removetag'])) { unset($params['removetag']); } if (isset($params['searchtags'])) { $tags = explode(' ',$params['searchtags']); $tags=array_diff($tags, array($_GET['removetag'])); // Remove value from array $tags. if (count($tags)==0) { unset($params['searchtags']); } else { $params['searchtags'] = implode(' ',$tags); } unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different) } header('Location: ?'.http_build_query($params)); exit; } // -------- User wants to change the number of links per page (linksperpage=...) if (isset($_GET['linksperpage'])) { if (is_numeric($_GET['linksperpage'])) { $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage'])); } header('Location: '. generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'))); exit; } // -------- User wants to see only private links (toggle) if (isset($_GET['privateonly'])) { if (empty($_SESSION['privateonly'])) { $_SESSION['privateonly'] = 1; // See only private links } else { unset($_SESSION['privateonly']); // See all links } header('Location: '. generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly'))); exit; } // -------- Handle other actions allowed for non-logged in users: if (!isLoggedIn()) { // User tries to post new link but is not logged in: // Show login screen, then redirect to ?post=... if (isset($_GET['post'])) { header('Location: ?do=login&post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link. exit; } // Same case as above except that user tried to access ?do=addlink without being logged in // Note: passing empty parameters makes Shaarli generate default URLs and descriptions. if (isset($_GET['do']) && $_GET['do'] === 'addlink') { header('Location: ?do=login&post='); exit; } $PAGE = new pageBuilder; buildLinkList($PAGE,$LINKSDB); // Compute list of links to display $PAGE->renderPage('linklist'); exit; // Never remove this one! All operations below are reserved for logged in user. } // -------- All other functions are reserved for the registered user: // -------- Display the Tools menu if requested (import/export/bookmarklet...) if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=tools')) { $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('pageabsaddr',indexUrl()); $PAGE->renderPage('tools'); exit; } // -------- User wants to change his/her password. if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=changepasswd')) { if ($GLOBALS['config']['OPEN_SHAARLI']) die('You are not supposed to change a password on an Open Shaarli.'); if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword'])) { if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away! // Make sure old password is correct. $oldhash = sha1($_POST['oldpassword'].$GLOBALS['login'].$GLOBALS['salt']); if ($oldhash!=$GLOBALS['hash']) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; } // Save new password $GLOBALS['salt'] = sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless. $GLOBALS['hash'] = sha1($_POST['setpassword'].$GLOBALS['login'].$GLOBALS['salt']); try { writeConfig($GLOBALS, isLoggedIn()); } catch(Exception $e) { error_log( 'ERROR while writing config file after changing password.' . PHP_EOL . $e->getMessage() ); // TODO: do not handle exceptions/errors in JS. echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>'; exit; } echo '<script>alert("Your password has been changed.");document.location=\'?do=tools\';</script>'; exit; } else // show the change password form. { $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('token',getToken()); $PAGE->renderPage('changepassword'); exit; } } // -------- User wants to change configuration if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=configure')) { if (!empty($_POST['title']) ) { if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away! $tz = 'UTC'; if (!empty($_POST['continent']) && !empty($_POST['city'])) if (isTimeZoneValid($_POST['continent'],$_POST['city'])) $tz = $_POST['continent'].'/'.$_POST['city']; $GLOBALS['timezone'] = $tz; $GLOBALS['title']=$_POST['title']; $GLOBALS['titleLink']=$_POST['titleLink']; $GLOBALS['redirector']=$_POST['redirector']; $GLOBALS['disablesessionprotection']=!empty($_POST['disablesessionprotection']); $GLOBALS['privateLinkByDefault']=!empty($_POST['privateLinkByDefault']); $GLOBALS['config']['ENABLE_RSS_PERMALINKS']= !empty($_POST['enableRssPermalinks']); $GLOBALS['config']['ENABLE_UPDATECHECK'] = !empty($_POST['updateCheck']); $GLOBALS['config']['HIDE_PUBLIC_LINKS'] = !empty($_POST['hidePublicLinks']); try { writeConfig($GLOBALS, isLoggedIn()); } catch(Exception $e) { error_log( 'ERROR while writing config file after configuration update.' . PHP_EOL . $e->getMessage() ); // TODO: do not handle exceptions/errors in JS. echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>'; exit; } echo '<script>alert("Configuration was saved.");document.location=\'?do=tools\';</script>'; exit; } else // Show the configuration form. { $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('token',getToken()); $PAGE->assign('title', empty($GLOBALS['title']) ? '' : $GLOBALS['title'] ); $PAGE->assign('redirector', empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'] ); list($timezone_form, $timezone_js) = generateTimeZoneForm($GLOBALS['timezone']); $PAGE->assign('timezone_form', $timezone_form); $PAGE->assign('timezone_js',$timezone_js); $PAGE->renderPage('configure'); exit; } } // -------- User wants to rename a tag or delete it if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=changetag')) { if (empty($_POST['fromtag'])) { $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('token',getToken()); $PAGE->assign('tags', $LINKSDB->allTags()); $PAGE->renderPage('changetag'); exit; } if (!tokenOk($_POST['token'])) die('Wrong token.'); // Delete a tag: if (!empty($_POST['deletetag']) && !empty($_POST['fromtag'])) { $needle=trim($_POST['fromtag']); $linksToAlter = $LINKSDB->filterTags($needle,true); // True for case-sensitive tag search. foreach($linksToAlter as $key=>$value) { $tags = explode(' ',trim($value['tags'])); unset($tags[array_search($needle,$tags)]); // Remove tag. $value['tags']=trim(implode(' ',$tags)); $LINKSDB[$key]=$value; } $LINKSDB->savedb(); // Save to disk. echo '<script>alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?\';</script>'; exit; } // Rename a tag: if (!empty($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag'])) { $needle=trim($_POST['fromtag']); $linksToAlter = $LINKSDB->filterTags($needle,true); // true for case-sensitive tag search. foreach($linksToAlter as $key=>$value) { $tags = explode(' ',trim($value['tags'])); $tags[array_search($needle,$tags)] = trim($_POST['totag']); // Replace tags value. $value['tags']=trim(implode(' ',$tags)); $LINKSDB[$key]=$value; } $LINKSDB->savedb(); // Save to disk. echo '<script>alert("Tag was renamed in '.count($linksToAlter).' links.");document.location=\'?searchtags='.urlencode($_POST['totag']).'\';</script>'; exit; } } // -------- User wants to add a link without using the bookmarklet: Show form. if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=addlink')) { $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->renderPage('addlink'); exit; } // -------- User clicked the "Save" button when editing a link: Save link to database. if (isset($_POST['save_edit'])) { if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away! $tags = trim(preg_replace('/\s\s+/',' ', $_POST['lf_tags'])); // Remove multiple spaces. $tags = implode(' ', array_unique(explode(' ', $tags))); // Remove duplicates. $linkdate=$_POST['lf_linkdate']; $url = trim($_POST['lf_url']); if (!startsWith($url,'http:') && !startsWith($url,'https:') && !startsWith($url,'ftp:') && !startsWith($url,'magnet:') && !startsWith($url,'?') && !startsWith($url,'javascript:')) $url = 'http://'.$url; $link = array('title'=>trim($_POST['lf_title']),'url'=>$url,'description'=>trim($_POST['lf_description']),'private'=>(isset($_POST['lf_private']) ? 1 : 0), 'linkdate'=>$linkdate,'tags'=>str_replace(',',' ',$tags)); if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title. $LINKSDB[$linkdate] = $link; $LINKSDB->savedb(); // Save to disk. pubsubhub(); // If we are called from the bookmarklet, we must close the popup: if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; } $returnurl = ( !empty($_POST['returnurl']) ? escape($_POST['returnurl']) : '?' ); $returnurl .= '#'.smallHash($_POST['lf_linkdate']); // Scroll to the link which has been edited. $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link')); header('Location: '. $location); // After saving the link, redirect to the page the user was on. exit; } // -------- User clicked the "Cancel" button when editing a link. if (isset($_POST['cancel_edit'])) { // If we are called from the bookmarklet, we must close the popup: if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; } $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' ); $returnurl .= '#'.smallHash($_POST['lf_linkdate']); // Scroll to the link which has been edited. $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link')); header('Location: '.$returnurl); // After canceling, redirect to the page the user was on. exit; } // -------- User clicked the "Delete" button when editing a link: Delete link from database. if (isset($_POST['delete_link'])) { if (!tokenOk($_POST['token'])) die('Wrong token.'); // We do not need to ask for confirmation: // - confirmation is handled by JavaScript // - we are protected from XSRF by the token. $linkdate=$_POST['lf_linkdate']; unset($LINKSDB[$linkdate]); $LINKSDB->savedb(); // save to disk // If we are called from the bookmarklet, we must close the popup: if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; } // Pick where we're going to redirect // ============================================================= // Basically, we can't redirect to where we were previously if it was a permalink // or an edit_link, because it would 404. // Cases: // - / : nothing in $_GET, redirect to self // - /?page : redirect to self // - /?searchterm : redirect to self (there might be other links) // - /?searchtags : redirect to self // - /permalink : redirect to / (the link does not exist anymore) // - /?edit_link : redirect to / (the link does not exist anymore) // PHP treats the permalink as a $_GET variable, so we need to check if every condition for self // redirect is not satisfied, and only then redirect to / $location = "?"; // Self redirection if (count($_GET) == 0 || isset($_GET['page']) || isset($_GET['searchterm']) || isset($_GET['searchtags']) ) { if (isset($_POST['returnurl'])) { $location = $_POST['returnurl']; // Handle redirects given by the form } else { $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('delete_link')); } } header('Location: ' . $location); // After deleting the link, redirect to appropriate location exit; } // -------- User clicked the "EDIT" button on a link: Display link edit form. if (isset($_GET['edit_link'])) { $link = $LINKSDB[$_GET['edit_link']]; // Read database if (!$link) { header('Location: ?'); exit; } // Link not found in database. $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('link',$link); $PAGE->assign('link_is_new',false); $PAGE->assign('token',getToken()); // XSRF protection. $PAGE->assign('http_referer',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : '')); $PAGE->assign('tags', $LINKSDB->allTags()); $PAGE->renderPage('editlink'); exit; } // -------- User want to post a new link: Display link edit form. if (isset($_GET['post'])) { $url=$_GET['post']; // We remove the annoying parameters added by FeedBurner, GoogleFeedProxy, Facebook... $annoyingpatterns = array('/[\?&]utm_source=[^&]*/', '/[\?&]utm_campaign=[^&]*/', '/[\?&]utm_medium=[^&]*/', '/#xtor=RSS-[^&]*/', '/[\?&]fb_[^&]*/', '/[\?&]__scoop[^&]*/', '/#tk\.rss_all\?/', '/[\?&]action_ref_map=[^&]*/', '/[\?&]action_type_map=[^&]*/', '/[\?&]action_object_map=[^&]*/', '/[\?&]utm_content=[^&]*/', '/[\?&]fb=[^&]*/', '/[\?&]xtor=[^&]*/' ); foreach($annoyingpatterns as $pattern) { $url = preg_replace($pattern, "", $url); } $link_is_new = false; $link = $LINKSDB->getLinkFromUrl($url); // Check if URL is not already in database (in this case, we will edit the existing link) if (!$link) { $link_is_new = true; // This is a new link $linkdate = strval(date('Ymd_His')); $title = (empty($_GET['title']) ? '' : $_GET['title'] ); // Get title if it was provided in URL (by the bookmarklet). $description = (empty($_GET['description']) ? '' : $_GET['description']); // Get description if it was provided in URL (by the bookmarklet). [Bronco added that] $tags = (empty($_GET['tags']) ? '' : $_GET['tags'] ); // Get tags if it was provided in URL $private = (!empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0); // Get private if it was provided in URL if (($url!='') && parse_url($url,PHP_URL_SCHEME)=='') $url = 'http://'.$url; // If this is an HTTP link, we try go get the page to extract the title (otherwise we will to straight to the edit form.) if (empty($title) && parse_url($url,PHP_URL_SCHEME)=='http') { list($status,$headers,$data) = getHTTP($url,4); // Short timeout to keep the application responsive. // FIXME: Decode charset according to specified in either 1) HTTP response headers or 2) <head> in html if (strpos($status,'200 OK')!==false) { // Look for charset in html header. preg_match('#<meta .*charset=.*>#Usi', $data, $meta); // If found, extract encoding. if (!empty($meta[0])) { // Get encoding specified in header. preg_match('#charset="?(.*)"#si', $meta[0], $enc); // If charset not found, use utf-8. $html_charset = (!empty($enc[1])) ? strtolower($enc[1]) : 'utf-8'; } else { $html_charset = 'utf-8'; } // Extract title $title = html_extract_title($data); if (!empty($title)) { // Re-encode title in utf-8 if necessary. $title = ($html_charset == 'iso-8859-1') ? utf8_encode($title) : $title; } } } if ($url=='') // In case of empty URL, this is just a text (with a link that points to itself) { $url='?'.smallHash($linkdate); $title='Note: '; } $link = array('linkdate'=>$linkdate,'title'=>$title,'url'=>$url,'description'=>$description,'tags'=>$tags,'private'=>$private); } $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('link',$link); $PAGE->assign('link_is_new',$link_is_new); $PAGE->assign('token',getToken()); // XSRF protection. $PAGE->assign('http_referer',(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '')); $PAGE->assign('source',(isset($_GET['source']) ? $_GET['source'] : '')); $PAGE->assign('tags', $LINKSDB->allTags()); $PAGE->renderPage('editlink'); exit; } // -------- Export as Netscape Bookmarks HTML file. if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=export')) { if (empty($_GET['what'])) { $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->renderPage('export'); exit; } $exportWhat=$_GET['what']; if (!array_intersect(array('all','public','private'),array($exportWhat))) die('What are you trying to export???'); header('Content-Type: text/html; charset=utf-8'); header('Content-disposition: attachment; filename=bookmarks_'.$exportWhat.'_'.strval(date('Ymd_His')).'.html'); $currentdate=date('Y/m/d H:i:s'); echo <<<HTML <!DOCTYPE NETSCAPE-Bookmark-file-1> <!-- This is an automatically generated file. It will be read and overwritten. DO NOT EDIT! --> <!-- Shaarli {$exportWhat} bookmarks export on {$currentdate} --> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8"> <TITLE>Bookmarks</TITLE> <H1>Bookmarks</H1> HTML; foreach($LINKSDB as $link) { if ($exportWhat=='all' || ($exportWhat=='private' && $link['private']!=0) || ($exportWhat=='public' && $link['private']==0)) { echo '<DT><A HREF="'.$link['url'].'" ADD_DATE="'.linkdate2timestamp($link['linkdate']).'" PRIVATE="'.$link['private'].'"'; if ($link['tags']!='') echo ' TAGS="'.str_replace(' ',',',$link['tags']).'"'; echo '>'.$link['title']."</A>\n"; if ($link['description']!='') echo '<DD>'.$link['description']."\n"; } } exit; } // -------- User is uploading a file for import if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=upload')) { // If file is too big, some form field may be missing. if (!isset($_POST['token']) || (!isset($_FILES)) || (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size']==0)) { $returnurl = ( empty($_SERVER['HTTP_REFERER']) ? '?' : $_SERVER['HTTP_REFERER'] ); echo '<script>alert("The file you are trying to upload is probably bigger than what this webserver can accept ('.getMaxFileSize().' bytes). Please upload in smaller chunks.");document.location=\''.escape($returnurl).'\';</script>'; exit; } if (!tokenOk($_POST['token'])) die('Wrong token.'); importFile(); exit; } // -------- Show upload/import dialog: if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=import')) { $PAGE = new pageBuilder; $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('token',getToken()); $PAGE->assign('maxfilesize',getMaxFileSize()); $PAGE->renderPage('import'); exit; } // -------- Otherwise, simply display search form and links: $PAGE = new pageBuilder; buildLinkList($PAGE,$LINKSDB); // Compute list of links to display $PAGE->renderPage('linklist'); exit; } // ----------------------------------------------------------------------------------------------- // Process the import file form. function importFile() { if (!(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'])) { die('Not allowed.'); } $LINKSDB = new LinkDB( $GLOBALS['config']['DATASTORE'], isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'], $GLOBALS['config']['HIDE_PUBLIC_LINKS'] ); $filename=$_FILES['filetoupload']['name']; $filesize=$_FILES['filetoupload']['size']; $data=file_get_contents($_FILES['filetoupload']['tmp_name']); $private = (empty($_POST['private']) ? 0 : 1); // Should the links be imported as private? $overwrite = !empty($_POST['overwrite']) ; // Should the imported links overwrite existing ones? $import_count=0; // Sniff file type: $type='unknown'; if (startsWith($data,'<!DOCTYPE NETSCAPE-Bookmark-file-1>')) $type='netscape'; // Netscape bookmark file (aka Firefox). // Then import the bookmarks. if ($type=='netscape') { // This is a standard Netscape-style bookmark file. // This format is supported by all browsers (except IE, of course), also Delicious, Diigo and others. foreach(explode('<DT>',$data) as $html) // explode is very fast { $link = array('linkdate'=>'','title'=>'','url'=>'','description'=>'','tags'=>'','private'=>0); $d = explode('<DD>',$html); if (startswith($d[0],'<A ')) { $link['description'] = (isset($d[1]) ? html_entity_decode(trim($d[1]),ENT_QUOTES,'UTF-8') : ''); // Get description (optional) preg_match('!<A .*?>(.*?)</A>!i',$d[0],$matches); $link['title'] = (isset($matches[1]) ? trim($matches[1]) : ''); // Get title $link['title'] = html_entity_decode($link['title'],ENT_QUOTES,'UTF-8'); preg_match_all('! ([A-Z_]+)=\"(.*?)"!i',$html,$matches,PREG_SET_ORDER); // Get all other attributes $raw_add_date=0; foreach($matches as $m) { $attr=$m[1]; $value=$m[2]; if ($attr=='HREF') $link['url']=html_entity_decode($value,ENT_QUOTES,'UTF-8'); elseif ($attr=='ADD_DATE') { $raw_add_date=intval($value); if ($raw_add_date>30000000000) $raw_add_date/=1000; //If larger than year 2920, then was likely stored in milliseconds instead of seconds } elseif ($attr=='PRIVATE') $link['private']=($value=='0'?0:1); elseif ($attr=='TAGS') $link['tags']=html_entity_decode(str_replace(',',' ',$value),ENT_QUOTES,'UTF-8'); } if ($link['url']!='') { if ($private==1) $link['private']=1; $dblink = $LINKSDB->getLinkFromUrl($link['url']); // See if the link is already in database. if ($dblink==false) { // Link not in database, let's import it... if (empty($raw_add_date)) $raw_add_date=time(); // In case of shitty bookmark file with no ADD_DATE // Make sure date/time is not already used by another link. // (Some bookmark files have several different links with the same ADD_DATE) // We increment date by 1 second until we find a date which is not used in DB. // (so that links that have the same date/time are more or less kept grouped by date, but do not conflict.) while (!empty($LINKSDB[date('Ymd_His',$raw_add_date)])) { $raw_add_date++; }// Yes, I know it's ugly. $link['linkdate']=date('Ymd_His',$raw_add_date); $LINKSDB[$link['linkdate']] = $link; $import_count++; } else // Link already present in database. { if ($overwrite) { // If overwrite is required, we import link data, except date/time. $link['linkdate']=$dblink['linkdate']; $LINKSDB[$link['linkdate']] = $link; $import_count++; } } } } } $LINKSDB->savedb(); echo '<script>alert("File '.json_encode($filename).' ('.$filesize.' bytes) was successfully processed: '.$import_count.' links imported.");document.location=\'?\';</script>'; } else { echo '<script>alert("File '.json_encode($filename).' ('.$filesize.' bytes) has an unknown file format. Nothing was imported.");document.location=\'?\';</script>'; } } // ----------------------------------------------------------------------------------------------- // Template for the list of links (<div id="linklist">) // This function fills all the necessary fields in the $PAGE for the template 'linklist.html' function buildLinkList($PAGE,$LINKSDB) { // ---- Filter link database according to parameters $linksToDisplay=array(); $search_type=''; $search_crits=''; if (isset($_GET['searchterm'])) // Fulltext search { $linksToDisplay = $LINKSDB->filterFulltext(trim($_GET['searchterm'])); $search_crits=escape(trim($_GET['searchterm'])); $search_type='fulltext'; } elseif (isset($_GET['searchtags'])) // Search by tag { $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags'])); $search_crits=explode(' ',escape(trim($_GET['searchtags']))); $search_type='tags'; } elseif (isset($_SERVER['QUERY_STRING']) && preg_match('/[a-zA-Z0-9-_@]{6}(&.+?)?/',$_SERVER['QUERY_STRING'])) // Detect smallHashes in URL { $linksToDisplay = $LINKSDB->filterSmallHash(substr(trim($_SERVER["QUERY_STRING"], '/'),0,6)); if (count($linksToDisplay)==0) { header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found"); echo '<h1>404 Not found.</h1>Oh crap. The link you are trying to reach does not exist or has been deleted.'; echo '<br>Would you mind <a href="?">clicking here</a>?'; exit; } $search_type='permalink'; } else $linksToDisplay = $LINKSDB; // Otherwise, display without filtering. // Option: Show only private links if (!empty($_SESSION['privateonly'])) { $tmp = array(); foreach($linksToDisplay as $linkdate=>$link) { if ($link['private']!=0) $tmp[$linkdate]=$link; } $linksToDisplay=$tmp; } // ---- Handle paging. /* Can someone explain to me why you get the following error when using array_keys() on an object which implements the interface ArrayAccess??? "Warning: array_keys() expects parameter 1 to be array, object given in ... " If my class implements ArrayAccess, why won't array_keys() accept it ? ( $keys=array_keys($linksToDisplay); ) */ $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // Stupid and ugly. Thanks PHP. // If there is only a single link, we change on-the-fly the title of the page. if (count($linksToDisplay)==1) $GLOBALS['pagetitle'] = $linksToDisplay[$keys[0]]['title'].' - '.$GLOBALS['title']; // Select articles according to paging. $pagecount = ceil(count($keys)/$_SESSION['LINKS_PER_PAGE']); $pagecount = ($pagecount==0 ? 1 : $pagecount); $page=( empty($_GET['page']) ? 1 : intval($_GET['page'])); $page = ( $page<1 ? 1 : $page ); $page = ( $page>$pagecount ? $pagecount : $page ); $i = ($page-1)*$_SESSION['LINKS_PER_PAGE']; // Start index. $end = $i+$_SESSION['LINKS_PER_PAGE']; $linkDisp=array(); // Links to display while ($i<$end && $i<count($keys)) { $link = $linksToDisplay[$keys[$i]]; $link['description']=nl2br(keepMultipleSpaces(text2clickable($link['description']))); $title=$link['title']; $classLi = $i%2!=0 ? '' : 'publicLinkHightLight'; $link['class'] = ($link['private']==0 ? $classLi : 'private'); $link['timestamp']=linkdate2timestamp($link['linkdate']); $taglist = explode(' ',$link['tags']); uasort($taglist, 'strcasecmp'); $link['taglist']=$taglist; if ($link["url"][0] === '?' && // Check for both signs of a note: starting with ? and 7 chars long. I doubt that you'll post any links that look like this. strlen($link["url"]) === 7) { $link["url"] = indexUrl() . $link["url"]; } $linkDisp[$keys[$i]] = $link; $i++; } // Compute paging navigation $searchterm= ( empty($_GET['searchterm']) ? '' : '&searchterm='.$_GET['searchterm'] ); $searchtags= ( empty($_GET['searchtags']) ? '' : '&searchtags='.$_GET['searchtags'] ); $paging=''; $previous_page_url=''; if ($i!=count($keys)) $previous_page_url='?page='.($page+1).$searchterm.$searchtags; $next_page_url='';if ($page>1) $next_page_url='?page='.($page-1).$searchterm.$searchtags; $token = ''; if (isLoggedIn()) $token=getToken(); // Fill all template fields. $PAGE->assign('linkcount',count($LINKSDB)); $PAGE->assign('previous_page_url',$previous_page_url); $PAGE->assign('next_page_url',$next_page_url); $PAGE->assign('page_current',$page); $PAGE->assign('page_max',$pagecount); $PAGE->assign('result_count',count($linksToDisplay)); $PAGE->assign('search_type',$search_type); $PAGE->assign('search_crits',$search_crits); $PAGE->assign('redirector',empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector']); // Optional redirector URL. $PAGE->assign('token',$token); $PAGE->assign('links',$linkDisp); $PAGE->assign('tags', $LINKSDB->allTags()); return; } // Compute the thumbnail for a link. // // With a link to the original URL. // Understands various services (youtube.com...) // Input: $url = URL for which the thumbnail must be found. // $href = if provided, this URL will be followed instead of $url // Returns an associative array with thumbnail attributes (src,href,width,height,style,alt) // Some of them may be missing. // Return an empty array if no thumbnail available. function computeThumbnail($url,$href=false) { if (!$GLOBALS['config']['ENABLE_THUMBNAILS']) return array(); if ($href==false) $href=$url; // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link. // (e.g. http://www.youtube.com/watch?v=spVypYk4kto ---> http://img.youtube.com/vi/spVypYk4kto/default.jpg ) // ^^^^^^^^^^^ ^^^^^^^^^^^ $domain = parse_url($url,PHP_URL_HOST); if ($domain=='youtube.com' || $domain=='www.youtube.com') { parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg', 'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail'); } if ($domain=='youtu.be') // Youtube short links { $path = parse_url($url,PHP_URL_PATH); return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg', 'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail'); } if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting { parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename. if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']), 'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail'); } if ($domain=='imgur.com') { $path = parse_url($url,PHP_URL_PATH); if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available. if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg', 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail'); if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg', 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail'); if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg', 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail'); } if ($domain=='i.imgur.com') { $pi = pathinfo(parse_url($url,PHP_URL_PATH)); if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg', 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail'); } if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com') { if (strpos($url,'dailymotion.com/video/')!==false) { $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url); return array('src'=>$thumburl, 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail'); } } if (endsWith($domain,'.imageshack.us')) { $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION)); if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif') { $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext; return array('src'=>$thumburl, 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail'); } } // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL. // So we deport the thumbnail generation in order not to slow down page generation // (and we also cache the thumbnail) if (!$GLOBALS['config']['ENABLE_LOCALCACHE']) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache. if ($domain=='flickr.com' || endsWith($domain,'.flickr.com') || $domain=='vimeo.com' || $domain=='ted.com' || endsWith($domain,'.ted.com') || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com') ) { if ($domain=='vimeo.com') { // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric) $path = parse_url($url,PHP_URL_PATH); if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL. } if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com')) { // Make sure this URL points to a single comic (/xxx... where xxx is numeric) $path = parse_url($url,PHP_URL_PATH); if (!preg_match('!/\d+.+?!',$path)) return array(); } if ($domain=='ted.com' || endsWith($domain,'.ted.com')) { // Make sure this TED URL points to a video (/talks/...) $path = parse_url($url,PHP_URL_PATH); if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL. } $sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation) return array('src'=>indexUrl().'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url), 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail'); } // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif // Technically speaking, we should download ALL links and check their Content-Type to see if they are images. // But using the extension will do. $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION)); if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif') { $sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation) return array('src'=>indexUrl().'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url), 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail'); } return array(); // No thumbnail. } // Returns the HTML code to display a thumbnail for a link // with a link to the original URL. // Understands various services (youtube.com...) // Input: $url = URL for which the thumbnail must be found. // $href = if provided, this URL will be followed instead of $url // Returns '' if no thumbnail available. function thumbnail($url,$href=false) { $t = computeThumbnail($url,$href); if (count($t)==0) return ''; // Empty array = no thumbnail for this URL. $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"'; if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"'; if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"'; if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"'; if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"'; $html.='></a>'; return $html; } // Returns the HTML code to display a thumbnail for a link // for the picture wall (using lazy image loading) // Understands various services (youtube.com...) // Input: $url = URL for which the thumbnail must be found. // $href = if provided, this URL will be followed instead of $url // Returns '' if no thumbnail available. function lazyThumbnail($url,$href=false) { $t = computeThumbnail($url,$href); if (count($t)==0) return ''; // Empty array = no thumbnail for this URL. $html='<a href="'.escape($t['href']).'">'; // Lazy image $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"'; if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"'; if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"'; if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"'; if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"'; $html.='>'; // No-JavaScript fallback. $html.='<noscript><img src="'.escape($t['src']).'"'; if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"'; if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"'; if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"'; if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"'; $html.='></noscript></a>'; return $html; } // ----------------------------------------------------------------------------------------------- // Installation // This function should NEVER be called if the file data/config.php exists. function install() { // On free.fr host, make sure the /sessions directory exists, otherwise login will not work. if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705); // This part makes sure sessions works correctly. // (Because on some hosts, session.save_path may not be set correctly, // or we may not have write access to it.) if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working')) { // Step 2: Check if data in session is correct. echo '<pre>Sessions do not seem to work correctly on your server.<br>'; echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>'; echo 'It currently points to '.session_save_path().'<br>'; echo 'Check that the hostname used to access Shaarli contains a dot. On some browsers, accessing your server via a hostname like \'localhost\' or any custom hostname without a dot causes cookie storage to fail. We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'; echo '<br><a href="?">Click to try again.</a></pre>'; die; } if (!isset($_SESSION['session_tested'])) { // Step 1 : Try to store data in session and reload page. $_SESSION['session_tested'] = 'Working'; // Try to set a variable in session. header('Location: '.indexUrl().'?test_session'); // Redirect to check stored data. } if (isset($_GET['test_session'])) { // Step 3: Sessions are OK. Remove test parameter from URL. header('Location: '.indexUrl()); } if (!empty($_POST['setlogin']) && !empty($_POST['setpassword'])) { $tz = 'UTC'; if (!empty($_POST['continent']) && !empty($_POST['city'])) { if (isTimeZoneValid($_POST['continent'], $_POST['city'])) { $tz = $_POST['continent'].'/'.$_POST['city']; } } $GLOBALS['timezone'] = $tz; // Everything is ok, let's create config file. $GLOBALS['login'] = $_POST['setlogin']; $GLOBALS['salt'] = sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless. $GLOBALS['hash'] = sha1($_POST['setpassword'].$GLOBALS['login'].$GLOBALS['salt']); $GLOBALS['title'] = (empty($_POST['title']) ? 'Shared links on '.escape(indexUrl()) : $_POST['title'] ); $GLOBALS['config']['ENABLE_UPDATECHECK'] = !empty($_POST['updateCheck']); try { writeConfig($GLOBALS, isLoggedIn()); } catch(Exception $e) { error_log( 'ERROR while writing config file after installation.' . PHP_EOL . $e->getMessage() ); // TODO: do not handle exceptions/errors in JS. echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>'; exit; } echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>'; exit; } // Display config form: list($timezone_form, $timezone_js) = generateTimeZoneForm(); $timezone_html = ''; if ($timezone_form != '') { $timezone_html = '<tr><td><b>Timezone:</b></td><td>'.$timezone_form.'</td></tr>'; } $PAGE = new pageBuilder; $PAGE->assign('timezone_html',$timezone_html); $PAGE->assign('timezone_js',$timezone_js); $PAGE->renderPage('install'); exit; } if (!function_exists('json_encode')) { function json_encode($data) { switch ($type = gettype($data)) { case 'NULL': return 'null'; case 'boolean': return ($data ? 'true' : 'false'); case 'integer': case 'double': case 'float': return $data; case 'string': return '"' . addslashes($data) . '"'; case 'object': $data = get_object_vars($data); case 'array': $output_index_count = 0; $output_indexed = array(); $output_associative = array(); foreach ($data as $key => $value) { $output_indexed[] = json_encode($value); $output_associative[] = json_encode($key) . ':' . json_encode($value); if ($output_index_count !== NULL && $output_index_count++ !== $key) { $output_index_count = NULL; } } if ($output_index_count !== NULL) { return '[' . implode(',', $output_indexed) . ']'; } else { return '{' . implode(',', $output_associative) . '}'; } default: return ''; // Not supported } } } /* Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL, I have deported the thumbnail URL code generation here, otherwise this would slow down page generation. The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail. This function is called by passing the URL: http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL] [URL] is the URL of the link (e.g. a flickr page) [HMAC] is the signature for the [URL] (so that these URL cannot be forged). The function below will fetch the image from the webservice and store it in the cache. */ function genThumbnail() { // Make sure the parameters in the URL were generated by us. $sign = hash_hmac('sha256', $_GET['url'], $GLOBALS['salt']); if ($sign!=$_GET['hmac']) die('Naughty boy!'); // Let's see if we don't already have the image for this URL in the cache. $thumbname=hash('sha1',$_GET['url']).'.jpg'; if (is_file($GLOBALS['config']['CACHEDIR'].'/'.$thumbname)) { // We have the thumbnail, just serve it: header('Content-Type: image/jpeg'); echo file_get_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname); return; } // We may also serve a blank image (if service did not respond) $blankname=hash('sha1',$_GET['url']).'.gif'; if (is_file($GLOBALS['config']['CACHEDIR'].'/'.$blankname)) { header('Content-Type: image/gif'); echo file_get_contents($GLOBALS['config']['CACHEDIR'].'/'.$blankname); return; } // Otherwise, generate the thumbnail. $url = $_GET['url']; $domain = parse_url($url,PHP_URL_HOST); if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')) { // Crude replacement to handle new flickr domain policy (They prefer www. now) $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url); // Is this a link to an image, or to a flickr page ? $imageurl=''; if (endswith(parse_url($url,PHP_URL_PATH),'.jpg')) { // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches); if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg'; } else // This is a flickr page (html) { list($httpstatus,$headers,$data) = getHTTP($url,20); // Get the flickr html page. if (strpos($httpstatus,'200 OK')!==false) { // flickr now nicely provides the URL of the thumbnail in each flickr page. preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!',$data,$matches); if (!empty($matches[1])) $imageurl=$matches[1]; // In albums (and some other pages), the link rel="image_src" is not provided, // but flickr provides: // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" /> if ($imageurl=='') { preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!',$data,$matches); if (!empty($matches[1])) $imageurl=$matches[1]; } } } if ($imageurl!='') { // Let's download the image. list($httpstatus,$headers,$data) = getHTTP($imageurl,10); // Image is 240x120, so 10 seconds to download should be enough. if (strpos($httpstatus,'200 OK')!==false) { file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname,$data); // Save image to cache. header('Content-Type: image/jpeg'); echo $data; return; } } } elseif ($domain=='vimeo.com' ) { // This is more complex: we have to perform a HTTP request, then parse the result. // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098 $vid = substr(parse_url($url,PHP_URL_PATH),1); list($httpstatus,$headers,$data) = getHTTP('https://vimeo.com/api/v2/video/'.escape($vid).'.php',5); if (strpos($httpstatus,'200 OK')!==false) { $t = unserialize($data); $imageurl = $t[0]['thumbnail_medium']; // Then we download the image and serve it to our client. list($httpstatus,$headers,$data) = getHTTP($imageurl,10); if (strpos($httpstatus,'200 OK')!==false) { file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname,$data); // Save image to cache. header('Content-Type: image/jpeg'); echo $data; return; } } } elseif ($domain=='ted.com' || endsWith($domain,'.ted.com')) { // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" /> list($httpstatus,$headers,$data) = getHTTP($url,5); if (strpos($httpstatus,'200 OK')!==false) { // Extract the link to the thumbnail preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!',$data,$matches); if (!empty($matches[1])) { // Let's download the image. $imageurl=$matches[1]; list($httpstatus,$headers,$data) = getHTTP($imageurl,20); // No control on image size, so wait long enough. if (strpos($httpstatus,'200 OK')!==false) { $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname; file_put_contents($filepath,$data); // Save image to cache. if (resizeImage($filepath)) { header('Content-Type: image/jpeg'); echo file_get_contents($filepath); return; } } } } } elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com')) { // There is no thumbnail available for xkcd comics, so download the whole image and resize it. // http://xkcd.com/327/ // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" /> list($httpstatus,$headers,$data) = getHTTP($url,5); if (strpos($httpstatus,'200 OK')!==false) { // Extract the link to the thumbnail preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!',$data,$matches); if (!empty($matches[1])) { // Let's download the image. $imageurl=$matches[1]; list($httpstatus,$headers,$data) = getHTTP($imageurl,20); // No control on image size, so wait long enough. if (strpos($httpstatus,'200 OK')!==false) { $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname; file_put_contents($filepath,$data); // Save image to cache. if (resizeImage($filepath)) { header('Content-Type: image/jpeg'); echo file_get_contents($filepath); return; } } } } } else { // For all other domains, we try to download the image and make a thumbnail. list($httpstatus,$headers,$data) = getHTTP($url,30); // We allow 30 seconds max to download (and downloads are limited to 4 Mb) if (strpos($httpstatus,'200 OK')!==false) { $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname; file_put_contents($filepath,$data); // Save image to cache. if (resizeImage($filepath)) { header('Content-Type: image/jpeg'); echo file_get_contents($filepath); return; } } } // Otherwise, return an empty image (8x8 transparent gif) $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7'); file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$blankname,$blankgif); // Also put something in cache so that this URL is not requested twice. header('Content-Type: image/gif'); echo $blankgif; } // Make a thumbnail of the image (to width: 120 pixels) // Returns true if success, false otherwise. function resizeImage($filepath) { if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible. // Trick: some stupid people rename GIF as JPEG... or else. // So we really try to open each image type whatever the extension is. $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type. $im=false; $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough. $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath); $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath); if (!$im) return false; // Unable to open image (corrupted or not an image) $w = imagesx($im); $h = imagesy($im); $ystart = 0; $yheight=$h; if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; } $nw = 120; // Desired width $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height. // Resize image: $im2 = imagecreatetruecolor($nw,$nh); imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight); imageinterlace($im2,true); // For progressive JPEG. $tempname=$filepath.'_TEMP.jpg'; imagejpeg($im2, $tempname, 90); imagedestroy($im); imagedestroy($im2); unlink($filepath); rename($tempname,$filepath); // Overwrite original picture with thumbnail. return true; } // Invalidate caches when the database is changed or the user logs out. // (e.g. tags cache). function invalidateCaches() { unset($_SESSION['tags']); // Purge cache attached to session. pageCache::purgeCache(); // Purge page cache shared by sessions. } try { mergeDeprecatedConfig($GLOBALS, isLoggedIn()); } catch(Exception $e) { error_log( 'ERROR while merging deprecated options.php file.' . PHP_EOL . $e->getMessage() ); } if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=genthumbnail')) { genThumbnail(); exit; } // Thumbnail generation/cache does not need the link database. if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=rss')) { showRSS(); exit; } if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=atom')) { showATOM(); exit; } if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=dailyrss')) { showDailyRSS(); exit; } if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=daily')) { showDaily(); exit; } if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=$GLOBALS['config']['LINKS_PER_PAGE']; renderPage(); ?>