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index.php
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index.php
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<?php
/**
* Shaarli v0.5.4 - Shaare your links...
*
* The personal, minimalist, super-fast, no-database Delicious clone.
*
* Friendly fork by the Shaarli community:
* - https://github.com/shaarli/Shaarli
*
* Original project by sebsauvage.net:
* - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
* - https://github.com/sebsauvage/Shaarli
*
* Licence: http://www.opensource.org/licenses/zlib-license.php
*
* Requires: PHP 5.3.x
*/
// Set 'UTC' as the default timezone if it is not defined in php.ini
// See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
if (date_default_timezone_get() == '') {
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.
$GLOBALS['config']['HIDE_PUBLIC_LINKS'] = false;
// -----------------------------------------------------------------------------------------------
define('shaarli_version', '0.5.4');
// http://server.com/x/shaarli --> /shaarli/
define('WEB_PATH', substr($_SERVER["REQUEST_URI"], 0, 1+strrpos($_SERVER["REQUEST_URI"], '/', 0)));
// PHP Settings
ini_set('max_input_time','60'); // High execution time in case of problematic imports/exports.
ini_set('memory_limit', '128M'); // Try to set max upload file size and read (May not work on some hosts).
ini_set('post_max_size', '16M');
ini_set('upload_max_filesize', '16M');
error_reporting(E_ALL^E_WARNING); // See all error except warnings.
//error_reporting(-1); // See all errors (for debugging only)
// User configuration
if (is_file($GLOBALS['config']['CONFIG_FILE'])) {
require_once $GLOBALS['config']['CONFIG_FILE'];
}
// Shaarli library
require_once 'application/Cache.php';
require_once 'application/CachedPage.php';
require_once 'application/HttpUtils.php';
require_once 'application/LinkDB.php';
require_once 'application/TimeZone.php';
require_once 'application/Url.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;
}
// Force cookie path (but do not change lifetime)
$cookie = session_get_cookie_params();
$cookiedir = '';
if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
$cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
}
// Set default cookie expiration and path.
session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
// Set session parameters on server side.
// If the user does not access any page within this time, his/her session is considered expired.
define('INACTIVITY_TIMEOUT', 3600); // in seconds.
// Use cookies to store session.
ini_set('session.use_cookies', 1);
// Force cookies for session (phpsessionID forbidden in URL).
ini_set('session.use_only_cookies', 1);
// Prevent PHP form using sessionID in URL if cookies are disabled.
ini_set('session.use_trans_sid', false);
session_name('shaarli');
// Start session if needed (Some server auto-start sessions).
if (session_id() == '') {
session_start();
}
// Regenerate session ID if invalid or not defined in cookie.
if (isset($_COOKIE['shaarli']) && !is_session_id_valid($_COOKIE['shaarli'])) {
session_regenerate_id(true);
$_COOKIE['shaarli'] = session_id();
}
include "inc/rain.tpl.class.php"; //include Rain TPL
raintpl::$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'])) $GLOBALS['title']='Shared links on '.escape(index_url($_SERVER));
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'])))
{
$version = shaarli_version;
list($headers, $data) = get_http_url('https://raw.githubusercontent.com/shaarli/Shaarli/master/shaarli_version.php', 2);
if (strpos($headers[0], '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 $newestversion;
return '';
}
// -----------------------------------------------------------------------------------------------
// Log to text file
function logm($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']);
$topic_url = array (
index_url($_SERVER).'?do=atom',
index_url($_SERVER).'?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'])) {
$uri = '?post='. urlencode($_GET['post']);
foreach (array('description', 'source', 'title') as $param) {
if (!empty($_GET[$param])) {
$uri .= '&'.$param.'='.urlencode($_GET[$param]);
}
}
header('Location: '. $uri);
exit;
}
if (isset($_GET['edit_link'])) {
header('Location: ?edit_link='. escape($_GET['edit_link']));
exit;
}
if (isset($_POST['returnurl'])) {
// Prevent loops over login screen.
if (strpos($_POST['returnurl'], 'do=login') === false) {
header('Location: '. escape($_POST['returnurl']));
exit;
}
}
header('Location: ?'); exit;
}
else
{
ban_loginFailed();
$redir = '';
if (isset($_GET['post'])) {
$redir = '?post=' . urlencode($_GET['post']);
foreach (array('description', 'source', 'title') as $param) {
if (!empty($_GET[$param])) {
$redir .= '&' . $param . '=' . urlencode($_GET[$param]);
}
}
}
echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
exit;
}
}
// ------------------------------------------------------------------------------------------
// Misc utility functions:
// 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.
}
// 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()));
$this->tpl->assign('feedurl',escape(index_url($_SERVER)));
$searchcrits=''; // Search criteria
if (!empty($_GET['searchtags'])) $searchcrits.='&searchtags='.urlencode($_GET['searchtags']);
elseif (!empty($_GET['searchterm'])) $searchcrits.='&searchterm='.urlencode($_GET['searchterm']);
$this->tpl->assign('searchcrits',$searchcrits);
$this->tpl->assign('source',index_url($_SERVER));
$this->tpl->assign('version',shaarli_version);
$this->tpl->assign('scripturl',index_url($_SERVER));
$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 CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
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) ;
}
$pageaddr=escape(index_url($_SERVER));
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";
$i++;
}
echo '</channel></rss><!-- Cached version of '.escape(page_url($_SERVER)).' -->';
$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 CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
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) ;
}
$pageaddr=escape(index_url($_SERVER));
$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>';
$feed.='<link rel="self" href="'.escape(server_url($_SERVER).$_SERVER["REQUEST_URI"]).'" />';
if (!empty($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;
$feed.='</feed><!-- Cached version of '.escape(page_url($_SERVER)).' -->';
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 CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
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');
$pageaddr = escape(index_url($_SERVER));
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');
$absurl = escape(index_url($_SERVER).'?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'], '?')) {
$l['url'] = index_url($_SERVER) . $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 $html . PHP_EOL;
}
echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
$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($_SERVER["QUERY_STRING"],'do=logout'))
{
invalidateCaches($GLOBALS['config']['PAGECACHE']);