index.php

   1 <?php
   2 /**
   3  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   4  *
   5  * Friendly fork by the Shaarli community:
   6  *  - https://github.com/shaarli/Shaarli
   7  *
   8  * Original project by sebsauvage.net:
   9  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  10  *  - https://github.com/sebsauvage/Shaarli
  11  *
  12  * Licence: http://www.opensource.org/licenses/zlib-license.php
  13  *
  14  * Requires: PHP 5.5.x
  15  */
  16
  17 // Set 'UTC' as the default timezone if it is not defined in php.ini
  18 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  19 if (date_default_timezone_get() == '') {
  20     date_default_timezone_set('UTC');
  21 }
  22
  23 /*
  24  * PHP configuration
  25  */
  26
  27 // http://server.com/x/shaarli --> /shaarli/
  28 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  29
  30 // High execution time in case of problematic imports/exports.
  31 ini_set('max_input_time','60');
  32
  33 // Try to set max upload file size and read
  34 ini_set('memory_limit', '128M');
  35 ini_set('post_max_size', '16M');
  36 ini_set('upload_max_filesize', '16M');
  37
  38 // See all error except warnings
  39 error_reporting(E_ALL^E_WARNING);
  40 // See all errors (for debugging only)
  41 //error_reporting(-1);
  42
  43
  44 // 3rd-party libraries
  45 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  46     header('Content-Type: text/plain; charset=utf-8');
  47     echo "Error: missing Composer configuration\n\n"
  48         ."If you installed Shaarli through Git or using the development branch,\n"
  49         ."please refer to the installation documentation to install PHP"
  50         ." dependencies using Composer:\n"
  51         ."- https://shaarli.readthedocs.io/en/master/Server-requirements/\n"
  52         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  53     exit;
  54 }
  55 require_once 'inc/rain.tpl.class.php';
  56 require_once __DIR__ . '/vendor/autoload.php';
  57
  58 // Shaarli library
  59 require_once 'application/ApplicationUtils.php';
  60 require_once 'application/Cache.php';
  61 require_once 'application/CachedPage.php';
  62 require_once 'application/config/ConfigPlugin.php';
  63 require_once 'application/FeedBuilder.php';
  64 require_once 'application/FileUtils.php';
  65 require_once 'application/History.php';
  66 require_once 'application/HttpUtils.php';
  67 require_once 'application/LinkDB.php';
  68 require_once 'application/LinkFilter.php';
  69 require_once 'application/LinkUtils.php';
  70 require_once 'application/NetscapeBookmarkUtils.php';
  71 require_once 'application/PageBuilder.php';
  72 require_once 'application/TimeZone.php';
  73 require_once 'application/Url.php';
  74 require_once 'application/Utils.php';
  75 require_once 'application/PluginManager.php';
  76 require_once 'application/Router.php';
  77 require_once 'application/Updater.php';
  78 use \Shaarli\Languages;
  79 use \Shaarli\ThemeUtils;
  80 use \Shaarli\Config\ConfigManager;
  81 use \Shaarli\SessionManager;
  82
  83 // Ensure the PHP version is supported
  84 try {
  85     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  86 } catch(Exception $exc) {
  87     header('Content-Type: text/plain; charset=utf-8');
  88     echo $exc->getMessage();
  89     exit;
  90 }
  91
  92 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  93
  94 // Force cookie path (but do not change lifetime)
  95 $cookie = session_get_cookie_params();
  96 $cookiedir = '';
  97 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
  98     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
  99 }
 100 // Set default cookie expiration and path.
 101 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 102 // Set session parameters on server side.
 103 // If the user does not access any page within this time, his/her session is considered expired.
 104 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
 105 // Use cookies to store session.
 106 ini_set('session.use_cookies', 1);
 107 // Force cookies for session (phpsessionID forbidden in URL).
 108 ini_set('session.use_only_cookies', 1);
 109 // Prevent PHP form using sessionID in URL if cookies are disabled.
 110 ini_set('session.use_trans_sid', false);
 111
 112 session_name('shaarli');
 113 // Start session if needed (Some server auto-start sessions).
 114 if (session_id() == '') {
 115     session_start();
 116 }
 117
 118 // Regenerate session ID if invalid or not defined in cookie.
 119 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 120     session_regenerate_id(true);
 121     $_COOKIE['shaarli'] = session_id();
 122 }
 123
 124 $conf = new ConfigManager();
 125 $sessionManager = new SessionManager($_SESSION, $conf);
 126
 127 // Sniff browser language and set date format accordingly.
 128 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 129     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 130 }
 131
 132 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 133
 134 $conf->setEmpty('general.timezone', date_default_timezone_get());
 135 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 136 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 137 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 138
 139 $pluginManager = new PluginManager($conf);
 140 $pluginManager->load($conf->get('general.enabled_plugins'));
 141
 142 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 143
 144 ob_start();  // Output buffering for the page cache.
 145
 146 // Prevent caching on client side or proxy: (yes, it's ugly)
 147 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 148 header("Cache-Control: no-store, no-cache, must-revalidate");
 149 header("Cache-Control: post-check=0, pre-check=0", false);
 150 header("Pragma: no-cache");
 151
 152 if (! is_file($conf->getConfigFileExt())) {
 153     // Ensure Shaarli has proper access to its resources
 154     $errors = ApplicationUtils::checkResourcePermissions($conf);
 155
 156     if ($errors != array()) {
 157         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 158
 159         foreach ($errors as $error) {
 160             $message .= '<li>'.$error.'</li>';
 161         }
 162         $message .= '</ul>';
 163
 164         header('Content-Type: text/html; charset=utf-8');
 165         echo $message;
 166         exit;
 167     }
 168
 169     // Display the installation form if no existing config is found
 170     install($conf, $sessionManager);
 171 }
 172
 173 // a token depending of deployment salt, user password, and the current ip
 174 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 175
 176 /**
 177  * Checking session state (i.e. is the user still logged in)
 178  *
 179  * @param ConfigManager $conf The configuration manager.
 180  *
 181  * @return bool: true if the user is logged in, false otherwise.
 182  */
 183 function setup_login_state($conf)
 184 {
 185     if ($conf->get('security.open_shaarli')) {
 186         return true;
 187     }
 188     $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 189     $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 190     if (! $conf->exists('credentials.login')) {
 191         $userIsLoggedIn = false;  // Shaarli is not configured yet.
 192         $loginFailure = true;
 193     }
 194     if (isset($_COOKIE['shaarli_staySignedIn']) &&
 195         $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 196         !$loginFailure)
 197     {
 198         fillSessionInfo($conf);
 199         $userIsLoggedIn = true;
 200     }
 201     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 202     if (empty($_SESSION['uid'])
 203         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 204         || time() >= $_SESSION['expires_on'])
 205     {
 206         logout();
 207         $userIsLoggedIn = false;
 208         $loginFailure = true;
 209     }
 210     if (!empty($_SESSION['longlastingsession'])) {
 211         $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 212     }
 213     else {
 214         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 215     }
 216     if (!$loginFailure) {
 217         $userIsLoggedIn = true;
 218     }
 219
 220     return $userIsLoggedIn;
 221 }
 222 $userIsLoggedIn = setup_login_state($conf);
 223
 224 // ------------------------------------------------------------------------------------------
 225 // Session management
 226
 227 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 228 function allIPs()
 229 {
 230     $ip = $_SERVER['REMOTE_ADDR'];
 231     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 232     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 233     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 234     return $ip;
 235 }
 236
 237 /**
 238  * Load user session.
 239  *
 240  * @param ConfigManager $conf Configuration Manager instance.
 241  */
 242 function fillSessionInfo($conf)
 243 {
 244     $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 245     $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 246     $_SESSION['username']= $conf->get('credentials.login');
 247     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 248 }
 249
 250 /**
 251  * Check that user/password is correct.
 252  *
 253  * @param string        $login    Username
 254  * @param string        $password User password
 255  * @param ConfigManager $conf     Configuration Manager instance.
 256  *
 257  * @return bool: authentication successful or not.
 258  */
 259 function check_auth($login, $password, $conf)
 260 {
 261     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 262     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 263     {   // Login/password is correct.
 264         fillSessionInfo($conf);
 265         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 266         return true;
 267     }
 268     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 269     return false;
 270 }
 271
 272 // Returns true if the user is logged in.
 273 function isLoggedIn()
 274 {
 275     global $userIsLoggedIn;
 276     return $userIsLoggedIn;
 277 }
 278
 279 // Force logout.
 280 function logout() {
 281     if (isset($_SESSION)) {
 282         unset($_SESSION['uid']);
 283         unset($_SESSION['ip']);
 284         unset($_SESSION['username']);
 285         unset($_SESSION['privateonly']);
 286         unset($_SESSION['untaggedonly']);
 287     }
 288     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 289 }
 290
 291
 292 // ------------------------------------------------------------------------------------------
 293 // Brute force protection system
 294 // Several consecutive failed logins will ban the IP address for 30 minutes.
 295 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
 296     // FIXME! globals
 297     file_put_contents(
 298         $conf->get('resource.ban_file', 'data/ipbans.php'),
 299         "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
 300     );
 301 }
 302 include $conf->get('resource.ban_file', 'data/ipbans.php');
 303 /**
 304  * Signal a failed login. Will ban the IP if too many failures:
 305  *
 306  * @param ConfigManager $conf Configuration Manager instance.
 307  */
 308 function ban_loginFailed($conf)
 309 {
 310     $ip = $_SERVER['REMOTE_ADDR'];
 311     $trusted = $conf->get('security.trusted_proxies', array());
 312     if (in_array($ip, $trusted)) {
 313         $ip = getIpAddressFromProxy($_SERVER, $trusted);
 314         if (!$ip) {
 315             return;
 316         }
 317     }
 318     $gb = $GLOBALS['IPBANS'];
 319     if (! isset($gb['FAILURES'][$ip])) {
 320         $gb['FAILURES'][$ip]=0;
 321     }
 322     $gb['FAILURES'][$ip]++;
 323     if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
 324     {
 325         $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
 326         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
 327     }
 328     $GLOBALS['IPBANS'] = $gb;
 329     file_put_contents(
 330         $conf->get('resource.ban_file', 'data/ipbans.php'),
 331         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 332     );
 333 }
 334
 335 /**
 336  * Signals a successful login. Resets failed login counter.
 337  *
 338  * @param ConfigManager $conf Configuration Manager instance.
 339  */
 340 function ban_loginOk($conf)
 341 {
 342     $ip = $_SERVER['REMOTE_ADDR'];
 343     $gb = $GLOBALS['IPBANS'];
 344     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 345     $GLOBALS['IPBANS'] = $gb;
 346     file_put_contents(
 347         $conf->get('resource.ban_file', 'data/ipbans.php'),
 348         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 349     );
 350 }
 351
 352 /**
 353  * Checks if the user CAN login. If 'true', the user can try to login.
 354  *
 355  * @param ConfigManager $conf Configuration Manager instance.
 356  *
 357  * @return bool: true if the user is allowed to login.
 358  */
 359 function ban_canLogin($conf)
 360 {
 361     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 362     if (isset($gb['BANS'][$ip]))
 363     {
 364         // User is banned. Check if the ban has expired:
 365         if ($gb['BANS'][$ip]<=time())
 366         {   // Ban expired, user can try to login again.
 367             logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
 368             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 369             file_put_contents(
 370                 $conf->get('resource.ban_file', 'data/ipbans.php'),
 371                 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 372             );
 373             return true; // Ban has expired, user can login.
 374         }
 375         return false; // User is banned.
 376     }
 377     return true; // User is not banned.
 378 }
 379
 380 // ------------------------------------------------------------------------------------------
 381 // Process login form: Check if login/password is correct.
 382 if (isset($_POST['login']))
 383 {
 384     if (!ban_canLogin($conf)) die(t('I said: NO. You are banned for the moment. Go away.'));
 385     if (isset($_POST['password'])
 386         && $sessionManager->checkToken($_POST['token'])
 387         && (check_auth($_POST['login'], $_POST['password'], $conf))
 388     ) {   // Login/password is OK.
 389         ban_loginOk($conf);
 390         // If user wants to keep the session cookie even after the browser closes:
 391         if (!empty($_POST['longlastingsession']))
 392         {
 393             $_SESSION['longlastingsession'] = 31536000; // (31536000 seconds = 1 year)
 394             $expiration = time() + $_SESSION['longlastingsession']; // calculate relative cookie expiration (1 year from now)
 395             setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, $expiration, WEB_PATH);
 396             $_SESSION['expires_on'] = $expiration;  // Set session expiration on server-side.
 397
 398             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 399             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 400             // Note: Never forget the trailing slash on the cookie path!
 401             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 402         }
 403         else // Standard session expiration (=when browser closes)
 404         {
 405             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 406             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 407             session_regenerate_id(true);
 408         }
 409
 410         // Optional redirect after login:
 411         if (isset($_GET['post'])) {
 412             $uri = '?post='. urlencode($_GET['post']);
 413             foreach (array('description', 'source', 'title', 'tags') as $param) {
 414                 if (!empty($_GET[$param])) {
 415                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 416                 }
 417             }
 418             header('Location: '. $uri);
 419             exit;
 420         }
 421
 422         if (isset($_GET['edit_link'])) {
 423             header('Location: ?edit_link='. escape($_GET['edit_link']));
 424             exit;
 425         }
 426
 427         if (isset($_POST['returnurl'])) {
 428             // Prevent loops over login screen.
 429             if (strpos($_POST['returnurl'], 'do=login') === false) {
 430                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 431                 exit;
 432             }
 433         }
 434         header('Location: ?'); exit;
 435     }
 436     else
 437     {
 438         ban_loginFailed($conf);
 439         $redir = '&username='. $_POST['login'];
 440         if (isset($_GET['post'])) {
 441             $redir .= '&post=' . urlencode($_GET['post']);
 442             foreach (array('description', 'source', 'title', 'tags') as $param) {
 443                 if (!empty($_GET[$param])) {
 444                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 445                 }
 446             }
 447         }
 448         // Redirect to login screen.
 449         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 450         exit;
 451     }
 452 }
 453
 454 // ------------------------------------------------------------------------------------------
 455 // Token management for XSRF protection
 456 // Token should be used in any form which acts on data (create,update,delete,import...).
 457 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 458
 459 /**
 460  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 461  * Gives the last 7 days (which have links).
 462  * This RSS feed cannot be filtered.
 463  *
 464  * @param ConfigManager $conf Configuration Manager instance.
 465  */
 466 function showDailyRSS($conf) {
 467     // Cache system
 468     $query = $_SERVER['QUERY_STRING'];
 469     $cache = new CachedPage(
 470         $conf->get('config.PAGE_CACHE'),
 471         page_url($_SERVER),
 472         startsWith($query,'do=dailyrss') && !isLoggedIn()
 473     );
 474     $cached = $cache->cachedVersion();
 475     if (!empty($cached)) {
 476         echo $cached;
 477         exit;
 478     }
 479
 480     // If cached was not found (or not usable), then read the database and build the response:
 481     // Read links from database (and filter private links if used it not logged in).
 482     $LINKSDB = new LinkDB(
 483         $conf->get('resource.datastore'),
 484         isLoggedIn(),
 485         $conf->get('privacy.hide_public_links'),
 486         $conf->get('redirector.url'),
 487         $conf->get('redirector.encode_url')
 488     );
 489
 490     /* Some Shaarlies may have very few links, so we need to look
 491        back in time until we have enough days ($nb_of_days).
 492     */
 493     $nb_of_days = 7; // We take 7 days.
 494     $today = date('Ymd');
 495     $days = array();
 496
 497     foreach ($LINKSDB as $link) {
 498         $day = $link['created']->format('Ymd'); // Extract day (without time)
 499         if (strcmp($day, $today) < 0) {
 500             if (empty($days[$day])) {
 501                 $days[$day] = array();
 502             }
 503             $days[$day][] = $link;
 504         }
 505
 506         if (count($days) > $nb_of_days) {
 507             break; // Have we collected enough days?
 508         }
 509     }
 510
 511     // Build the RSS feed.
 512     header('Content-Type: application/rss+xml; charset=utf-8');
 513     $pageaddr = escape(index_url($_SERVER));
 514     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 515     echo '<channel>';
 516     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 517     echo '<link>'. $pageaddr .'</link>';
 518     echo '<description>Daily shared links</description>';
 519     echo '<language>en-en</language>';
 520     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 521
 522     // For each day.
 523     foreach ($days as $day => $links) {
 524         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 525         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 526
 527         // We pre-format some fields for proper output.
 528         foreach ($links as &$link) {
 529             $link['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 530             $link['thumbnail'] = thumbnail($conf, $link['url']);
 531             $link['timestamp'] = $link['created']->getTimestamp();
 532             if (startsWith($link['url'], '?')) {
 533                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 534             }
 535         }
 536
 537         // Then build the HTML for this day:
 538         $tpl = new RainTPL;
 539         $tpl->assign('title', $conf->get('general.title'));
 540         $tpl->assign('daydate', $dayDate->getTimestamp());
 541         $tpl->assign('absurl', $absurl);
 542         $tpl->assign('links', $links);
 543         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 544         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 545         $html = $tpl->draw('dailyrss', true);
 546
 547         echo $html . PHP_EOL;
 548     }
 549     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 550
 551     $cache->cache(ob_get_contents());
 552     ob_end_flush();
 553     exit;
 554 }
 555
 556 /**
 557  * Show the 'Daily' page.
 558  *
 559  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 560  * @param LinkDB        $LINKSDB       LinkDB instance.
 561  * @param ConfigManager $conf          Configuration Manager instance.
 562  * @param PluginManager $pluginManager Plugin Manager instane.
 563  */
 564 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 565 {
 566     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 567     if (isset($_GET['day'])) {
 568       $day = $_GET['day'];
 569     }
 570
 571     $days = $LINKSDB->days();
 572     $i = array_search($day, $days);
 573     if ($i === false && count($days)) {
 574         // no links for day, but at least one day with links
 575         $i = count($days) - 1;
 576         $day = $days[$i];
 577     }
 578     $previousday = '';
 579     $nextday = '';
 580
 581     if ($i !== false) {
 582         if ($i >= 1) {
 583              $previousday=$days[$i - 1];
 584         }
 585         if ($i < count($days) - 1) {
 586           $nextday = $days[$i + 1];
 587         }
 588     }
 589     try {
 590         $linksToDisplay = $LINKSDB->filterDay($day);
 591     } catch (Exception $exc) {
 592         error_log($exc);
 593         $linksToDisplay = array();
 594     }
 595
 596     // We pre-format some fields for proper output.
 597     foreach($linksToDisplay as $key => $link) {
 598         $taglist = explode(' ',$link['tags']);
 599         uasort($taglist, 'strcasecmp');
 600         $linksToDisplay[$key]['taglist']=$taglist;
 601         $linksToDisplay[$key]['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 602         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 603         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 604     }
 605
 606     /* We need to spread the articles on 3 columns.
 607        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 608        so I manually spread entries with a simple method: I roughly evaluate the
 609        height of a div according to title and description length.
 610     */
 611     $columns = array(array(), array(), array()); // Entries to display, for each column.
 612     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 613     foreach($linksToDisplay as $key => $link) {
 614         // Roughly estimate length of entry (by counting characters)
 615         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 616         // Description: 836 characters gives roughly 342 pixel height.
 617         // This is not perfect, but it's usually OK.
 618         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 619         if ($link['thumbnail']) {
 620           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 621         }
 622         // Then put in column which is the less filled:
 623         $smallest = min($fill); // find smallest value in array.
 624         $index = array_search($smallest, $fill); // find index of this smallest value.
 625         array_push($columns[$index], $link); // Put entry in this column.
 626         $fill[$index] += $length;
 627     }
 628
 629     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 630     $data = array(
 631         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 632         'linksToDisplay' => $linksToDisplay,
 633         'cols' => $columns,
 634         'day' => $dayDate->getTimestamp(),
 635         'dayDate' => $dayDate,
 636         'previousday' => $previousday,
 637         'nextday' => $nextday,
 638     );
 639
 640     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 641
 642     foreach ($data as $key => $value) {
 643         $pageBuilder->assign($key, $value);
 644     }
 645
 646     $pageBuilder->renderPage('daily');
 647     exit;
 648 }
 649
 650 /**
 651  * Renders the linklist
 652  *
 653  * @param pageBuilder   $PAGE    pageBuilder instance.
 654  * @param LinkDB        $LINKSDB LinkDB instance.
 655  * @param ConfigManager $conf    Configuration Manager instance.
 656  * @param PluginManager $pluginManager Plugin Manager instance.
 657  */
 658 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 659     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 660     $PAGE->renderPage('linklist');
 661 }
 662
 663 /**
 664  * Render HTML page (according to URL parameters and user rights)
 665  *
 666  * @param ConfigManager  $conf           Configuration Manager instance.
 667  * @param PluginManager  $pluginManager  Plugin Manager instance,
 668  * @param LinkDB         $LINKSDB
 669  * @param History        $history        instance
 670  * @param SessionManager $sessionManager SessionManager instance
 671  */
 672 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager)
 673 {
 674     $updater = new Updater(
 675         read_updates_file($conf->get('resource.updates')),
 676         $LINKSDB,
 677         $conf,
 678         isLoggedIn()
 679     );
 680     try {
 681         $newUpdates = $updater->update();
 682         if (! empty($newUpdates)) {
 683             write_updates_file(
 684                 $conf->get('resource.updates'),
 685                 $updater->getDoneUpdates()
 686             );
 687         }
 688     }
 689     catch(Exception $e) {
 690         die($e->getMessage());
 691     }
 692
 693     $PAGE = new PageBuilder($conf, $LINKSDB, $sessionManager->generateToken());
 694     $PAGE->assign('linkcount', count($LINKSDB));
 695     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 696     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 697
 698     // Determine which page will be rendered.
 699     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 700     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 701
 702     if (
 703         // if the user isn't logged in
 704         !isLoggedIn() &&
 705         // and Shaarli doesn't have public content...
 706         $conf->get('privacy.hide_public_links') &&
 707         // and is configured to enforce the login
 708         $conf->get('privacy.force_login') &&
 709         // and the current page isn't already the login page
 710         $targetPage !== Router::$PAGE_LOGIN &&
 711         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 712         $targetPage !== Router::$PAGE_FEED_ATOM &&
 713         $targetPage !== Router::$PAGE_FEED_RSS
 714     ) {
 715         // force current page to be the login page
 716         $targetPage = Router::$PAGE_LOGIN;
 717     }
 718
 719     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 720     // Then assign generated data to RainTPL.
 721     $common_hooks = array(
 722         'includes',
 723         'header',
 724         'footer',
 725     );
 726
 727     foreach($common_hooks as $name) {
 728         $plugin_data = array();
 729         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 730             array(
 731                 'target' => $targetPage,
 732                 'loggedin' => isLoggedIn()
 733             )
 734         );
 735         $PAGE->assign('plugins_' . $name, $plugin_data);
 736     }
 737
 738     // -------- Display login form.
 739     if ($targetPage == Router::$PAGE_LOGIN)
 740     {
 741         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 742         if (isset($_GET['username'])) {
 743             $PAGE->assign('username', escape($_GET['username']));
 744         }
 745         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 746         // add default state of the 'remember me' checkbox
 747         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 748         $PAGE->renderPage('loginform');
 749         exit;
 750     }
 751     // -------- User wants to logout.
 752     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 753     {
 754         invalidateCaches($conf->get('resource.page_cache'));
 755         logout();
 756         header('Location: ?');
 757         exit;
 758     }
 759
 760     // -------- Picture wall
 761     if ($targetPage == Router::$PAGE_PICWALL)
 762     {
 763         // Optionally filter the results:
 764         $links = $LINKSDB->filterSearch($_GET);
 765         $linksToDisplay = array();
 766
 767         // Get only links which have a thumbnail.
 768         foreach($links as $link)
 769         {
 770             $permalink='?'.$link['shorturl'];
 771             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 772             if ($thumb!='') // Only output links which have a thumbnail.
 773             {
 774                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 775                 $linksToDisplay[]=$link; // Add to array.
 776             }
 777         }
 778
 779         $data = array(
 780             'linksToDisplay' => $linksToDisplay,
 781         );
 782         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 783
 784         foreach ($data as $key => $value) {
 785             $PAGE->assign($key, $value);
 786         }
 787
 788         $PAGE->renderPage('picwall');
 789         exit;
 790     }
 791
 792     // -------- Tag cloud
 793     if ($targetPage == Router::$PAGE_TAGCLOUD)
 794     {
 795         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 796         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 797         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 798
 799         // We sort tags alphabetically, then choose a font size according to count.
 800         // First, find max value.
 801         $maxcount = 0;
 802         foreach ($tags as $value) {
 803             $maxcount = max($maxcount, $value);
 804         }
 805
 806         alphabetical_sort($tags, false, true);
 807
 808         $tagList = array();
 809         foreach($tags as $key => $value) {
 810             if (in_array($key, $filteringTags)) {
 811                 continue;
 812             }
 813             // Tag font size scaling:
 814             //   default 15 and 30 logarithm bases affect scaling,
 815             //   22 and 6 are arbitrary font sizes for max and min sizes.
 816             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 817             $tagList[$key] = array(
 818                 'count' => $value,
 819                 'size' => number_format($size, 2, '.', ''),
 820             );
 821         }
 822
 823         $data = array(
 824             'search_tags' => implode(' ', escape($filteringTags)),
 825             'tags' => $tagList,
 826         );
 827         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 828
 829         foreach ($data as $key => $value) {
 830             $PAGE->assign($key, $value);
 831         }
 832
 833         $PAGE->renderPage('tag.cloud');
 834         exit;
 835     }
 836
 837     // -------- Tag list
 838     if ($targetPage == Router::$PAGE_TAGLIST)
 839     {
 840         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 841         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 842         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 843         foreach ($filteringTags as $tag) {
 844             if (array_key_exists($tag, $tags)) {
 845                 unset($tags[$tag]);
 846             }
 847         }
 848
 849         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 850             alphabetical_sort($tags, false, true);
 851         }
 852
 853         $data = [
 854             'search_tags' => implode(' ', escape($filteringTags)),
 855             'tags' => $tags,
 856         ];
 857         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 858
 859         foreach ($data as $key => $value) {
 860             $PAGE->assign($key, $value);
 861         }
 862
 863         $PAGE->renderPage('tag.list');
 864         exit;
 865     }
 866
 867     // Daily page.
 868     if ($targetPage == Router::$PAGE_DAILY) {
 869         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 870     }
 871
 872     // ATOM and RSS feed.
 873     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 874         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 875         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 876
 877         // Cache system
 878         $query = $_SERVER['QUERY_STRING'];
 879         $cache = new CachedPage(
 880             $conf->get('resource.page_cache'),
 881             page_url($_SERVER),
 882             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 883         );
 884         $cached = $cache->cachedVersion();
 885         if (!empty($cached)) {
 886             echo $cached;
 887             exit;
 888         }
 889
 890         // Generate data.
 891         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 892         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 893         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 894         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 895         $data = $feedGenerator->buildData();
 896
 897         // Process plugin hook.
 898         $pluginManager->executeHooks('render_feed', $data, array(
 899             'loggedin' => isLoggedIn(),
 900             'target' => $targetPage,
 901         ));
 902
 903         // Render the template.
 904         $PAGE->assignAll($data);
 905         $PAGE->renderPage('feed.'. $feedType);
 906         $cache->cache(ob_get_contents());
 907         ob_end_flush();
 908         exit;
 909     }
 910
 911     // Display opensearch plugin (XML)
 912     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 913         header('Content-Type: application/xml; charset=utf-8');
 914         $PAGE->assign('serverurl', index_url($_SERVER));
 915         $PAGE->renderPage('opensearch');
 916         exit;
 917     }
 918
 919     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 920     if (isset($_GET['addtag']))
 921     {
 922         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 923         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 924         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 925
 926         // Prevent redirection loop
 927         if (isset($params['addtag'])) {
 928             unset($params['addtag']);
 929         }
 930
 931         // Check if this tag is already in the search query and ignore it if it is.
 932         // Each tag is always separated by a space
 933         if (isset($params['searchtags'])) {
 934             $current_tags = explode(' ', $params['searchtags']);
 935         } else {
 936             $current_tags = array();
 937         }
 938         $addtag = true;
 939         foreach ($current_tags as $value) {
 940             if ($value === $_GET['addtag']) {
 941                 $addtag = false;
 942                 break;
 943             }
 944         }
 945         // Append the tag if necessary
 946         if (empty($params['searchtags'])) {
 947             $params['searchtags'] = trim($_GET['addtag']);
 948         }
 949         else if ($addtag) {
 950             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 951         }
 952
 953         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 954         header('Location: ?'.http_build_query($params));
 955         exit;
 956     }
 957
 958     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 959     if (isset($_GET['removetag'])) {
 960         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 961         if (empty($_SERVER['HTTP_REFERER'])) {
 962             header('Location: ?');
 963             exit;
 964         }
 965
 966         // In case browser does not send HTTP_REFERER
 967         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 968
 969         // Prevent redirection loop
 970         if (isset($params['removetag'])) {
 971             unset($params['removetag']);
 972         }
 973
 974         if (isset($params['searchtags'])) {
 975             $tags = explode(' ', $params['searchtags']);
 976             // Remove value from array $tags.
 977             $tags = array_diff($tags, array($_GET['removetag']));
 978             $params['searchtags'] = implode(' ',$tags);
 979
 980             if (empty($params['searchtags'])) {
 981                 unset($params['searchtags']);
 982             }
 983
 984             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 985         }
 986         header('Location: ?'.http_build_query($params));
 987         exit;
 988     }
 989
 990     // -------- User wants to change the number of links per page (linksperpage=...)
 991     if (isset($_GET['linksperpage'])) {
 992         if (is_numeric($_GET['linksperpage'])) {
 993             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 994         }
 995
 996         if (! empty($_SERVER['HTTP_REFERER'])) {
 997             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 998         } else {
 999             $location = '?';
1000         }
1001         header('Location: '. $location);
1002         exit;
1003     }
1004
1005     // -------- User wants to see only private links (toggle)
1006     if (isset($_GET['privateonly'])) {
1007         if (empty($_SESSION['privateonly'])) {
1008             $_SESSION['privateonly'] = 1; // See only private links
1009         } else {
1010             unset($_SESSION['privateonly']); // See all links
1011         }
1012
1013         if (! empty($_SERVER['HTTP_REFERER'])) {
1014             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly'));
1015         } else {
1016             $location = '?';
1017         }
1018         header('Location: '. $location);
1019         exit;
1020     }
1021
1022     // -------- User wants to see only untagged links (toggle)
1023     if (isset($_GET['untaggedonly'])) {
1024         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
1025
1026         if (! empty($_SERVER['HTTP_REFERER'])) {
1027             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
1028         } else {
1029             $location = '?';
1030         }
1031         header('Location: '. $location);
1032         exit;
1033     }
1034
1035     // -------- Handle other actions allowed for non-logged in users:
1036     if (!isLoggedIn())
1037     {
1038         // User tries to post new link but is not logged in:
1039         // Show login screen, then redirect to ?post=...
1040         if (isset($_GET['post']))
1041         {
1042             header( // Redirect to login page, then back to post link.
1043                 'Location: ?do=login&post='.urlencode($_GET['post']).
1044                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1045                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1046                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1047                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1048             );
1049             exit;
1050         }
1051
1052         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1053         if (isset($_GET['edit_link'])) {
1054             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1055             exit;
1056         }
1057
1058         exit; // Never remove this one! All operations below are reserved for logged in user.
1059     }
1060
1061     // -------- All other functions are reserved for the registered user:
1062
1063     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1064     if ($targetPage == Router::$PAGE_TOOLS)
1065     {
1066         $data = [
1067             'pageabsaddr' => index_url($_SERVER),
1068             'sslenabled' => is_https($_SERVER),
1069         ];
1070         $pluginManager->executeHooks('render_tools', $data);
1071
1072         foreach ($data as $key => $value) {
1073             $PAGE->assign($key, $value);
1074         }
1075
1076         $PAGE->renderPage('tools');
1077         exit;
1078     }
1079
1080     // -------- User wants to change his/her password.
1081     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1082     {
1083         if ($conf->get('security.open_shaarli')) {
1084             die(t('You are not supposed to change a password on an Open Shaarli.'));
1085         }
1086
1087         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1088         {
1089             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
1090
1091             // Make sure old password is correct.
1092             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1093             if ($oldhash!= $conf->get('credentials.hash')) {
1094                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1095                 exit;
1096             }
1097             // Save new password
1098             // Salt renders rainbow-tables attacks useless.
1099             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1100             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1101             try {
1102                 $conf->write(isLoggedIn());
1103             }
1104             catch(Exception $e) {
1105                 error_log(
1106                     'ERROR while writing config file after changing password.' . PHP_EOL .
1107                     $e->getMessage()
1108                 );
1109
1110                 // TODO: do not handle exceptions/errors in JS.
1111                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1112                 exit;
1113             }
1114             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1115             exit;
1116         }
1117         else // show the change password form.
1118         {
1119             $PAGE->renderPage('changepassword');
1120             exit;
1121         }
1122     }
1123
1124     // -------- User wants to change configuration
1125     if ($targetPage == Router::$PAGE_CONFIGURE)
1126     {
1127         if (!empty($_POST['title']) )
1128         {
1129             if (!$sessionManager->checkToken($_POST['token'])) {
1130                 die(t('Wrong token.')); // Go away!
1131             }
1132             $tz = 'UTC';
1133             if (!empty($_POST['continent']) && !empty($_POST['city'])
1134                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1135             ) {
1136                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1137             }
1138             $conf->set('general.timezone', $tz);
1139             $conf->set('general.title', escape($_POST['title']));
1140             $conf->set('general.header_link', escape($_POST['titleLink']));
1141             $conf->set('resource.theme', escape($_POST['theme']));
1142             $conf->set('redirector.url', escape($_POST['redirector']));
1143             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1144             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1145             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1146             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1147             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1148             $conf->set('api.enabled', !empty($_POST['enableApi']));
1149             $conf->set('api.secret', escape($_POST['apiSecret']));
1150             $conf->set('translation.language', escape($_POST['language']));
1151
1152             try {
1153                 $conf->write(isLoggedIn());
1154                 $history->updateSettings();
1155                 invalidateCaches($conf->get('resource.page_cache'));
1156             }
1157             catch(Exception $e) {
1158                 error_log(
1159                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1160                     $e->getMessage()
1161                 );
1162
1163                 // TODO: do not handle exceptions/errors in JS.
1164                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1165                 exit;
1166             }
1167             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1168             exit;
1169         }
1170         else // Show the configuration form.
1171         {
1172             $PAGE->assign('title', $conf->get('general.title'));
1173             $PAGE->assign('theme', $conf->get('resource.theme'));
1174             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1175             $PAGE->assign('redirector', $conf->get('redirector.url'));
1176             list($continents, $cities) = generateTimeZoneData(
1177                 timezone_identifiers_list(),
1178                 $conf->get('general.timezone')
1179             );
1180             $PAGE->assign('continents', $continents);
1181             $PAGE->assign('cities', $cities);
1182             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1183             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1184             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1185             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1186             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1187             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1188             $PAGE->assign('api_secret', $conf->get('api.secret'));
1189             $PAGE->assign('languages', Languages::getAvailableLanguages());
1190             $PAGE->assign('language', $conf->get('translation.language'));
1191             $PAGE->renderPage('configure');
1192             exit;
1193         }
1194     }
1195
1196     // -------- User wants to rename a tag or delete it
1197     if ($targetPage == Router::$PAGE_CHANGETAG)
1198     {
1199         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1200             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1201             $PAGE->renderPage('changetag');
1202             exit;
1203         }
1204
1205         if (!$sessionManager->checkToken($_POST['token'])) {
1206             die(t('Wrong token.'));
1207         }
1208
1209         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1210         $LINKSDB->save($conf->get('resource.page_cache'));
1211         foreach ($alteredLinks as $link) {
1212             $history->updateLink($link);
1213         }
1214         $delete = empty($_POST['totag']);
1215         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1216         $count = count($alteredLinks);
1217         $alert = $delete
1218             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1219             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1220         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1221         exit;
1222     }
1223
1224     // -------- User wants to add a link without using the bookmarklet: Show form.
1225     if ($targetPage == Router::$PAGE_ADDLINK)
1226     {
1227         $PAGE->renderPage('addlink');
1228         exit;
1229     }
1230
1231     // -------- User clicked the "Save" button when editing a link: Save link to database.
1232     if (isset($_POST['save_edit']))
1233     {
1234         // Go away!
1235         if (! $sessionManager->checkToken($_POST['token'])) {
1236             die(t('Wrong token.'));
1237         }
1238
1239         // lf_id should only be present if the link exists.
1240         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1241         // Linkdate is kept here to:
1242         //   - use the same permalink for notes as they're displayed when creating them
1243         //   - let users hack creation date of their posts
1244         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1245         $linkdate = escape($_POST['lf_linkdate']);
1246         if (isset($LINKSDB[$id])) {
1247             // Edit
1248             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1249             $updated = new DateTime();
1250             $shortUrl = $LINKSDB[$id]['shorturl'];
1251             $new = false;
1252         } else {
1253             // New link
1254             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1255             $updated = null;
1256             $shortUrl = link_small_hash($created, $id);
1257             $new = true;
1258         }
1259
1260         // Remove multiple spaces.
1261         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1262         // Remove first '-' char in tags.
1263         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1264         // Remove duplicates.
1265         $tags = implode(' ', array_unique(explode(' ', $tags)));
1266
1267         if (empty(trim($_POST['lf_url']))) {
1268             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1269         }
1270         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1271
1272         $link = array(
1273             'id' => $id,
1274             'title' => trim($_POST['lf_title']),
1275             'url' => $url,
1276             'description' => $_POST['lf_description'],
1277             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1278             'created' => $created,
1279             'updated' => $updated,
1280             'tags' => str_replace(',', ' ', $tags),
1281             'shorturl' => $shortUrl,
1282         );
1283
1284         // If title is empty, use the URL as title.
1285         if ($link['title'] == '') {
1286             $link['title'] = $link['url'];
1287         }
1288
1289         $pluginManager->executeHooks('save_link', $link);
1290
1291         $LINKSDB[$id] = $link;
1292         $LINKSDB->save($conf->get('resource.page_cache'));
1293         if ($new) {
1294             $history->addLink($link);
1295         } else {
1296             $history->updateLink($link);
1297         }
1298
1299         // If we are called from the bookmarklet, we must close the popup:
1300         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1301             echo '<script>self.close();</script>';
1302             exit;
1303         }
1304
1305         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1306         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1307         // Scroll to the link which has been edited.
1308         $location .= '#' . $link['shorturl'];
1309         // After saving the link, redirect to the page the user was on.
1310         header('Location: '. $location);
1311         exit;
1312     }
1313
1314     // -------- User clicked the "Cancel" button when editing a link.
1315     if (isset($_POST['cancel_edit']))
1316     {
1317         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1318         if (! isset($LINKSDB[$id])) {
1319             header('Location: ?');
1320         }
1321         // If we are called from the bookmarklet, we must close the popup:
1322         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1323         $link = $LINKSDB[$id];
1324         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1325         // Scroll to the link which has been edited.
1326         $returnurl .= '#'. $link['shorturl'];
1327         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1328         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1329         exit;
1330     }
1331
1332     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1333     if ($targetPage == Router::$PAGE_DELETELINK)
1334     {
1335         if (! $sessionManager->checkToken($_GET['token'])) {
1336             die(t('Wrong token.'));
1337         }
1338
1339         $ids = trim($_GET['lf_linkdate']);
1340         if (strpos($ids, ' ') !== false) {
1341             // multiple, space-separated ids provided
1342             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1343         } else {
1344             // only a single id provided
1345             $ids = [$ids];
1346         }
1347         // assert at least one id is given
1348         if(!count($ids)){
1349             die('no id provided');
1350         }
1351         foreach ($ids as $id) {
1352             $id = (int) escape($id);
1353             $link = $LINKSDB[$id];
1354             $pluginManager->executeHooks('delete_link', $link);
1355             unset($LINKSDB[$id]);
1356         }
1357         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1358         $history->deleteLink($link);
1359
1360         // If we are called from the bookmarklet, we must close the popup:
1361         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1362
1363         $location = '?';
1364         if (isset($_SERVER['HTTP_REFERER'])) {
1365             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1366             $location = generateLocation(
1367                     $_SERVER['HTTP_REFERER'],
1368                     $_SERVER['HTTP_HOST'],
1369                     ['delete_link', 'edit_link', $link['shorturl']]
1370             );
1371         }
1372
1373         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1374         exit;
1375     }
1376
1377     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1378     if (isset($_GET['edit_link']))
1379     {
1380         $id = (int) escape($_GET['edit_link']);
1381         $link = $LINKSDB[$id];  // Read database
1382         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1383         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1384         $data = array(
1385             'link' => $link,
1386             'link_is_new' => false,
1387             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1388             'tags' => $LINKSDB->linksCountPerTag(),
1389         );
1390         $pluginManager->executeHooks('render_editlink', $data);
1391
1392         foreach ($data as $key => $value) {
1393             $PAGE->assign($key, $value);
1394         }
1395
1396         $PAGE->renderPage('editlink');
1397         exit;
1398     }
1399
1400     // -------- User want to post a new link: Display link edit form.
1401     if (isset($_GET['post'])) {
1402         $url = cleanup_url($_GET['post']);
1403
1404         $link_is_new = false;
1405         // Check if URL is not already in database (in this case, we will edit the existing link)
1406         $link = $LINKSDB->getLinkFromUrl($url);
1407         if (! $link)
1408         {
1409             $link_is_new = true;
1410             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1411             // Get title if it was provided in URL (by the bookmarklet).
1412             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1413             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1414             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1415             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1416             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1417             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1418             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1419                 // Short timeout to keep the application responsive
1420                 list($headers, $content) = get_http_response($url, 4);
1421                 if (strpos($headers[0], '200 OK') !== false) {
1422                     // Retrieve charset.
1423                     $charset = get_charset($headers, $content);
1424                     // Extract title.
1425                     $title = html_extract_title($content);
1426                     // Re-encode title in utf-8 if necessary.
1427                     if (! empty($title) && strtolower($charset) != 'utf-8') {
1428                         $title = mb_convert_encoding($title, 'utf-8', $charset);
1429                     }
1430                 }
1431             }
1432
1433             if ($url == '') {
1434                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1435                 $title = $conf->get('general.default_note_title', t('Note: '));
1436             }
1437             $url = escape($url);
1438             $title = escape($title);
1439
1440             $link = array(
1441                 'linkdate' => $linkdate,
1442                 'title' => $title,
1443                 'url' => $url,
1444                 'description' => $description,
1445                 'tags' => $tags,
1446                 'private' => $private,
1447             );
1448         } else {
1449             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1450         }
1451
1452         $data = array(
1453             'link' => $link,
1454             'link_is_new' => $link_is_new,
1455             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1456             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1457             'tags' => $LINKSDB->linksCountPerTag(),
1458             'default_private_links' => $conf->get('privacy.default_private_links', false),
1459         );
1460         $pluginManager->executeHooks('render_editlink', $data);
1461
1462         foreach ($data as $key => $value) {
1463             $PAGE->assign($key, $value);
1464         }
1465
1466         $PAGE->renderPage('editlink');
1467         exit;
1468     }
1469
1470     if ($targetPage == Router::$PAGE_EXPORT) {
1471         // Export links as a Netscape Bookmarks file
1472
1473         if (empty($_GET['selection'])) {
1474             $PAGE->renderPage('export');
1475             exit;
1476         }
1477
1478         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1479         $selection = $_GET['selection'];
1480         if (isset($_GET['prepend_note_url'])) {
1481             $prependNoteUrl = $_GET['prepend_note_url'];
1482         } else {
1483             $prependNoteUrl = false;
1484         }
1485
1486         try {
1487             $PAGE->assign(
1488                 'links',
1489                 NetscapeBookmarkUtils::filterAndFormat(
1490                     $LINKSDB,
1491                     $selection,
1492                     $prependNoteUrl,
1493                     index_url($_SERVER)
1494                 )
1495             );
1496         } catch (Exception $exc) {
1497             header('Content-Type: text/plain; charset=utf-8');
1498             echo $exc->getMessage();
1499             exit;
1500         }
1501         $now = new DateTime();
1502         header('Content-Type: text/html; charset=utf-8');
1503         header(
1504             'Content-disposition: attachment; filename=bookmarks_'
1505            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1506         );
1507         $PAGE->assign('date', $now->format(DateTime::RFC822));
1508         $PAGE->assign('eol', PHP_EOL);
1509         $PAGE->assign('selection', $selection);
1510         $PAGE->renderPage('export.bookmarks');
1511         exit;
1512     }
1513
1514     if ($targetPage == Router::$PAGE_IMPORT) {
1515         // Upload a Netscape bookmark dump to import its contents
1516
1517         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1518             // Show import dialog
1519             $PAGE->assign(
1520                 'maxfilesize',
1521                 get_max_upload_size(
1522                     ini_get('post_max_size'),
1523                     ini_get('upload_max_filesize'),
1524                     false
1525                 )
1526             );
1527             $PAGE->assign(
1528                 'maxfilesizeHuman',
1529                 get_max_upload_size(
1530                     ini_get('post_max_size'),
1531                     ini_get('upload_max_filesize'),
1532                     true
1533                 )
1534             );
1535             $PAGE->renderPage('import');
1536             exit;
1537         }
1538
1539         // Import bookmarks from an uploaded file
1540         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1541             // The file is too big or some form field may be missing.
1542             $msg = sprintf(
1543                 t(
1544                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1545                     .' (%s). Please upload in smaller chunks.'
1546                 ),
1547                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1548             );
1549             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1550             exit;
1551         }
1552         if (! $sessionManager->checkToken($_POST['token'])) {
1553             die('Wrong token.');
1554         }
1555         $status = NetscapeBookmarkUtils::import(
1556             $_POST,
1557             $_FILES,
1558             $LINKSDB,
1559             $conf,
1560             $history
1561         );
1562         echo '<script>alert("'.$status.'");document.location=\'?do='
1563              .Router::$PAGE_IMPORT .'\';</script>';
1564         exit;
1565     }
1566
1567     // Plugin administration page
1568     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1569         $pluginMeta = $pluginManager->getPluginsMeta();
1570
1571         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1572         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1573         // Load parameters.
1574         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1575         uasort(
1576             $enabledPlugins,
1577             function($a, $b) { return $a['order'] - $b['order']; }
1578         );
1579         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1580
1581         $PAGE->assign('enabledPlugins', $enabledPlugins);
1582         $PAGE->assign('disabledPlugins', $disabledPlugins);
1583         $PAGE->renderPage('pluginsadmin');
1584         exit;
1585     }
1586
1587     // Plugin administration form action
1588     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1589         try {
1590             if (isset($_POST['parameters_form'])) {
1591                 unset($_POST['parameters_form']);
1592                 foreach ($_POST as $param => $value) {
1593                     $conf->set('plugins.'. $param, escape($value));
1594                 }
1595             }
1596             else {
1597                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1598             }
1599             $conf->write(isLoggedIn());
1600             $history->updateSettings();
1601         }
1602         catch (Exception $e) {
1603             error_log(
1604                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1605                 $e->getMessage()
1606             );
1607
1608             // TODO: do not handle exceptions/errors in JS.
1609             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1610             exit;
1611         }
1612         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1613         exit;
1614     }
1615
1616     // Get a fresh token
1617     if ($targetPage == Router::$GET_TOKEN) {
1618         header('Content-Type:text/plain');
1619         echo $sessionManager->generateToken($conf);
1620         exit;
1621     }
1622
1623     // -------- Otherwise, simply display search form and links:
1624     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1625     exit;
1626 }
1627
1628 /**
1629  * Template for the list of links (<div id="linklist">)
1630  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1631  *
1632  * @param pageBuilder   $PAGE          pageBuilder instance.
1633  * @param LinkDB        $LINKSDB       LinkDB instance.
1634  * @param ConfigManager $conf          Configuration Manager instance.
1635  * @param PluginManager $pluginManager Plugin Manager instance.
1636  */
1637 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1638 {
1639     // Used in templates
1640     if (isset($_GET['searchtags'])) {
1641         if (! empty($_GET['searchtags'])) {
1642             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1643         } else {
1644             $searchtags = false;
1645         }
1646     } else {
1647         $searchtags = '';
1648     }
1649     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1650
1651     // Smallhash filter
1652     if (! empty($_SERVER['QUERY_STRING'])
1653         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1654         try {
1655             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1656         } catch (LinkNotFoundException $e) {
1657             $PAGE->render404($e->getMessage());
1658             exit;
1659         }
1660     } else {
1661         // Filter links according search parameters.
1662         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
1663         $request = [
1664             'searchtags' => $searchtags,
1665             'searchterm' => $searchterm,
1666         ];
1667         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1668     }
1669
1670     // ---- Handle paging.
1671     $keys = array();
1672     foreach ($linksToDisplay as $key => $value) {
1673         $keys[] = $key;
1674     }
1675
1676
1677
1678     // Select articles according to paging.
1679     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1680     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1681     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1682     $page = $page < 1 ? 1 : $page;
1683     $page = $page > $pagecount ? $pagecount : $page;
1684     // Start index.
1685     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1686     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1687     $linkDisp = array();
1688     while ($i<$end && $i<count($keys))
1689     {
1690         $link = $linksToDisplay[$keys[$i]];
1691         $link['description'] = format_description($link['description'], $conf->get('redirector.url'));
1692         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1693         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1694         $link['timestamp'] = $link['created']->getTimestamp();
1695         if (! empty($link['updated'])) {
1696             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1697         } else {
1698             $link['updated_timestamp'] = '';
1699         }
1700         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1701         uasort($taglist, 'strcasecmp');
1702         $link['taglist'] = $taglist;
1703         // Check for both signs of a note: starting with ? and 7 chars long.
1704         if ($link['url'][0] === '?' &&
1705             strlen($link['url']) === 7) {
1706             $link['url'] = index_url($_SERVER) . $link['url'];
1707         }
1708
1709         $linkDisp[$keys[$i]] = $link;
1710         $i++;
1711     }
1712
1713     // Compute paging navigation
1714     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1715     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1716     $previous_page_url = '';
1717     if ($i != count($keys)) {
1718         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1719     }
1720     $next_page_url='';
1721     if ($page>1) {
1722         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1723     }
1724
1725     // Fill all template fields.
1726     $data = array(
1727         'previous_page_url' => $previous_page_url,
1728         'next_page_url' => $next_page_url,
1729         'page_current' => $page,
1730         'page_max' => $pagecount,
1731         'result_count' => count($linksToDisplay),
1732         'search_term' => $searchterm,
1733         'search_tags' => $searchtags,
1734         'visibility' => ! empty($_SESSION['privateonly']) ? 'private' : '',
1735         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1736         'links' => $linkDisp,
1737     );
1738
1739     // If there is only a single link, we change on-the-fly the title of the page.
1740     if (count($linksToDisplay) == 1) {
1741         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1742     }
1743
1744     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1745
1746     foreach ($data as $key => $value) {
1747         $PAGE->assign($key, $value);
1748     }
1749
1750     return;
1751 }
1752
1753 /**
1754  * Compute the thumbnail for a link.
1755  *
1756  * With a link to the original URL.
1757  * Understands various services (youtube.com...)
1758  * Input: $url = URL for which the thumbnail must be found.
1759  *        $href = if provided, this URL will be followed instead of $url
1760  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1761  * Some of them may be missing.
1762  * Return an empty array if no thumbnail available.
1763  *
1764  * @param ConfigManager $conf Configuration Manager instance.
1765  * @param string        $url
1766  * @param string|bool   $href
1767  *
1768  * @return array
1769  */
1770 function computeThumbnail($conf, $url, $href = false)
1771 {
1772     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1773     if ($href==false) $href=$url;
1774
1775     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1776     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1777     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1778     $domain = parse_url($url,PHP_URL_HOST);
1779     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1780     {
1781         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1782         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1783                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1784     }
1785     if ($domain=='youtu.be') // Youtube short links
1786     {
1787         $path = parse_url($url,PHP_URL_PATH);
1788         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1789                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1790     }
1791     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1792     {
1793         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1794         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1795                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1796     }
1797
1798     if ($domain=='imgur.com')
1799     {
1800         $path = parse_url($url,PHP_URL_PATH);
1801         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1802         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1803                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1804         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1805                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1806
1807         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1808                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1809     }
1810     if ($domain=='i.imgur.com')
1811     {
1812         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1813         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1814                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1815     }
1816     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1817     {
1818         if (strpos($url,'dailymotion.com/video/')!==false)
1819         {
1820             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1821             return array('src'=>$thumburl,
1822                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1823         }
1824     }
1825     if (endsWith($domain,'.imageshack.us'))
1826     {
1827         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1828         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1829         {
1830             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1831             return array('src'=>$thumburl,
1832                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1833         }
1834     }
1835
1836     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1837     // So we deport the thumbnail generation in order not to slow down page generation
1838     // (and we also cache the thumbnail)
1839
1840     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1841
1842     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1843         || $domain=='vimeo.com'
1844         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1845         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1846     )
1847     {
1848         if ($domain=='vimeo.com')
1849         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1850             $path = parse_url($url,PHP_URL_PATH);
1851             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1852         }
1853         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1854         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1855             $path = parse_url($url,PHP_URL_PATH);
1856             if (!preg_match('!/\d+.+?!',$path)) return array();
1857         }
1858         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1859         {   // Make sure this TED URL points to a video (/talks/...)
1860             $path = parse_url($url,PHP_URL_PATH);
1861             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1862         }
1863         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1864         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1865                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1866     }
1867
1868     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1869     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1870     // But using the extension will do.
1871     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1872     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1873     {
1874         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1875         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1876                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1877     }
1878     return array(); // No thumbnail.
1879
1880 }
1881
1882
1883 // Returns the HTML code to display a thumbnail for a link
1884 // with a link to the original URL.
1885 // Understands various services (youtube.com...)
1886 // Input: $url = URL for which the thumbnail must be found.
1887 //        $href = if provided, this URL will be followed instead of $url
1888 // Returns '' if no thumbnail available.
1889 function thumbnail($url,$href=false)
1890 {
1891     // FIXME!
1892     global $conf;
1893     $t = computeThumbnail($conf, $url,$href);
1894     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1895
1896     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1897     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1898     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1899     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1900     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1901     $html.='></a>';
1902     return $html;
1903 }
1904
1905 // Returns the HTML code to display a thumbnail for a link
1906 // for the picture wall (using lazy image loading)
1907 // Understands various services (youtube.com...)
1908 // Input: $url = URL for which the thumbnail must be found.
1909 //        $href = if provided, this URL will be followed instead of $url
1910 // Returns '' if no thumbnail available.
1911 function lazyThumbnail($conf, $url,$href=false)
1912 {
1913     // FIXME!
1914     global $conf;
1915     $t = computeThumbnail($conf, $url,$href);
1916     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1917
1918     $html='<a href="'.escape($t['href']).'">';
1919
1920     // Lazy image
1921     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1922
1923     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1924     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1925     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1926     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1927     $html.='>';
1928
1929     // No-JavaScript fallback.
1930     $html.='<noscript><img src="'.escape($t['src']).'"';
1931     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1932     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1933     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1934     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1935     $html.='></noscript></a>';
1936
1937     return $html;
1938 }
1939
1940
1941 /**
1942  * Installation
1943  * This function should NEVER be called if the file data/config.php exists.
1944  *
1945  * @param ConfigManager  $conf           Configuration Manager instance.
1946  * @param SessionManager $sessionManager SessionManager instance
1947  */
1948 function install($conf, $sessionManager) {
1949     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1950     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1951
1952
1953     // This part makes sure sessions works correctly.
1954     // (Because on some hosts, session.save_path may not be set correctly,
1955     // or we may not have write access to it.)
1956     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1957     {
1958         // Step 2: Check if data in session is correct.
1959         $msg = t(
1960             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1961             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1962             'and that you have write access to it.<br>'.
1963             'It currently points to %s.<br>'.
1964             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1965             'or any custom hostname without a dot causes cookie storage to fail. '.
1966             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1967         );
1968         $msg = sprintf($msg, session_save_path());
1969         echo $msg;
1970         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1971         die;
1972     }
1973     if (!isset($_SESSION['session_tested']))
1974     {   // Step 1 : Try to store data in session and reload page.
1975         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1976         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1977     }
1978     if (isset($_GET['test_session']))
1979     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1980         header('Location: '.index_url($_SERVER));
1981     }
1982
1983
1984     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1985     {
1986         $tz = 'UTC';
1987         if (!empty($_POST['continent']) && !empty($_POST['city'])
1988             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1989         ) {
1990             $tz = $_POST['continent'].'/'.$_POST['city'];
1991         }
1992         $conf->set('general.timezone', $tz);
1993         $login = $_POST['setlogin'];
1994         $conf->set('credentials.login', $login);
1995         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1996         $conf->set('credentials.salt', $salt);
1997         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1998         if (!empty($_POST['title'])) {
1999             $conf->set('general.title', escape($_POST['title']));
2000         } else {
2001             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
2002         }
2003         $conf->set('translation.language', escape($_POST['language']));
2004         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
2005         $conf->set('api.enabled', !empty($_POST['enableApi']));
2006         $conf->set(
2007             'api.secret',
2008             generate_api_secret(
2009                 $conf->get('credentials.login'),
2010                 $conf->get('credentials.salt')
2011             )
2012         );
2013         try {
2014             // Everything is ok, let's create config file.
2015             $conf->write(isLoggedIn());
2016         }
2017         catch(Exception $e) {
2018             error_log(
2019                     'ERROR while writing config file after installation.' . PHP_EOL .
2020                     $e->getMessage()
2021                 );
2022
2023             // TODO: do not handle exceptions/errors in JS.
2024             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2025             exit;
2026         }
2027         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2028         exit;
2029     }
2030
2031     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
2032     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2033     $PAGE->assign('continents', $continents);
2034     $PAGE->assign('cities', $cities);
2035     $PAGE->assign('languages', Languages::getAvailableLanguages());
2036     $PAGE->renderPage('install');
2037     exit;
2038 }
2039
2040 /**
2041  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2042  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2043  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2044  * This function is called by passing the URL:
2045  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2046  * [URL] is the URL of the link (e.g. a flickr page)
2047  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2048  * The function below will fetch the image from the webservice and store it in the cache.
2049  *
2050  * @param ConfigManager $conf Configuration Manager instance,
2051  */
2052 function genThumbnail($conf)
2053 {
2054     // Make sure the parameters in the URL were generated by us.
2055     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2056     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2057
2058     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2059     // Let's see if we don't already have the image for this URL in the cache.
2060     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2061     if (is_file($cacheDir .'/'. $thumbname))
2062     {   // We have the thumbnail, just serve it:
2063         header('Content-Type: image/jpeg');
2064         echo file_get_contents($cacheDir .'/'. $thumbname);
2065         return;
2066     }
2067     // We may also serve a blank image (if service did not respond)
2068     $blankname=hash('sha1',$_GET['url']).'.gif';
2069     if (is_file($cacheDir .'/'. $blankname))
2070     {
2071         header('Content-Type: image/gif');
2072         echo file_get_contents($cacheDir .'/'. $blankname);
2073         return;
2074     }
2075
2076     // Otherwise, generate the thumbnail.
2077     $url = $_GET['url'];
2078     $domain = parse_url($url,PHP_URL_HOST);
2079
2080     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2081     {
2082         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2083         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2084
2085         // Is this a link to an image, or to a flickr page ?
2086         $imageurl='';
2087         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2088         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2089             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2090             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2091         }
2092         else // This is a flickr page (html)
2093         {
2094             // Get the flickr html page.
2095             list($headers, $content) = get_http_response($url, 20);
2096             if (strpos($headers[0], '200 OK') !== false)
2097             {
2098                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2099                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2100                 if (!empty($matches[1])) $imageurl=$matches[1];
2101
2102                 // In albums (and some other pages), the link rel="image_src" is not provided,
2103                 // but flickr provides:
2104                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2105                 if ($imageurl=='')
2106                 {
2107                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2108                     if (!empty($matches[1])) $imageurl=$matches[1];
2109                 }
2110             }
2111         }
2112
2113         if ($imageurl!='')
2114         {   // Let's download the image.
2115             // Image is 240x120, so 10 seconds to download should be enough.
2116             list($headers, $content) = get_http_response($imageurl, 10);
2117             if (strpos($headers[0], '200 OK') !== false) {
2118                 // Save image to cache.
2119                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2120                 header('Content-Type: image/jpeg');
2121                 echo $content;
2122                 return;
2123             }
2124         }
2125     }
2126
2127     elseif ($domain=='vimeo.com' )
2128     {
2129         // This is more complex: we have to perform a HTTP request, then parse the result.
2130         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2131         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2132         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2133         if (strpos($headers[0], '200 OK') !== false) {
2134             $t = unserialize($content);
2135             $imageurl = $t[0]['thumbnail_medium'];
2136             // Then we download the image and serve it to our client.
2137             list($headers, $content) = get_http_response($imageurl, 10);
2138             if (strpos($headers[0], '200 OK') !== false) {
2139                 // Save image to cache.
2140                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2141                 header('Content-Type: image/jpeg');
2142                 echo $content;
2143                 return;
2144             }
2145         }
2146     }
2147
2148     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2149     {
2150         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2151         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2152         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2153         list($headers, $content) = get_http_response($url, 5);
2154         if (strpos($headers[0], '200 OK') !== false) {
2155             // Extract the link to the thumbnail
2156             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2157             if (!empty($matches[1]))
2158             {   // Let's download the image.
2159                 $imageurl=$matches[1];
2160                 // No control on image size, so wait long enough
2161                 list($headers, $content) = get_http_response($imageurl, 20);
2162                 if (strpos($headers[0], '200 OK') !== false) {
2163                     $filepath = $cacheDir .'/'. $thumbname;
2164                     file_put_contents($filepath, $content); // Save image to cache.
2165                     if (resizeImage($filepath))
2166                     {
2167                         header('Content-Type: image/jpeg');
2168                         echo file_get_contents($filepath);
2169                         return;
2170                     }
2171                 }
2172             }
2173         }
2174     }
2175
2176     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2177     {
2178         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2179         // http://xkcd.com/327/
2180         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2181         list($headers, $content) = get_http_response($url, 5);
2182         if (strpos($headers[0], '200 OK') !== false) {
2183             // Extract the link to the thumbnail
2184             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2185             if (!empty($matches[1]))
2186             {   // Let's download the image.
2187                 $imageurl=$matches[1];
2188                 // No control on image size, so wait long enough
2189                 list($headers, $content) = get_http_response($imageurl, 20);
2190                 if (strpos($headers[0], '200 OK') !== false) {
2191                     $filepath = $cacheDir.'/'.$thumbname;
2192                     // Save image to cache.
2193                     file_put_contents($filepath, $content);
2194                     if (resizeImage($filepath))
2195                     {
2196                         header('Content-Type: image/jpeg');
2197                         echo file_get_contents($filepath);
2198                         return;
2199                     }
2200                 }
2201             }
2202         }
2203     }
2204
2205     else
2206     {
2207         // For all other domains, we try to download the image and make a thumbnail.
2208         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2209         list($headers, $content) = get_http_response($url, 30);
2210         if (strpos($headers[0], '200 OK') !== false) {
2211             $filepath = $cacheDir .'/'.$thumbname;
2212             // Save image to cache.
2213             file_put_contents($filepath, $content);
2214             if (resizeImage($filepath))
2215             {
2216                 header('Content-Type: image/jpeg');
2217                 echo file_get_contents($filepath);
2218                 return;
2219             }
2220         }
2221     }
2222
2223
2224     // Otherwise, return an empty image (8x8 transparent gif)
2225     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2226     // Also put something in cache so that this URL is not requested twice.
2227     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2228     header('Content-Type: image/gif');
2229     echo $blankgif;
2230 }
2231
2232 // Make a thumbnail of the image (to width: 120 pixels)
2233 // Returns true if success, false otherwise.
2234 function resizeImage($filepath)
2235 {
2236     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2237
2238     // Trick: some stupid people rename GIF as JPEG... or else.
2239     // So we really try to open each image type whatever the extension is.
2240     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2241     $im=false;
2242     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2243     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2244     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2245     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2246     $w = imagesx($im);
2247     $h = imagesy($im);
2248     $ystart = 0; $yheight=$h;
2249     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2250     $nw = 120;   // Desired width
2251     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2252     // Resize image:
2253     $im2 = imagecreatetruecolor($nw,$nh);
2254     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2255     imageinterlace($im2,true); // For progressive JPEG.
2256     $tempname=$filepath.'_TEMP.jpg';
2257     imagejpeg($im2, $tempname, 90);
2258     imagedestroy($im);
2259     imagedestroy($im2);
2260     unlink($filepath);
2261     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2262     return true;
2263 }
2264
2265 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2266 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2267 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2268     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2269 }
2270
2271 try {
2272     $history = new History($conf->get('resource.history'));
2273 } catch(Exception $e) {
2274     die($e->getMessage());
2275 }
2276
2277 $linkDb = new LinkDB(
2278     $conf->get('resource.datastore'),
2279     isLoggedIn(),
2280     $conf->get('privacy.hide_public_links'),
2281     $conf->get('redirector.url'),
2282     $conf->get('redirector.encode_url')
2283 );
2284
2285 $container = new \Slim\Container();
2286 $container['conf'] = $conf;
2287 $container['plugins'] = $pluginManager;
2288 $container['history'] = $history;
2289 $app = new \Slim\App($container);
2290
2291 // REST API routes
2292 $app->group('/api/v1', function() {
2293     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2294     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2295     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2296     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2297     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2298     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2299     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2300 })->add('\Shaarli\Api\ApiMiddleware');
2301
2302 $response = $app->run(true);
2303 // Hack to make Slim and Shaarli router work together:
2304 // If a Slim route isn't found and NOT API call, we call renderPage().
2305 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2306     // We use UTF-8 for proper international characters handling.
2307     header('Content-Type: text/html; charset=utf-8');
2308     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager);
2309 } else {
2310     $app->respond($response);
2311 }