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\LoginManager;
  82 use \Shaarli\SessionManager;
  83
  84 // Ensure the PHP version is supported
  85 try {
  86     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  87 } catch(Exception $exc) {
  88     header('Content-Type: text/plain; charset=utf-8');
  89     echo $exc->getMessage();
  90     exit;
  91 }
  92
  93 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  94
  95 // Force cookie path (but do not change lifetime)
  96 $cookie = session_get_cookie_params();
  97 $cookiedir = '';
  98 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
  99     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 100 }
 101 // Set default cookie expiration and path.
 102 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 103 // Set session parameters on server side.
 104 // If the user does not access any page within this time, his/her session is considered expired.
 105 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
 106 // Use cookies to store session.
 107 ini_set('session.use_cookies', 1);
 108 // Force cookies for session (phpsessionID forbidden in URL).
 109 ini_set('session.use_only_cookies', 1);
 110 // Prevent PHP form using sessionID in URL if cookies are disabled.
 111 ini_set('session.use_trans_sid', false);
 112
 113 session_name('shaarli');
 114 // Start session if needed (Some server auto-start sessions).
 115 if (session_id() == '') {
 116     session_start();
 117 }
 118
 119 // Regenerate session ID if invalid or not defined in cookie.
 120 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 121     session_regenerate_id(true);
 122     $_COOKIE['shaarli'] = session_id();
 123 }
 124
 125 $conf = new ConfigManager();
 126 $loginManager = new LoginManager($GLOBALS, $conf);
 127 $sessionManager = new SessionManager($_SESSION, $conf);
 128
 129 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 130 if (! defined('LC_MESSAGES')) {
 131     define('LC_MESSAGES', LC_COLLATE);
 132 }
 133
 134 // Sniff browser language and set date format accordingly.
 135 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 136     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 137 }
 138
 139 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 140
 141 $conf->setEmpty('general.timezone', date_default_timezone_get());
 142 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 143 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 144 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 145
 146 $pluginManager = new PluginManager($conf);
 147 $pluginManager->load($conf->get('general.enabled_plugins'));
 148
 149 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 150
 151 ob_start();  // Output buffering for the page cache.
 152
 153 // Prevent caching on client side or proxy: (yes, it's ugly)
 154 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 155 header("Cache-Control: no-store, no-cache, must-revalidate");
 156 header("Cache-Control: post-check=0, pre-check=0", false);
 157 header("Pragma: no-cache");
 158
 159 if (! is_file($conf->getConfigFileExt())) {
 160     // Ensure Shaarli has proper access to its resources
 161     $errors = ApplicationUtils::checkResourcePermissions($conf);
 162
 163     if ($errors != array()) {
 164         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 165
 166         foreach ($errors as $error) {
 167             $message .= '<li>'.$error.'</li>';
 168         }
 169         $message .= '</ul>';
 170
 171         header('Content-Type: text/html; charset=utf-8');
 172         echo $message;
 173         exit;
 174     }
 175
 176     // Display the installation form if no existing config is found
 177     install($conf, $sessionManager);
 178 }
 179
 180 // a token depending of deployment salt, user password, and the current ip
 181 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 182
 183 /**
 184  * Checking session state (i.e. is the user still logged in)
 185  *
 186  * @param ConfigManager $conf The configuration manager.
 187  *
 188  * @return bool: true if the user is logged in, false otherwise.
 189  */
 190 function setup_login_state($conf)
 191 {
 192     if ($conf->get('security.open_shaarli')) {
 193         return true;
 194     }
 195     $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 196     $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 197     if (! $conf->exists('credentials.login')) {
 198         $userIsLoggedIn = false;  // Shaarli is not configured yet.
 199         $loginFailure = true;
 200     }
 201     if (isset($_COOKIE['shaarli_staySignedIn']) &&
 202         $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 203         !$loginFailure)
 204     {
 205         fillSessionInfo($conf);
 206         $userIsLoggedIn = true;
 207     }
 208     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 209     if (empty($_SESSION['uid'])
 210         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 211         || time() >= $_SESSION['expires_on'])
 212     {
 213         logout();
 214         $userIsLoggedIn = false;
 215         $loginFailure = true;
 216     }
 217     if (!empty($_SESSION['longlastingsession'])) {
 218         $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 219     }
 220     else {
 221         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 222     }
 223     if (!$loginFailure) {
 224         $userIsLoggedIn = true;
 225     }
 226
 227     return $userIsLoggedIn;
 228 }
 229 $userIsLoggedIn = setup_login_state($conf);
 230
 231 // ------------------------------------------------------------------------------------------
 232 // Session management
 233
 234 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 235 function allIPs()
 236 {
 237     $ip = $_SERVER['REMOTE_ADDR'];
 238     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 239     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 240     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 241     return $ip;
 242 }
 243
 244 /**
 245  * Load user session.
 246  *
 247  * @param ConfigManager $conf Configuration Manager instance.
 248  */
 249 function fillSessionInfo($conf)
 250 {
 251     $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 252     $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 253     $_SESSION['username']= $conf->get('credentials.login');
 254     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 255 }
 256
 257 /**
 258  * Check that user/password is correct.
 259  *
 260  * @param string        $login    Username
 261  * @param string        $password User password
 262  * @param ConfigManager $conf     Configuration Manager instance.
 263  *
 264  * @return bool: authentication successful or not.
 265  */
 266 function check_auth($login, $password, $conf)
 267 {
 268     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 269     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 270     {   // Login/password is correct.
 271         fillSessionInfo($conf);
 272         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 273         return true;
 274     }
 275     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 276     return false;
 277 }
 278
 279 // Returns true if the user is logged in.
 280 function isLoggedIn()
 281 {
 282     global $userIsLoggedIn;
 283     return $userIsLoggedIn;
 284 }
 285
 286 // Force logout.
 287 function logout() {
 288     if (isset($_SESSION)) {
 289         unset($_SESSION['uid']);
 290         unset($_SESSION['ip']);
 291         unset($_SESSION['username']);
 292         unset($_SESSION['visibility']);
 293         unset($_SESSION['untaggedonly']);
 294     }
 295     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 296 }
 297
 298 // ------------------------------------------------------------------------------------------
 299 // Process login form: Check if login/password is correct.
 300 if (isset($_POST['login']))
 301 {
 302     if (! $loginManager->canLogin($_SERVER)) {
 303         die(t('I said: NO. You are banned for the moment. Go away.'));
 304     }
 305     if (isset($_POST['password'])
 306         && $sessionManager->checkToken($_POST['token'])
 307         && (check_auth($_POST['login'], $_POST['password'], $conf))
 308     ) {
 309         // Login/password is OK.
 310         $loginManager->handleSuccessfulLogin($_SERVER);
 311
 312         // If user wants to keep the session cookie even after the browser closes:
 313         if (!empty($_POST['longlastingsession'])) {
 314             $_SESSION['longlastingsession'] = 31536000; // (31536000 seconds = 1 year)
 315             $expiration = time() + $_SESSION['longlastingsession']; // calculate relative cookie expiration (1 year from now)
 316             setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, $expiration, WEB_PATH);
 317             $_SESSION['expires_on'] = $expiration;  // Set session expiration on server-side.
 318
 319             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 320             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 321             // Note: Never forget the trailing slash on the cookie path!
 322             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 323         }
 324         else // Standard session expiration (=when browser closes)
 325         {
 326             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 327             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 328             session_regenerate_id(true);
 329         }
 330
 331         // Optional redirect after login:
 332         if (isset($_GET['post'])) {
 333             $uri = '?post='. urlencode($_GET['post']);
 334             foreach (array('description', 'source', 'title', 'tags') as $param) {
 335                 if (!empty($_GET[$param])) {
 336                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 337                 }
 338             }
 339             header('Location: '. $uri);
 340             exit;
 341         }
 342
 343         if (isset($_GET['edit_link'])) {
 344             header('Location: ?edit_link='. escape($_GET['edit_link']));
 345             exit;
 346         }
 347
 348         if (isset($_POST['returnurl'])) {
 349             // Prevent loops over login screen.
 350             if (strpos($_POST['returnurl'], 'do=login') === false) {
 351                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 352                 exit;
 353             }
 354         }
 355         header('Location: ?'); exit;
 356     } else {
 357         $loginManager->handleFailedLogin($_SERVER);
 358         $redir = '&username='. urlencode($_POST['login']);
 359         if (isset($_GET['post'])) {
 360             $redir .= '&post=' . urlencode($_GET['post']);
 361             foreach (array('description', 'source', 'title', 'tags') as $param) {
 362                 if (!empty($_GET[$param])) {
 363                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 364                 }
 365             }
 366         }
 367         // Redirect to login screen.
 368         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 369         exit;
 370     }
 371 }
 372
 373 // ------------------------------------------------------------------------------------------
 374 // Token management for XSRF protection
 375 // Token should be used in any form which acts on data (create,update,delete,import...).
 376 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 377
 378 /**
 379  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 380  * Gives the last 7 days (which have links).
 381  * This RSS feed cannot be filtered.
 382  *
 383  * @param ConfigManager $conf Configuration Manager instance.
 384  */
 385 function showDailyRSS($conf) {
 386     // Cache system
 387     $query = $_SERVER['QUERY_STRING'];
 388     $cache = new CachedPage(
 389         $conf->get('config.PAGE_CACHE'),
 390         page_url($_SERVER),
 391         startsWith($query,'do=dailyrss') && !isLoggedIn()
 392     );
 393     $cached = $cache->cachedVersion();
 394     if (!empty($cached)) {
 395         echo $cached;
 396         exit;
 397     }
 398
 399     // If cached was not found (or not usable), then read the database and build the response:
 400     // Read links from database (and filter private links if used it not logged in).
 401     $LINKSDB = new LinkDB(
 402         $conf->get('resource.datastore'),
 403         isLoggedIn(),
 404         $conf->get('privacy.hide_public_links'),
 405         $conf->get('redirector.url'),
 406         $conf->get('redirector.encode_url')
 407     );
 408
 409     /* Some Shaarlies may have very few links, so we need to look
 410        back in time until we have enough days ($nb_of_days).
 411     */
 412     $nb_of_days = 7; // We take 7 days.
 413     $today = date('Ymd');
 414     $days = array();
 415
 416     foreach ($LINKSDB as $link) {
 417         $day = $link['created']->format('Ymd'); // Extract day (without time)
 418         if (strcmp($day, $today) < 0) {
 419             if (empty($days[$day])) {
 420                 $days[$day] = array();
 421             }
 422             $days[$day][] = $link;
 423         }
 424
 425         if (count($days) > $nb_of_days) {
 426             break; // Have we collected enough days?
 427         }
 428     }
 429
 430     // Build the RSS feed.
 431     header('Content-Type: application/rss+xml; charset=utf-8');
 432     $pageaddr = escape(index_url($_SERVER));
 433     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 434     echo '<channel>';
 435     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 436     echo '<link>'. $pageaddr .'</link>';
 437     echo '<description>Daily shared links</description>';
 438     echo '<language>en-en</language>';
 439     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 440
 441     // For each day.
 442     foreach ($days as $day => $links) {
 443         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 444         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 445
 446         // We pre-format some fields for proper output.
 447         foreach ($links as &$link) {
 448             $link['formatedDescription'] = format_description(
 449                 $link['description'],
 450                 $conf->get('redirector.url'),
 451                 $conf->get('redirector.encode_url')
 452             );
 453             $link['thumbnail'] = thumbnail($conf, $link['url']);
 454             $link['timestamp'] = $link['created']->getTimestamp();
 455             if (startsWith($link['url'], '?')) {
 456                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 457             }
 458         }
 459
 460         // Then build the HTML for this day:
 461         $tpl = new RainTPL;
 462         $tpl->assign('title', $conf->get('general.title'));
 463         $tpl->assign('daydate', $dayDate->getTimestamp());
 464         $tpl->assign('absurl', $absurl);
 465         $tpl->assign('links', $links);
 466         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 467         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 468         $html = $tpl->draw('dailyrss', true);
 469
 470         echo $html . PHP_EOL;
 471     }
 472     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 473
 474     $cache->cache(ob_get_contents());
 475     ob_end_flush();
 476     exit;
 477 }
 478
 479 /**
 480  * Show the 'Daily' page.
 481  *
 482  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 483  * @param LinkDB        $LINKSDB       LinkDB instance.
 484  * @param ConfigManager $conf          Configuration Manager instance.
 485  * @param PluginManager $pluginManager Plugin Manager instane.
 486  */
 487 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 488 {
 489     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 490     if (isset($_GET['day'])) {
 491       $day = $_GET['day'];
 492     }
 493
 494     $days = $LINKSDB->days();
 495     $i = array_search($day, $days);
 496     if ($i === false && count($days)) {
 497         // no links for day, but at least one day with links
 498         $i = count($days) - 1;
 499         $day = $days[$i];
 500     }
 501     $previousday = '';
 502     $nextday = '';
 503
 504     if ($i !== false) {
 505         if ($i >= 1) {
 506              $previousday=$days[$i - 1];
 507         }
 508         if ($i < count($days) - 1) {
 509           $nextday = $days[$i + 1];
 510         }
 511     }
 512     try {
 513         $linksToDisplay = $LINKSDB->filterDay($day);
 514     } catch (Exception $exc) {
 515         error_log($exc);
 516         $linksToDisplay = array();
 517     }
 518
 519     // We pre-format some fields for proper output.
 520     foreach($linksToDisplay as $key => $link) {
 521         $taglist = explode(' ',$link['tags']);
 522         uasort($taglist, 'strcasecmp');
 523         $linksToDisplay[$key]['taglist']=$taglist;
 524         $linksToDisplay[$key]['formatedDescription'] = format_description(
 525             $link['description'],
 526             $conf->get('redirector.url'),
 527             $conf->get('redirector.encode_url')
 528         );
 529         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 530         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 531     }
 532
 533     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 534     $data = array(
 535         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 536         'linksToDisplay' => $linksToDisplay,
 537         'day' => $dayDate->getTimestamp(),
 538         'dayDate' => $dayDate,
 539         'previousday' => $previousday,
 540         'nextday' => $nextday,
 541     );
 542
 543     /* Hook is called before column construction so that plugins don't have
 544        to deal with columns. */
 545     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 546
 547     /* We need to spread the articles on 3 columns.
 548        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 549        so I manually spread entries with a simple method: I roughly evaluate the
 550        height of a div according to title and description length.
 551     */
 552     $columns = array(array(), array(), array()); // Entries to display, for each column.
 553     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 554     foreach($data['linksToDisplay'] as $key => $link) {
 555         // Roughly estimate length of entry (by counting characters)
 556         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 557         // Description: 836 characters gives roughly 342 pixel height.
 558         // This is not perfect, but it's usually OK.
 559         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 560         if ($link['thumbnail']) {
 561           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 562         }
 563         // Then put in column which is the less filled:
 564         $smallest = min($fill); // find smallest value in array.
 565         $index = array_search($smallest, $fill); // find index of this smallest value.
 566         array_push($columns[$index], $link); // Put entry in this column.
 567         $fill[$index] += $length;
 568     }
 569
 570     $data['cols'] = $columns;
 571
 572     foreach ($data as $key => $value) {
 573         $pageBuilder->assign($key, $value);
 574     }
 575
 576     $pageBuilder->renderPage('daily');
 577     exit;
 578 }
 579
 580 /**
 581  * Renders the linklist
 582  *
 583  * @param pageBuilder   $PAGE    pageBuilder instance.
 584  * @param LinkDB        $LINKSDB LinkDB instance.
 585  * @param ConfigManager $conf    Configuration Manager instance.
 586  * @param PluginManager $pluginManager Plugin Manager instance.
 587  */
 588 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 589     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 590     $PAGE->renderPage('linklist');
 591 }
 592
 593 /**
 594  * Render HTML page (according to URL parameters and user rights)
 595  *
 596  * @param ConfigManager  $conf           Configuration Manager instance.
 597  * @param PluginManager  $pluginManager  Plugin Manager instance,
 598  * @param LinkDB         $LINKSDB
 599  * @param History        $history        instance
 600  * @param SessionManager $sessionManager SessionManager instance
 601  * @param LoginManager   $loginManager   LoginManager instance
 602  */
 603 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 604 {
 605     $updater = new Updater(
 606         read_updates_file($conf->get('resource.updates')),
 607         $LINKSDB,
 608         $conf,
 609         isLoggedIn()
 610     );
 611     try {
 612         $newUpdates = $updater->update();
 613         if (! empty($newUpdates)) {
 614             write_updates_file(
 615                 $conf->get('resource.updates'),
 616                 $updater->getDoneUpdates()
 617             );
 618         }
 619     }
 620     catch(Exception $e) {
 621         die($e->getMessage());
 622     }
 623
 624     $PAGE = new PageBuilder($conf, $LINKSDB, $sessionManager->generateToken());
 625     $PAGE->assign('linkcount', count($LINKSDB));
 626     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 627     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 628
 629     // Determine which page will be rendered.
 630     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 631     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 632
 633     if (
 634         // if the user isn't logged in
 635         !isLoggedIn() &&
 636         // and Shaarli doesn't have public content...
 637         $conf->get('privacy.hide_public_links') &&
 638         // and is configured to enforce the login
 639         $conf->get('privacy.force_login') &&
 640         // and the current page isn't already the login page
 641         $targetPage !== Router::$PAGE_LOGIN &&
 642         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 643         $targetPage !== Router::$PAGE_FEED_ATOM &&
 644         $targetPage !== Router::$PAGE_FEED_RSS
 645     ) {
 646         // force current page to be the login page
 647         $targetPage = Router::$PAGE_LOGIN;
 648     }
 649
 650     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 651     // Then assign generated data to RainTPL.
 652     $common_hooks = array(
 653         'includes',
 654         'header',
 655         'footer',
 656     );
 657
 658     foreach($common_hooks as $name) {
 659         $plugin_data = array();
 660         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 661             array(
 662                 'target' => $targetPage,
 663                 'loggedin' => isLoggedIn()
 664             )
 665         );
 666         $PAGE->assign('plugins_' . $name, $plugin_data);
 667     }
 668
 669     // -------- Display login form.
 670     if ($targetPage == Router::$PAGE_LOGIN)
 671     {
 672         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 673         if (isset($_GET['username'])) {
 674             $PAGE->assign('username', escape($_GET['username']));
 675         }
 676         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 677         // add default state of the 'remember me' checkbox
 678         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 679         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 680         $PAGE->renderPage('loginform');
 681         exit;
 682     }
 683     // -------- User wants to logout.
 684     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 685     {
 686         invalidateCaches($conf->get('resource.page_cache'));
 687         logout();
 688         header('Location: ?');
 689         exit;
 690     }
 691
 692     // -------- Picture wall
 693     if ($targetPage == Router::$PAGE_PICWALL)
 694     {
 695         // Optionally filter the results:
 696         $links = $LINKSDB->filterSearch($_GET);
 697         $linksToDisplay = array();
 698
 699         // Get only links which have a thumbnail.
 700         foreach($links as $link)
 701         {
 702             $permalink='?'.$link['shorturl'];
 703             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 704             if ($thumb!='') // Only output links which have a thumbnail.
 705             {
 706                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 707                 $linksToDisplay[]=$link; // Add to array.
 708             }
 709         }
 710
 711         $data = array(
 712             'linksToDisplay' => $linksToDisplay,
 713         );
 714         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 715
 716         foreach ($data as $key => $value) {
 717             $PAGE->assign($key, $value);
 718         }
 719
 720         $PAGE->renderPage('picwall');
 721         exit;
 722     }
 723
 724     // -------- Tag cloud
 725     if ($targetPage == Router::$PAGE_TAGCLOUD)
 726     {
 727         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 728         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 729         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 730
 731         // We sort tags alphabetically, then choose a font size according to count.
 732         // First, find max value.
 733         $maxcount = 0;
 734         foreach ($tags as $value) {
 735             $maxcount = max($maxcount, $value);
 736         }
 737
 738         alphabetical_sort($tags, false, true);
 739
 740         $tagList = array();
 741         foreach($tags as $key => $value) {
 742             if (in_array($key, $filteringTags)) {
 743                 continue;
 744             }
 745             // Tag font size scaling:
 746             //   default 15 and 30 logarithm bases affect scaling,
 747             //   22 and 6 are arbitrary font sizes for max and min sizes.
 748             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 749             $tagList[$key] = array(
 750                 'count' => $value,
 751                 'size' => number_format($size, 2, '.', ''),
 752             );
 753         }
 754
 755         $data = array(
 756             'search_tags' => implode(' ', escape($filteringTags)),
 757             'tags' => $tagList,
 758         );
 759         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 760
 761         foreach ($data as $key => $value) {
 762             $PAGE->assign($key, $value);
 763         }
 764
 765         $PAGE->renderPage('tag.cloud');
 766         exit;
 767     }
 768
 769     // -------- Tag list
 770     if ($targetPage == Router::$PAGE_TAGLIST)
 771     {
 772         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 773         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 774         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 775         foreach ($filteringTags as $tag) {
 776             if (array_key_exists($tag, $tags)) {
 777                 unset($tags[$tag]);
 778             }
 779         }
 780
 781         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 782             alphabetical_sort($tags, false, true);
 783         }
 784
 785         $data = [
 786             'search_tags' => implode(' ', escape($filteringTags)),
 787             'tags' => $tags,
 788         ];
 789         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 790
 791         foreach ($data as $key => $value) {
 792             $PAGE->assign($key, $value);
 793         }
 794
 795         $PAGE->renderPage('tag.list');
 796         exit;
 797     }
 798
 799     // Daily page.
 800     if ($targetPage == Router::$PAGE_DAILY) {
 801         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 802     }
 803
 804     // ATOM and RSS feed.
 805     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 806         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 807         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 808
 809         // Cache system
 810         $query = $_SERVER['QUERY_STRING'];
 811         $cache = new CachedPage(
 812             $conf->get('resource.page_cache'),
 813             page_url($_SERVER),
 814             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 815         );
 816         $cached = $cache->cachedVersion();
 817         if (!empty($cached)) {
 818             echo $cached;
 819             exit;
 820         }
 821
 822         // Generate data.
 823         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 824         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 825         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 826         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 827         $data = $feedGenerator->buildData();
 828
 829         // Process plugin hook.
 830         $pluginManager->executeHooks('render_feed', $data, array(
 831             'loggedin' => isLoggedIn(),
 832             'target' => $targetPage,
 833         ));
 834
 835         // Render the template.
 836         $PAGE->assignAll($data);
 837         $PAGE->renderPage('feed.'. $feedType);
 838         $cache->cache(ob_get_contents());
 839         ob_end_flush();
 840         exit;
 841     }
 842
 843     // Display opensearch plugin (XML)
 844     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 845         header('Content-Type: application/xml; charset=utf-8');
 846         $PAGE->assign('serverurl', index_url($_SERVER));
 847         $PAGE->renderPage('opensearch');
 848         exit;
 849     }
 850
 851     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 852     if (isset($_GET['addtag']))
 853     {
 854         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 855         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 856         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 857
 858         // Prevent redirection loop
 859         if (isset($params['addtag'])) {
 860             unset($params['addtag']);
 861         }
 862
 863         // Check if this tag is already in the search query and ignore it if it is.
 864         // Each tag is always separated by a space
 865         if (isset($params['searchtags'])) {
 866             $current_tags = explode(' ', $params['searchtags']);
 867         } else {
 868             $current_tags = array();
 869         }
 870         $addtag = true;
 871         foreach ($current_tags as $value) {
 872             if ($value === $_GET['addtag']) {
 873                 $addtag = false;
 874                 break;
 875             }
 876         }
 877         // Append the tag if necessary
 878         if (empty($params['searchtags'])) {
 879             $params['searchtags'] = trim($_GET['addtag']);
 880         }
 881         else if ($addtag) {
 882             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 883         }
 884
 885         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 886         header('Location: ?'.http_build_query($params));
 887         exit;
 888     }
 889
 890     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 891     if (isset($_GET['removetag'])) {
 892         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 893         if (empty($_SERVER['HTTP_REFERER'])) {
 894             header('Location: ?');
 895             exit;
 896         }
 897
 898         // In case browser does not send HTTP_REFERER
 899         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 900
 901         // Prevent redirection loop
 902         if (isset($params['removetag'])) {
 903             unset($params['removetag']);
 904         }
 905
 906         if (isset($params['searchtags'])) {
 907             $tags = explode(' ', $params['searchtags']);
 908             // Remove value from array $tags.
 909             $tags = array_diff($tags, array($_GET['removetag']));
 910             $params['searchtags'] = implode(' ',$tags);
 911
 912             if (empty($params['searchtags'])) {
 913                 unset($params['searchtags']);
 914             }
 915
 916             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 917         }
 918         header('Location: ?'.http_build_query($params));
 919         exit;
 920     }
 921
 922     // -------- User wants to change the number of links per page (linksperpage=...)
 923     if (isset($_GET['linksperpage'])) {
 924         if (is_numeric($_GET['linksperpage'])) {
 925             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 926         }
 927
 928         if (! empty($_SERVER['HTTP_REFERER'])) {
 929             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 930         } else {
 931             $location = '?';
 932         }
 933         header('Location: '. $location);
 934         exit;
 935     }
 936
 937     // -------- User wants to see only private links (toggle)
 938     if (isset($_GET['visibility'])) {
 939         if ($_GET['visibility'] === 'private') {
 940             // Visibility not set or not already private, set private, otherwise reset it
 941             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 942                 // See only private links
 943                 $_SESSION['visibility'] = 'private';
 944             } else {
 945                 unset($_SESSION['visibility']);
 946             }
 947         } else if ($_GET['visibility'] === 'public') {
 948             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 949                 // See only public links
 950                 $_SESSION['visibility'] = 'public';
 951             } else {
 952                 unset($_SESSION['visibility']);
 953             }
 954         }
 955
 956         if (! empty($_SERVER['HTTP_REFERER'])) {
 957             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 958         } else {
 959             $location = '?';
 960         }
 961         header('Location: '. $location);
 962         exit;
 963     }
 964
 965     // -------- User wants to see only untagged links (toggle)
 966     if (isset($_GET['untaggedonly'])) {
 967         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 968
 969         if (! empty($_SERVER['HTTP_REFERER'])) {
 970             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 971         } else {
 972             $location = '?';
 973         }
 974         header('Location: '. $location);
 975         exit;
 976     }
 977
 978     // -------- Handle other actions allowed for non-logged in users:
 979     if (!isLoggedIn())
 980     {
 981         // User tries to post new link but is not logged in:
 982         // Show login screen, then redirect to ?post=...
 983         if (isset($_GET['post']))
 984         {
 985             header( // Redirect to login page, then back to post link.
 986                 'Location: ?do=login&post='.urlencode($_GET['post']).
 987                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 988                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 989                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 990                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 991             );
 992             exit;
 993         }
 994
 995         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
 996         if (isset($_GET['edit_link'])) {
 997             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 998             exit;
 999         }
1000
1001         exit; // Never remove this one! All operations below are reserved for logged in user.
1002     }
1003
1004     // -------- All other functions are reserved for the registered user:
1005
1006     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1007     if ($targetPage == Router::$PAGE_TOOLS)
1008     {
1009         $data = [
1010             'pageabsaddr' => index_url($_SERVER),
1011             'sslenabled' => is_https($_SERVER),
1012         ];
1013         $pluginManager->executeHooks('render_tools', $data);
1014
1015         foreach ($data as $key => $value) {
1016             $PAGE->assign($key, $value);
1017         }
1018
1019         $PAGE->renderPage('tools');
1020         exit;
1021     }
1022
1023     // -------- User wants to change his/her password.
1024     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1025     {
1026         if ($conf->get('security.open_shaarli')) {
1027             die(t('You are not supposed to change a password on an Open Shaarli.'));
1028         }
1029
1030         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1031         {
1032             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
1033
1034             // Make sure old password is correct.
1035             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1036             if ($oldhash!= $conf->get('credentials.hash')) {
1037                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1038                 exit;
1039             }
1040             // Save new password
1041             // Salt renders rainbow-tables attacks useless.
1042             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1043             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1044             try {
1045                 $conf->write(isLoggedIn());
1046             }
1047             catch(Exception $e) {
1048                 error_log(
1049                     'ERROR while writing config file after changing password.' . PHP_EOL .
1050                     $e->getMessage()
1051                 );
1052
1053                 // TODO: do not handle exceptions/errors in JS.
1054                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1055                 exit;
1056             }
1057             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1058             exit;
1059         }
1060         else // show the change password form.
1061         {
1062             $PAGE->renderPage('changepassword');
1063             exit;
1064         }
1065     }
1066
1067     // -------- User wants to change configuration
1068     if ($targetPage == Router::$PAGE_CONFIGURE)
1069     {
1070         if (!empty($_POST['title']) )
1071         {
1072             if (!$sessionManager->checkToken($_POST['token'])) {
1073                 die(t('Wrong token.')); // Go away!
1074             }
1075             $tz = 'UTC';
1076             if (!empty($_POST['continent']) && !empty($_POST['city'])
1077                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1078             ) {
1079                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1080             }
1081             $conf->set('general.timezone', $tz);
1082             $conf->set('general.title', escape($_POST['title']));
1083             $conf->set('general.header_link', escape($_POST['titleLink']));
1084             $conf->set('resource.theme', escape($_POST['theme']));
1085             $conf->set('redirector.url', escape($_POST['redirector']));
1086             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1087             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1088             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1089             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1090             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1091             $conf->set('api.enabled', !empty($_POST['enableApi']));
1092             $conf->set('api.secret', escape($_POST['apiSecret']));
1093             $conf->set('translation.language', escape($_POST['language']));
1094
1095             try {
1096                 $conf->write(isLoggedIn());
1097                 $history->updateSettings();
1098                 invalidateCaches($conf->get('resource.page_cache'));
1099             }
1100             catch(Exception $e) {
1101                 error_log(
1102                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1103                     $e->getMessage()
1104                 );
1105
1106                 // TODO: do not handle exceptions/errors in JS.
1107                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1108                 exit;
1109             }
1110             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1111             exit;
1112         }
1113         else // Show the configuration form.
1114         {
1115             $PAGE->assign('title', $conf->get('general.title'));
1116             $PAGE->assign('theme', $conf->get('resource.theme'));
1117             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1118             $PAGE->assign('redirector', $conf->get('redirector.url'));
1119             list($continents, $cities) = generateTimeZoneData(
1120                 timezone_identifiers_list(),
1121                 $conf->get('general.timezone')
1122             );
1123             $PAGE->assign('continents', $continents);
1124             $PAGE->assign('cities', $cities);
1125             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1126             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1127             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1128             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1129             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1130             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1131             $PAGE->assign('api_secret', $conf->get('api.secret'));
1132             $PAGE->assign('languages', Languages::getAvailableLanguages());
1133             $PAGE->assign('language', $conf->get('translation.language'));
1134             $PAGE->renderPage('configure');
1135             exit;
1136         }
1137     }
1138
1139     // -------- User wants to rename a tag or delete it
1140     if ($targetPage == Router::$PAGE_CHANGETAG)
1141     {
1142         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1143             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1144             $PAGE->renderPage('changetag');
1145             exit;
1146         }
1147
1148         if (!$sessionManager->checkToken($_POST['token'])) {
1149             die(t('Wrong token.'));
1150         }
1151
1152         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1153         $LINKSDB->save($conf->get('resource.page_cache'));
1154         foreach ($alteredLinks as $link) {
1155             $history->updateLink($link);
1156         }
1157         $delete = empty($_POST['totag']);
1158         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1159         $count = count($alteredLinks);
1160         $alert = $delete
1161             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1162             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1163         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1164         exit;
1165     }
1166
1167     // -------- User wants to add a link without using the bookmarklet: Show form.
1168     if ($targetPage == Router::$PAGE_ADDLINK)
1169     {
1170         $PAGE->renderPage('addlink');
1171         exit;
1172     }
1173
1174     // -------- User clicked the "Save" button when editing a link: Save link to database.
1175     if (isset($_POST['save_edit']))
1176     {
1177         // Go away!
1178         if (! $sessionManager->checkToken($_POST['token'])) {
1179             die(t('Wrong token.'));
1180         }
1181
1182         // lf_id should only be present if the link exists.
1183         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1184         // Linkdate is kept here to:
1185         //   - use the same permalink for notes as they're displayed when creating them
1186         //   - let users hack creation date of their posts
1187         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1188         $linkdate = escape($_POST['lf_linkdate']);
1189         if (isset($LINKSDB[$id])) {
1190             // Edit
1191             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1192             $updated = new DateTime();
1193             $shortUrl = $LINKSDB[$id]['shorturl'];
1194             $new = false;
1195         } else {
1196             // New link
1197             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1198             $updated = null;
1199             $shortUrl = link_small_hash($created, $id);
1200             $new = true;
1201         }
1202
1203         // Remove multiple spaces.
1204         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1205         // Remove first '-' char in tags.
1206         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1207         // Remove duplicates.
1208         $tags = implode(' ', array_unique(explode(' ', $tags)));
1209
1210         if (empty(trim($_POST['lf_url']))) {
1211             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1212         }
1213         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1214
1215         $link = array(
1216             'id' => $id,
1217             'title' => trim($_POST['lf_title']),
1218             'url' => $url,
1219             'description' => $_POST['lf_description'],
1220             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1221             'created' => $created,
1222             'updated' => $updated,
1223             'tags' => str_replace(',', ' ', $tags),
1224             'shorturl' => $shortUrl,
1225         );
1226
1227         // If title is empty, use the URL as title.
1228         if ($link['title'] == '') {
1229             $link['title'] = $link['url'];
1230         }
1231
1232         $pluginManager->executeHooks('save_link', $link);
1233
1234         $LINKSDB[$id] = $link;
1235         $LINKSDB->save($conf->get('resource.page_cache'));
1236         if ($new) {
1237             $history->addLink($link);
1238         } else {
1239             $history->updateLink($link);
1240         }
1241
1242         // If we are called from the bookmarklet, we must close the popup:
1243         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1244             echo '<script>self.close();</script>';
1245             exit;
1246         }
1247
1248         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1249         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1250         // Scroll to the link which has been edited.
1251         $location .= '#' . $link['shorturl'];
1252         // After saving the link, redirect to the page the user was on.
1253         header('Location: '. $location);
1254         exit;
1255     }
1256
1257     // -------- User clicked the "Cancel" button when editing a link.
1258     if (isset($_POST['cancel_edit']))
1259     {
1260         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1261         if (! isset($LINKSDB[$id])) {
1262             header('Location: ?');
1263         }
1264         // If we are called from the bookmarklet, we must close the popup:
1265         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1266         $link = $LINKSDB[$id];
1267         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1268         // Scroll to the link which has been edited.
1269         $returnurl .= '#'. $link['shorturl'];
1270         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1271         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1272         exit;
1273     }
1274
1275     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1276     if ($targetPage == Router::$PAGE_DELETELINK)
1277     {
1278         if (! $sessionManager->checkToken($_GET['token'])) {
1279             die(t('Wrong token.'));
1280         }
1281
1282         $ids = trim($_GET['lf_linkdate']);
1283         if (strpos($ids, ' ') !== false) {
1284             // multiple, space-separated ids provided
1285             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1286         } else {
1287             // only a single id provided
1288             $ids = [$ids];
1289         }
1290         // assert at least one id is given
1291         if(!count($ids)){
1292             die('no id provided');
1293         }
1294         foreach ($ids as $id) {
1295             $id = (int) escape($id);
1296             $link = $LINKSDB[$id];
1297             $pluginManager->executeHooks('delete_link', $link);
1298             unset($LINKSDB[$id]);
1299         }
1300         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1301         $history->deleteLink($link);
1302
1303         // If we are called from the bookmarklet, we must close the popup:
1304         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1305
1306         $location = '?';
1307         if (isset($_SERVER['HTTP_REFERER'])) {
1308             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1309             $location = generateLocation(
1310                     $_SERVER['HTTP_REFERER'],
1311                     $_SERVER['HTTP_HOST'],
1312                     ['delete_link', 'edit_link', $link['shorturl']]
1313             );
1314         }
1315
1316         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1317         exit;
1318     }
1319
1320     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1321     if (isset($_GET['edit_link']))
1322     {
1323         $id = (int) escape($_GET['edit_link']);
1324         $link = $LINKSDB[$id];  // Read database
1325         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1326         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1327         $data = array(
1328             'link' => $link,
1329             'link_is_new' => false,
1330             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1331             'tags' => $LINKSDB->linksCountPerTag(),
1332         );
1333         $pluginManager->executeHooks('render_editlink', $data);
1334
1335         foreach ($data as $key => $value) {
1336             $PAGE->assign($key, $value);
1337         }
1338
1339         $PAGE->renderPage('editlink');
1340         exit;
1341     }
1342
1343     // -------- User want to post a new link: Display link edit form.
1344     if (isset($_GET['post'])) {
1345         $url = cleanup_url($_GET['post']);
1346
1347         $link_is_new = false;
1348         // Check if URL is not already in database (in this case, we will edit the existing link)
1349         $link = $LINKSDB->getLinkFromUrl($url);
1350         if (! $link)
1351         {
1352             $link_is_new = true;
1353             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1354             // Get title if it was provided in URL (by the bookmarklet).
1355             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1356             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1357             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1358             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1359             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1360             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1361             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1362                 // Short timeout to keep the application responsive
1363                 // The callback will fill $charset and $title with data from the downloaded page.
1364                 get_http_response($url, 25, 4194304, get_curl_download_callback($charset, $title));
1365                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1366                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1367                 }
1368             }
1369
1370             if ($url == '') {
1371                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1372                 $title = $conf->get('general.default_note_title', t('Note: '));
1373             }
1374             $url = escape($url);
1375             $title = escape($title);
1376
1377             $link = array(
1378                 'linkdate' => $linkdate,
1379                 'title' => $title,
1380                 'url' => $url,
1381                 'description' => $description,
1382                 'tags' => $tags,
1383                 'private' => $private,
1384             );
1385         } else {
1386             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1387         }
1388
1389         $data = array(
1390             'link' => $link,
1391             'link_is_new' => $link_is_new,
1392             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1393             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1394             'tags' => $LINKSDB->linksCountPerTag(),
1395             'default_private_links' => $conf->get('privacy.default_private_links', false),
1396         );
1397         $pluginManager->executeHooks('render_editlink', $data);
1398
1399         foreach ($data as $key => $value) {
1400             $PAGE->assign($key, $value);
1401         }
1402
1403         $PAGE->renderPage('editlink');
1404         exit;
1405     }
1406
1407     if ($targetPage == Router::$PAGE_EXPORT) {
1408         // Export links as a Netscape Bookmarks file
1409
1410         if (empty($_GET['selection'])) {
1411             $PAGE->renderPage('export');
1412             exit;
1413         }
1414
1415         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1416         $selection = $_GET['selection'];
1417         if (isset($_GET['prepend_note_url'])) {
1418             $prependNoteUrl = $_GET['prepend_note_url'];
1419         } else {
1420             $prependNoteUrl = false;
1421         }
1422
1423         try {
1424             $PAGE->assign(
1425                 'links',
1426                 NetscapeBookmarkUtils::filterAndFormat(
1427                     $LINKSDB,
1428                     $selection,
1429                     $prependNoteUrl,
1430                     index_url($_SERVER)
1431                 )
1432             );
1433         } catch (Exception $exc) {
1434             header('Content-Type: text/plain; charset=utf-8');
1435             echo $exc->getMessage();
1436             exit;
1437         }
1438         $now = new DateTime();
1439         header('Content-Type: text/html; charset=utf-8');
1440         header(
1441             'Content-disposition: attachment; filename=bookmarks_'
1442            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1443         );
1444         $PAGE->assign('date', $now->format(DateTime::RFC822));
1445         $PAGE->assign('eol', PHP_EOL);
1446         $PAGE->assign('selection', $selection);
1447         $PAGE->renderPage('export.bookmarks');
1448         exit;
1449     }
1450
1451     if ($targetPage == Router::$PAGE_IMPORT) {
1452         // Upload a Netscape bookmark dump to import its contents
1453
1454         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1455             // Show import dialog
1456             $PAGE->assign(
1457                 'maxfilesize',
1458                 get_max_upload_size(
1459                     ini_get('post_max_size'),
1460                     ini_get('upload_max_filesize'),
1461                     false
1462                 )
1463             );
1464             $PAGE->assign(
1465                 'maxfilesizeHuman',
1466                 get_max_upload_size(
1467                     ini_get('post_max_size'),
1468                     ini_get('upload_max_filesize'),
1469                     true
1470                 )
1471             );
1472             $PAGE->renderPage('import');
1473             exit;
1474         }
1475
1476         // Import bookmarks from an uploaded file
1477         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1478             // The file is too big or some form field may be missing.
1479             $msg = sprintf(
1480                 t(
1481                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1482                     .' (%s). Please upload in smaller chunks.'
1483                 ),
1484                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1485             );
1486             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1487             exit;
1488         }
1489         if (! $sessionManager->checkToken($_POST['token'])) {
1490             die('Wrong token.');
1491         }
1492         $status = NetscapeBookmarkUtils::import(
1493             $_POST,
1494             $_FILES,
1495             $LINKSDB,
1496             $conf,
1497             $history
1498         );
1499         echo '<script>alert("'.$status.'");document.location=\'?do='
1500              .Router::$PAGE_IMPORT .'\';</script>';
1501         exit;
1502     }
1503
1504     // Plugin administration page
1505     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1506         $pluginMeta = $pluginManager->getPluginsMeta();
1507
1508         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1509         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1510         // Load parameters.
1511         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1512         uasort(
1513             $enabledPlugins,
1514             function($a, $b) { return $a['order'] - $b['order']; }
1515         );
1516         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1517
1518         $PAGE->assign('enabledPlugins', $enabledPlugins);
1519         $PAGE->assign('disabledPlugins', $disabledPlugins);
1520         $PAGE->renderPage('pluginsadmin');
1521         exit;
1522     }
1523
1524     // Plugin administration form action
1525     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1526         try {
1527             if (isset($_POST['parameters_form'])) {
1528                 unset($_POST['parameters_form']);
1529                 foreach ($_POST as $param => $value) {
1530                     $conf->set('plugins.'. $param, escape($value));
1531                 }
1532             }
1533             else {
1534                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1535             }
1536             $conf->write(isLoggedIn());
1537             $history->updateSettings();
1538         }
1539         catch (Exception $e) {
1540             error_log(
1541                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1542                 $e->getMessage()
1543             );
1544
1545             // TODO: do not handle exceptions/errors in JS.
1546             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1547             exit;
1548         }
1549         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1550         exit;
1551     }
1552
1553     // Get a fresh token
1554     if ($targetPage == Router::$GET_TOKEN) {
1555         header('Content-Type:text/plain');
1556         echo $sessionManager->generateToken($conf);
1557         exit;
1558     }
1559
1560     // -------- Otherwise, simply display search form and links:
1561     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1562     exit;
1563 }
1564
1565 /**
1566  * Template for the list of links (<div id="linklist">)
1567  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1568  *
1569  * @param pageBuilder   $PAGE          pageBuilder instance.
1570  * @param LinkDB        $LINKSDB       LinkDB instance.
1571  * @param ConfigManager $conf          Configuration Manager instance.
1572  * @param PluginManager $pluginManager Plugin Manager instance.
1573  */
1574 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1575 {
1576     // Used in templates
1577     if (isset($_GET['searchtags'])) {
1578         if (! empty($_GET['searchtags'])) {
1579             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1580         } else {
1581             $searchtags = false;
1582         }
1583     } else {
1584         $searchtags = '';
1585     }
1586     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1587
1588     // Smallhash filter
1589     if (! empty($_SERVER['QUERY_STRING'])
1590         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1591         try {
1592             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1593         } catch (LinkNotFoundException $e) {
1594             $PAGE->render404($e->getMessage());
1595             exit;
1596         }
1597     } else {
1598         // Filter links according search parameters.
1599         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1600         $request = [
1601             'searchtags' => $searchtags,
1602             'searchterm' => $searchterm,
1603         ];
1604         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1605     }
1606
1607     // ---- Handle paging.
1608     $keys = array();
1609     foreach ($linksToDisplay as $key => $value) {
1610         $keys[] = $key;
1611     }
1612
1613
1614
1615     // Select articles according to paging.
1616     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1617     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1618     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1619     $page = $page < 1 ? 1 : $page;
1620     $page = $page > $pagecount ? $pagecount : $page;
1621     // Start index.
1622     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1623     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1624     $linkDisp = array();
1625     while ($i<$end && $i<count($keys))
1626     {
1627         $link = $linksToDisplay[$keys[$i]];
1628         $link['description'] = format_description(
1629             $link['description'],
1630             $conf->get('redirector.url'),
1631             $conf->get('redirector.encode_url')
1632         );
1633         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1634         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1635         $link['timestamp'] = $link['created']->getTimestamp();
1636         if (! empty($link['updated'])) {
1637             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1638         } else {
1639             $link['updated_timestamp'] = '';
1640         }
1641         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1642         uasort($taglist, 'strcasecmp');
1643         $link['taglist'] = $taglist;
1644         // Check for both signs of a note: starting with ? and 7 chars long.
1645         if ($link['url'][0] === '?' &&
1646             strlen($link['url']) === 7) {
1647             $link['url'] = index_url($_SERVER) . $link['url'];
1648         }
1649
1650         $linkDisp[$keys[$i]] = $link;
1651         $i++;
1652     }
1653
1654     // Compute paging navigation
1655     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1656     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1657     $previous_page_url = '';
1658     if ($i != count($keys)) {
1659         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1660     }
1661     $next_page_url='';
1662     if ($page>1) {
1663         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1664     }
1665
1666     // Fill all template fields.
1667     $data = array(
1668         'previous_page_url' => $previous_page_url,
1669         'next_page_url' => $next_page_url,
1670         'page_current' => $page,
1671         'page_max' => $pagecount,
1672         'result_count' => count($linksToDisplay),
1673         'search_term' => $searchterm,
1674         'search_tags' => $searchtags,
1675         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1676         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1677         'links' => $linkDisp,
1678     );
1679
1680     // If there is only a single link, we change on-the-fly the title of the page.
1681     if (count($linksToDisplay) == 1) {
1682         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1683     }
1684
1685     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1686
1687     foreach ($data as $key => $value) {
1688         $PAGE->assign($key, $value);
1689     }
1690
1691     return;
1692 }
1693
1694 /**
1695  * Compute the thumbnail for a link.
1696  *
1697  * With a link to the original URL.
1698  * Understands various services (youtube.com...)
1699  * Input: $url = URL for which the thumbnail must be found.
1700  *        $href = if provided, this URL will be followed instead of $url
1701  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1702  * Some of them may be missing.
1703  * Return an empty array if no thumbnail available.
1704  *
1705  * @param ConfigManager $conf Configuration Manager instance.
1706  * @param string        $url
1707  * @param string|bool   $href
1708  *
1709  * @return array
1710  */
1711 function computeThumbnail($conf, $url, $href = false)
1712 {
1713     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1714     if ($href==false) $href=$url;
1715
1716     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1717     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1718     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1719     $domain = parse_url($url,PHP_URL_HOST);
1720     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1721     {
1722         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1723         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1724                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1725     }
1726     if ($domain=='youtu.be') // Youtube short links
1727     {
1728         $path = parse_url($url,PHP_URL_PATH);
1729         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1730                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1731     }
1732     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1733     {
1734         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1735         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1736                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1737     }
1738
1739     if ($domain=='imgur.com')
1740     {
1741         $path = parse_url($url,PHP_URL_PATH);
1742         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1743         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1744                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1745         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1746                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1747
1748         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1749                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1750     }
1751     if ($domain=='i.imgur.com')
1752     {
1753         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1754         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1755                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1756     }
1757     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1758     {
1759         if (strpos($url,'dailymotion.com/video/')!==false)
1760         {
1761             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1762             return array('src'=>$thumburl,
1763                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1764         }
1765     }
1766     if (endsWith($domain,'.imageshack.us'))
1767     {
1768         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1769         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1770         {
1771             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1772             return array('src'=>$thumburl,
1773                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1774         }
1775     }
1776
1777     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1778     // So we deport the thumbnail generation in order not to slow down page generation
1779     // (and we also cache the thumbnail)
1780
1781     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1782
1783     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1784         || $domain=='vimeo.com'
1785         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1786         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1787     )
1788     {
1789         if ($domain=='vimeo.com')
1790         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1791             $path = parse_url($url,PHP_URL_PATH);
1792             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1793         }
1794         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1795         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1796             $path = parse_url($url,PHP_URL_PATH);
1797             if (!preg_match('!/\d+.+?!',$path)) return array();
1798         }
1799         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1800         {   // Make sure this TED URL points to a video (/talks/...)
1801             $path = parse_url($url,PHP_URL_PATH);
1802             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1803         }
1804         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1805         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1806                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1807     }
1808
1809     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1810     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1811     // But using the extension will do.
1812     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1813     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1814     {
1815         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1816         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1817                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1818     }
1819     return array(); // No thumbnail.
1820
1821 }
1822
1823
1824 // Returns the HTML code to display a thumbnail for a link
1825 // with a link to the original URL.
1826 // Understands various services (youtube.com...)
1827 // Input: $url = URL for which the thumbnail must be found.
1828 //        $href = if provided, this URL will be followed instead of $url
1829 // Returns '' if no thumbnail available.
1830 function thumbnail($url,$href=false)
1831 {
1832     // FIXME!
1833     global $conf;
1834     $t = computeThumbnail($conf, $url,$href);
1835     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1836
1837     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1838     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1839     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1840     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1841     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1842     $html.='></a>';
1843     return $html;
1844 }
1845
1846 // Returns the HTML code to display a thumbnail for a link
1847 // for the picture wall (using lazy image loading)
1848 // Understands various services (youtube.com...)
1849 // Input: $url = URL for which the thumbnail must be found.
1850 //        $href = if provided, this URL will be followed instead of $url
1851 // Returns '' if no thumbnail available.
1852 function lazyThumbnail($conf, $url,$href=false)
1853 {
1854     // FIXME!
1855     global $conf;
1856     $t = computeThumbnail($conf, $url,$href);
1857     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1858
1859     $html='<a href="'.escape($t['href']).'">';
1860
1861     // Lazy image
1862     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1863
1864     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1865     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1866     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1867     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1868     $html.='>';
1869
1870     // No-JavaScript fallback.
1871     $html.='<noscript><img src="'.escape($t['src']).'"';
1872     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1873     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1874     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1875     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1876     $html.='></noscript></a>';
1877
1878     return $html;
1879 }
1880
1881
1882 /**
1883  * Installation
1884  * This function should NEVER be called if the file data/config.php exists.
1885  *
1886  * @param ConfigManager  $conf           Configuration Manager instance.
1887  * @param SessionManager $sessionManager SessionManager instance
1888  */
1889 function install($conf, $sessionManager) {
1890     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1891     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1892
1893
1894     // This part makes sure sessions works correctly.
1895     // (Because on some hosts, session.save_path may not be set correctly,
1896     // or we may not have write access to it.)
1897     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1898     {
1899         // Step 2: Check if data in session is correct.
1900         $msg = t(
1901             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1902             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1903             'and that you have write access to it.<br>'.
1904             'It currently points to %s.<br>'.
1905             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1906             'or any custom hostname without a dot causes cookie storage to fail. '.
1907             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1908         );
1909         $msg = sprintf($msg, session_save_path());
1910         echo $msg;
1911         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1912         die;
1913     }
1914     if (!isset($_SESSION['session_tested']))
1915     {   // Step 1 : Try to store data in session and reload page.
1916         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1917         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1918     }
1919     if (isset($_GET['test_session']))
1920     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1921         header('Location: '.index_url($_SERVER));
1922     }
1923
1924
1925     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1926     {
1927         $tz = 'UTC';
1928         if (!empty($_POST['continent']) && !empty($_POST['city'])
1929             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1930         ) {
1931             $tz = $_POST['continent'].'/'.$_POST['city'];
1932         }
1933         $conf->set('general.timezone', $tz);
1934         $login = $_POST['setlogin'];
1935         $conf->set('credentials.login', $login);
1936         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1937         $conf->set('credentials.salt', $salt);
1938         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1939         if (!empty($_POST['title'])) {
1940             $conf->set('general.title', escape($_POST['title']));
1941         } else {
1942             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1943         }
1944         $conf->set('translation.language', escape($_POST['language']));
1945         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1946         $conf->set('api.enabled', !empty($_POST['enableApi']));
1947         $conf->set(
1948             'api.secret',
1949             generate_api_secret(
1950                 $conf->get('credentials.login'),
1951                 $conf->get('credentials.salt')
1952             )
1953         );
1954         try {
1955             // Everything is ok, let's create config file.
1956             $conf->write(isLoggedIn());
1957         }
1958         catch(Exception $e) {
1959             error_log(
1960                     'ERROR while writing config file after installation.' . PHP_EOL .
1961                     $e->getMessage()
1962                 );
1963
1964             // TODO: do not handle exceptions/errors in JS.
1965             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1966             exit;
1967         }
1968         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
1969         exit;
1970     }
1971
1972     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
1973     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1974     $PAGE->assign('continents', $continents);
1975     $PAGE->assign('cities', $cities);
1976     $PAGE->assign('languages', Languages::getAvailableLanguages());
1977     $PAGE->renderPage('install');
1978     exit;
1979 }
1980
1981 /**
1982  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
1983  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
1984  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
1985  * This function is called by passing the URL:
1986  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
1987  * [URL] is the URL of the link (e.g. a flickr page)
1988  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
1989  * The function below will fetch the image from the webservice and store it in the cache.
1990  *
1991  * @param ConfigManager $conf Configuration Manager instance,
1992  */
1993 function genThumbnail($conf)
1994 {
1995     // Make sure the parameters in the URL were generated by us.
1996     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
1997     if ($sign!=$_GET['hmac']) die('Naughty boy!');
1998
1999     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2000     // Let's see if we don't already have the image for this URL in the cache.
2001     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2002     if (is_file($cacheDir .'/'. $thumbname))
2003     {   // We have the thumbnail, just serve it:
2004         header('Content-Type: image/jpeg');
2005         echo file_get_contents($cacheDir .'/'. $thumbname);
2006         return;
2007     }
2008     // We may also serve a blank image (if service did not respond)
2009     $blankname=hash('sha1',$_GET['url']).'.gif';
2010     if (is_file($cacheDir .'/'. $blankname))
2011     {
2012         header('Content-Type: image/gif');
2013         echo file_get_contents($cacheDir .'/'. $blankname);
2014         return;
2015     }
2016
2017     // Otherwise, generate the thumbnail.
2018     $url = $_GET['url'];
2019     $domain = parse_url($url,PHP_URL_HOST);
2020
2021     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2022     {
2023         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2024         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2025
2026         // Is this a link to an image, or to a flickr page ?
2027         $imageurl='';
2028         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2029         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2030             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2031             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2032         }
2033         else // This is a flickr page (html)
2034         {
2035             // Get the flickr html page.
2036             list($headers, $content) = get_http_response($url, 20);
2037             if (strpos($headers[0], '200 OK') !== false)
2038             {
2039                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2040                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2041                 if (!empty($matches[1])) $imageurl=$matches[1];
2042
2043                 // In albums (and some other pages), the link rel="image_src" is not provided,
2044                 // but flickr provides:
2045                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2046                 if ($imageurl=='')
2047                 {
2048                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2049                     if (!empty($matches[1])) $imageurl=$matches[1];
2050                 }
2051             }
2052         }
2053
2054         if ($imageurl!='')
2055         {   // Let's download the image.
2056             // Image is 240x120, so 10 seconds to download should be enough.
2057             list($headers, $content) = get_http_response($imageurl, 10);
2058             if (strpos($headers[0], '200 OK') !== false) {
2059                 // Save image to cache.
2060                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2061                 header('Content-Type: image/jpeg');
2062                 echo $content;
2063                 return;
2064             }
2065         }
2066     }
2067
2068     elseif ($domain=='vimeo.com' )
2069     {
2070         // This is more complex: we have to perform a HTTP request, then parse the result.
2071         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2072         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2073         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2074         if (strpos($headers[0], '200 OK') !== false) {
2075             $t = unserialize($content);
2076             $imageurl = $t[0]['thumbnail_medium'];
2077             // Then we download the image and serve it to our client.
2078             list($headers, $content) = get_http_response($imageurl, 10);
2079             if (strpos($headers[0], '200 OK') !== false) {
2080                 // Save image to cache.
2081                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2082                 header('Content-Type: image/jpeg');
2083                 echo $content;
2084                 return;
2085             }
2086         }
2087     }
2088
2089     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2090     {
2091         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2092         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2093         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2094         list($headers, $content) = get_http_response($url, 5);
2095         if (strpos($headers[0], '200 OK') !== false) {
2096             // Extract the link to the thumbnail
2097             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2098             if (!empty($matches[1]))
2099             {   // Let's download the image.
2100                 $imageurl=$matches[1];
2101                 // No control on image size, so wait long enough
2102                 list($headers, $content) = get_http_response($imageurl, 20);
2103                 if (strpos($headers[0], '200 OK') !== false) {
2104                     $filepath = $cacheDir .'/'. $thumbname;
2105                     file_put_contents($filepath, $content); // Save image to cache.
2106                     if (resizeImage($filepath))
2107                     {
2108                         header('Content-Type: image/jpeg');
2109                         echo file_get_contents($filepath);
2110                         return;
2111                     }
2112                 }
2113             }
2114         }
2115     }
2116
2117     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2118     {
2119         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2120         // http://xkcd.com/327/
2121         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2122         list($headers, $content) = get_http_response($url, 5);
2123         if (strpos($headers[0], '200 OK') !== false) {
2124             // Extract the link to the thumbnail
2125             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2126             if (!empty($matches[1]))
2127             {   // Let's download the image.
2128                 $imageurl=$matches[1];
2129                 // No control on image size, so wait long enough
2130                 list($headers, $content) = get_http_response($imageurl, 20);
2131                 if (strpos($headers[0], '200 OK') !== false) {
2132                     $filepath = $cacheDir.'/'.$thumbname;
2133                     // Save image to cache.
2134                     file_put_contents($filepath, $content);
2135                     if (resizeImage($filepath))
2136                     {
2137                         header('Content-Type: image/jpeg');
2138                         echo file_get_contents($filepath);
2139                         return;
2140                     }
2141                 }
2142             }
2143         }
2144     }
2145
2146     else
2147     {
2148         // For all other domains, we try to download the image and make a thumbnail.
2149         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2150         list($headers, $content) = get_http_response($url, 30);
2151         if (strpos($headers[0], '200 OK') !== false) {
2152             $filepath = $cacheDir .'/'.$thumbname;
2153             // Save image to cache.
2154             file_put_contents($filepath, $content);
2155             if (resizeImage($filepath))
2156             {
2157                 header('Content-Type: image/jpeg');
2158                 echo file_get_contents($filepath);
2159                 return;
2160             }
2161         }
2162     }
2163
2164
2165     // Otherwise, return an empty image (8x8 transparent gif)
2166     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2167     // Also put something in cache so that this URL is not requested twice.
2168     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2169     header('Content-Type: image/gif');
2170     echo $blankgif;
2171 }
2172
2173 // Make a thumbnail of the image (to width: 120 pixels)
2174 // Returns true if success, false otherwise.
2175 function resizeImage($filepath)
2176 {
2177     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2178
2179     // Trick: some stupid people rename GIF as JPEG... or else.
2180     // So we really try to open each image type whatever the extension is.
2181     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2182     $im=false;
2183     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2184     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2185     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2186     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2187     $w = imagesx($im);
2188     $h = imagesy($im);
2189     $ystart = 0; $yheight=$h;
2190     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2191     $nw = 120;   // Desired width
2192     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2193     // Resize image:
2194     $im2 = imagecreatetruecolor($nw,$nh);
2195     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2196     imageinterlace($im2,true); // For progressive JPEG.
2197     $tempname=$filepath.'_TEMP.jpg';
2198     imagejpeg($im2, $tempname, 90);
2199     imagedestroy($im);
2200     imagedestroy($im2);
2201     unlink($filepath);
2202     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2203     return true;
2204 }
2205
2206 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2207 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2208 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2209     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2210 }
2211
2212 try {
2213     $history = new History($conf->get('resource.history'));
2214 } catch(Exception $e) {
2215     die($e->getMessage());
2216 }
2217
2218 $linkDb = new LinkDB(
2219     $conf->get('resource.datastore'),
2220     isLoggedIn(),
2221     $conf->get('privacy.hide_public_links'),
2222     $conf->get('redirector.url'),
2223     $conf->get('redirector.encode_url')
2224 );
2225
2226 $container = new \Slim\Container();
2227 $container['conf'] = $conf;
2228 $container['plugins'] = $pluginManager;
2229 $container['history'] = $history;
2230 $app = new \Slim\App($container);
2231
2232 // REST API routes
2233 $app->group('/api/v1', function() {
2234     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2235     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2236     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2237     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2238     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2239     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2240     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2241 })->add('\Shaarli\Api\ApiMiddleware');
2242
2243 $response = $app->run(true);
2244 // Hack to make Slim and Shaarli router work together:
2245 // If a Slim route isn't found and NOT API call, we call renderPage().
2246 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2247     // We use UTF-8 for proper international characters handling.
2248     header('Content-Type: text/html; charset=utf-8');
2249     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
2250 } else {
2251     $app->respond($response);
2252 }