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