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